Columbia Base zoning districts ordinance (§ 29-2.2)

Chapter 29: Unified Development Code · Article 2. Zoning Districts

(a) Residential zone districts.

(1) R-1: One-family dwelling district.

(i) Purpose. This district is intended to promote and preserve safe and attractive urban one-family residential neighborhoods. The principal land use is a one-family dwelling unit per lot. Some public recreational uses, religious facilities, educational facilities, and uses incidental or accessory to dwellings are included, as shown in Table 29-3.1 (Permitted Use Table).

Table 29-2.2 R-1 District Dimensional Standard Summary

Lot Standards[1]

Minimum lot area 7,000 sq. ft.

Minimum lot area if no public or community sewer available 15,000 sq. ft.

Minimum lot width at building line 60 ft.

Building Standards

Minimum depth front yard 25 ft.

Minimum width of side yard 6 ft.

Minimum depth of rear yard Lesser of 30% lot depth or 25 ft.

Maximum height of primary residential building 35 ft.

Maximum height of primary residential building if 2 side setbacks of at least 15 ft. each 45 ft.

Maximum height of primary nonresidential building, provided all setbacks increased 1 ft. for each additional 75 ft. 1 ft. of height over 35 ft.

This Table is a summary of selected standards; refer to Chapter 29-4.1 Dimension Standards, for additional regulations.

Footnote [1]: Standards may be reduced for "substandard lots" to those shown in Section 29-4.1(b)(8).

(ii) Illustration. The following diagram is a graphical depiction of the R-1 district to be used for illustration purposes only.

(iii) Other standards. All development shall comply with all other applicable regulations in this chapter, including without limitation the permitted use regulations in article 3 and the form and development regulations in article 4.

(2) R-2 Two-family dwelling district.

(i) Purpose. This district is intended to provide for a blend of one-and two-family residential developments that will promote strong neighborhoods. The district is intended to accommodate both standard residential development and small pockets of affordable small lot infill "cottage" residential development. The "cottage" standards require approval by the board of adjustment

pursuant to section 29-6.4(j). The principal land use is one-family or duplex residential dwellings, as shown in Table 29-3.1 (Permitted Use Table). One principal structure is allowed per lot; two or more single-family detached dwellings are not permitted on a single lot.

Table 29-2.3 R-2 District Dimensional Standard Summary

Current Cottage

Lot Standards[1]

Minimum lot area - one-family 5,000 sq. ft. 3,000 sq. ft.

Minimum lot area - one-family attached 3,500 sq. ft. N/A

Minimum lot area - two-family 7,000 sq. ft. N/A

Minimum lot area if no public or community sewer available 15,000 sq. ft

Minimum lot width at building line 60 ft. 30 ft.

Minimum lot width at building line - single-family attached 30 ft. N/A

Building Standards

Minimum depth front yard 25 ft. 10 ft.

Minimum depth from front lot line to garage (if applicable) 25 ft. 20 ft.

Minimum width of side yard 6 ft. 6 ft.

Minimum depth of rear yard Lesser of 25% lot depth or 10 ft.

25 ft.

Maximum height of primary residential building 35 ft. 35 ft.

Maximum height of primary residential building if 2 side setbacks of at least 15 ft. 45 ft. 35 ft. each

Maximum height of nonresidential building 75 ft. N/A

This Table is a summary of selected standards; refer to Chapter 29-4.1 Dimension Standards, for additional regulations.

Footnote [1]: Standards may be reduced for "substandard lots" to those shown in Section 29-4.1(b)(8).

(ii) Illustration. The following diagram is a graphical depiction of the R-2 district to be used for illustration purposes only.

(3) R-MF multiple-family dwelling district.

(i) Purpose. This district is intended to provide for a mix of one-family, two-family, and medium density multi-family residential development. It may include a range of residential uses from onefamily to medium and high density multi-family apartments and condominiums and fraternity and sorority houses. The scale of development is regulated to ensure that new development is not out-of-scale with the character and density of currently existing adjacent uses or zoning. The principal uses are residential, as shown in Table 29-3.1 (Permitted Use Table).

Table 29-2.4 R-MF District Dimensional Standard Summary

Lot Standards[1]

Minimum lot area - one-family 5,000 sq. ft.

Minimum lot area - one-family attached 3,500 sq. ft.

Minimum lot area - two-family 7,000 sq. ft.

Minimum lot area - multi-family 2,500 sq. ft. per du

Minimum lot area - sorority or fraternity 7,500

Minimum lot area - CRCC N/A, but max. density is 17 du/ac

Minimum lot width at building line 60 ft.

Minimum lot width at building line - single-family attached 30 ft.

Building Standards

Minimum depth front yard 25 ft.

Minimum width of side yard - all other 10 ft.

Minimum width of side yard - corner lot street side 15 ft.

Minimum depth of rear yard 25 ft.

Maximum height of primary residential building 35 ft.

This table is a summary of selected standards; refer to chapter 29-4.1 dimension standards, for additional regulations.

Footnote [1]: Standards may be reduced for "substandard lots" to those shown in Section 29-4.1(b)(8).

(ii) Illustration. The following diagram is a graphical depiction of the R-MF district to be used for illustration purposes only.

(4) R-MH residential manufactured home district.

(i) Purpose. This district is intended to provide for the development and operation of residential manufactured home parks. The standards are intended to provide for diverse housing opportunities and promote innovative and land-efficient sources of affordable housing while

promoting neighborhood enhancement and minimizing conflicts with other zoning districts. A residential manufactured home park may provide manufactured home spaces available for lease or rent; or the property may be subdivided in accordance with the requirements of section 29-2.2(a)(4)c. and article 5 (subdivision standards).

Table 29-2.5 R-MH District Dimensional Standards

Sites and Structures

Minimum area of each home site 3,750 sq. ft.

Minimum lot width 45 ft.

Maximum building height 35 ft.

Minimum front setback of homes from abutting public street in the park 20 ft.

Minimum side and rear setback sites from other mobile home site boundaries 10 ft.

Minimum distance between dwelling units 20 ft.

This Table is a summary of selected standards; refer to Chapter 29-4.1 Dimension Standards, for additional regulations.

(ii) Illustration. The following diagram is a graphical depiction of the R-MH district to be used for illustration purposes only.

(iii)

Other standards. In addition to compliance with all other applicable regulations in this chapter, including without limitation the permitted use regulations in article 3 and the form and development regulations in article 4, development in the R-MH district shall comply with the following standards:

(A) Required park boundary setback areas along the side and rear property boundaries shall be landscaped and shall not contain parking areas, streets, drives, or accessory structures or storage areas. A permanent screen consisting of a masonry wall, wood fence, landscaping material, or combination thereof, at least eight (8) feet in height and, when a fence is used, not to exceed twelve (12) feet in height, shall be required around the perimeter of the site. The required screening shall have an opacity of at least eighty (80) percent year around and, if landscaping is used, the eighty (80) percent opacity shall be achieved within four (4) full growing seasons. If a masonry wall or wood fence is used, landscaping shall be placed between the wall or fence and the property line to form an ornamental screen. The required screening shall be maintained in good order and not allowed to exist in a state of disrepair or death. If wood fencing is used, it shall be durable in nature or treated to prevent rapid deterioration. Failure to maintain the required screening shall be considered a violation of this chapter.

(B) Carports, patios, decks and accessory buildings may be located in side and rear setback areas of individual manufactured home sites that are not part of the required park perimeter buffer area.

(C) A private outdoor living area, such as a patio or deck, of at least forty (40) square feet shall be provided on each manufactured home space or lot adjoining the manufactured home.

(D) A stormwater management system shall be designed to minimize the possibility of soil erosion and flood damage on site and downstream.

(E) Interior access shall be provided by public or private streets. Public streets shall be built to city standards and shall have sidewalks on both sides. Private streets shall require private street maintenance.

(F) Manufactured home parks shall have their only access on perimeter streets unless the director determines that street connections to adjacent properties are necessary to protect public safety and reduce traffic congestion at access points.

(G) Street connections to adjacent properties may be required when deemed appropriate by the director; however, at least one access point onto a public street shall be provided for each one hundred (100) manufactured home spaces or lots.

(H) Paved parking shall be provided on each manufactured home space or lot at the rate of one parking space per manufactured home.

(I) An on-ground or in-ground stand constructed to comply with the building code shall be provided to provide support and leveling for each manufactured home.

(J)

Anchorage and tie-down constructed to comply with the building code shall be provided on each manufactured home space or lot to prevent overturning or uplift of the manufactured home.

(K) Skirting shall be installed for each manufactured home. Skirting material shall be visually compatible with the manufactured home unit's materials and shall have a visually finished appearance. Composition building board and raw wood shall not be used as skirting unless finished with a weatherproof and termite proof material.

(L) A map of the layout of the manufactured home park, of a scale not greater than 1:50, showing the location of individual manufactured home spaces by number, shall be displayed on the park office building, or on the identification sign at the entrance to the manufactured home park.

(M) Each space for a manufactured home shall be provided with a sewer outlet not less than four

(4) inches in diameter, connected to the main sewer system.

(N) In addition to required automobile parking spaces, the manufactured home park shall provide at least one accessory vehicle storage area for each ten (10) manufactured homes, to provide storage for trucks, boats, and similar vehicles.

(O) If storage facilities for tenants are provided on the manufactured home space or lot or elsewhere in the manufactured home park, they shall be constructed of suitable weather resistant materials.

(P) All yard areas and other open spaces not otherwise paved or occupied by structures shall be landscaped and maintained.

(Q) Any enclosed structure attached to a manufactured home shall be constructed of compatible or similar exterior materials and in conformance with the building code.

(R) R-MH developments consisting of twenty-five (25) or more manufactured homes shall contain playground facilities. The playground facilities shall be at least one-fourth (¼) acre in size for each twenty-five (25) manufactured homes proposed.

(S) No mobile home (as opposed to a manufactured home) shall be placed within any R-MH district established after January 17, 1995, unless a seal issued by the Missouri Public Service Commission is attached to the mobile home certifying that the mobile home was brought up to or otherwise meets the requirements of the code of standards relating to manufactured homes adopted by the public service commission.

(b) Mixed use districts.

(1) M-OF mixed use - office district.

(i) Purpose. This district is intended to provide for professional, administrative, corporate, and other offices and similar low-impact non-residential uses. It may serve as a buffer area between residential and more intense nonresidential uses. It is intended to allow innovative design

approaches that reflect and respect the character of nearby residential areas without the need for rezoning to a planned development district. The principal uses are small-scale office, personal service, and residential uses, as shown in Table 29-3.1 (Permitted Use Table).

Table 29-2-6 M-OF District Dimensional Standard Summary

Lot Standards

Minimum lot area N/A

Minimum lot width at building line N/A

Building Standards

Minimum depth front yard 25 ft.

Minimum width of side yard - general 0

Minimum width of side yard - corner lot street side 15 ft.

Minimum width of side yard - adjacent to R district 10 ft.

Minimum depth of rear yard 25 ft.

Maximum height of primary building 45 ft.

This Table is a summary of selected standards; refer to Chapter 29-4.1 Dimension Standards, for additional regulations.

(ii) Illustration. The following diagram is a graphical depiction of the M-OF district to be used for illustration purposes only.

(iii)

Other standards. All development shall comply with all other applicable regulations in this chapter, including without limitation the permitted use regulations in article 3 and the form and development regulations in article 4.

(2) M-N mixed use - neighborhood district.

(i) Purpose. The mixed use-neighborhood district is intended to provide commercial shopping and service facilities in or near a residential neighborhood. The principal land use is a small shopping area with sales and services oriented to the needs of a local population. The district is intended to accommodate both pedestrian-oriented shopping areas with walkable connections to surrounding neighborhoods and small auto-oriented shopping centers convenient to lower density residential areas, through the use of two different sets of development standards without the need for rezoning to a planned development district. The "pedestrian" standards require approval by the board of adjustment pursuant to section 29-6.4(j). The principle uses are smallscale commercial and residential, as shown in Table 29-3.1 (Permitted Use Table).

Table 29-2-7 M-N District Dimensional Standard Summary

Current Pedestrian

Lot Standards

Minimum lot area N/A N/A

Minimum lot width at building line N/A N/A

Building Standards

Minimum depth of front yard 25 ft. O ft.

Maximum depth of front yard N/A 10 ft.

Percent of building front width that must be between min. and max. setback lines N/A 75%

Minimum width of side yard - general 0 ft. 0 ft.

Minimum width of side yard - corner lot street side 15 ft. 0 ft.

Minimum width of side yard - adjacent to R district 10 ft. 10 ft.

Minimum depth of rear yard - general 0 ft. 0 ft.

Minimum depth of rear yard - adjacent to R district 10 ft. 10 ft.

Maximum height of primary building 35 ft. 35 ft.

This Table is a summary of selected standards; refer to Chapter 29-4.1 Dimension Standards, for additional regulations.

(ii) Illustration. The following diagram is a graphical depiction of the M-N district to be used for illustration purposes only.

(iii) Other standards. In addition to compliance with all other applicable regulations in this chapter, including without limitation the permitted use regulations in article 3 and the form and development regulations in article 4, development in the M-N district shall comply with the following when the applicant requests that the M-N "pedestrian" standards apply:

(A) All property frontages must have sidewalks constructed to city standards.

(B) The primary building must have at least one operable pedestrian door leading directly from the primary building onto a sidewalk. For primary buildings located on corner lots, the required pedestrian entrance may be located on the primary street façade or at the corner where the two streets intersect.

(C) Ground floor street frontages on each primary building may not be occupied by residential uses but may be occupied by a lobby or entrance to residential portions of the building.

(D) At least fifty (50) percent of the building front façade area between three (3) and eight (8) feet above grade shall be of windows or other transparent materials allowing views into the building.

(E) At the applicant's option, minimum on-site parking requirements may be reduced up to thirty

(30) percent as described in section 29-4.3 (parking and loading).

(F) No on-site loading requirements shall be required.

(G) Curb cuts shall only be permitted if access cannot be provided from an alley. Where curb cuts are permitted, they shall not exceed twenty-four (24) feet in width.

(3) M-C mixed use - corridor district.

(i)

Purpose. This district is intended to allow for a broad range of commercial activities that may often be oriented toward automobile access and visibility, as well as multi-family residential uses without the need for rezoning to a planned development district. Larger buildings are permitted and less parking is required near the intersections of arterial-arterial, and arterial-collector corners to promote higher bus transit ridership at these nodes where current bus lines exist or future bus service is anticipated. The "transit" standards require approval by the board of adjustment pursuant to section 29-6.4(j). The principal land uses are sales and service activities, as shown in Table 29-3.1 (Permitted Use Table).

Table 29-2-8 M-C District Dimensional Standard Summary

Current Transit

Lot Standards

Minimum lot area

Minimum lot width at building line N/A N/A

Building Standards

Minimum depth of front yard 25 ft. 0 ft.

Maximum depth of front yard N/A 10 ft.

Minimum width of side yard - general 0 ft. 0 ft.

Minimum width of side yard - corner lot street side 15 ft. 10 ft.

Minimum width of side yard - adjacent to R district 20 ft. 20 ft.

Minimum depth of rear yard - general 0 ft. 0 ft.

Minimum depth of rear yard - adjacent to R district 20 ft. 20 ft.

Maximum height of primary building 45 ft. 55 ft.

This Table is a summary of selected standards; refer to Chapter 29-4.1 Dimension Standards, for additional regulations.

(ii) Illustration. The following diagram is a graphical depiction of the M-C district to be used for illustration purposes only.

(iii) Other standards. In addition to compliance with all other applicable regulations in this chapter, including without limitation the permitted use regulations in article 3 and the form and development regulations in article 4, development in the M-C district shall comply with the following when the applicant requests that the M-C "transit" standards apply:

(A) The property shall be located at an arterial street/arterial street or an arterial street/collector street intersection where current bus lines exist or future bus service is anticipated.

(B) All property frontages must have sidewalks constructed to city standards.

(C) The primary building must have at least one operable pedestrian door leading directly from the primary building onto a sidewalk. For primary buildings located on corner lots, the required pedestrian entrance may be located on the primary street façade or at the corner where the two (2) streets intersect.

(D) At least sixty-five (65) percent of the primary building frontage must be built no further than fifteen (15) feet from the front lot line.

(E) If the building is located on a corner lot, at least forty (40) percent of the secondary building frontage must be built no further than twenty (20) feet from the side lot line adjacent to the secondary street.

(F) At the applicant's option, minimum on-site parking requirements may be reduced up to thirty

(30) percent as described in section 29-4.3 (parking and loading).

(4) M-DT mixed use - downtown form district (inside regulating plan boundary).

(i) Purpose. The M-DT district is intended to encourage investment and reinvestment that reinforces the diverse pedestrian-oriented and walkable street environment in downtown Columbia within the regulating plan boundary. Form-based controls are tailored to ensure that the specific characters of different street frontages and subareas is preserved and strengthened, that automobile traffic does not interfere with the primarily pedestrian character of the area, and that areas adjacent to downtown are not adversely affected by buildings of dramatically different

scale or character. Form-based controls are tied to a specific regulating plan governing what building form and function can be built in different portions of downtown, how those buildings relate to the street, and where accessory parking areas may be located. Almost all uses are permitted except for low density residential and heavier industrial uses, as listed in Table 29-3.1 (Permitted Use Table).

Figure 29-2-9: M-DT Regulating Plan

Examples:

(ii) Additional regulations. Development and redevelopment in the M-DT district shall comply with those building form standards in section 29-4.2 (M-DT building form standards), and shall also comply with all other standards in this chapter unless those standards contain an exception for the M-DT district or the type of use, building, or development proposed.

(5) M-BP business/industrial park district.

(i) Purpose. The purpose of the M-BP district is to accommodate a mix of light industrial, institutional, and supporting commercial uses in close proximity through the use of innovative and flexible designs that buffer potential impacts of each use from surrounding uses and adjacent areas, and to promote environmentally sound and efficient use of land without the need for rezoning to a planned development district. A wide variety of commercial, research, development, office, distribution, processing, and institutional uses are permitted, as listed in Table 29-3.1 (Permitted Use Table).

Table 29-2-10 M-BP District Dimensional Standard Summary

Lot Standards

Minimum lot area N/A

Minimum lot width at building line N/A

Building Standards

Minimum depth front yard - from arterial and collector streets 25 ft.

Minimum depth front yard - from other streets 15 ft.

Minimum width of side yard - general 0 ft.

Minimum width of side yard - corner lot frontage on arterial or collector street 25 ft.

Minimum width of side yard - corner lot frontage on other streets 20 ft.

Minimum width of side yard - adjacent to residential district 20 ft.

Minimum depth of rear yard - general 0 ft.

Minimum depth of rear yard - adjacent to residential district 20 ft.

Maximum height of primary building 45 ft.

This Table is a summary of selected standards; refer to Chapter 29-4.1 Dimension Standards, for additional regulations.

(ii) Illustration. The following diagram is a graphical depiction of the M-BP district to be used for illustration purposes only.

(iii) Other standards. In addition to compliance with all other applicable regulations in this chapter, including without limitation the permitted use regulations in article 3 and the form and development regulations in article 4, development in the M-BP district shall comply with the following additional standards:

(A) In addition to the standards of section 29-4.4 (landscaping and screening), the following shall be required:

1) A permanent screen consisting of a masonry wall, wood fence, landscaping material, or combination thereof, at least eight (8) feet in height and, when a fence is used, not to exceed eight (8) feet in height, shall be required where a lot in this district abuts residentially zoned land. The required screening shall have an opacity of at least eighty

(80) percent year around and, if landscaping is used, the eighty (80) percent opacity and eight-foot minimum height shall be achieved within four (4) full growing seasons. In the event a masonry wall or wood fence is used, landscaping shall be placed between the wall or fence and the property line to form an ornamental screen. The required screening and landscaping shall be maintained in good order and not allowed to exist in a state of disrepair or death. If wood fencing is used, it shall be durable in nature and treated to prevent rapid deterioration.

2) All exterior storage areas shall be enclosed by a permanent screen at least eight (8) feet in height above the ground surface of the storage area. In the event that an eight (8) foot screen is inadequate to screen such an area, additional screening may be required in such a manner and of such materials as necessary to adequately screen such from public view. However, in no event shall the screen exceed twelve (12) feet in height, except for landscape materials. In no event shall the stored or stacked materials or finished products exceed the height of the required screening. The required screening shall have an opacity of at least eighty (80) percent year around, and if landscaping is used, the eighty (80) percent opacity shall be achieved within four (4) full growing seasons. When a solid wall, or any solid fence is used for screening, ornamental landscaping shall be placed between the fence and the adjacent property lines. The required screening shall be maintained in

good order and not allowed to exist in a state of disrepair or death. If wood fencing is used, it shall be durable in nature or treated to prevent rapid deterioration. Failure to maintain the required screening shall be considered a violation of this chapter.

3) Exterior storage areas shall have a permanently dust-free surface.

(B) The traffic circulation system shall provide for the safe, convenient and efficient movement of goods and people with a minimum of conflict between various modes of travel. The streets within the proposed development shall be public and within a public right-of-way, except private streets may be permitted under the following conditions:

1) The streets shall be designed, constructed, and maintained according to any applicable minimum city standards for private streets;

2) The streets will serve two (2) or more lots or property in multiple ownership; The private streets do not provide the only vehicular access to public streets from other property located outside the development;

3) The streets shall be located in designated common areas which shall be platted as a separate lot or lots;

4) A notation shall be written on the approved plan and recorded plat which reads: "All maintenance of the private streets shown on this plat shall be the responsibility of the owners association or abutting property owners. No private streets shall be dedicated to nor accepted by the city for maintenance until they have been improved to minimum city standards for public streets."; and 5) The street signs for private streets shall indicate "private street" so as to distinguish them from public streets.

(C) A system of pedestrian walkways and/or sidewalks meeting city standards shall be provided and shall connect with existing sidewalk systems or allow for future extensions to activity centers outside the development (i.e., schools, parks, shopping areas, etc.). Sidewalks shall be required along private streets as they would be required for public streets, except that no sidewalks shall be required on the side of a street without any buildings or driveways.

(D) The provisions of section 29-4.8 (signs) shall apply. Modification of such requirements including, but not limited to, sign area, height, placement and number of freestanding signs and on premise wall, canopy and awning signs may be granted by the board of adjustment in accordance with provisions of section 29-6.4(g) (sign plan approval).

(1) IG industrial - general district.

(i) Purpose. The IG district is intended to allow for manufacturing, warehousing, office activities, general industrial uses, and access to underground mining, resource, and storage activities, while protecting surrounding areas from any adverse impacts of those activities without the need for

rezoning to a planned development district. Development may be organized in a planned business or industrial park, or may be in individual buildings on individual lots in older parts of the city. The principal land uses are heavy commercial and industrial uses, as listed in Table 29-3.1 (Permitted Use Table).

Table 29-2-11 IG District Dimensional Standard Summary

Lot Standards

Minimum lot area N/A

Minimum lot width at building line N/A

Building Standards

Minimum depth front yard 25 ft.

Minimum width of side yard - general 0 ft.

Minimum width of side yard - adjacent to R district 20 ft.

Minimum depth of rear yard 10 ft.

Minimum depth of rear yard - if adjacent to R district 20 ft.

Maximum height of primary building N/A

This Table is a summary of selected standards; refer to Chapter 29-4.1 Dimension Standards, for additional regulations.

(ii) Illustration. The following diagram is a graphical depiction of the IG district to be used for illustration purposes only.

(A) No use shall be permitted or so operated as to produce or emit:

1) Smoke or particulate matter in violation of the standards of the ordinances of the city. 2) Dust, fly ash, radiation, gases, heat, glare, or other effects which are obviously injurious to humans at the property line.

3) Vibration or concussion perceptible without instruments at the property line. The noise level at any point along the property line shall not exceed:

Octave Band Decibels

0—75 CPS 55

75—1,200 CPS 40

1,200—4,800 CPS 25

Above 4,800 CPS 22

4) Industrial wastes of such quantity and nature as to overburden the public sewage disposal facilities or to cause odor and unsanitary effects beyond the property line.

(B) Access to all underground development activities such as commercial mining and storage shall be through property owned or controlled by the owners of the underground space within the IG district.

(C) Where applicable, underground space must have a building permit to develop a habitable underground areas and to qualify for a certificate of occupancy.

(D) The owners or operators of underground space shall file with the department a certificate by a registered professional engineer as to the structural integrity of the underground space. Such certificate may provide for exceptions or conditions for building permit approval. The certificate shall be valid for newly added or mined-out areas, if it is so described in the certificate and must have been dated within the past ten (10) years to be valid for its application to new areas.

(E)

Penetrations from underground space to the surface property above it shall be permitted without regard to the provisions of the IG zoning district, provided that such penetrations are for the purpose of connecting utilities or to contain safety, relief or life-support systems to the underground. All penetrations must be contained within a public easement to assure perpetuity and continued service to the underground development.

(2) A agricultural district.

(i) Purpose. This district is intended to provide for large-scale agricultural uses contained within the city, certain public uses, and facilities or activities best located in a more isolated area. The principal land use is an agricultural area or public facility. Only one principal dwelling and one second principal dwelling are allowed on each lot.

Table 29-2-12 A District Dimensional Standard Summary

Lot Standards

Minimum lot area 2.5 acres

Minimum lot width at building line 60 ft.

Building Standards

Minimum depth front yard 25 ft.

Minimum width of side yard 25 ft.

Minimum depth rear yard 25 ft.

Maximum height of primary building 35 ft.

This table is a summary of selected standards; refer to chapter 29-4.1 dimension standards, for additional regulations.

(ii) Illustration. The following diagram is a graphical depiction of the A district to be used for illustration purposes only.

(iii) Other standards. In addition to compliance with all other applicable regulations in this chapter, including without limitation the permitted use regulations in article 3 and the form and development regulations in article 4, development in the A district shall comply with the following requirement:

(A) No more than two (2) contiguous residential lots may be created in this district. The creation of additional lots requires rezoning to the R-1 district and approval of a subdivision.

(3) O open space district.

(i) Purpose. The O district is intended to ensure and regulate the use of publicly owned parks, open space, and nature reserves, as well as designated private open spaces within master planned developments or subdivisions with the consent of the property owner.

Table 29-2-13 O District Dimensional Standard Summary

Lot Standards

Minimum lot area 2.5 acres

Minimum lot area for Private Open Space 7,000 sq. ft.

Minimum lot width at building line 60 ft.

Building Standards

Minimum depth front building setback 25 ft.

Minimum width of side building setback 25 ft.

Minimum depth of rear building setback 25 ft.

Maximum height of primary building 35 ft.

This table is a summary of selected standards; refer to chapter 29-4.1 dimension standards, for additional regulations.

(ii) Illustration. The following diagram is a graphical depiction of the O district to be used for illustration purposes only.

(4) PD planned development.

(i) Purpose. The purpose of the planned development (PD) district is to allow for innovation and flexibility in design, to encourage creative mixes of complementary uses, and to promote environmentally sound and efficient use of land. The major objectives of a planned development are:

(A) To allow for a mixture of housing types and densities located in proximity to each other.

(B) To allow for mixtures of residential and non-residential uses located in proximity to each other when any potential adverse impacts have been minimized, mitigated, screened or buffered.

(C) To provide for more usable and suitably-located common open space and amenities, including but not limited to clustered patterns of development and open space than would otherwise be provided under the city's base zone districts.

(D)

To require that planned developments provide to the city amenities or benefits that help achieve the goals of the Columbia Imagined comprehensive plan (as amended) and that are not otherwise required by the base zoning districts in return for the added flexibility in uses and design offered by the PD district.

(E) To ensure that approved planned developments are efficient to administer over time.

(ii) Eligibility. Any property in the city, except property located in the M-DT zone district, may be rezoned to a PD zone district.

(iii) Permitted uses.

(A) An application for rezoning to a PD district shall identify which of the uses (permitted, conditional, accessory, conditional accessory, or temporary), listed in Table 29-3.1 (Permitted Use Table), will be permitted allowed uses in all or specific portions of the PD district.

(B) The application may include some of the general uses listed in Table 29-3.1 and state that some of the specific uses included in the definition will not be included in the PD, or that some of the included uses will be subject to different or additional use-specific standards than those listed in section 29-3.3 (use-specific standards). If not modified by the PD application, all of the use-specific standards listed in section 29-3.3 will apply.

(C) The application for rezoning to a PD district may not include any use that is not listed in Table 29-3.1 (Permitted Use Table). Uses not listed in Table 29-3.1 are only available through an amendment to that table approved by council in a separate action.

(iv) Development and form standards.

(A) The PD application may include variations in any development or form standard in chapter 29, article 4 that would otherwise be applicable in the PD district. Unless varied by the terms of the PD application, the provisions of chapter 29, article 4 (development and form standards) otherwise applicable to the same type of development will apply.

(B) If the PD application would permit buildings within one hundred (100) feet of the edges of the PD property that are more than one story taller than the tallest building permitted in the adjacent zone district, the PD application shall include provisions to mitigate, screen, or buffer the visual, lighting, and traffic impacts of that taller development on the adjacent zoning district.

(C) If the PD application includes non-residential uses within one hundred (100) feet of the edges of the PD property abutting any R-1, R-2, R-MF, or R-MH district, the PD shall include provisions to mitigate the traffic, lighting, noise, or hour-of-operation impacts of that nonresidential development on the adjacent R-1, R-2, R-MF, or R-MH district.

(v) Procedures for approval and administration. The procedures for approval of a zoning map change to a PD district, are set forth in section 29-6.4(n)(2).

Official source: City of Columbia official Code of Ordinances (online): look up Sec. 29-2.2

Text from Supplement 139 (September 3, 2026).

Last checked November 1, 2026. The city's official copy controls; this page is a reading copy, not legal advice.