Sec. 656.307. - High Density Residential Category.

Primary uses in this category include multi-family residential developments at gross densities of 20 to 60 dwelling units per acre. Because of the traffic and other infrastructure impacts such uses generate, high density residential areas must be located in close proximity to an arterial road and be supplied with full urban services in order for development to occur. High density residential areas shall be sited in or adjacent to mass transit corridors and stations. Certain nonresidential uses which may also be permitted in this category include supporting commercial recreational and public buildings and facilities at appropriate locations, subject to the criteria set forth in this Section. The following primary and secondary zoning districts may be considered in the High Density Residential Category depicted on the Future Land Use Maps series of the Comprehensive Plan. A. Primary zoning districts. The primary zoning districts shall include the following: (1) Residential Medium Density- D (RMD- D); Section 656.306 . (2) Residential High Density-A (RHD-A); Section 656.307 . (3) Residential High Density-B (RHD-B); Section 656.307 . Generally, multiple-family dwellings and mixed use developments will be the predominant land use in this category. Certain supporting open space, recreation use, community facilities and utilities may also be permitted, as are conservation areas. I. Residential Medium Density-D (RMD-D) District. The permitted uses and structures, accessory uses and structures, permissible uses by exception, minimum lot and yard requirements, maximum lot coverage, impervious surface ratio, and height of buildings and structures shall be as provided in Section 656.306 . II. Residential High Density-A (RHD-A) and Residential High Density-B (RHD-B) Districts. (a) Permitted uses and structures. (1) Multiple-family dwellings. (2) Commercial neighborhood retail and service establishments structurally integrated with a multiple-family dwelling not exceeding 25% of the total floor area. (3) Professional office uses structurally integrated with a multiple-family dwelling not exceeding 25% of the total floor area. (4) Community residential homes of six or fewer residents meeting the performance standards and development criteria set forth in Part 4. (5) Housing for the elderly. (6) Essential services, including water, sewer, gas, telephone, radio, television and electric, meeting the performance standards and development criteria set forth in Part 4. (7) Churches, including a rectory or similar use, meeting the performance standards and development criteria set forth in Part 4. (8) Parks, playgrounds and playfields or recreational or community structures meeting the performance standards and development criteria set forth in Part 4. (9) Bed and breakfast establishments meeting the performance standards and development criteria set forth in Part 4. (10) Home occupations meeting the performance standards and development criteria set forth in Part 4. (11) Family day care homes meeting the performance and development criteria set forth in Part 4. (b) Permitted accessory uses and structures. (1) See Section 656.403 . (2) In connection with multiple-family dwellings, including housing for the elderly, coin-operated laundromats and other vending machine facilities, day care centers, establishments for sale of convenience goods, personal and professional service establishments; provided, however, that these establishments shall be designed and scaled to meet only the requirements of the occupants of these multiple-family dwellings or housing for the elderly and their guests with no signs or other external evidence of the existence of these establishments. (c) Permissible uses by exception. (1) Cemeteries and mausoleums but not funeral homes or mortuaries. (2) Elementary and secondary schools meeting the performance standards and development criteria set forth in Part 4. (3) Essential services, including water, sewer, gas, telephone, radio, television and electric, meeting the performance standards and development criteria set forth in Part 4. (4) Nursing homes. (5) Residential treatment facilities. (6) Private clubs. (7) Day care centers meeting the performances standards and development criteria set forth in Part 4. (8) Churches, including a rectory or similar use, meeting the performance standards and development criteria set forth in Part 4. (9) Home occupations meeting the performance standards and development criteria set forth in Part 4. (10) Community residential homes of seven to 14 residents meeting the performance standards and development criteria set forth in Part 4. (11) Boarding houses. (12) Supporting Commercial Retail Sales and Service Establishments or Supporting Professional Offices uses in conjunction with multi-family. (d) Minimum lot requirements (width and area). For all uses, except as otherwise required for certain uses, the minimum lot requirements are as follows: (1) RHD-A—1,100 square feet for each family unit, not to exceed 32 units per acre.(2) RHD-B—735 square feet for each family unit, not to exceed 60 units per acre. (e) Maximum lot coverage by all buildings and structures as listed below. Impervious surface ratios as required by Section 654.129 . (1) RHD-A—60 percent. (2) RHD-B District—80 percent. (f) Minimum yard requirements. (1) Multiple-family dwellings on individual lot in RHD-A District: (i) Front—20 feet. (ii) Side—Ten feet. (iii) Rear—20 feet. (2) Multiple-family dwellings with more than one principal structure on the lot in RHD-A District: (i) Front—20 feet. (ii) Side—20 feet. (iii) Rear—20 feet. (3) Multiple-family dwellings on individual lot or with more than one principal structure on the lot in RHD-B District: (i) Permitted uses and structures: (A) Front—25 feet. (B) Side and rear—40 feet. (ii) Accessory use structures used in conjunction with a permitted use: (A) Front—Accessory use structures shall not be permitted in front yards as they are established by the location of the principal use structures. (B) Side and rear—5 feet. (4) All other uses: (i) Front—10 feet. (ii) Side—Ten feet. (iii) Rear—20 feet. (g) Height of structures. (1) RHD-A District—Maximum height shall be 45 feet; provided, however, that the height may be unlimited where all required yards are increased by one foot for each one foot of building height or fraction thereof in excess of 45 feet. (2) RHD-B District—Maximum height shall be 60 feet; provided, however, that the height may be unlimited where all required yards are increased by one foot for each three feet of building height or fraction thereof in excess of 60 feet. (3) All other uses and accessory use structures—See Section 656.403 . B. Secondary zoning districts. The following secondary zoning districts may be permitted in the High Density Residential Category as depicted on the Future Land Use Maps of the Comprehensive Plan, subject to the district regulations for same. (1) Commercial Office (CO); Section 656.311 . (2) Commercial Residential and Office (CRO); Section 656.311 . (3) Commercial Neighborhood (CN); Section 656.312 . (4) Commercial Community/General-1 (CCG-1); Section 656.313 . (5) Public Building and Facilities-1 (PBF-1); Section 656.332 . (6) Public Building and Facilities-2 (PBF-2); Section 656.332 . (7) Conservation (CSV); Section 656.333 . (8) Planned Unit Development (PUD); Section 656.340 . The aforementioned secondary zoning districts may be permitted provided that the supplemental criteria and standards for same specified in Subpart G herein are met. (Ord. 91-59-148, § 1; Ord. 93-1760-1171, § 3; Ord. 95-868-763, § 1; Ord. 2008-969-E, § 1; Ord. 2019-375-E , § 1)