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City of Portsmouth Zoning Ordinance Article I1. — Zoning Districts Sec. 40.2 -206 — Historic Districts District - Specific Standards 11/6/2020 The HLB sub - district is generally intended for commercial uses with, along with limited residential, and institutional uses. Residential and nonresidential uses may be combined within a building in this sub - district, provided: (i) Buildings with one (1) bedroom include at least 400 square feet of useable floor area solely for residential purposes; (ii) Buildings with two (2) bedrooms include at least 700 square feet of useable floor area solely for residential purposes; and (iii)Buildings with three (3) bedrooms include at least 800 square feet of useable floor area solely for residential purposes. (G)District- Specific Standards The following district - specific standards shall apply to new uses and redevelopment within the historic districts: (1) Off - Street Parking (a) Off - street parking spaces shall be provided in accordance with Table 40.2 - 301(1), Minimum Off - Street Parking Standards. (b) Parking requirements for two (2) or more uses may be provided in a common parking area, provided that all uses being served by the common parking area are under the common ownership. (c) Parking lots of four (4) or more spaces shall be paved with cobblestone or other approved material which enhances the aesthetic quality of the historic area. (2) Exterior Lighting Lighting shall be provided in accordance with the standards in Sec.40.2 -306 Exterior Lighting, and no exterior lighting shall exceed a height of nine (9) feet from the adjacent grade. (3) Signage (a) New signage and changes to existing signage require approval of a Certificate of Appropriateness (See Sec. 40.2 -536 Certificates of Appropriateness (COA)). (b) Any authorized changes shall be made within two (2) years of approval. (c) Signage that fails to comply with the applicable standards in this Ordinance shall be removed, at the owner's expense, within six (6) months of notice provided by the City. (4) Required Landscaping All private areas not covered with building or surface treatment shall be landscaped with plantings, grass, pedestrian walks or similar features, in accordance with Sec. 40.2 -304 Landscaping and Screening and shall be maintained in good condition. (5) Historic Markers Page 23