Ordinance amending the Planning Code to rezone all Residential, One Family (RH-1) zoning districts, except for Residential, One Family, Detached (RH-1(D)) districts, to Residential, Two Family (RH-2) zoning districts; to rezone the RH-1(D) districts to a new class of residential district called Residential, Two Family, Detached (RH-2(D)) districts; and to provide a density limit exception to permit up to four dwelling units per lot, and up to six dwelling units per lot in Corner Lots, in all RH (Residential, House) zoning districts, subject to certain requirements, including among others the replacement of protected units; amending the Administrative Code to require new dwelling units constructed pursuant to the density limit exception to be subject to the rent increase limitations of the Rent Ordinance; amending the Subdivision Code to authorize a subdivider that is constructing new dwelling units pursuant to the density exception to submit an application for condominium conversion or a condominium map that includes the existing dwelling units and the new dwelling units that constitute the project; affirming the Planning Department’s determination under the California Environmental Quality Act; and making findings of consistency with the General Plan, and the eight priority policies of Planning Code, Section 101.1, and findings of public necessity, convenience, and welfare under Planning Code, Section 302.