Ontario, CA Zoning Overlays & Bonuses: Density Bonus Law (2026)

65915. (a) (1) When an applicant seeks a density bonus for a housing development within, or for the donation of land for housing within, the jurisdiction of a city, county, or city and county, that local government shall comply with this section. A city, county, or city and county shall adopt an ordinance that specifies how compliance with this section will be implemented. Except as otherwise provided in subdivision (s), failure to adopt an ordinance shall not relieve a city, county, or city and county from complying with this section. (2) A local government shall not condition the submission, review, or approval of an application pursuant to this chapter on the preparation of an additional report or study that is not otherwise required by state law, including this section. This subdivision does not prohibit a local government from requiring an applicant to provide reasonable documentation to establish eligibility for a requested density bonus, as described in subdivision (b), and parking ratios, as described in subdivision (p). (3) In order to provide for the expeditious processing of a density bonus application, the local government shall do all of the following: (A) Adopt procedures and timelines for processing a density bonus application. (B) Provide a list of all documents and information required to be submitted with the density bonus application in order for the density bonus application to be deemed complete. This list shall be consistent with this chapter. (C) Notify the applicant for a density bonus whether the application is complete in a manner consistent with the timelines specified in Section 65943. (D) (i) If the local government notifies the applicant that the application is deemed complete pursuant to subparagraph (C), provide the applicant with a determination as to the following matters: (I) The amount of density bonus, calculated pursuant to subdivision (f), for which the applicant is eligible. (II) If the applicant requests a parking ratio pursuant to subdivision (p), the parking ratio for which the applicant is eligible. (III) If the applicant requests incentives or concessions pursuant to subdivision (d) or waivers or reductions of development standards pursuant to subdivision (e), whether the applicant has provided adequate information for the local government to make a determination as to those incentives, concessions, waivers, or reductions of development standards. (ii) Any determination required by this subparagraph shall be based on the development project at the time the application is deemed complete. The local government shall adjust the amount of density bonus and parking ratios awarded pursuant to this section based on any changes to the project during the course of development. (b) (1) A city, county, or city and county shall grant one density bonus, the amount of which shall be as specified in subdivision (f), and, if requested by the applicant and consistent with the applicable requirements of this section, incentives or concessions, as described in subdivision (d), waivers or reductions of development standards, as described in subdivision (e), and parking ratios, as described in subdivision (p), if an applicant for a housing development seeks and agrees to construct a housing development, excluding any units permitted by the density bonus awarded pursuant to this section, that will contain at least any one of the following: (A) Ten percent of the total units of a housing development, including a shared housing building development, for rental or sale to lower income households, as defined in Section 50079.5 of the Health and Safety Code. (B) Five percent of the total units of a housing development, including a shared housing building development, for rental or sale to very low income households, as defined in Section 50105 of the Health and Safety Code. (C) A senior citizen housing development, as defined in Sections 51.3 and 51.12 of the Civil Code, or a mobilehome park that limits resid