California Density Bonus and State Housing Laws — Developer FAQs

A developer-focused guide to California density bonus law, streamlined housing approvals, by-right multifamily entitlements, and state housing legislation that can unlock more units beyond local zoning—statewide.

1. What Is California’s State Density Bonus Law?

California’s State Density Bonus Law allows qualifying multifamily housing projects to exceed local zoning density limits. In exchange for including affordable units at specified income levels, developers receive a density bonus (up to 50% above the base allowable density—or up to 80% for 100% affordable projects under AB 1763), along with incentives, concessions, and waivers from development standards that would otherwise physically preclude construction of the project at the allowed density and affordability package.

The law is designed to remove regulatory barriers that prevent the construction of housing—particularly affordable housing—by ensuring that local development standards do not make approved projects infeasible.

• Density bonus — Up to 50% increase over the maximum allowable residential density (up to 80% for 100% affordable projects)
• Incentives and concessions — Reductions in site development standards (setbacks, height, open space, etc.) that result in identifiable, financially sufficient cost reductions
• Waivers and reductions — Required when a development standard would physically preclude construction at the permitted density and affordability

Authority: AB 1668 (1979), as amended → California Government Code §65915

2. Can State Law Require Waivers from Local Development Standards (Like FAR Constraints)?

Yes. Under Government Code §65915, local agencies are required to grant waivers or reductions of development standards that would physically preclude the construction of a project at the density, affordability mix, and number of incentives/concessions permitted under the density bonus law.

This means that if a local standard—such as a Floor Area Ratio (FAR) cap, height limit, setback requirement, or lot coverage restriction—would prevent the developer from building the number of units allowed by the density bonus, the jurisdiction must waive or reduce that standard. The agency cannot deny the waiver unless it can make specific written findings that the waiver would have a specific, adverse impact on public health or safety and there is no feasible alternative to mitigate that impact.

• FAR limits — Must be waived if they preclude the approved density
• Height restrictions — Subject to waiver under the same standard
• Setback and open space requirements — Same framework applies
• Parking standards — Reduced parking ratios are also available under the density bonus statute

Authority: AB 1668 (1979), as amended → California Government Code §65915

3. What Is the Housing Accountability Act (HAA)?

The Housing Accountability Act (HAA) limits a local jurisdiction’s ability to deny, reduce the density of, or impose conditions that render infeasible a housing development project that complies with applicable, objective general plan, zoning, and subdivision standards and criteria in effect at the time the application is deemed complete.

In practice, this means that if a proposed housing project meets the local rules on the books, the city or county cannot reject it or shrink it based on subjective concerns such as neighborhood character, community opposition, or discretionary aesthetic preferences. The jurisdiction must make specific written findings, supported by a preponderance of the evidence, that the project would have a specific, adverse impact on public health or safety.

• Protects compliant projects — Jurisdictions cannot deny or downsize projects that meet objective standards
• Shifts the burden — The agency bears the burden of proof when proposing to deny or condition a project
• Strengthened penalties — Courts can impose fines and multipliers for violations, including attorney’s fees

Authority: SB 167 (2017) + AB 678 (2017) → California Government Code §65589.5

4. What Protections Does SB 330 Provide?

SB 330, the Housing Crisis Act of 2019, restricts local jurisdictions from taking actions that reduce housing capacity and adds procedural protections for housing development applications. It applies statewide and is set to remain in effect through January 1, 2030.

The law prevents jurisdictions from downzoning, imposing moratoriums on housing, or reducing the intensity or density of residential land uses below what was allowed when SB 330 took effect. It also establishes a “preliminary application” process that locks in the standards applicable to a project early in the entitlement process, protecting developers from rule changes during review.

• Anti-downzoning — Prohibits reductions to residential zoning capacity or development intensity
• No new moratoriums — Bars new limitations on housing approvals or permits
• Preliminary application vesting — Locks in applicable standards at the time of the preliminary application, even if rules change later
• Streamlined hearing limits — Caps the number of hearings a jurisdiction can require for compliant projects
• No-net-loss protections — Jurisdictions cannot approve projects that would result in fewer residential units than currently exist on the site without replacing the lost units

Authority: SB 330 (2019) → California Government Code §66300

5. What Is SB 35 / SB 423 Streamlining?

SB 35 (2017), as amended and extended by SB 423 (2023), creates a ministerial (non-discretionary) approval pathway for qualifying multifamily housing projects. Under this pathway, eligible projects are approved without discretionary review, public hearings, or CEQA analysis—significantly compressing the entitlement timeline.

To qualify, a project must be located in a jurisdiction that has not met its Regional Housing Needs Allocation (RHNA) targets, include a specified percentage of affordable units, pay prevailing wages, and meet other objective standards. SB 423 extended and expanded the program, making it permanent and broadening eligibility criteria.

• Ministerial approval — No discretionary review, no public hearings, no CEQA
• Affordability requirement — Must include affordable units at specified levels depending on the jurisdiction’s RHNA shortfall
• Labor standards — Prevailing wage and, for larger projects, skilled and trained workforce requirements
• Tight review timelines — Jurisdictions must complete review within 60 or 90 days depending on project size

Authority: SB 35 (2017), amended by SB 423 (2023) → California Government Code §65913.4

6. How Does AB 2011 Create a “By-Right” Path?

AB 2011, the Affordable Housing and High Road Jobs Act (2022), establishes a by-right, ministerial approval pathway for qualifying housing projects on eligible commercial and office-zoned sites. The law is designed to convert underutilized commercial corridors into housing opportunities without requiring a rezone or discretionary review.

Projects must meet affordability thresholds, prevailing wage and apprenticeship requirements, and objective development standards. There are two tiers: one for 100% affordable projects and one for mixed-income projects, each with different site eligibility and affordability requirements.

• By-right on commercial sites — No rezone, no discretionary hearing, no CEQA required
• Two-tier structure — Separate pathways for 100% affordable and mixed-income projects
• High road labor standards — Prevailing wage, apprenticeship, and healthcare requirements
• Site eligibility criteria — Must be in commercially zoned areas, with exclusions for sensitive sites (coastal zone, wetlands, hazardous areas, etc.)

Authority: AB 2011 (2022) → California Government Code §65912.100

7. What Does SB 4 Allow on Faith-Based and Higher Education Lands?

SB 4, the Affordable Housing on Faith and Higher Education Lands Act (2023), enables qualifying affordable housing to be developed as a use by right on land owned by religious institutions and independent institutions of higher education. The law creates a streamlined, ministerial approval pathway for these projects.

The legislation recognizes that many faith-based and educational organizations own underutilized land in established neighborhoods with existing infrastructure and services. By removing discretionary review barriers, SB 4 allows these institutions to partner with affordable housing developers to address the housing crisis without lengthy entitlement processes.

• Use by right — Ministerial approval with no discretionary review or CEQA
• Affordable housing requirement — Must include a significant affordable component
• Eligible property owners — Religious institutions and qualifying independent colleges and universities
• Development standards — Subject to objective local standards, with density aligned to the greater of existing zoning or the jurisdiction’s default density

Authority: SB 4 (2023) → California Government Code §65913.16

8. What Is SB 684?

SB 684 (2023) expands ministerial subdivision and approval tools for “missing middle” scale housing—smaller multifamily projects such as duplexes, triplexes, fourplexes, and small apartment buildings that fill the gap between single-family homes and large apartment complexes.

The law streamlines the subdivision and approval process for these project types, reducing the time and cost associated with developing smaller-scale infill housing. It builds on California’s existing framework for ministerial approvals and extends those tools to a broader range of housing typologies.

• Ministerial subdivision — Streamlined approval for qualifying small-scale multifamily subdivisions
• Missing middle focus — Targets the 2-to-10 unit range that is often underbuilt due to regulatory barriers
• Infill-oriented — Applies to sites within urbanized areas with existing infrastructure
• Complements existing tools — Works alongside SB 9, ADU law, and density bonus to expand options for smaller developers

Authority: SB 684 (2023) → California Government Code §65852.28, §65913.4.5, §66499.41

9. How Does AB 2097 Eliminate Parking Minimums?

AB 2097 (2022) prohibits local jurisdictions from imposing minimum automobile parking requirements on any residential, commercial, or other development project located within one-half mile of a major transit stop. The law applies statewide and removes one of the most significant cost and design barriers to infill housing development.

By eliminating parking minimums near transit, AB 2097 allows developers to right-size parking based on actual demand rather than outdated formulas. This can significantly reduce construction costs (structured parking can cost $40,000–$80,000+ per space), increase the buildable area available for housing units, and support transit-oriented development patterns.

• No parking minimums within ½ mile of major transit — Applies to residential, commercial, and mixed-use projects
• Cost savings — Eliminates the need to build expensive structured parking that may sit underutilized
• Design flexibility — Frees up floor area and site coverage for habitable space
• Does not prohibit parking — Developers can still provide parking voluntarily based on market demand

Authority: AB 2097 (2022) → California Government Code §65863.2

10. Can ADUs Be Sold Separately (Condo Exit)?

Yes—but only where the local jurisdiction has opted in. AB 1033 (2023–2024) authorizes local agencies to adopt ordinances allowing Accessory Dwelling Units (ADUs) to be sold separately from the primary residence when the property is legally subdivided. This creates a “condo exit” strategy for ADU developers, enabling individual unit sales rather than requiring the entire property to be held as a rental.

The law opens a new pathway for small-scale developers and homeowners to build ADUs as for-sale product, increasing the financial viability of ADU construction and expanding homeownership opportunities—particularly in high-cost markets where detached single-family homes are out of reach for many buyers. However, AB 1033 is not self-executing—each jurisdiction must adopt a local ordinance to enable ADU condo sales.

• Separate sale permitted where adopted — ADUs can be sold independently as condominiums when the local jurisdiction has opted in and the property is properly subdivided
• Local opt-in required — AB 1033 authorizes but does not mandate—each city or county must adopt an enabling ordinance
• Legal subdivision required — The property must go through a subdivision or condominium map process
• Homeownership pathway — Creates attainable entry-level ownership opportunities
• Developer flexibility — Supports both build-to-rent and build-to-sell strategies for ADU projects

Authority: AB 1033 (2023–2024) → California Government Code §65852.2(a)(10)

11. Can Multifamily Properties Add Up to 8 Detached ADUs?

Yes, with important limitations. SB 1211 (2023–2024) expands the number of detached ADUs that can be added to existing multifamily properties from 2 to up to 8 units. This significantly increases the development potential of older multifamily parcels, particularly garden-style apartment complexes with underutilized open space or surface parking areas.

The law is designed to encourage incremental density on multifamily sites without requiring a full redevelopment. Detached ADUs can be constructed on the same lot as an existing multifamily building, providing additional rental units with relatively low construction costs and minimal impact on existing residents.

• Up to 8 detached ADUs on existing multifamily — Applies only to lots with an existing multifamily dwelling; for proposed (new) multifamily, the cap remains at 2 detached ADUs
• Cannot exceed existing unit count — The number of ADUs allowed cannot exceed the number of existing units on the lot (e.g., a 5-unit property can add up to 5 ADUs, not 8)
• Detached structures only — The 8-unit provision applies to detached ADUs; internal conversions within existing buildings are governed separately (up to 25% of existing units)
• Incremental density — Adds units without demolishing or redeveloping existing buildings
• Ministerial approval — ADUs are approved ministerially under state law, with no discretionary review

Authority: SB 1211 (2023–2024) → California Government Code §66323(a)(4)(A)

12. Do These Laws Apply Outside San Diego?

Yes. All of the laws discussed in this guide are California state statutes and apply statewide to every city and county in California. They are not local programs—they are state-mandated requirements that local jurisdictions must implement and comply with.

That said, eligibility and applicability vary by jurisdiction. Some programs (such as SB 35/SB 423 streamlining) depend on whether a city has met its Regional Housing Needs Allocation (RHNA) targets. Others (such as AB 2097 parking elimination) depend on proximity to major transit stops. And some (such as density bonus waivers) depend on the specific development standards in effect in each jurisdiction.

• Statewide application — These are state laws, not local programs
• Local implementation varies — Each jurisdiction may have different baseline zoning, overlay zones, and local programs that interact with state law
• Eligibility is site-specific — Transit proximity, RHNA compliance, and zoning designations all affect which tools are available for a given project
• Local expertise matters — Understanding how state tools interact with local regulations is essential for maximizing yield and minimizing entitlement risk