AB 660 amends the Housing Accountability Act to narrow the grounds on which local governments can disapprove or condition housing projects—especially projects serving very low‑, low‑, or moderate‑income households and emergency shelters—and to streamline post‑entitlement permitting. The bill clarifies that local agencies must make written findings supported by a preponderance of the evidence to deny or materially condition projects, tightens what qualifies as a “specific, adverse impact” on public health or safety, and strengthens vesting and objective‑standards protections for applicants.
The measure also expands and clarifies the “builder’s remedy” pathway: it defines how maximum density is calculated (including a transit‑area boost), limits local imposition of requirements on builder’s remedy projects, adds extra density bonus incentives, and creates stiffer enforcement tools—mandatory fines per unit, fee‑forfeiture rules, and court powers to compel approvals. For planners, developers, and local counsel, AB 660 rebalances procedural risk and reallocates the burden of proof to local agencies in many post‑entitlement disputes.
At a Glance
What It Does
The bill restricts local agencies from disapproving or conditioning affordable housing and emergency shelters unless they make specified written findings supported by a preponderance of the evidence; it narrows acceptable bases for denial and defines ‘specific, adverse impact’ narrowly. It also codifies expanded builder’s remedy rules (density calculations, limitations on additional local requirements, and extra density bonuses) and tightens vesting/ordinance‑change protections for projects with preliminary applications.
Who It Affects
Local governments and their planning departments face higher litigation and evidentiary burdens; developers of affordable, mixed‑income, and large infill projects get clearer vesting and stronger remedies; housing organizations and applicants gain expanded standing to sue and potential fee awards. Courts will see more enforcement actions tied to post‑entitlement decisions.
Why It Matters
AB 660 shifts the procedural advantage toward project applicants by clarifying objective standards, imposing firm timelines for local responses, and attaching mandatory financial penalties when agencies violate the statute—tools meant to accelerate approvals and discourage delay tactics that reduce housing supply.
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What This Bill Actually Does
AB 660 rewrites how post‑entitlement decisions are judged under California’s Housing Accountability Act. When a project serves very low, low, or moderate‑income households—or is an emergency shelter—the local agency may not deny the project or impose conditions that make it infeasible unless it enters written findings, backed by a preponderance of the evidence, showing one of a narrow set of allowable reasons.
The bill sharply limits what counts as a ‘specific, adverse impact’ on public health or safety (it must be significant, quantifiable, direct, and unavoidable and tied to objective written standards) and forbids using mere zoning inconsistency as a basis for denial.
For projects qualifying as a builder’s remedy, AB 660 prescribes which objective development standards may apply and prevents agencies from layering extra requirements or fees solely because a project is a builder’s remedy. The statute lays out how to compute allowable density (the greatest of several formulas tied to the jurisdiction’s minimum densities, a three‑times rule, or the housing element), and it allows an additional density uplift of up to 35 units per acre in certain transit‑rich or prioritized census tracts.
Builder’s remedy projects also receive extra incentives or concessions if they seek density bonuses.The bill tightens vesting and vesting‑related definitions: for many purposes a project is ‘deemed complete’ under existing preliminary application rules through January 1, 2030, and ‘objective’ standards are defined similarly on a temporary basis. AB 660 preserves the state’s CEQA obligations and allows changes to apply post‑vesting in limited, specified circumstances—e.g., later fee increases indexed to a published cost index, mitigation necessary to address a specific, adverse health or safety impact, CEQA‑driven mitigation, or when construction has not begun within fixed windows (2.5 years, or 3.5 years for affordable projects).
It also treats substantial project revisions (20%+ units or square footage) as a trigger to consider newer standards.Enforcement is more muscular. The statute gives applicants, prospective residents, and housing organizations standing to sue and requires courts to compel compliance within 60 days when certain violations are proven.
Minimum fines are set (at $10,000 per unit) for agencies that fail to comply with judgments, with multipliers—up to five times—for bad faith or repeat violations; fines must be spent on newly constructed housing for lower‑income households or revert to the state if unspent in five years. The bill contains several sunset dates (2029–2034 windows) for temporary definitions and special procedural rules, which creates a short‑term regime for many of the tighter protections and exceptions.
The Five Things You Need to Know
The local agency bears the burden of proof by a preponderance of the evidence when it disapproves or conditions affordable housing or an emergency shelter; mere inconsistency with zoning or a general plan is explicitly excluded as a valid ‘specific, adverse impact.’, Courts must compel compliance within 60 days and may order approval where an agency acted in bad faith; minimum statutory fines are $10,000 per housing unit if an agency fails to comply, and courts can multiply that fine by five for bad faith and further for repeat violations.
A builder’s remedy project’s allowable density is the greatest of: (1) 150% of the jurisdiction’s minimum density from Gov’t Code §65583.2, (2) three times the density allowed by general plan/zoning/state law, or (3) the housing element density—plus up to 35 additional units per acre in specified transit‑or opportunity‑area sites.
Local agencies must provide written documentation explaining asserted inconsistencies within 30 days for projects with 150 or fewer units and within 60 days for larger projects, otherwise the project is deemed consistent with the cited provisions.
Several key definitions and protections are temporary: the ‘deemed complete’ and ‘objective’ definitions are effective until January 1, 2030, certain CEQA review challenges and related protections lapse on January 1, 2031, and the preliminary‑application vesting rules become inoperative on January 1, 2034.
Section-by-Section Breakdown
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Required written findings and narrow public‑health/safety standard
Subdivision (d) governs when a jurisdiction may disapprove or impose feasibility‑ending conditions on housing for lower incomes or emergency shelters. Local agencies must make written findings, supported by a preponderance of the evidence in the administrative record, tying the denial to one of the statute’s narrow bases—housing element compliance, a specific, adverse public health or safety impact that cannot be mitigated without rendering the housing unaffordable, a legal mandate, agricultural/resource constraints, or lack of an up‑to‑date housing element. Practically, this forces staff reports and council findings to be fact‑based and tied to objective, pre‑existing standards rather than generalized policy objections.
Builder’s remedy mechanics, limits on local requirements, and extra bonuses
Paragraph (6) of subdivision (f) lays out what a builder’s remedy project may be required to meet and what it may not. It restricts local agencies to objective standards that would have applied on a hypothetically permissive site, bars imposition of any requirements that render a project infeasible, and shifts the burden to the agency to prove otherwise. It also prevents special processes, additional approvals, or extra fees from being imposed because a project used the builder’s remedy, and it guarantees density bonus treatment and extra incentives for qualifying projects. For developers this reduces discretionary hurdles; for jurisdictions it removes many ‘lever arms’ previously used to negotiate on local terms.
Key definitions: deemed complete, objective, builder’s remedy, and temporary sunsets
Subdivision (h) defines critical terms developers and agencies rely on: ‘deemed complete’ (linked to preliminary application procedures) and ‘objective’ are defined in a way that limits subjective review until January 1, 2030; the builder’s remedy is precisely defined (including the density formulas and location restrictions such as proximity to transit and non‑adjacency to heavy industrial uses); and ‘deemed complete’ timing rules place the burden on the local agency to prove incompleteness. These timed definitions create a temporary heightened protection window for projects that enter the pipeline before the sunset dates.
Private enforcement, court relief, and financial penalties
Subdivision (k) expands standing (applicants, prospective residents, housing orgs) and prescribes remedies: courts must order compliance within 60 days when statutory violations are proved, may approve projects where agencies acted in bad faith, and retain jurisdiction to enforce orders. If agencies fail to comply, courts impose minimum per‑unit fines ($10,000/unit), require deposits into a local housing trust fund (or the state Building Homes and Jobs Trust Fund), and set expenditure windows with reversion to the state. Bad faith and repeat violations trigger multipliers that substantially increase fiscal exposure for local governments.
Which post‑application ordinances can apply and when vesting ends
Subdivision (o) restates the core vesting rule: a project is subject only to ordinances and standards in effect when the preliminary application was submitted. It enumerates limited exceptions allowing later rules to apply—automatic fee indexation, mitigation necessary for a demonstrated specific, adverse health/safety impact, CEQA‑required measures, failure to commence construction within fixed windows (2.5 years or 3.5 for affordable projects), and major project revisions (20%+ change). It also confirms vesting for many application files through 2030 but makes the rule inoperative by 2034, creating a finite period during which applicants enjoy strong protections.
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Every bill creates winners and losers. Here's who stands to gain and who bears the cost.
Who Benefits
- Very low, low, and moderate‑income household applicants—projects serving these groups gain stronger protections against discretionary denials and clearer avenues to enforce approvals, improving project predictability and reducing delay risk.
- Developers pursuing builder’s remedy or mixed‑income projects—obtain a defined density calculus, protection from special local charges or processes, guaranteed density bonus treatment, and an evidentiary advantage in post‑entitlement disputes.
- Housing organizations and prospective residents—receive expanded standing to sue and statutory pathways to compel approvals and recover fees, which enhances advocacy leverage for affordable housing projects.
- Infill and transit‑adjacent developers—benefit from the potential 35 units/acre uplift and stronger vesting that favors projects near major transit stops and priority opportunity areas.
Who Bears the Cost
- Local governments and planning departments—face higher litigation exposure, tighter evidentiary burdens, requirements to prepare faster, more thorough written findings and checklists, and the potential for substantial fines and bond postings on appeal.
- Local budgets—may absorb or reallocate large penalty payments, and courts can require fines to be spent on affordable housing or revert to state control, reducing local fiscal flexibility.
- Administrative and legal operations—counties and cities will incur increased record‑preparation costs, potential consultant or counsel fees, and staff time defending frequent post‑entitlement challenges.
Key Issues
The Core Tension
The central tension is between accelerating housing approvals (and protecting applicants from discretionary delay) and preserving localized control to address legitimate, site‑specific public health, safety, environmental, and land‑use concerns. AB 660 resolves this by leaning toward expedited approvals and strict remedies, but in doing so it forces courts and planners into hard judgments about what constitutes an unavoidable health or safety impact and how to balance mitigation costs against affordability—tradeoffs with no purely legal solution.
AB 660 tightens procedural standards and enforcement without eliminating ambiguous edges. The statutory standard of a “specific, adverse impact” is narrowly defined, but its application will hinge on how courts interpret phrases like “significant, quantifiable, direct, and unavoidable” and what qualifies as an “objective, identified written public health or safety standard.” Local agencies will need robust, contemporaneous evidence to satisfy the preponderance threshold—a shift that can reduce discretionary bargaining but raises the bar for administrative recordkeeping and technical studies.
The builder’s remedy density formulas and the several temporary sunsets create implementation complexity. Calculating the ‘greatest of’ density metrics (150% of a statutory minimum, three‑times a local density, or housing element density), applying the 35 units/acre uplift, and reconciling local affordability requirements will be technical and likely litigated.
The statute’s sunset windows (2030, 2031, 2034 for different provisions) also invite a front‑loaded rush of preliminary applications and litigation to lock in treatments. Finally, the heavy‑duty enforcement (per‑unit fines, multipliers for bad faith) intends to deter delay but risks shifting budgets away from locally prioritized housing programs if agencies misstep or courts frequently find violations.
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