SB 336 adds a new partial welfare exemption to California’s property‑tax code for rental developments that dedicate units to low‑ and moderate‑income households. The exemption reduces assessed value proportionally to the share of qualifying units when the owner certifies enforceable rent restrictions and other conditions, and it specifically targets newly constructed or converted residential units on or after January 1, 2026.
The bill ties the tax benefit to substantive obligations: a minimum 55‑year affordability commitment (via recorded restriction or enforceable agreement), initial rents below market as shown by a market study, periodic market updates, a cap on rent increases while the same tenant remains, and a requirement that the tax savings be used to preserve or deepen affordability. Those conditions shift project economics for nonprofit and mission‑driven owners, create new monitoring tasks for assessors and the State Board of Equalization, and expose local tax bases to a new long‑running exemption stream.
At a Glance
What It Does
Establishes a partial welfare (property‑tax) exemption equal to the percentage of residential units in a rental property that serve low‑ and moderate‑income households, subject to enforceable rent restrictions and certification by the owner. It applies only to newly constructed or converted residential units on or after January 1, 2026, with claims filed within five years of the building permit issuance.
Who It Affects
Nonprofit and eligible for‑profit owners of rental housing (including community land trusts and limited partnerships with eligible nonprofit managing partners), county assessors, the State Board of Equalization, lenders and investors underwriting projects with long affordability covenants, and tenants in designated units.
Why It Matters
The measure creates a predictable property‑tax incentive tied to 55‑year affordability commitments, which can change the financing and operating calculus for projects that include moderate‑income units. It also imposes new compliance, monitoring, and revenue‑forecasting demands on local governments and state tax administrators.
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What This Bill Actually Does
SB 336 inserts a new pathway into the welfare exemption for rental developments that set aside units for low‑ and moderate‑income households. Rather than exempting a whole parcel, the bill grants a partial exemption: the reduction equals the share of units that meet the statute’s affordability tests.
To qualify, owners must enter into and certify an enforceable deed restriction, recorded agreement with a public agency, or other legal instrument that guarantees the designated units remain available to eligible households for at least 55 years.
The bill requires owners to demonstrate the affordability of those units at project start: initial rents must be below fair market rent as established in a market study prepared in accordance with California Tax Credit Allocation Committee market study guidance. The market study must be done when the first designated unit is leased and updated at least every five years; while the same low‑ or moderate‑income household occupies a unit, rent increases are limited to the percent change in the county Area Median Income between the two most recent HCD publications.
The owner must certify these facts under penalty of perjury and also certify that the property tax savings will be used to maintain or reduce rents for the qualifying units.Practically, the exemption is available only for units newly constructed or created by conversion on or after January 1, 2026, and owners must claim the exemption within five years following issuance of the building permit for those units. The statute defines the covered units, related facilities (manager’s units and common areas), and low‑ and moderate‑income households by cross‑reference to existing Health and Safety Code definitions.
The statute also includes severability language, an effective lien‑date provision for 2026 and later, and preserves the State Board of Equalization’s role in administering the welfare exemption except where law assigns responsibility to county assessors.
The Five Things You Need to Know
The exemption reduces assessed value proportionally: percentage exempt = (number of qualifying low‑/moderate‑income units) ÷ (total residential units).
Owners must commit qualifying units to affordability for at least 55 years via an enforceable agreement or recorded deed restriction to be eligible.
Initial rents for designated units must be below fair market rent as shown by a market study (CTCAC guidelines); that study must be updated at least every five years.
While the same qualifying household remains in a unit, the owner may only raise rent by the percentage change in county Area Median Income between the two most recent HCD publications.
The owner must claim the exemption within five years after issuance of the building permit for newly constructed or converted units; the rule applies to lien dates on or after January 1, 2026.
Section-by-Section Breakdown
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Eligibility framework and proportional exemption
This subsection sets the core rule: rental properties owned by qualifying nonprofit or eligible limited partnerships can receive a partial welfare exemption equal to the share of units serving low‑ and moderate‑income households. It mirrors existing welfare exemption language but transforms the benefit into a pro rata reduction tied to unit counts rather than parcel‑wide status, which requires owners to document which units are restricted and how those units meet statutory affordability tests.
55‑year enforceable affordability commitment
To get the exemption, the owner must certify the existence of an enforceable and verifiable agreement with a public agency or a recorded deed restriction that keeps designated units available to low‑ and moderate‑income households for not less than 55 years. The statute treats a unit as continuing to qualify if the occupants were eligible on the lien date and the unit remains rent restricted, subject to income ceilings keyed to area median income thresholds.
Market study and rent increase limits
Owners must show that the initial rent charged on each designated unit is below fair market rent based on a market study performed in general conformance with California Tax Credit Allocation Committee guidelines; that study must be refreshed at least every five years. While the same low‑ or moderate‑income household occupies a unit, future rent increases are limited to the percentage change in the county Area Median Income between the two most recent HCD publications, constraining revenue growth tied to tenant continuity.
Timing and applicability — new construction and conversions
The exemption applies only to residential units that were newly constructed or converted from commercial uses on or after January 1, 2026. Owners must file a claim for the exemption within five years after the issuance of the building permit for those newly created units, which ties eligibility to the construction timeline rather than to later changes in occupancy.
Definitions, lien dates, and severability
The bill imports statutory definitions for 'low‑ and moderate‑income households' and 'related facilities' from the Health and Safety Code and clarifies that units temporarily vacant for turnover or repairs still count as occupied. It makes the new rules applicable to lien dates on or after January 1, 2026 and includes a severability clause to preserve the remainder of the subdivision if any part is invalidated.
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Explore Housing in Codify Search →Who Benefits and Who Bears the Cost
Every bill creates winners and losers. Here's who stands to gain and who bears the cost.
Who Benefits
- Low‑ and moderate‑income tenants in qualifying units — those households get access to units with rents certified below market and additional protections against steep rent increases while they remain in place.
- Nonprofit developers, community land trusts, and mission‑driven owners — the property‑tax reduction improves project operating pro forma for developments that accept long affordability covenants, lowering ongoing carrying costs and potentially making deeper affordability financially viable.
- Public agencies and housing intermediaries — the exemption is a tool they can use to encourage 55‑year affordability via recorded agreements, augmenting existing financing tools without direct budget outlays.
- Residents and advocates seeking longer‑term affordability — a 55‑year minimal commitment creates a durable pool of restricted units beyond typical 30‑ to 45‑year subsidy terms.
Who Bears the Cost
- Local governments and school districts — the partial exemption reduces property tax revenue over a long period, complicating local budgets and revenue forecasts.
- County assessors and the State Board of Equalization — administrators must review certifications, verify enforceable restrictions and market studies, and monitor ongoing compliance, increasing workload without an explicit funding mechanism.
- Lenders and private investors in projects subject to the restriction — a 55‑year recorded limitation and rent growth caps can reduce resale value and complicate conventional financing terms, potentially raising borrowing costs.
- For‑profit developers who aim to remain market‑rate — if they attempt to access the exemption, they must accept long restrictions and compliance obligations that may limit operational flexibility and returns.
Key Issues
The Core Tension
The bill embodies a trade‑off between creating a strong, long‑term incentive to preserve moderate‑income housing and imposing long‑lasting fiscal costs and operational complexity: policymakers must decide whether the public benefit of deeper, durable affordability justifies a new stream of property‑tax revenue loss and a significant increase in compliance and oversight obligations for state and local tax authorities.
SB 336 ties a lasting property‑tax incentive to long affordability commitments and detailed operational rules, but it leaves several practical questions open that matter for implementation and fiscal planning. The statute requires market studies in 'general conformance' with CTAC guidelines and periodic updates, but it does not prescribe an approval process or a standard reviewer for market studies; that gap invites divergent assessor practices across counties and potential disputes over what constitutes 'fair market rent.' The requirement that tax savings be used to maintain or reduce rents is meaningful in intent but vague operationally: the bill does not define auditing standards, reporting requirements, or penalties for diversion of funds, which will make enforcement uneven unless the Legislature or regulators add implementing rules.
The 55‑year restriction increases the public benefit but also complicates project finance. Long covenants reduce future resale pools and may deter private capital or require lower loan‑to‑value ratios.
The statute mitigates some credit risk with precise definitions of qualifying units and a pathway for counting temporarily vacant units, yet it introduces administrative burdens for assessors and the State Board of Equalization without allocating resources. Finally, the measure interacts with existing federal, state, and local subsidy and deed‑restriction regimes; where federal financing prescribes different rent rules the bill defers to those federal terms, but tensions may still arise when multiple layered restrictions govern the same units.
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