HOA Documents and ADUs: Navigating State Law vs. Community Restrictions

The ADU Boom and HOA Conflict

Accessory dwelling units—also known as granny flats, in-law suites, casitas, secondary suites, and backyard homes—have become a cornerstone of state housing policy over the past decade. California alone added more than 80,000 ADU permits between 2018 and 2024, and states from Oregon to Colorado to Washington have followed suit with aggressive ADU mandates. The rationale is simple: ADUs increase housing density without requiring new land acquisition, large-scale infrastructure, or zoning changes.

The problem is that many of the communities most in need of ADU-friendly policies are governed by homeowners associations with recorded CC&Rs that predate the state ADU movement by decades. A typical restriction might read: "No lot shall be improved with more than one single-family dwelling." Others limit occupancy to a single family, prohibit commercial use that would include long-term rentals, or require minimum home sizes that preclude smaller detached ADUs. When a state law says "you may build an ADU" and the HOA says "you may not," title teams must determine which authority prevails.

The Scope of the Conflict

The ADU-versus-HOA conflict touches nearly every aspect of a real estate transaction. Will the lender finance a property with an unapproved ADU? Can the buyer obtain title insurance if the CC&Rs contain a recorded prohibition that state law has arguably voided? Will the HOA enforce its covenant after closing, and will the buyer have the resources to fight it? These questions do not have uniform answers, which is why title teams must understand both the applicable state statute and the specific language of the CC&Rs before they can sign off on marketability.

Why This Matters Now

The wave of ADU construction that began in the late 2010s has now reached the resale market. Properties with existing ADUs are being transferred, and the next buyer may have no idea that the previous owner built the unit in violation of HOA covenants. Title agents who encounter an existing ADU must verify not only that it was built with proper permits but also that the HOA either approved it or was legally preempted from prohibiting it. Without this verification, the closing file carries a risk that could surface years later in the form of a title claim or covenant enforcement action.

California ADU Laws Overriding HOAs

California has the most extensive set of ADU preemption laws in the country, and the state has been at the center of the conflict between state housing policy and HOA restrictive covenants. Understanding California's framework is essential because other states have modeled their own legislation on it.

AB 3182 and the Preemption Framework

Assembly Bill 3182, signed into law in 2020 and effective January 1, 2021, was a landmark piece of legislation that directly addressed the HOA-ADU conflict. The bill added Government Code Section 65852.2(l), which states that local ADU ordinances—including those that mandate ministerial approval—supersede restrictive covenants unless the covenants provide broader ADU rights. In plain terms, if a city or county ordinance allows ADUs, the HOA cannot use its CC&Rs to block what the local ordinance permits.

AB 3182 also amended Civil Code Section 4751 to clarify that any covenant or restriction that effectively prohibits or unreasonably restricts the construction or use of an ADU on a lot zoned for single-family or multifamily use is void and unenforceable. This includes restrictions on square footage, occupancy limits, and architectural standards that have the effect of preventing ADU development.

SB 9 and Urban Lot Splits

Senate Bill 9, effective January 1, 2022, went further by allowing owners to split existing single-family lots and build up to two units on each resulting lot. While SB 9 primarily addresses zoning and ministerial approval, its interaction with HOA covenants has been significant. In HOA communities, SB 9 does not automatically override recorded CC&Rs that prohibit lot splits or multiple units. However, when combined with AB 3182 and local ordinances that expressly preempt HOA restrictions, the practical effect is that many HOAs in California can no longer enforce blanket prohibitions on ADUs or lot divisions.

AB 670 and AB 671

AB 670 (2021) and AB 671 (2021) reinforced the preemption framework. AB 670 added Civil Code Section 4751, which voids any covenant or restriction that prohibits or unreasonably restricts ADU construction. AB 671 required the Department of Housing and Community Development to create educational materials about ADU rights, including the limitations on HOA authority. Together, these bills created a strong presumption that HOAs cannot ban ADUs in communities subject to California ADU law.

What California HOAs Can Still Regulate

California law does not strip HOAs of all authority. Associations can still require architectural review, enforce reasonable aesthetic standards, impose parking requirements consistent with local ordinances, and enforce occupancy limits that do not conflict with state law. The key distinction is that these restrictions must be applied in a manner that does not effectively prohibit ADU construction. A requirement that all ADUs match the primary residence in exterior finish is likely reasonable. A requirement that limits ADU size to 400 square feet when state law allows 800 or 1,000 square feet may be preempted.

Oregon's Statewide ADU Preemption

Oregon was one of the earliest adopters of statewide ADU mandates and has one of the strongest preemption frameworks in the country. In 2017, the Oregon Legislature passed House Bill 2001, which required cities with populations over 10,000 to allow ADUs in single-family residential zones. The law took effect in 2019 and has been expanded since then.

Oregon Revised Statute 197.312

ORS 197.312 requires that local governments allow at least one ADU on any lot zoned for detached single-family dwellings. The law prohibits local governments from imposing owner-occupancy requirements on ADUs, limits parking requirements to no more than one space per ADU, and restricts minimum lot size requirements that would have the effect of prohibiting ADUs. Critically for HOA-governed properties, ORS 197.312 states that the requirements of the statute prevail over any conflicting provision in a recorded deed restriction or covenant.

The HOA Preemption Effect in Oregon

Oregon's statute explicitly provides that its ADU provisions supersede "any conflicting provision in a recorded deed restriction or covenant." This language directly targets HOA CC&Rs that prohibit ADUs. When an Oregon HOA covenants that only one dwelling is permitted per lot, that restriction is preempted by state law for lots within cities subject to HB 2001. However, the preemption applies only to the extent that the covenant conflicts with the state's ADU mandate. HOAs retain the authority to regulate other aspects of land use, provided those regulations do not effectively ban or unreasonably restrict ADU development.

Portland and Metro-Specific Rules

Portland and other Metro-area jurisdictions have adopted ADU ordinances that go beyond the state minimums. Portland eliminated system development charges for ADUs in 2021, streamlined the permitting process, and adopted pre-approved ADU plans that reduce design costs. Title teams handling properties in Portland and surrounding areas should verify whether local ordinances provide broader ADU rights than the state baseline, as those local provisions also supersede conflicting HOA covenants.

Washington's ADU Legislation

Washington State enacted significant ADU reforms through Engrossed Substitute House Bill 1337, effective July 1, 2024, and Second Substitute House Bill 2321, which took effect in 2023. These laws represent a comprehensive push to eliminate barriers to ADU construction across the state.

ESHB 1337: Mandatory ADU Allowance

ESHB 1337 requires all cities and counties planning under the Growth Management Act to allow at least two ADUs per lot in residential zones, including both attached and detached units. The law prohibits local governments from imposing owner-occupancy requirements on ADUs, restricts parking mandates to no more than one space per unit, and limits setback requirements. Critically, the law states that its provisions "supersede and preempt any conflicting local ordinance, development regulation, or private covenant."

HOA Covenant Preemption in Washington

The explicit preemption of "private covenants" is what makes Washington's law directly relevant to HOA communities. RCW 36.70A.638, the implementing statute, provides that ADU regulations adopted under the law supersede private covenants to the extent of any conflict. This means that an HOA covenant prohibiting ADUs in a Washington community subject to the Growth Management Act is likely unenforceable. Title teams in Washington must confirm whether the property is located in a jurisdiction covered by the Act and whether the HOA's CC&Rs contain provisions that conflict with the state mandate.

Seattle and King County Considerations

Seattle and King County have some of the most ADU-friendly policies in the state. Seattle eliminated owner-occupancy requirements for ADUs in 2019 and has removed parking requirements near transit. King County's ADU ordinance allows up to two ADUs per lot and prohibits HOAs from adopting rules that ban or effectively prohibit ADUs. Title teams handling transactions in these jurisdictions should be prepared for the strongest level of preemption.

Colorado's Recent ADU Reforms

Colorado entered the ADU preemption arena with House Bill 24-1152, signed into law in 2024 and effective July 1, 2025. The law represents Colorado's most significant step toward overriding local and private restrictions on accessory dwelling units and directly addresses the role of HOAs.

HB 24-1152: Statewide ADU Standards

HB 24-1152 requires all Colorado municipalities to allow ADUs in residential zones, prohibits owner-occupancy requirements, limits parking mandates to one space per ADU, and restricts setback and lot-size requirements that would effectively ban ADUs. The law applies to all municipalities that are subject to Colorado's local land use planning statutes, which covers the vast majority of incorporated areas.

Preemption of HOA Restrictions

Colorado's statute includes explicit preemption language: "A provision of a common interest community declaration, covenant, or rule that prohibits or unreasonably restricts the construction or use of an accessory dwelling unit in a manner that conflicts with this article is void and unenforceable." This places Colorado alongside California and Oregon in providing statutory protection for ADU owners against HOA overreach. However, the law permits HOAs to adopt reasonable aesthetic standards, architectural guidelines, and safety requirements that do not have the effect of preventing ADU development.

Denver and Front Range Impact

Denver has been at the forefront of ADU policy, with its own ordinance allowing ADUs citywide since 2010. The city has also adopted pre-approved ADU plans and reduced permitting fees for affordable units. Title teams handling transactions in Denver, Boulder, Colorado Springs, and other Front Range communities should verify whether the local ordinance provides additional protections beyond the state baseline.

Other States with ADU Preemption Laws

While California, Oregon, Washington, and Colorado have the most comprehensive ADU preemption frameworks, several other states have enacted laws that limit HOA authority to restrict ADUs. Title teams operating in multiple states should be aware of the following:

Vermont

Vermont's Act 179 (2022) requires municipalities to allow ADUs in all residential districts and prohibits condominium and HOA documents from prohibiting or restricting ADU construction beyond what is allowed by local zoning. The law explicitly voids covenants that conflict with its provisions.

Massachusetts

Massachusetts passed the ADU provisions of its housing choices legislation in 2021, requiring that at least one ADU be allowed by right in single-family residential zones. The law does not explicitly address HOA covenants in the same way as western states, but it directs municipalities to adopt ADU-friendly zoning that can supersede private restrictions in certain circumstances.

Maine

Maine's LD 2003 (2022) requires municipalities to allow ADUs in all residential zones and prohibits owner-occupancy requirements. While the law does not contain an express HOA preemption clause, it provides that local ADU ordinances prevail over conflicting deed restrictions and covenants to the extent permitted by law.

New York

New York's ADU legislation, enacted through the 2023 executive budget, requires municipalities in the downstate region to allow ADUs. The law includes provisions that limit owner-occupancy requirements and parking mandates but does not contain an explicit HOA preemption clause. Title teams in New York should consult local counsel when evaluating ADU restrictions in HOA communities.

Other States with Active Legislation

Hawaii, Maryland, New Jersey, and Connecticut have all considered or enacted ADU legislation that includes elements of HOA preemption. The trend is unmistakable: state legislatures are increasingly viewing HOA restrictions as a barrier to housing production and are acting to remove them. Title teams should monitor legislative developments in their states and be prepared for changes in the preemption landscape.

What Title Teams Must Verify: CC&Rs vs State Law

When a property subject to HOA governance has an existing ADU or a buyer who plans to build one, title teams must perform a systematic verification process to determine whether the CC&Rs conflict with state law and what that conflict means for marketability.

Step One: Identify the Applicable State Statute

The first step is determining which state's ADU preemption law applies to the property. This is straightforward when the property is located in California, Oregon, Washington, or Colorado, where explicit preemption exists. For properties in states with weaker or less direct preemption, title teams need to evaluate whether the state statute supersedes private covenants, whether local ordinances provide additional protection, and whether any case law has interpreted the scope of preemption.

Step Two: Read the CC&Rs for ADU-Specific Language

The CC&Rs must be reviewed for any provision that could be interpreted as prohibiting or restricting ADUs. Common language includes single-family-only restrictions, minimum square footage requirements, occupancy limits tied to familial relationship, parking requirements that exceed state limits, and architectural standards that would make ADU development economically infeasible. Each potentially conflicting provision must be compared against the applicable state statute.

Step Three: Evaluate the Preemption Scope

Not all state ADU laws preempt all restrictive covenants. Some preempt only outright bans, while others preempt any provision that "unreasonably restricts" ADU development. Title teams must determine whether the specific CC&R language falls within the scope of the state's preemption. This evaluation often requires legal judgment, and title agents should not hesitate to seek guidance from the company's underwriting counsel.

Step Four: Verify Permit and Approval History

If an ADU already exists on the property, verify that it was built with valid building permits and that any required HOA approval was either obtained or was not required due to state preemption. A building permit alone does not resolve the HOA conflict. An owner who built an ADU with a valid city permit but without HOA approval may still face enforcement action unless the state statute preempts the HOA's restriction.

Step Five: Document the Analysis in the Closing File

Every step of the ADU verification process should be documented in the closing file. Include copies of the relevant state statutes, the CC&R provisions at issue, any correspondence with the HOA or management company regarding the ADU, and the legal analysis supporting the conclusion that the ADU is either permitted or prohibited. Thorough documentation protects the title company if the ADU issue is later challenged.

Best Practices for Title Teams Handling ADU Properties

ADU properties present unique challenges that require a proactive approach from title teams. The following best practices can help avoid surprises and protect all parties involved in the transaction.

Order HOA Documents Early

ADU issues often surface during the HOA document review, making it critical to order the governing documents as early as possible in the transaction. The CC&Rs, bylaws, rules and regulations, and recent meeting minutes should all be reviewed for ADU-related provisions before the inspection period expires. Waiting until the final week before closing invites costly delays.

Obtain an ADU-Specific Estoppel Letter

In addition to the standard resale certificate, request an ADU-specific estoppel or written confirmation from the HOA regarding its position on ADUs. Ask whether the HOA has approved existing ADUs on the property, whether any enforcement actions are pending, and whether the board has taken a formal position on state ADU preemption. A written response from the HOA can eliminate ambiguity and protect the buyer from post-closing disputes.

Coordinate with the Buyer's Lender

Lenders have varying requirements for properties with ADUs. Fannie Mae allows ADU rental income to be used for qualifying purposes under certain conditions, while FHA and VA have specific guidelines for properties with accessory units. Title teams should coordinate with the buyer's lender to ensure that the ADU status does not affect loan approval. If the ADU was built without HOA approval, the lender may require documentation that the HOA does not object.

Disclose ADU Conflicts to All Parties

If the governing documents contain provisions that conflict with state ADU law, disclose this conflict to the buyer, seller, lender, and real estate agents in writing. Explain that while state law may preempt the HOA restriction, enforcement risk remains until a court or the HOA board confirms the preemption. Obtain written acknowledgment from the buyer that they understand the conflict and the associated risks.

Escrow Funds for Potential ADU Issues

When an ADU exists without clear HOA approval or when the preemption analysis is uncertain, the title company may require a holdback or escrow to cover potential HOA fines or legal expenses. The amount should be sufficient to cover the HOA's maximum fine authority plus legal fees. This protection ensures that funds are available to resolve the issue if it arises after closing.

Know When to Escalate to Underwriting Counsel

ADU preemption is an evolving area of law, and not every title agent will be comfortable evaluating the interaction between a state statute and a specific CC&R provision. Title companies should have a clear escalation path to underwriting counsel for ADU-related questions. When in doubt, escalate. The cost of a legal opinion before closing is far less than the cost of defending a title claim after closing.

Frequently Asked Questions

Can an HOA prohibit ADUs if state law allows them?

In many states with ADU preemption laws, no. California, Oregon, Washington, Colorado, and others have enacted legislation that voids or supersedes HOA covenants and restrictions that prohibit or unreasonably restrict accessory dwelling units. While the specifics vary by state, the trend is clear: state ADU mandates override conflicting HOA rules.

What types of ADU restrictions can HOAs still enforce?

HOAs can typically enforce reasonable restrictions on safety, building codes, parking, and architectural standards even when state law preempts outright ADU bans. However, these restrictions must not have the effect of making ADU development impracticable or economically infeasible. State laws often define specific parameters for what constitutes a reasonable restriction.

How do state ADU laws affect title and escrow?

State ADU laws create a direct conflict with recorded CC&Rs that prohibit secondary units. Title teams must determine whether a state preemption law renders an HOA restriction unenforceable, which affects marketability of title. If the CC&Rs contain a prohibition that state law has voided, the property may close with a cloud on title unless the preemption is confirmed in writing.

Do California ADU laws override HOA CC&Rs?

Yes. California Government Code Section 65852.2, as amended by AB 3182 and AB 670, expressly provides that ADU provisions in local ordinances supersede restrictive covenants, including HOA CC&Rs. California Civil Code Section 4751 further voids any covenant or restriction that effectively prohibits or unreasonably restricts ADU construction. AB 3182 included specific provisions addressing HOA-governed properties.

How should title agents verify whether an HOA restriction is preempted?

Title agents should review the state statute applicable to the property's location, compare the HOA's CC&Rs against the statutory preemption language, and obtain a written confirmation from legal counsel or documented guidance from the state housing agency. The resale certificate or estoppel letter should be reviewed for any disclosure of ADU-related enforcement actions or interpretations.

Does title insurance cover disputes over ADU enforcement by an HOA?

Standard title insurance policies generally do not cover disputes arising from HOA covenant enforcement, including conflicts over ADU prohibitions. Title insurance protects against defects in title, recorded liens, and encumbrances—not against litigation over whether a particular use is permitted under community restrictions. Buyers should be advised to seek independent legal counsel before relying on an ADU right that conflicts with recorded CC&Rs.

Key Takeaways

• State ADU laws are overriding HOA restrictions at an accelerating pace. California, Oregon, Washington, Colorado, Vermont, Maine, and others have enacted statutes that preempt conflicting HOA covenants. The trend is spreading to additional states each legislative session.
• Not all preemption is created equal. Some states explicitly void conflicting covenants. Others provide that local ADU ordinances supersede private restrictions. Title teams must read the specific statutory language to determine the scope of preemption.
• HOAs retain authority over reasonable restrictions. Even in strong preemption states, HOAs can enforce architectural standards, safety requirements, and parking rules that do not effectively prohibit ADU development.
• Order governing documents early and review for ADU language. The CC&Rs may contain single-family-only restrictions, minimum size requirements, or occupancy limits that conflict with state ADU law. These provisions must be evaluated against the applicable statute.
• Obtain an ADU-specific estoppel letter. Written confirmation of the HOA's position on ADUs eliminates ambiguity and protects the buyer from post-closing enforcement actions.
• Document every step of the analysis. Retain copies of state statutes, CC&R excerpts, HOA correspondence, and legal opinions in the closing file to defend against future claims.
• Escalate when uncertain. ADU preemption is an evolving area. When the analysis is unclear, seek guidance from underwriting counsel before closing.

For deeper dives into state-specific requirements, see our guides on California HOA disclosure requirements, Colorado HOA document requirements, and Washington HOA document requirements. For related federal and state override issues, read our article on solar panels, EV chargers, and satellite dishes.