California HOA Water Conservation

Section 1: Overview — How water conservation interacts with HOA authority in California

California runs the most developed drought-landscaping-protection regime in the country, and it limits an association's authority over water-efficient landscaping directly, through the Davis-Stirling Common Interest Development Act — principally Cal. Civ. Code § 4735.¹ Under § 4735(a), any provision of an association's governing documents or its architectural or landscaping guidelines is void and unenforceable if it prohibits, or has the effect of prohibiting, low water-using plants as a group or as a replacement of existing turf, or the use of artificial turf or any other synthetic surface that resembles grass.² A companion section, § 4736, bars a governing-document provision that requires pressure washing a home's exterior during a declared drought emergency.⁷

Chronic water scarcity shapes California's posture. The state manages a hybrid surface-water system through the State Water Resources Control Board and groundwater through the Sustainable Groundwater Management Act, and that context explains the policy climate.¹³ Treat that water-supply and water-rights law as background only — it does not govern whether an association may restrict a homeowner's landscaping. The operative HOA-authority rule is § 4735 and § 4736.

Section 4735(c) adds a drought-emergency enforcement bar: while the Governor has declared a state of emergency over drought, or a local government has declared a local drought emergency, an association may not fine or assess an owner for reducing or eliminating the watering of vegetation or lawns.⁷ California sits alongside Nevada, Colorado, Arizona, Texas, and Utah as a state with statutory owner protections bearing on water-efficient landscaping — a contrast to silent, CC&R-governed states.¹⁵ What follows sets out the statutory architecture, the practical layering of state law and local water-provider rules, and the recent legislative record.

Section 2: The statutory and regulatory framework

2A. Statutory limits on HOA authority over water-efficient landscaping

The core provision is Cal. Civ. Code § 4735. Subdivision (a) voids and renders unenforceable any provision of the governing documents, or of architectural or landscaping guidelines or policies, that: prohibits, or has the effect of prohibiting, the use of low water-using plants as a group or as a replacement of existing turf; prohibits, or has the effect of prohibiting, the use of artificial turf or any other synthetic surface that resembles grass; or has the effect of prohibiting or restricting compliance with a water-efficient landscape ordinance adopted under Government Code § 65595(c), or a water-use regulation adopted under Water Code § 353 or § 375.² Artificial turf, then, is protected by § 4735(a)(2) — not by § 4736.

Subdivision (c) bars an association from fining or assessing an owner for reducing or eliminating the watering of vegetation or lawns, during any period the Governor has declared a state of emergency over drought under Government Code § 8558(b), or a local government has declared a local drought emergency under § 8558(c).⁷ Subdivision (d) carves out an owner who receives recycled water from a retail water supplier and fails to use it for landscaping irrigation.¹⁶ Subdivision (e) says an owner who installs water-efficient landscaping in response to an emergency declaration doesn't have to reverse or remove it once the emergency ends.¹⁷ The current text reflects the 2015 amendment made by AB 786.¹⁸

Section 4736 is a separate, narrower drought rule. A governing-document provision is void and unenforceable if it requires pressure washing the exterior of a separate interest — and any exclusive-use common area appurtenant to it — during a state or local government declared drought emergency.⁷

These are limits on HOA authority, not defaults the declaration may vary. Section 4735(a) opens with "Notwithstanding any other law" and declares conflicting provisions "void and unenforceable" — so a CC&R that conflicts is unenforceable to the extent of that conflict.² The protection isn't a blanket exemption from review, though. Subdivision (b) expressly preserves an association's ability to apply landscaping rules the governing documents establish, to the extent those rules fully conform to subdivision (a).⁸ Associations may still impose reasonable design, quality, and maintenance standards, require architectural approval, and enforce an owner's obligation to keep a lot neat and free of nuisance — they simply can't use those tools to prohibit protected landscaping.⁹ California's separate exterior-elevated-element inspection requirement, Civil Code § 5551, is a structural-safety rule and has nothing to do with water conservation.

2B. Water supply, drought declarations, rainwater and graywater

As background: California administers surface water under a hybrid riparian and prior-appropriation system through the State Water Resources Control Board, manages groundwater under the Sustainable Groundwater Management Act, and, through the Department of Water Resources, maintains a Model Water Efficient Landscape Ordinance that local agencies must adopt or match.¹³ None of this body of water-supply and land-use law governs whether an association may restrict a homeowner's landscaping — the HOA-authority rule remains § 4735 and § 4736.

The § 4735(c) enforcement bar switches on with a formal emergency declaration — either a Governor's drought proclamation under Government Code § 8558(b), or a local government's drought-emergency declaration under § 8558(c), with State Water Board conservation regulations running alongside these declarations.⁷ That trigger is live in part of the state right now: under Executive Order N-3-24, the Governor terminated the drought state of emergency on September 4, 2024 in 19 coastal and desert counties — home to 70 percent of the state's population, including Los Angeles, San Francisco, San Diego, Orange, Riverside, San Bernardino, Santa Clara, and Marin — while leaving it in effect in the remaining 39 counties. Whether the § 4735(c) bar applies, then, depends on the county and any local declaration.¹⁹

Graywater reuse gets regulated as a plumbing-systems matter, under the California Plumbing Code, Cal. Code Regs. tit. 24, Part 5, which permits laundry-to-landscape systems without a construction permit when performance conditions are met, and requires permits for more complex systems.⁶ The Davis-Stirling Act contains no provision specifically addressing an association's authority over graywater systems — that question falls to the CC&Rs and architectural review, subject to the general § 4735(a)(3) protection for compliance with water-efficiency ordinances.⁶ Rooftop rainwater harvesting is authorized statewide by the Rainwater Capture Act of 2012, AB 1750, Stats. 2012, Ch. 537, and rooftop capture needs no state water-right permit — rain-barrel and cistern systems under 360 gallons for landscape irrigation need no permit either, and state and local programs incentivize such systems.⁵ Here too, the Davis-Stirling Act stays silent on HOA authority over rainwater systems specifically, so the HOA-facing question gets answered by the declaration and architectural standards rather than by a dedicated statute.⁵

2C. Where water-conservation rules actually live in California

Even with § 4735 and § 4736 on the books, the recorded declaration and the association's architectural-control process remain central — they just operate only within the statutory limits. A CC&R, guideline, or rule that's inconsistent with water-efficient landscaping is unenforceable to the extent of the conflict, while standards that fully conform to § 4735(a) stay enforceable.⁸

The order of precedence runs like this: the mandatory Civil Code protections first, then the recorded declaration and architectural standards to the extent they're consistent with those protections, then rules and bylaws.¹⁰ Most California associations are organized as nonprofit mutual benefit corporations, and the California Nonprofit Mutual Benefit Corporation Law, Corporations Code § 7110 et seq., governs the association at the corporate level — director standards of care, formation, record rules — operating alongside the Davis-Stirling Act without overriding it.²⁰

Any owner-facing watering rule is far more likely to come from the local water provider than from the association. Retail suppliers like the Los Angeles Department of Water and Power and the East Bay Municipal Utility District, and wholesalers like the Metropolitan Water District of Southern California, set watering schedules, turf-replacement rebates, and conservation mandates.¹² These are utility and municipal measures, operating independently of the Davis-Stirling framework. The operational takeaway for a California manager: read § 4735 and § 4736, the declaration, and the local water provider's rules together, and never enforce a CC&R the Civil Code overrides.

Section 3: What the framework requires of HOAs

A. Landscaping approval and architectural review

An association may require architectural approval and apply reasonable design, quality, and maintenance standards to landscaping changes, as long as the standards fully conform to § 4735(a).⁸ What it may not do is prohibit, or impose conditions that have the effect of prohibiting, low water-using plants or artificial turf — this is a mandatory limit on HOA authority, and any conflicting provision is void to the extent of the conflict, not a default the declaration can vary around.²

B. Drought response and watering restrictions

During a Governor-declared or locally declared drought emergency, an association may not fine or assess an owner for reducing or eliminating the watering of vegetation or lawns — a mandatory statutory limit.⁷ During that same declared emergency, it may not enforce a governing-document requirement to pressure wash a home's exterior, either.⁷ And an owner who installs water-efficient landscaping in response to an emergency can't be required to reverse or remove it once the emergency ends.¹⁷

C. Rule adoption and disclosure

Landscaping rules and architectural guidelines must fully conform to § 4735(a) — a nonconforming rule is unenforceable no matter what process adopted it.⁸ Owner-facing watering schedules and conservation obligations generally originate with the local water provider, and managers need to track them separately from the governing documents.¹²

D. Enforcement limits and conflicts

Where a CC&R conflicts with § 4735, the CC&R is unenforceable to the extent of that conflict — the two aren't balanced against each other, the statute simply controls.² The Nonprofit Mutual Benefit Corporation Law governs the association as a corporate entity and supplies director standards of care, but it doesn't displace the Davis-Stirling water-landscaping limits.²⁰ And California has no dedicated ongoing HOA regulator — the Department of Real Estate reviews subdivision public reports for new developments only, doesn't regulate ongoing HOA operations, and the state doesn't license community-association managers.²¹

Section 4: Recent legislative and judicial activity

A. Recent bills

No bill enacted in the strict past-24-month window, July 2024 to July 2026, amends the Davis-Stirling water-efficient-landscaping provisions — § 4735 or § 4736 — or creates new HOA authority over drought-tolerant landscaping, artificial turf, rainwater, or graywater. The most recent water-and-HOA enactment of consequence, AB 1572, falls just outside that window but remains the operative near-term change for association common areas, so it's reported here as context.

B. Recent appellate rulings

No published decision of the California Courts of Appeal or the Supreme Court of California — within the past 36 months, or earlier — squarely interprets or applies Cal. Civ. Code § 4735 or § 4736 in the water-efficient or drought-tolerant landscaping context. The leading annotated Davis-Stirling references list no interpreting appellate authority for either section, and practitioners describe the area as largely untested in the courts.²² Trial-level disputes proceed through the California Superior Courts, with appeals to the California Courts of Appeal — six appellate districts — and discretionary review by the Supreme Court of California; any future published opinion will get reported here with its district specified.

C. Active legislative debates

No active proposal would change how California treats HOA water-conservation landscaping under § 4735 or § 4736, as of the verification date.

Section 5: National positioning and related coverage

Look at the water-conservation-specific clustering, and California belongs to the group of drought-exposed states that have enacted statutory owner protections bearing on water-efficient landscaping — the most prominent example, alongside Nevada, Colorado, Arizona, Texas, and Utah. A second group has partial or emerging provisions; a third remains silent and CC&R-governed.¹⁵ What makes California's structure distinctive is a single, unified Davis-Stirling Act whose water-landscaping protections in § 4735 and § 4736 are mandatory and override conflicting CC&Rs — stronger than the architectural-review-plus-declaration posture of a silent state.¹ For a firm entering California from a silent state, the practical point is direct: the assumption that an association controls landscaping by CC&R doesn't hold here, because § 4735 and § 4736 constrain the association itself and void nonconforming governing-document provisions.²

HOA Weekly's California water-conservation coverage updates quarterly as the legislature and the California courts act, and as drought conditions shift. California operators must apply § 4735 and § 4736 and read the declaration and local water-provider rules alongside the statute. Federal frameworks apply to California associations regardless of state law — the Fair Housing Act, the Americans with Disabilities Act, and the Fair Debt Collection Practices Act among them.

Footnotes

1. Cal. Civ. Code § 4735, Davis-Stirling Common Interest Development Act, California Legislative Information ↩
2. Cal. Civ. Code § 4735(a) ↩
3. Cal. Civ. Code § 4735(a)(2); AB 349 (Stats. 2015), amending Section 4735 to add artificial turf protection ↩
4. Cal. Civ. Code § 4735(a)(1) ↩
5. Rainwater Capture Act of 2012 (AB 1750, Stats. 2012, Ch. 537), California Legislative Information ↩
6. California Plumbing Code, Cal. Code Regs. tit. 24, Part 5 (graywater systems), summarized by US EPA ↩
7. Cal. Civ. Code § 4735(c) and § 4736 ↩
8. Cal. Civ. Code § 4735(b) ↩
9. Cal. Civ. Code § 4735(b) ↩
10. Davis-Stirling Common Interest Development Act, Cal. Civ. Code § 4000 et seq. ↩
11. California State Water Resources Control Board, Water Conservation Portal ↩
12. East Bay Municipal Utility District, HOA water-conservation legislation and conservation measures (utility measure) ↩
13. California Department of Water Resources, Model Water Efficient Landscape Ordinance; State Water Board surface-water and Sustainable Groundwater Management Act programs (background) ↩
14. AB 1572 (Friedman), Potable water: nonfunctional turf (2023–2024), adding Water Code § 10608.14, California Legislative Information ↩
15. Comparative state statutes, e.g., Nev. Rev. Stat. § 116.330 (drought-tolerant landscaping); Colo. Rev. Stat. § 38-33.3-106.5; Tex. Prop. Code § 202.007 ↩
16. Cal. Civ. Code § 4735(d) ↩
17. Cal. Civ. Code § 4735(e) ↩
18. AB 786 (Stats. 2015, Ch. 780), amending Cal. Civ. Code § 4735 ↩
19. Office of the Governor, drought state of emergency terminated in 19 counties (Executive Order N-3-24), September 4, 2024 ↩
20. California Nonprofit Mutual Benefit Corporation Law, Cal. Corp. Code § 7110 et seq. ↩
21. California Attorney General, Homeowners Associations (regulatory context; Department of Real Estate reviews subdivision public reports) ↩
22. Adams Stirling PLC, annotated Davis-Stirling Act (no interpreting appellate authority listed for § 4735 or § 4736) ↩