Washington HOA heat pump rights

Washington names heat pumps specifically, which is unusual. On property you own, an HOA cannot prohibit or unreasonably restrict a heat pump, whether it is an air source unit, a ground source system, or a mini-split. A blanket ban on exterior mechanical equipment cannot be used to block one.

The reach of the rule changed at the start of 2026. Heat pump protection used to sit in an older statute that applied only to some associations; as of January 1, 2026, it lives in WUCIOA and covers every Washington common interest community. The association keeps reasonable control over placement, screening, and noise, but not the power to say no outright.

The protection is not absolute. A Washington association can still ask you to apply for approval before you install, and it can set reasonable rules on where the equipment sits, how it is screened, and how loud it runs. What it cannot do is use those rules to effectively prohibit or unreasonably restrict an install that otherwise follows the law.

Washington draws the line in the statute itself. A restriction is reasonable only if it does not significantly raise the cost of the heat pump or significantly cut its efficiency. So a condition you cannot actually meet, or one that forces a much more expensive system, runs into the limit the law sets. Whether a particular condition crosses that line depends on the facts, so check your own situation with a Washington attorney.

Where the equipment goes changes the picture. Inside the walls of the unit you own, the protection is strongest. When a line set or condenser has to run along a shared wall or roof, which in most condos is a common element, you generally need board approval, but the statute says that approval cannot be unreasonably withheld. A licensed contractor who pulls permits and runs the lines in covers is doing what a reasonable architectural standard asks.

If you want to electrify heating, read these before you make an offer:

• Any blanket ban on exterior HVAC or mechanical equipment, which cannot block a protected heat pump.
• Placement, screening, or noise standards, and whether they effectively prevent an install.
• Whether the home already has a heat pump and whether it was approved.
• Board minutes for any heat pump or HVAC dispute.
• Any condition you could not realistically meet, or that would force a more expensive or less efficient system, since the law only allows reasonable restrictions.
• How long the board has to act on an architectural request, and whether it can withhold approval without a reason.
• Whether your equipment would run across a common element such as a shared wall or roof, which changes what the board can require.

If you are buying a Washington home and plan to add or replace a heat pump after you close, settle the question before your contingencies expire. The disclosure packet shows whether the architectural rules still ban exterior equipment, how the approval process works, and whether the home's current system was ever approved. Catching a blanket ban or a pattern of stalled approvals before you commit is far cheaper than fighting it afterward.

Heat pumps are central to how many Washington buyers plan to heat, cool, and cut energy costs, and the law protects them by name. A rules document that still bans all exterior equipment is out of step with the current statute.

An HOA Notes brief reads the architectural rules against the heat pump protection, flags a blanket ban that cannot stand, and cites the page behind each finding.

This page is written for buyers, and a brief from us reviews a disclosure packet before a purchase, not an active approval fight. If you already own and the board has denied or stalled a heat pump, the rule above still applies to you. Bring Revised Code 64.90.580 and your written record - your application, the conditions, and every reply - to a Washington real estate attorney.

Washington Revised Code 64.90.580 (Heat pump installation rights). An association cannot prohibit an owner from installing a heat pump on individually owned property; heat pumps (including air source, ground source, and mini-split systems) are explicitly protected under WUCIOA (RCW 64.90.580), which since January 1, 2026 governs all Washington common interest communities for this purpose (the former RCW 64.38.180 is effective only until that date); this protection reflects Washington's clean energy policy encouraging electrification of heating. The association may impose reasonable restrictions on the placement, screening, and noise standards for heat pump equipment on owner-controlled property; it may require that exterior equipment meet reasonable aesthetic standards provided it does not effectively prohibit installation.

When you read the disclosure packet, watch for no exterior HVAC units or mechanical equipment on any lot or exterior wall, all HVAC equipment requires prior written ARC approval and may be denied, and no modifications to rooflines or exterior walls without consent. HOA Notes flags each of these against the statute and tells you which restrictions are actually enforceable.