Washington Ranks 7th Priciest State for Home Construction — And Regulation Is Only One Part of Why
Washington’s cost of living reputation extends straight into the framing and foundation of every new home built in the state.
A report this year from Wyoming-based Equin Construction ranks Washington 7th in the nation for cost of home construction per square foot — roughly 30% above the national average. That tracks with a separate, detailed 2024 study from the Building Industry Association of Washington, which found the average cost to build a single-family detached home in the state runs about $309 per square foot, translating to a median sales price near $690,701 for a 2,505-square-foot home — well above the national comparison figure in that same study.
The BIAW research breaks down where that premium actually comes from: local and state regulatory costs account for roughly 29.5% of the median new home price, compared to a national average of 23.8%. On a $690,701 home, that’s about $204,000 in regulatory cost alone. Raw land adds another significant layer — a median of roughly $287,000 per lot in counties like King, Pierce, Snohomish, Kitsap, and Thurston.
The Columbian’s editorial board pointed to this data in early August as part of a broader argument that permitting process and zoning reform deserve more legislative attention — a theme that dovetails directly with the Clark County permitting complaints covered above.
The other side of the ledger. That 29.5% regulatory-cost figure is worth using carefully. BIAW is a builders’ trade association, and the study behind it — like the underlying NAHB methodology it’s built on — is based on builders and developers self-reporting a percentage estimate of how much regulation adds to their costs, not an itemized, independently audited accounting. NAHB’s own 2021 methodology writeup is explicit that the study “is not arguing that all regulation is bad or should be eliminated,” and that its numbers are meant to be illustrative rather than a precise measurement.
Critics of these studies make a further point: some of what gets counted as “regulatory cost” is really the cost of a builder’s own site or product decisions. A widely circulated critique of the NAHB methodology argues that when a builder chooses to build on land that requires flood-zone engineering, for example, the resulting compliance cost gets attributed to “regulation” rather than to the site-selection choice that created the need for it. The same critique notes that the average new American home has grown to roughly 2,300 square feet — well above the modest postwar starter homes builders once produced — and argues that industry has largely moved upmarket into higher-margin construction, a shift that isn’t captured in a regulatory-cost line item.
It’s also worth noting that even pro-housing-supply advocates who agree parts of the code need reform — Sightline Institute, for instance, has backed Washington bills to loosen parking mandates and reconsider energy-code requirements on conversions — frame it as targeted fixes to specific rules rather than a blanket “30% of cost is red tape” claim. Building and fire codes exist for real safety reasons, and reform-minded groups generally aren’t arguing to roll those back.
None of this means the underlying cost pressure isn’t real — land costs alone are a genuine and substantial driver, and Washington’s raw land prices are not in dispute. But the regulatory-cost share specifically comes from an industry-funded, self-reported study, and readers evaluating the “permitting reform will fix affordability” argument should know that’s the nature of the data behind it.
Why this matters for contractors: Land costs, materials, and labor are all real, well-documented cost drivers in Washington alongside regulation — and the regulatory share specifically comes from an industry-authored, self-reported study rather than an independently audited figure. That’s useful context both when using this data with clients and when weighing in on the permitting-reform debate playing out at the legislative level.
Sources: The Columbian; Equin Construction; Building Industry Association of Washington (BIAW); National Association of Home Builders (NAHB), “Government Regulation in the Price of a New Home: 2021”; Building Code Forum methodology critique; Sightline Institute
