Construction and remodel cost in Washington
Energy code upgrades and wet-climate detailing. Across Washington, costs run about 15% above the national average — the table below applies the state index of 1.15 to national averages for the projects homeowners ask about most.
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Typical Washington costs in 2026
| Project | Low | High |
|---|---|---|
| New home constructionMid-range finishes, excl. land | $144 | $224 |
| Whole-house remodelGut renovation of existing structure | $81 | $138 |
| Major kitchen remodelMid-range cabinets, stone counters, appliances | $25,300 | $36,800 |
| Bathroom remodelMid-range, full replacement | $10,900 | $15,500 |
| Roof replacementArchitectural asphalt shingles, ~1,800 sq ft roof, tear-off included | $8,700 | $14,300 |
| Interior paintingWhole 2,000 sq ft home, two coats, labor included | $3,400 | $7,500 |
Planning estimate only — confirm quantities with your supplier or contractor before ordering.
Where Washington projects cost the most
Metro markets move independently of the state average. These planning indices show how the biggest markets in Washington compare with the national average.
What drives costs in Washington
Washington’s energy code is one of the strictest in the country and drives insulation, ventilation and glazing specifications. On the west side of the state, wet-climate detailing — drainage planes, flashing and rain screens — is essential rather than optional.
Permits and inspections
Cities run their own permit review, often with separate trade permits. Projects in shoreline or critical areas may need additional environmental review before work can start.
How to use these numbers
Treat the ranges as a sanity check rather than a quote. Ask two or three licensed contractors for a written, itemised bid, and compare the scope line by line — the cheapest bid is often the one that quietly excludes disposal, permits or finish carpentry. Our calculators let you rebuild any of these numbers from your own measurements.
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All 27 calculators are free and need no account. Individual results are checked against the ranges above in the methodology section.
Washington cost questions
How much does it cost to build a house in Washington?
Mid-range construction in Washington runs about $144–$224 per square foot, so a 2,000 sq ft home lands near $287,500–$448,500. Land, site work, utility connections and landscaping are billed separately.
Is Washington an expensive place to build?
With a construction cost index of 1.15 against a national average of 1.00, costs run about 15% above the national average. The gap between cities inside the state is usually wider than the gap between states, so always price the specific metro you are building in.
What is the construction cost index in Washington?
Washington carries a planning index of 1.15 against a national average of 1.00, so a project that costs $100,000 nationally runs about $115,000 there. The index bundles local labor rates, permit fees and material delivery costs — it is a planning figure, not a bid.
Which Washington metro is the most expensive to build in?
Seattle prices highest of the markets tracked here, with an index of 1.34 against the state's 1.15. Spokane sits at the other end at 0.98, so two bids inside Washington can legitimately differ by around 37%.
What does a kitchen or bathroom remodel cost in Washington?
A major kitchen remodel typically lands between $25,300 and $36,800, and a full bathroom remodel between $10,900 and $15,500. Moving plumbing, load-bearing walls or electrical service pushes a project to the top of those ranges.
Do I need a building permit for a remodel in Washington?
Cities run their own permit review, often with separate trade permits. Projects in shoreline or critical areas may need additional environmental review before work can start.
States with similar costs
All statesReady to compare bids in Washington? Request free local quotes and check them against your own estimate.