Washington County Home Building Costs
Building a house in Washington County, Oregon costs about $216/sq ft in 2026 — roughly $432,000 for a 2,000 sq ft mid-range home (construction only, land excluded). Population: 610,000.
Local Market Factors
- ›Portland suburb/Silicon Forest
- ›Tech industry drives costs
Cost by Home Size in Washington County
| Home Size | Basic | Mid-Range | Premium |
|---|---|---|---|
| 500 sq ft | $79,851 | $108,000 | $147,064 |
| 1,000 sq ft | $159,702 | $216,000 | $294,128 |
| 1,500 sq ft | $239,553 | $324,000 | $441,191 |
| 2,000 sq ft | $319,404 | $432,000 | $588,255 |
| 2,500 sq ft | $399,255 | $540,000 | $735,319 |
| 3,000 sq ft | $479,106 | $648,000 | $882,383 |
| 4,000 sq ft | $638,809 | $864,000 | $1,176,511 |
| 5,000 sq ft | $798,511 | $1,080,000 | $1,470,638 |
Costs are estimates only and represent construction costs, excluding land, architect fees, permits, and landscaping. Add 30–40% to these figures for total project cost.
County multiplier of 1.08× applied to Oregon state average (which itself is 1.12× the national average of $179/sq ft).
Cost data: HouseBuildCalc Permit Cost Index (876,000+ building permits, 1,700+ ZIP codes), U.S. Census Bureau Survey of Construction, BLS Producer Price Index, NAHB Cost of Constructing a Home (published summaries). County-level multipliers are estimates derived from regional market data. For planning purposes only.