Washington County Home Building Costs
2026 construction cost estimates for Washington County, Oregon. Population: 610,000.
County $/sq ft
$227
Oregon avg: $211
vs State Average
+8%
Local market premium
2,000 sq ft home
$454,000
Mid-range estimate
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 | $83,918 | $113,500 | $154,553 |
| 1,000 sq ft | $167,835 | $227,000 | $309,106 |
| 1,500 sq ft | $251,753 | $340,500 | $463,660 |
| 2,000 sq ft | $335,670 | $454,000 | $618,213 |
| 2,500 sq ft | $419,588 | $567,500 | $772,766 |
| 3,000 sq ft | $503,505 | $681,000 | $927,319 |
| 4,000 sq ft | $671,340 | $908,000 | $1,236,426 |
| 5,000 sq ft | $839,176 | $1,135,000 | $1,545,532 |
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 $188/sq ft).