Multnomah County Home Building Costs
2026 construction cost estimates for Multnomah County, Oregon. Population: 815,000.
County $/sq ft
$242
Oregon avg: $211
vs State Average
+15%
Local market premium
2,000 sq ft home
$484,000
Mid-range estimate
Local Market Factors
- ›Portland
- ›Most expensive in state
- ›Strict green building codes
Cost by Home Size in Multnomah County
| Home Size | Basic | Mid-Range | Premium |
|---|---|---|---|
| 500 sq ft | $89,463 | $121,000 | $164,766 |
| 1,000 sq ft | $178,926 | $242,000 | $329,532 |
| 1,500 sq ft | $268,388 | $363,000 | $494,298 |
| 2,000 sq ft | $357,851 | $484,000 | $659,064 |
| 2,500 sq ft | $447,314 | $605,000 | $823,830 |
| 3,000 sq ft | $536,777 | $726,000 | $988,596 |
| 4,000 sq ft | $715,702 | $968,000 | $1,318,128 |
| 5,000 sq ft | $894,628 | $1,210,000 | $1,647,660 |
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 1.15× applied to Oregon state average (which itself is 1.12× the national average of $188/sq ft).