Multnomah County Home Building Costs
Building a house in Multnomah County, Oregon costs about $230/sq ft in 2026 — roughly $460,000 for a 2,000 sq ft mid-range home (construction only, land excluded). Population: 815,000.
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 | $85,027 | $115,000 | $156,596 |
| 1,000 sq ft | $170,053 | $230,000 | $313,191 |
| 1,500 sq ft | $255,080 | $345,000 | $469,787 |
| 2,000 sq ft | $340,106 | $460,000 | $626,383 |
| 2,500 sq ft | $425,133 | $575,000 | $782,979 |
| 3,000 sq ft | $510,160 | $690,000 | $939,574 |
| 4,000 sq ft | $680,213 | $920,000 | $1,252,766 |
| 5,000 sq ft | $850,266 | $1,150,000 | $1,565,957 |
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 $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.