Nassau County Home Building Costs
Building a house in Nassau County, New York costs about $317/sq ft in 2026 — roughly $634,000 for a 2,000 sq ft mid-range home (construction only, land excluded). Population: 1,370,000.
Local Market Factors
- ›Long Island suburb
- ›NYC labor spillover
- ›High demand, limited land
Cost by Home Size in Nassau County
| Home Size | Basic | Mid-Range | Premium |
|---|---|---|---|
| 500 sq ft | $117,189 | $158,500 | $215,830 |
| 1,000 sq ft | $234,378 | $317,000 | $431,660 |
| 1,500 sq ft | $351,566 | $475,500 | $647,489 |
| 2,000 sq ft | $468,755 | $634,000 | $863,319 |
| 2,500 sq ft | $585,944 | $792,500 | $1,079,149 |
| 3,000 sq ft | $703,133 | $951,000 | $1,294,979 |
| 4,000 sq ft | $937,511 | $1,268,000 | $1,726,638 |
| 5,000 sq ft | $1,171,888 | $1,585,000 | $2,158,298 |
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 1.20× applied to New York state average (which itself is 1.48× 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.