Cost to Build a House in Nantucket County, Massachusetts
Building a house in Nantucket County, Massachusetts costs about $253/sq ft in 2026 — roughly $445,280–$566,720 for a 2,000 sq ft mid-range home (construction only, land excluded). 203 single-family homes were permitted here in 2025, and the typical existing home is worth $3,494,733.
That is the Massachusetts statewide rate: no public source measures construction cost county by county, so we don't invent a local premium. What does differ by county is measured below.
How much building happens in Nantucket County
Single-family homes permitted each year, 2000–2025. 2025 is highlighted; the 2008–2011 crash years are darker.
Nantucket County has recovered most of its pre-crash building volume. Builders are active here and it should be possible to get several competing bids.
U.S. Census Bureau Building Permits Survey, county annual files 2000–2025 (1-unit structures, total including imputation).
Build or buy in Nantucket County?
Unusually, building a median-size new home in Nantucket County costs about $2,284,369 less than buying the typical existing one. That gap is narrower than the Massachusetts average of +74.4%, because existing homes here are pricier than in much of the state — which makes Nantucket County one of the stronger cases for building in Massachusetts.
The two sides are not the same product: the build is brand new at the median new-home size for the Northeast, the existing home is typically older and smaller. Lot cost uses Massachusetts's average land share, and local lot prices can be well above or below it. Full Massachusetts build-vs-buy comparison
Existing home value: Zillow Home Value Index, single-family, middle tier (2026-08) — an index of typical value, not a median sale price. Land: FHFA Working Paper 19-01.
What builders declared on Nantucket County permits (2025)
The average declared valuation was $1,111,241 per home, against our $506,000 estimate for a 2,000 sq ft mid-range build. The two measure different things: builders declare a valuation for permit-fee purposes, which routinely understates finished cost, and permits cover homes of every size and finish level. We show both because quoting only the flattering one would be dishonest.
Source: U.S. Census Bureau Building Permits Survey, 2025 annual data.
What building in Nantucket County actually involves
Cost per square foot is one number. These are the conditions behind it.
How busy this market is
Nantucket County ranks 10th of 14 counties in Massachusetts for single-family permits issued in 2025, accounting for 4% of all the single-family homes permitted statewide that year.
That is a quieter market. Fewer active builders can mean less competitive bidding and longer waits for specialised trades.
U.S. Census Bureau Building Permits Survey, co2025a.txt (2025).
What land adds on top
Land averages 48.6% of finished property value in Massachusetts, which is a markup of about 95% on construction cost. For the $506,000 build above, that implies roughly $480,700 for the lot.
This is a statewide figure. Lots inside Nantucket County's built-up areas will run above it and rural parcels below, so treat it as an order of magnitude rather than a budget line.
FHFA Working Paper 19-01 land values.
Statewide factors
Trade wages, climate load, energy code and permit seasonality are set at state level, so they are the same for every Massachusetts county. See them on the Massachusetts page.
Cost by Home Size in Nantucket County
| Home Size | Basic | Mid-Range | Premium |
|---|---|---|---|
| 500 sq ft | $93,529 | $126,500 | $172,255 |
| 1,000 sq ft | $187,059 | $253,000 | $344,511 |
| 1,500 sq ft | $280,588 | $379,500 | $516,766 |
| 2,000 sq ft | $374,117 | $506,000 | $689,021 |
| 2,500 sq ft | $467,646 | $632,500 | $861,277 |
| 3,000 sq ft | $561,176 | $759,000 | $1,033,532 |
| 4,000 sq ft | $748,234 | $1,012,000 | $1,378,043 |
| 5,000 sq ft | $935,293 | $1,265,000 | $1,722,553 |
Other Massachusetts counties
Costs are estimates only and represent construction costs, excluding land, architect fees, permits, and landscaping. Land in Massachusetts averages 48.6% of finished property value (FHFA), which adds roughly 95% on top of these construction figures.
Priced at the Massachusetts state average, which is 1.35× the national average of $188/sq ft. Permit and home-value figures are specific to Nantucket County.
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 permits: U.S. Census Bureau Building Permits Survey. Home values: Zillow Home Value Index. For planning purposes only.