Cost to Build a House in San Francisco County, California
Building a house in San Francisco County, California costs about $348/sq ft in 2026 — roughly $612,480–$779,520 for a 2,000 sq ft mid-range home (construction only, land excluded). 20 single-family homes were permitted here in 2025. Population: 875,000.
That applies a local adjustment of +28% to the California average of $272/sq ft.
What builders declared on San Francisco County permits (2025)
The average declared valuation was $1,097,538 per home, against our $696,000 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.
Local Market Factors
- ›Most expensive labor market in US
- ›Extreme permit/approval timeline
- ›Seismic requirements significant
What building in San Francisco County actually involves
Cost per square foot is one number. These are the conditions behind it.
How busy this market is
San Francisco County ranks 50th of 58 counties in California for single-family permits issued in 2025, accounting for 0% 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 52.7% of finished property value in California, which is a markup of about 111% on construction cost. For the $696,000 build above, that implies roughly $772,560 for the lot.
This is a statewide figure. Lots inside San Francisco 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.
What the trades cost
Median hourly wage, California. BLS Occupational Employment and Wage Statistics, May 2025.
Climate, spec and timing
- 2,664 heating and 1,076 cooling degree days a year in California — heating drives the mechanical budget. (NOAA, 2016-2025 average)
- The median new home in the West is 2,090 sq ft and the Census median contract price there is $176.87/sq ft, excluding land — the same basis as our estimate above. (Census Survey of Construction 2025)
- Statewide, permit filings peak in June and bottom out in November. Contractors have the most capacity in the quiet months.
- California issued 57,739 single-family permits in 2025 overall. See the 35-year state history.
Cost by Home Size in San Francisco County
| Home Size | Basic | Mid-Range | Premium |
|---|---|---|---|
| 500 sq ft | $128,649 | $174,000 | $236,936 |
| 1,000 sq ft | $257,298 | $348,000 | $473,872 |
| 1,500 sq ft | $385,947 | $522,000 | $710,809 |
| 2,000 sq ft | $514,596 | $696,000 | $947,745 |
| 2,500 sq ft | $643,245 | $870,000 | $1,184,681 |
| 3,000 sq ft | $771,894 | $1,044,000 | $1,421,617 |
| 4,000 sq ft | $1,029,191 | $1,392,000 | $1,895,489 |
| 5,000 sq ft | $1,286,489 | $1,740,000 | $2,369,362 |
Other California counties
Costs are estimates only and represent construction costs, excluding land, architect fees, permits, and landscaping. Land in California averages 52.7% of finished property value (FHFA), which adds roughly 111% on top of these construction figures.
County multiplier of 1.28× applied to the California state average (which itself is 1.45× the national average of $188/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. County permits: U.S. Census Bureau Building Permits Survey. Home values: Zillow Home Value Index. For planning purposes only.