NAICS 541310 · California overview
Architectural Services in Sonoma County
Sonoma County had 66 Architecture establishments in 2023, ranking 13 of 33 California counties and accounting for 1.8% of the statewide total.
- Establishments (2023)
- 66
- Rank 13 of 33 counties
- Employees
- 291
- Mid-March employment
- Annual payroll
- $29M
- All establishments
- Per 10k residents
- 1.4
- 486,444 residents
More recent reading
BLS QCEW, 2026Q1The figures above are County Business Patterns, which carries the size distribution but runs about two years behind. The Bureau of Labor Statistics publishes quarterly, so this is the same industry roughly 3 years later. The two count different universes, Census counts establishments with paid employees in the March pay period and BLS counts worksites covered by unemployment insurance during the quarter, so the numbers are not directly comparable and either can be the larger.
- Establishments
- 69
- 2026Q1
- Employment
- 302
- Quarter-end level
- Average weekly wage
- $1,971
- Per covered worker
- Quarterly trend
- +1.5%
- 2025Q2 to 2026Q1
1.16 location quotient. Architecture is about as concentrated in Sonoma County as it is nationally.
Computed by the Bureau of Labor Statistics, not derived here. Above 1.0 means the industry is a larger share of local employment than of national employment.
Establishments by size
Employee-count distribution for Architecture in Sonoma County. 4 of 66 establishments (6%) employ 10 or more people, the practical floor for most acquisition financing.
| Employees | Establishments | Share | Distribution |
|---|---|---|---|
| 1-4 | 51 | 77.3% | |
| 5-9 | 9 | 13.6% | |
| 10-19 | 4 | 6.1% |
Establishment trend
Year-over-year establishment counts, County Business Patterns. Net growth of 11.9% since 2020.
| Year | Establishments | Change |
|---|---|---|
| 2020 | 59 | n/a |
| 2021 | 60 | +1 |
| 2022 | 69 | +9 |
| 2023 | 66 | -3 |
How this market compares
Sonoma County against every other county in California on the same measure. The median excludes places under 2,000 residents, where per-capita figures are arithmetically true but analytically useless.
Well above the state median for this industry. A crowded market: expect established competitors and price pressure, but also a deeper pool of businesses to buy.
- Vs state median
- +74%
- Businesses per resident
- Rank by count
- #13
- of 33 counties
- Rank by density
- #7
- of 33 ranked
- Since 2020
- +12%
- Change in establishments
Density compares architectural services provision per resident. It does not measure revenue, profitability or whether a market is worth entering.
Business size mix
Sonoma is more fragmented than California as a whole: a larger share of very small operators. Fragmented markets are where roll-ups are assembled, and where an owner nearing retirement has no obvious internal buyer.
| Share of establishments | Sonoma | California | Difference |
|---|---|---|---|
| Under 5 employeesOwner-operated, often no management layer | 77.3% | 66.2% | +11.1% |
| 5 to 49 employeesThe range most individual buyers target | 19.7% | 30.2% | -10.5% |
| 10 or more employeesPractical floor for acquisition financing | 6.1% | 16.0% | -9.9% |
What acquirers look at
Reputation and principal relationships rarely survive an owner exit. Firms with public-sector master service agreements are the exception worth pursuing.
Cities in Sonoma
The figures above cover the county as a whole. These are the places within it.
Other industries in Sonoma
Sources
- U.S. Census Bureau, 2023 County Business Patterns. Establishment counts, employment and annual payroll by NAICS. Retrieved 2026-09-08.
- U.S. Bureau of Labor Statistics, Quarterly Census of Employment and Wages (2026Q1). Quarterly establishment counts and employment for employers covered by unemployment insurance. Retrieved 2026-09-08.