NAICS 238220 · California overview
HVAC, Plumbing & Mechanical Contractors in San Diego County
San Diego County had 1,072 HVAC & Plumbing establishments in 2023, ranking 2 of 55 California counties and accounting for 9.2% of the statewide total.
- Establishments (2023)
- 1,072
- Rank 2 of 55 counties
- Employees
- 12,748
- Mid-March employment
- Annual payroll
- $1.0B
- All establishments
- Per 10k residents
- 3.3
- 3,282,248 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
- 1,222
- 2026Q1
- Employment
- 12,527
- Quarter-end level
- Average weekly wage
- $1,661
- Per covered worker
- Quarterly trend
- +5.2%
- 2025Q2 to 2026Q1
0.96 location quotient. HVAC & Plumbing is about as concentrated in San Diego 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 HVAC & Plumbing in San Diego County. 222 of 1,072 establishments (21%) employ 10 or more people, the practical floor for most acquisition financing.
| Employees | Establishments | Share | Distribution |
|---|---|---|---|
| 1-4 | 650 | 60.6% | |
| 5-9 | 196 | 18.3% | |
| 10-19 | 113 | 10.5% | |
| 20-49 | 55 | 5.1% | |
| 50-99 | 33 | 3.1% | |
| 100-249 | 21 | 2.0% |
Establishment trend
Year-over-year establishment counts, County Business Patterns. Net growth of 10.3% since 2020.
| Year | Establishments | Change |
|---|---|---|
| 2020 | 972 | n/a |
| 2021 | 1,001 | +29 |
| 2022 | 1,062 | +61 |
| 2023 | 1,072 | +10 |
How this market compares
San Diego 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.
Close to the state median for this industry. Provision is roughly what the population would predict.
- Vs state median
- +10%
- Businesses per resident
- Rank by count
- #2
- of 55 counties
- Rank by density
- #23
- of 55 ranked
- Since 2020
- +10%
- Change in establishments
Density compares hvac, plumbing & mechanical contractors provision per resident. It does not measure revenue, profitability or whether a market is worth entering.
Business size mix
San Diego tracks the California size distribution closely.
| Share of establishments | San Diego | California | Difference |
|---|---|---|---|
| Under 5 employeesOwner-operated, often no management layer | 60.6% | 60.9% | -0.3% |
| 5 to 49 employeesThe range most individual buyers target | 34.0% | 35.1% | -1.2% |
| 10 or more employeesPractical floor for acquisition financing | 20.7% | 20.2% | +0.5% |
What acquirers look at
Recurring maintenance contracts, emergency pricing power and licensed-technician scarcity make the mechanical trades the most consolidated category in small business. Owner age skews high and private equity has been rolling them up since 2019. Plumbing is frequently acquired as a bolt-on to an existing HVAC platform to share dispatch and trucks.
Cities in San Diego
The figures above cover the county as a whole. These are the places within it.
Other industries in San Diego
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.