Home services · County · California
HVAC and plumbing companies in Marin County, CA
How Marin County, CA compares with other counties and the U.S. for HVAC and plumbing companies: competitors, household spending, official counts and growth.
Groundwork market score · out of 100
Score 61 out of 100: Upper middle
Ranked #449 of 1,707 scored counties
#18 of 49 scored counties in California
- Listings
- 65
- 4 chain locations (6%)
- Official establishments
- 100
- +8.7% since 2019
- Household spending a year
- $411.3M
- On home repairs, maintenance and insurance · $3,992 a household
- Spending per listing
- $6.3M
- 33% above the U.S.
- Listings per 10k households
- 6.3
- In line with the U.S.
- Population, 2025
- 253,694
- −2.9% since 2020
See the HVAC and plumbing companies around any address in Marin County
The site report maps the HVAC and plumbing companies on map listings near the address, by name and distance, and sizes the households and spending around it. Or open the report at the center of Marin County. Signed out, you see a blurred preview; on an account, each report is one action.
Free10 actions over 3 days, no cardSurvey estimates 2020–2024 · population estimates 2025 · official business counts 2023 · map listings September 2026 · Data credits · How we measure
What this means
Map listings as of September 2026 show 65 HVAC and plumbing companies in Marin County. 4 of them (6%) are chain locations, against 4% across the U.S. Per 10,000 households, that is 6.3, in line with the U.S. rate of 6.3.
Households in Marin County spend about $411.3M a year on home repairs, maintenance and insurance, or $3,992 per household, 32% above the U.S. average. Spread across 65 HVAC and plumbing companies, that is $6.3M per company, 33% above the U.S. figure of $4.8M. That spending covers all home repairs, maintenance and insurance, which HVAC and plumbing companies share with other businesses in the trade.
In 2023, official counts showed 100 businesses with payroll in Marin County classed as plumbing, heating and air-conditioning contractors, up 8.7% from 2019. That is one for every 1,030 households, against one for every 1,162 across the U.S. Since fiscal 2022, 2 SBA-backed loans worth $1.2M have gone to businesses classed as plumbing, heating and air-conditioning contractors in Marin County.
Between 2020 and 2025, the population of Marin County declined 2.9%, against +3.1% for the U.S. For HVAC and plumbing companies, Marin County has a Groundwork market score of 61 (upper middle): #449 of 1,707 scored counties and #18 of 49 scored counties in California.
How Marin County compares
The same measures for California and the whole U.S. Spending per listing divides a year of household spending on all home repairs, maintenance and insurance by the HVAC and plumbing companies counted, so it measures the demand for each competitor, not any business’s revenue. Households per establishment does the same with the official count.
| Measure | Marin County | California | U.S. |
|---|---|---|---|
| Listings per 10k households | 6.3 | 6.2 | 6.3 |
| Spending per listing | $6.3M | $5.2M | $4.8M |
| Households per official establishment | 1,030 | 1,159 | 1,162 |
| Official establishment growth, 2019–2023 | +8.7% | +10.4% | +7.6% |
| Population growth, 2020–2025 | −2.9% | −0.4% | +3.1% |
| Spending per household on home repairs, maintenance and insurance | $3,992 | $3,240 | $3,018 |
| Median household income | $149,091 | $99,122 | $80,734 |
| Groundwork market score | 61 | 54 |
Official counts and lending
Businesses
- Official establishments, 2019 to 2023
- 92 → 100+8.7% over the period
- Employees, 2023
- 943
- Annual payroll, 2023
- $87.6M
- One-person businesses, 2023
- Not publishedNot published for this business type
- Map listings, September 2026
- 654 chain locations
- Listings at the U.S. rate for this spending
- 86The U.S. ratio of listings to household spending, applied here
SBA-backed loans since fiscal 2022
- Loans
- 2
- Amount
- $1.2M
SBA-backed loans to businesses classed as plumbing, heating and air-conditioning contractors in Marin County, through June 2026, placed by the borrower’s ZIP code. Official establishments are businesses with payroll; the official counts leave out places with fewer than 3.
Population and households in Marin County
- Population, 2025 estimate
- 253,694−2.9% since 2020
- Households
- 103,018
- Median age
- 47.7
- Homes lived in by their owners
- 65%
- Vehicles per household
- 1.8
- Land area
- 520 sq. mi.
- People per square mile
- 496
- Median household income
- $149,091+29.4% vs. 2015–2019, before inflation
- Average household income
- $232,579
- Median home value
- $1,507,300
- Jobs located here
- 110,704
- Daytime population
- 260,594Residents who don’t work, plus everyone whose job is here
Looking at a specific site in Marin County?
These figures cover the whole county. A site report draws rings around one address and counts what’s inside them: households, spending, jobs, and the HVAC and plumbing companies on map listings by name and distance.
Or open the report at the center of Marin County. Signed out, you see a blurred preview; on an account, each report is one action.
Free10 actions over 3 days, no cardHVAC and plumbing across California
Every California market ranked →The highest-scoring counties in California for HVAC and plumbing companies, numbered among those based in California, with Marin County marked.
Top counties in California
| Market | Score | Listings | Per 10k households | Spending per listing | Population growth | U.S. rank |
|---|---|---|---|---|---|---|
| 1Yolo County, CA | 81 | 34 | 4.4 | $6.9M | +3.1% | #52 of 1,707 |
| 2San Francisco County, CA | 78 | 99 | 2.7 | $14M | −5.6% | #73 of 1,707 |
| 3Amador County, CA | 76 | 6 | 3.7 | $7.7M | +3.2% | #96 of 1,707 |
| 4San Joaquin County, CA | 74 | 130 | 5.3 | $5.7M | +5.5% | #136 of 1,707 |
| 5Alameda County, CA | 73 | 317 | 5.3 | $7M | −2.6% | #149 of 1,707 |
| 6Solano County, CA | 73 | 79 | 5.0 | $6.3M | +0.6% | #151 of 1,707 |
| 7Santa Clara County, CA | 72 | 388 | 5.9 | $7M | −0.9% | #165 of 1,707 |
| 8Contra Costa County, CA | 72 | 233 | 5.6 | $6.5M | +0.3% | #166 of 1,707 |
| 9Merced County, CA | 69 | 34 | 4.0 | $6.5M | +5.1% | #227 of 1,707 |
| 10Madera County, CA | 66 | 20 | 4.4 | $6.3M | +7.4% | #291 of 1,707 |
| 18Marin County, CA | 61 | 65 | 6.3 | $6.3M | −2.9% | #449 of 1,707 |
Other business types in Marin County
Each with its Groundwork market score here, out of 100, where it has one.
Food and drink
Groceries and convenience
Auto
Beauty and personal care
Fitness and classes
Health care
Child care
Clothing and laundry
Home services
- Home repair trades60
- HVAC and plumbing61
- Electricians57
- Roofing and gutters72
- Lawn, cleaning and pest control45
- Landscaping and lawn care48
- House cleaning39
- Pest control72
Real estate
Funeral services
Questions
How many HVAC and plumbing companies are in Marin County, CA?
There are 65 HVAC and plumbing companies on map listings in Marin County as of September 2026. 4 of them (6%) are chain locations. The listings count heating and air-conditioning companies and plumbers. Official counts show 100 businesses with payroll classed as plumbing, heating and air-conditioning contractors in 2023, up 8.7% from 2019.
How much do households in Marin County, CA spend on home repairs, maintenance and insurance?
About $411.3M a year, or $3,992 per household. That is 32% above the U.S. average (an index of 132, where 100 is the U.S. average). Spread across the 65 HVAC and plumbing companies on map listings, it comes to $6.3M per company. The spending figure covers all home repairs, maintenance and insurance, not only HVAC and plumbing companies. It is estimated from the incomes of the 103,018 households in Marin County and national spending patterns by income.
How does Marin County, CA compare with the U.S. for HVAC and plumbing companies?
Marin County has 6.3 HVAC and plumbing companies per 10,000 households, in line with the U.S. rate of 6.3. Spending per company is $6.3M, 33% above the U.S. figure of $4.8M. At the national ratio of HVAC and plumbing companies to household spending, Marin County would have about 86, against 65 on map listings. There is one business with payroll in the industry for every 1,030 households, against one for every 1,162 across the U.S. The official count rose 8.7% from 2019 to 2023, against +7.6% for the U.S.
How fast is Marin County, CA growing?
Population estimates put Marin County at 253,694 people in 2025, down 2.9% since 2020, against +3.1% for the U.S. It has 103,018 households. The median household income in Marin County is $149,091 a year, 85% above the U.S. median of $80,734. That rose 29.4% from the 2015–2019 survey, before inflation.
What is the Groundwork market score?
The Groundwork market score runs from 0 to 100 and compares a market with others of its kind for one business type: states with states, metro areas with metro areas, small-town markets and counties with their own. It weighs household spending per competitor (35%), households per business with payroll (25%), population growth (20%) and spending power (20%), each ranked against those peers. A higher score means that, taken together, the market has more household spending and more households for each business already there, faster population growth and more spending per household than similar markets. It describes a market, not any one site or deal. Marin County scores 61 for HVAC and plumbing companies (upper middle), #449 of 1,707 scored counties.
How can I see the market around a specific site?
Run a Groundwork site report on an address in Marin County. It maps the HVAC and plumbing companies on map listings near the site and sizes the households and spending within the distance you choose. New accounts get 10 actions over 3 days, no card.
How the score works · Top markets for HVAC and plumbing companies · All 56 business types in Marin County
Screening a site or an acquisition in Marin County?
A site report maps the competitors on map listings near an address and sizes the households and spending around it.
The button opens the report at the center of Marin County. Signed out, you see a blurred preview; on an account, each report is one action.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Figures are estimates for research only. Not investment or real estate advice.