California · 6 covered places · 8 ZIP codes
Plumbers in Napa County, CA
We cover 6 cities and towns in Napa County, California, across 8 ZIP codes, including Napa, American Canyon, Saint Helena. About 135,000 people live in those ZIP codes. 27% of the homes were built before 1960, so galvanized pipe and old cast iron drains are common.
| Year built | Share of homes |
|---|---|
| Before 1940 | 9% |
| 1940–1959 | 18% |
| 1960–1979 | 31% |
| 1980–1999 | 25% |
| 2000 or later | 18% |
Share of housing units in the covered ZIP codes. Census ACS 2023 5-year estimates.
| Place | Residents in covered ZIPs | Built before 1960 |
|---|---|---|
| Napa | 92,380 | 29% |
| American Canyon | 21,852 | 10% |
| Saint Helena | 7,646 | 34% |
| Calistoga | 6,921 | 27% |
| Yountville | 3,388 | 14% |
| Angwin | 3,298 | 40% |
What goes wrong in Napa County homes
Natural gas in most homes
64% of occupied homes here heat with utility gas, so gas water heaters, ranges and dryers are common. That means gas line extensions for new appliances, flexible connector replacements and venting checks when a water heater is swapped. If you smell gas, leave first and call the gas utility from outside. See gas line repair.
1960s and 70s homes reaching end of life
31% of the housing here dates from 1960 to 1979. Original copper supply lines in those homes are now 45 to 65 years old, and cast iron drains of that age scale up inside and crack. Seized shutoff valves, pinhole leaks and recurring main-line clogs are common calls. A camera inspection shows the condition of the sewer line before anyone digs.
Pre-1960 homes: galvanized pipe and cast iron
27% of homes in Napa County's covered ZIP codes were built before 1960. Houses that old often still have galvanized steel supply lines that rust closed from the inside, and cast iron or clay sewer pipe that cracks and lets roots in. Weak pressure at upstairs fixtures, brown water after a shutoff and slow drains are the usual clues. Typical fixes are whole-house repiping and a sewer camera inspection.
Common plumbing work in Napa County
Other covered towns in Napa County
- American Canyon (1 ZIP)
- Angwin (1 ZIP)
- Calistoga (1 ZIP)
- Napa (3 ZIPs)
- Saint Helena (1 ZIP)
- Yountville (1 ZIP)
Napa County plumbing FAQ
Which towns in Napa County do you cover?
6 places: American Canyon, Angwin, Calistoga, Napa, Saint Helena, Yountville. Enter your ZIP code to confirm coverage for your street.
How old are homes in Napa County?
Across the covered ZIP codes, Census estimates put 27% of homes as built before 1960, 31% from 1960 to 1979, 25% from 1980 to 1999 and 18% in 2000 or later.
Who licenses plumbers in Napa County, CA?
The Contractors State License Board (CSLB) licenses plumbing contractors under the C-36 classification, and its online lookup shows license status.
Housing and heating figures are US Census Bureau ACS 2023 5-year estimates for the ZIP code areas we cover in Napa County, combined across places and weighted by housing units. Some ZIP codes extend into neighboring counties.
Need a plumber in Napa County?
Same-day service when a plumber is available. One call connects you with a licensed plumber who serves your ZIP.