California · 17 covered places · 69 ZIP codes
Plumbers in Alameda County, CA
We cover 17 cities and towns in Alameda County, California, across 69 ZIP codes, including Oakland, Fremont, Hayward. About 1,658,000 people live in those ZIP codes. 39% of the homes were built before 1960, so galvanized pipe and old cast iron drains are common.
| Year built | Share of homes |
|---|---|
| Before 1940 | 19% |
| 1940–1959 | 20% |
| 1960–1979 | 28% |
| 1980–1999 | 19% |
| 2000 or later | 14% |
Share of housing units in the covered ZIP codes. Census ACS 2023 5-year estimates.
What goes wrong in Alameda County homes
Pre-1960 homes: galvanized pipe and cast iron
39% of homes in Alameda County's covered ZIP codes were built before 1960, 19% of them before 1940. 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.
Natural gas in most homes
66% 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.
Common plumbing work in Alameda County
City pages in Alameda County
Other covered towns in Alameda County
- Alameda (2 ZIPs)
- Albany (1 ZIP)
- Castro Valley (2 ZIPs)
- Dublin (1 ZIP)
- Emeryville (2 ZIPs)
- Livermore (2 ZIPs)
- Newark (1 ZIP)
- Piedmont (1 ZIP)
- Pleasanton (2 ZIPs)
- San Leandro (3 ZIPs)
- San Lorenzo (1 ZIP)
- Sunol (1 ZIP)
- Union City (1 ZIP)
Alameda County plumbing FAQ
Which towns in Alameda County do you cover?
17 places: Alameda, Albany, Berkeley, Castro Valley, Dublin, Emeryville, Fremont, Hayward, Livermore, Newark, Oakland, Piedmont, Pleasanton, San Leandro, San Lorenzo, Sunol, Union City. Enter your ZIP code to confirm coverage for your street.
How old are homes in Alameda County?
Across the covered ZIP codes, Census estimates put 39% of homes as built before 1960, 28% from 1960 to 1979, 19% from 1980 to 1999 and 14% in 2000 or later.
Who licenses plumbers in Alameda 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 Alameda County, combined across places and weighted by housing units. Some ZIP codes extend into neighboring counties.
Need a plumber in Alameda County?
Same-day service when a plumber is available. One call connects you with a licensed plumber who serves your ZIP.