Washington · 8 covered places · 11 ZIP codes
Plumbers in Whatcom County, WA
We cover 8 cities and towns in Whatcom County, Washington, across 11 ZIP codes, including Bellingham, Ferndale, Lynden. About 209,000 people live in those ZIP codes. Most homes date from 1980 to 1999, old enough that original water heaters, valves and drains are wearing out.
| Year built | Share of homes |
|---|---|
| Before 1940 | 12% |
| 1940–1959 | 6% |
| 1960–1979 | 22% |
| 1980–1999 | 28% |
| 2000 or later | 31% |
Share of housing units in the covered ZIP codes. Census ACS 2023 5-year estimates.
| Place | Residents in covered ZIPs | Built before 1960 |
|---|---|---|
| Bellingham | 130,013 | 20% |
| Ferndale | 28,061 | 11% |
| Lynden | 22,365 | 16% |
| Blaine | 18,757 | 13% |
| Custer | 3,208 | 10% |
| Sumas | 3,135 | 21% |
| Deming | 3,080 | 16% |
| Acme | 558 | 42% |
What goes wrong in Whatcom County homes
1980s and 90s construction and polybutylene
28% of homes were built between 1980 and 1999. Polybutylene supply pipe was installed widely in US homes from about 1978 to 1995, so houses from these years are worth checking for gray plastic pipe stamped PB2110, usually visible at the water heater or under sinks. Insurers and buyers often ask about it. See polybutylene replacement.
Winter freezes
40% of homes here were built before 1980, when pipes were more often run through exterior walls and uninsulated crawl spaces. In a cold Washington winter those are the lines that freeze and split. See frozen and burst pipe repair.
Common plumbing work in Whatcom County
Other covered towns in Whatcom County
- Acme (1 ZIP)
- Bellingham (4 ZIPs)
- Blaine (1 ZIP)
- Custer (1 ZIP)
- Deming (1 ZIP)
- Ferndale (1 ZIP)
- Lynden (1 ZIP)
- Sumas (1 ZIP)
Whatcom County plumbing FAQ
Which towns in Whatcom County do you cover?
8 places: Acme, Bellingham, Blaine, Custer, Deming, Ferndale, Lynden, Sumas. Enter your ZIP code to confirm coverage for your street.
How old are homes in Whatcom County?
Across the covered ZIP codes, Census estimates put 18% of homes as built before 1960, 22% from 1960 to 1979, 28% from 1980 to 1999 and 31% in 2000 or later.
Who licenses plumbers in Whatcom County, WA?
The Washington State Department of Labor & Industries (L&I) certifies plumbers and registers contractors.
Housing and heating figures are US Census Bureau ACS 2023 5-year estimates for the ZIP code areas we cover in Whatcom County, combined across places and weighted by housing units. Some ZIP codes extend into neighboring counties.
Need a plumber in Whatcom County?
Same-day service when a plumber is available. One call connects you with a licensed plumber who serves your ZIP.