Washington · 7 covered places · 7 ZIP codes
Plumbers in Cowlitz County, WA
We cover 7 cities and towns in Cowlitz County, Washington, across 7 ZIP codes, including Longview, Kelso, Woodland. About 111,000 people live in those ZIP codes. 31% of the homes were built before 1960, so galvanized pipe and old cast iron drains are common.
| Year built | Share of homes |
|---|---|
| Before 1940 | 14% |
| 1940–1959 | 17% |
| 1960–1979 | 27% |
| 1980–1999 | 23% |
| 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 |
|---|---|---|
| Longview | 50,845 | 38% |
| Kelso | 26,948 | 36% |
| Woodland | 16,765 | 11% |
| Castle Rock | 9,367 | 22% |
| Kalama | 7,020 | 17% |
| Ryderwood | 383 | 57% |
| Cougar | 81 | 5% |
What goes wrong in Cowlitz County homes
Mostly electric homes
85% of occupied homes here heat with electricity, and electric tank water heaters are the norm. Failed elements and thermostats are repairable, but tanks that leak need replacement. Heat pump water heaters are an efficient replacement where there's space and airflow.
Pre-1960 homes: galvanized pipe and cast iron
31% of homes in Cowlitz County's covered ZIP codes were built before 1960, 14% 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.
Winter freezes
59% 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 Cowlitz County
Other covered towns in Cowlitz County
- Castle Rock (1 ZIP)
- Cougar (1 ZIP)
- Kalama (1 ZIP)
- Kelso (1 ZIP)
- Longview (1 ZIP)
- Ryderwood (1 ZIP)
- Woodland (1 ZIP)
Cowlitz County plumbing FAQ
Which towns in Cowlitz County do you cover?
7 places: Castle Rock, Cougar, Kalama, Kelso, Longview, Ryderwood, Woodland. Enter your ZIP code to confirm coverage for your street.
How old are homes in Cowlitz County?
Across the covered ZIP codes, Census estimates put 31% of homes as built before 1960, 27% from 1960 to 1979, 23% from 1980 to 1999 and 18% in 2000 or later.
Who licenses plumbers in Cowlitz 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 Cowlitz County, combined across places and weighted by housing units. Some ZIP codes extend into neighboring counties.
Need a plumber in Cowlitz County?
Same-day service when a plumber is available. One call connects you with a licensed plumber who serves your ZIP.