118 eligible ZIP codes in Washington
Deck builders in Washington
Deck building, replacement and repair in Puget Sound: Seattle, the Eastside, Snohomish and Pierce Counties — including Seattle, Tacoma, Bellevue and Puyallup. Coverage is limited to the ZIP codes listed below.
Regional guidance
Planning a deck in Washington
Covered Washington ZIPs are in the Puget Sound region — Seattle, the Eastside, Snohomish County and the Tacoma area — with mild temperatures, long wet seasons and relatively dry summers.
Persistent moisture
Long wet seasons make rot, moss and mildew the main enemies of a deck; drainage and ventilation are critical.
Shade and moss
Tree cover and overcast skies slow drying, so moisture-resistant materials and regular cleaning pay off.
Slope
Hilly lots make elevated decks and careful footing design common.
Seasonal planning
The drier summer months are the preferred building window, so design and permits are often handled in winter and spring.
Materials for this climate
PVC and capped composite are well-suited to the wet climate; cedar is a regional favorite when finished and cleaned regularly. Compare options in our materials guide.
Permits and building codes
Washington adopts building codes statewide through the State Building Code Council, with cities and counties enforcing them and issuing permits. We don't publish local permit rules on this site because they vary and change — your building department is the authority.
Authoritative references
- Washington State Building Code Council — State of Washington
- Prescriptive Residential Wood Deck Construction Guide (DCA 6) — American Wood Council
- U.S. Climate Normals — NOAA National Centers for Environmental Information
How old is the housing in our Washington service area?
Across our covered Washington ZIP codes — about 1,504,023 homes — the median home was built around 1984, compared with 1985 for Washington as a whole.
21% of homes in the covered area predate 1960, 23% were built in the 1960s and 1970s, 26% in the 1980s and 1990s, and 30% since 2000. The oldest housing is in Medina (1973), Mercer Island (1973) and Mountlake Terrace (1973); the newest is in Fife (2000), Bonney Lake (1999) and Maple Valley (1998). That spread is why deck projects here range from rebuilding retrofit decks on early-20th-century homes to upgrading decks on houses built in the last decade.
| Decade built | Homes | Share |
|---|---|---|
| 2020 or later | 32,633 | 2% |
| 2010s | 199,352 | 13% |
| 2000s | 212,659 | 14% |
| 1990s | 189,088 | 13% |
| 1980s | 206,470 | 14% |
| 1970s | 186,732 | 12% |
| 1960s | 158,311 | 11% |
| 1950s | 106,020 | 7% |
| 1940s | 61,318 | 4% |
| before 1940 | 151,440 | 10% |
What deck projects are most common in our Washington service area?
Based on the age of our Washington service area's housing, the largest group of projects is likely to be replacing or rebuilding aging decks.
- Replacement and major repair: about 582,290 homes (39%) were built between 1970 and 1999, the age group whose original or early add-on decks are most likely to have worn-out framing, connectors and boards.
- Retrofit decks on older homes: about 477,089 homes (32%) predate 1970. Here the priority is confirming that add-on decks are properly attached — or rebuilding them freestanding — before any cosmetic work.
- Upgrades and expansions: about 231,985 homes (15%) were built since 2010. Their decks are usually sound but small or builder-grade, so enlarging the deck, adding stairs and switching to composite or upgraded railings are common.
How much does climate vary across our Washington service area?
Freezing days range from about 21 a year near Gig Harbor to about 70 near Maple Valley, based on the nearest NOAA stations' 1991–2020 normals.
Average annual snowfall ranges from about 0.3 inches (Gig Harbor) to 17.5 inches (Maple Valley). Days with at least 0.1 inch of precipitation range from about 86 (Mercer Island) to 129 (Maple Valley). Those differences change footing depth requirements, how often wood needs sealing and how much snow and moisture a deck must shrug off — so the right design for one Washington community is not automatically right for another.
Which decking material is most popular for Washington conditions?
Across our Washington service area, composite or well-maintained wood is the strongest general fit.
PVC and capped composite are well-suited to the wet climate; cedar is a regional favorite when finished and cleaned regularly. Individual community pages explain how local housing age and the nearest weather station's data change that recommendation.
Which Washington counties do you serve?
Covered Washington ZIP codes fall in 3 counties: King County, Pierce County and Snohomish County.
| County | Covered ZIPs | Communities |
|---|---|---|
| King County | 70 | 17 |
| Pierce County | 31 | 9 |
| Snohomish County | 17 | 9 |
Exact coverage
Every covered Washington city and ZIP code
Grouped by 3-digit ZIP prefix. Only the ZIP codes shown are eligible — neighboring ZIPs in the same city or town may not be.
ZIP prefix 980xx
- Auburn
98001, 98002, 98092
- Bellevue
98004, 98005, 98006, 98007, 98008
- Bothell
98011, 98012, 98021
- Edmonds
98020, 98026
- Federal Way
98003, 98023
- Issaquah
98027, 98029
- Kenmore
98028
- Kent
98030, 98031, 98032, 98042
- Kirkland
98033, 98034
- Lynnwood
98036, 98037, 98087
- Maple Valley
98038
- Medina
98039
- Mercer Island
98040
- Mountlake Terrace
98043
- Pacific
98047
- Redmond
98052, 98053
- Renton
98055, 98056, 98057, 98058, 98059
- Sammamish
98074, 98075
- Woodinville
98072, 98077
ZIP prefix 981xx
- Seattle
98101, 98102, 98103, 98104, 98105, 98106, 98107, 98108, 98109, 98112, 98115, 98116, 98117, 98118, 98119, 98121, 98122, 98125, 98126, 98133, 98134, 98136, 98144, 98146, 98148, 98155, 98158, 98166, 98168, 98177, 98178, 98188, 98195, 98198, 98199
ZIP prefix 982xx
- Everett
98201, 98203, 98204, 98208
- Lake Stevens
98258
- Marysville
98270
- Mukilteo
98275
- Snohomish
98290, 98296
ZIP prefix 983xx
- Bonney Lake
98391
- Gig Harbor
98335
- Milton
98354
- Puyallup
98371, 98372, 98373, 98374, 98375
- Sumner
98390
ZIP prefix 984xx
- Fife
98424
- Lakewood
98499
- Tacoma
98402, 98403, 98404, 98405, 98406, 98407, 98408, 98409, 98416, 98418, 98421, 98422, 98443, 98444, 98445, 98446, 98447, 98465, 98466
- University Place
98467
FAQs
Washington deck questions
Do you build decks everywhere in Washington?
No. We serve 118 specific ZIP codes in 34 Washington communities, concentrated in Puget Sound: Seattle, the Eastside, Snohomish and Pierce Counties. Every covered ZIP is listed on this page.
Do I need a permit for a deck in Washington?
Washington adopts building codes statewide through the State Building Code Council, with cities and counties enforcing them and issuing permits. Confirm with the building department for your address before work begins.
What decking material works best in Washington?
PVC and capped composite are well-suited to the wet climate; cedar is a regional favorite when finished and cleaned regularly.
When is the best time to build a deck in Washington?
The drier summer months are the preferred building window, so design and permits are often handled in winter and spring.
How old are homes in your Washington service area?
The median home across our covered Washington ZIP codes was built around 1984 (Census ACS 2020–2024), versus 1985 statewide.
Washington
Planning a deck in Washington?
Call (888) 555-0123 to talk with a deck specialist about your project.