Water damage restoration · Issaquah, Washington
Water damage restoration in Issaquah, WA
Burst pipe, failed water heater, or storm water? Issaquah-area ZIPs: 243 flood claims since 1979[1]; 17% of homes built before 1980[2]. Request help from local restoration crews. Issaquah, in King County — ZIPs 98027, 98029, counts 39,423 residents (2025 estimate)[3].
Request helpIs this a water-damage emergency?
Answer a few questions for a plan for the next hour.
Issaquah water damage snapshot: the key figures
- Population (2025 est.)
- 39,423[3]-1.6% since 2020
- County
- King[3]
- Land area
- 12.1 sq mi[4]
- Flood-insurance (NFIP) claims, local ZIPs
- 243 since 1979[1]$5,889,175 paid across 193 claims · ZIP 98027, 98029
- Flood & flash-flood reports within 10 mi
- 1[5]2016–2025 · latest Jan 6, 2022
- Federal disaster declarations incl. flooding, King Co.
- 11[6]of 18 total declarations
- Homes built before 1980
- 17%[2]the 2nd-lowest share of the 15 Seattle-area suburbs we cover
- Households renting
- 43%[2]2020–2024
Reading the Issaquah data for water damage
Issaquah is one of the most established suburbs tracked here — 39,423 people (2025 estimate), down just 1.6% since 2020[3]. On the map that's 12.1 square miles holding 3,250 residents per square mile, the 12th densest of the suburbs here; it sits entirely in King County, with ZIP codes 98027, 98029[4].
Issaquah mixes 25% of homes built since 2010 and 17% before 1980[2]: new supply lines and water heaters in one house, aging pipe and original valves in the next — so where a leak starts depends a lot on the address.
Mail to Issaquah goes through 2 ZIP codes — 98027 (67% of the city's land), 98029 (33% of the city's land)[7].
The closest tracked neighbours are Sammamish (3.5 mi N), Bellevue (6.2 mi NW) and Renton (8.2 mi SW)[4].
243 flood-insurance claims have come from Issaquah-area ZIP codes (98027, 98029) since 1979, and $5,889,175 has been paid on them (about $30,514 per paid claim)[1]. 1990 was the worst year, with 64 claims. That is the most of the 15 Seattle-area suburbs we cover; for comparison, Sammamish (27), Bellevue (77), and Renton (66). Outside water is a real part of the picture here. Of the 242 claims rated in a flood zone, 158 were in FEMA's high-risk areas (zones A or V) and 84 outside them (zones B, C or X)[1][8] — flooding here is not only a high-risk-zone problem.
By month of loss, Issaquah-area flood claims cluster in January (80), February (65), and November (65) — 210 of 243 dated claims[1].
Within 10 miles of central Issaquah, weather observers filed 1 flood, flash-flood or heavy-rain report in 2016–2025[5]. Countywide: 11 flood declarations since 2000, latest Severe Storms, Straight-Line Winds, Flooding, Landslides, and Mudslides (DR-4906, 2025)[6]. Nearby: Sammamish (1), Bellevue (3), and Renton (2).
17% of Issaquah's 17,542 housing units predate 1980[2] — the 2nd-lowest share of the 15 Seattle-area suburbs we cover (Sammamish (13%), Bellevue (47%), and Renton (39%)). In newer houses, check fittings, washer hoses and the water-heater pan first — and any builder warranty.
43% of Issaquah households rent[2]: tenants should report leaks to the landlord in writing, with photos.
Out of the 15 suburbs on this site, Issaquah has the most NFIP flood claims (243)[1], the newest housing (by median year built) (2002)[2], and the 2nd-lowest pre-1980 housing share (17%)[2].
How a leak spreads inside a wall
Leaked water spreads outward and wicks up drywall the longer it runs.
water damage help in Issaquah: what to do next
Your request reaches Water damage restoration contractors who serve Issaquah (ZIP codes 98027, 98029).
Before you call: what a restoration crew does first
Shared walls and ceilings: Issaquah homes by building type
65%[2] of Issaquah's homes share walls, floors or ceilings with a neighbour (multi-unit buildings alone: 50%, the 2nd-highest multi-unit share of the 15 Seattle-area suburbs we cover). Water crosses those lines: in an attached or stacked unit, tell the neighbour and the association or landlord right away, and check whose policy covers which part of the damage.
After detached houses, the biggest group is attached house (townhouse, rowhouse): 2,646 of 17,542 housing units[2].
| Building type | Units | Share | Margin of error |
|---|---|---|---|
| Detached house | 6,133 | 35.0% | ±485 |
| Attached house (townhouse, rowhouse) | 2,646 | 15.1% | ±327 |
| Duplex (2 units) | 357 | 2.0% | ±147 |
| 3–4 units | 878 | 5.0% | ±247 |
| 5–9 units | 1,493 | 8.5% | ±370 |
| 10–19 units | 1,896 | 10.8% | ±393 |
| 20–49 units | 1,602 | 9.1% | ±309 |
| 50 or more units | 2,537 | 14.5% | ±473 |
Margins of error are the Census Bureau’s 90% intervals; small categories in small cities are rough.
The Issaquah numbers behind this page
| Measure | Issaquah | Median of 15 | Difference |
|---|---|---|---|
| NFIP flood claims (area ZIPs) | 243 | 46 | 197 more |
| Built before 1980 | 17% | 39% | 22 pts lower |
| Median home value | $963,000 | $686,900 | 40% higher |
| Renter-occupied | 43% | 45% | 2 pts lower |
| Owner-occupied | 57% | 55% | 2 pts higher |
| Median year built | 2002 | 1985 | 17 years newer |
| Flood reports (10 mi) | 1 | 1 | same as median |
Sorted by largest difference. Each median is the middle value across the covered Seattle-area suburbs, from the same sources.
| City | NFIP claims | Flood reports ≤10 mi | Built before 1980 | Renting |
|---|---|---|---|---|
| Issaquah | 243 | 1 | 17% | 43% |
| Sammamish 3.5 mi | 27 | 1 | 13% | 17% |
| Bellevue 6.2 mi | 77 | 3 | 47% | 48% |
| Renton 8.2 mi | 66 | 2 | 39% | 46% |
| Redmond 9.7 mi | 17 | 3 | 26% | 57% |
| Kirkland 12.8 mi | 29 | 3 | 44% | 39% |
| ZIP | Claims | Paid | Busiest year | Outside high-risk zones |
|---|---|---|---|---|
| 98027 | 240 | $5,817,107 | 1990 (64) | 82 of 239 |
| 98029 | 3 | $72,068 | 1996 (2) | 2 of 3 |
ZIPs extend past city limits. Outside high-risk zones: claims rated in zone B, C or X, of the claims that carry a zone.
| Year | Claims |
|---|---|
| 2025 | 4 |
| 2023 | 1 |
| 2022 | 4 |
| 2020 | 26 |
| 2019 | 4 |
| 2015 | 2 |
| 2010 | 5 |
| 2009 | 34 |
| 2008 | 1 |
| 2007 | 2 |
| 2006 | 9 |
| 2003 | 1 |
| Month | Claims |
|---|---|
| January | 80 |
| February | 65 |
| March | 1 |
| April | 2 |
| July | 2 |
| August | 1 |
| October | 1 |
| November | 65 |
| December | 26 |
| Date | Type | Distance |
|---|---|---|
| Jan 6, 2022 | Heavy Rain | 6.3 mi |
| ZIP (ZCTA) | Share of Issaquah's land | Share of the ZIP inside the city |
|---|---|---|
| 98027 | 67% | 14% |
| 98029 | 33% | 39% |
Issaquah water damage questions
Do I need flood insurance in Issaquah?
Homeowners policies exclude outside floodwater[9], and Issaquah-area ZIPs have 39 NFIP claims in just the last ten years[1].
Which Issaquah ZIP codes do these crews cover?
98027 and 98029[7], in King County. Nearby pages: Sammamish (3.5 mi), Bellevue (6.2 mi), and Renton (8.2 mi)[4].
Which Issaquah ZIP code has the most flood claims?
98027, with 240 NFIP claims and $5,817,107 paid[1].
When was the last flood report near Issaquah?
Jan 6, 2022: a heavy rain report 6.3 miles from the city center[5].
My Issaquah home is fairly new — could the plumbing fixtures and water heater still be under warranty?
Possibly: 25% of Issaquah's housing units were built in 2010 or later[2], the 2nd-highest share of the 15 Seattle-area suburbs we cover. Check your closing paperwork for warranties before paying for a repair.
Sources
- OpenFEMA NFIP claims
- Census ACS 2020–2024 5-year (keyless bulk)
- Census population estimates, Vintage 2025
- Census Gazetteer 2025
- NOAA Storm Events Database
- OpenFEMA disaster declarations
- Census 2020 ZCTA–place file
- FEMA, Flood Zones (link unverified)
- FEMA FloodSmart (link unverified)
Data pulled Sep 28, 2026. Full citations and method.