Zip lookup · WA

99115
Coulee City, Washington.

Coulee City, Grant County, WA · Moses Lake, WA metro · population 1,369

What it costs per month · 99115 $1,541/mo

to buy the typical home at today's mortgage rate — +$863 (+127%) since Jan 2020.

What the home itself did
1 year
Down $2,307 -1%
$295,897$293,590 since Sep 2025
5 years
Up $49,062 +20%
$244,528$293,590 since Sep 2021

Monthly payment to buy the typical home

Home value × that month's 30-year mortgage rate, 20% down, principal and interest. This is the line households feel: prices and rates compound each other.

$500 $1,000 $1,500 $2,000 2002 2006 2010 2014 2018 2022 2026 99115 $1,541 United States $1,922
$500 $1,000 $1,500 $2,000 2002 2010 2018 2026
  • 99115$1,541
  • United States$1,922

At the last five years' pace, a typical home here doubles in price every 19 years.

Typical home values in zip 99115 fell 0.8% over the past year — slower than the nation's +1.2%.

This zip spans 2 counties: Douglas County, WA 66% · Grant County, WA 34%

Zillow also publishes an index for the city itself: Coulee City, WA — measured over the city limits, which is a different area from this zip.

Typical home value $293,590 as of Sep 2026
-0.8%year on year

Typical home value — 99115

Mid-tier homes, smoothed and seasonally adjusted.

$150,000 $200,000 $250,000 $300,000 $350,000 2018 2020 2022 2024 2026 99115 $293,590 Moses Lake $355,465 United States $366,157
$150,000 $200,000 $250,000 $300,000 $350,000 2018 2022 2026
  • 99115$293,590
  • Moses Lake$355,465
  • United States$366,157

Within 20 miles

Coordinates and population from SimpleMaps US Zips (Basic). Rent and home values from Zillow Research.