Total monthly cost of ownership
Cost to Own a Home in Issaquah, Washington
A $934,000 home here costs
$6,527per month, all in — with 20% down at today's 6.66% 30-year fixed rate.
A standard mortgage calculator would have told you $4,802. The real number is $1,725 higher every month — 36% more than the payment most buyers budget for.
Where every dollar goes
Only the first line is a mortgage payment. Change any assumption above and every figure below recalculates.
Issaquah against King County and Washington
| Measure | Issaquah | King County |
|---|---|---|
| Median home value | $934,100 | $811,200 |
| Median property tax | $7,266 | $6,785 |
| Effective tax rate | 0.778% | 0.836% |
| Median gross rent | $2,484 | $2,035 |
| Population | 39,472 | 2,262,713 |
The weather behind that power bill
Issaquah sits in King County, which averages a high of 76.7°F in its hottest month and a low of 35.3°F in its coldest, with 63.28" of precipitation a year and 42% of it in a single three-month stretch. That climate drives 151 cooling and 4,991 heating degree days, which is what sets the $134 electricity line above.
See the full climate breakdown for King County — month by month temperatures, rainy season timing, snowfall and heating and cooling costs.
Other cities in King County
Full King County cost breakdown · Every county in Washington
Common questions
How much does it cost to own a home in Issaquah?
A $934,000 home in Issaquah, Washington costs approximately $6,527 per month with 20% down at 6.66%. That is $4,802 principal and interest, $606 property tax, $139 homeowners insurance, $202 utilities and $778 set aside for maintenance.
What is the property tax rate in Issaquah?
Issaquah has an effective property tax rate of 0.778%, based on a median home value of $934,100 and median real estate taxes of $7,266. That is lower than the King County average of 0.836%.
What is the average home price in Issaquah?
The median owner-occupied home value in Issaquah, Washington is $934,100, against $811,200 across King County.
Is it cheaper to rent or buy in Issaquah?
Median gross rent in Issaquah is $2,484 a month, against $6,527 to own the median home all in. Renting costs less month to month here, though renting builds no equity.
Sources & methodology
- Median home value, real estate taxes, gross rent and population for Issaquah — US Census Bureau, American Community Survey ACS 2023 5-Year, place-level tables.
- Homeowners insurance — NAIC average premium for Washington.
- Electricity price — EIA Electric Power Monthly Table 5.6.A.
- Mortgage rate — Freddie Mac PMMS, refreshed weekly.
- Maintenance (1%/yr) and water and sewer ($68/mo) are national estimates. Every assumption above is editable.