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King County Conventional Mortgage Calculator

Adjust the sliders to model your loan in real time. We have prefilled this page with local benchmark averages for King County, Washington based on real HMDA transaction records.

Loan Details

King County, WA Benchmarks

Conventional averages
Typical Property Value$1,196,551
Average Down Payment30.1%
Average Interest Rate6.636%
Effective Tax Rate0.76%
Median Tax Paid$7,114/yr
Tax Growth (Historical)+1.7%
Based on 44,914 regional loans totaling $26,129,410,000 (HMDA database).
$
%

$360,162 down · $836,389 financed

%
yrs
$

Paid directly to principal

Payoff estimated June 2056

Local & Recurring Costs

%

$758 / month

$

Annual premium

$

Per month

%

Not required at 20%+ down

Estimated Monthly Payment

$6,272/mo

  • Principal & Interest$5,364
  • Property Tax$758
  • Home Insurance$150
Amortization · Remaining Balance

Loan Amount

$836,389

Total Interest

$1,094,575

Total of Payments

$1,930,964

Local Market Insights

King County Conventional Mortgage Overview

In King County, the 30.07% average down payment on a Conventional loan is notably high, indicating strong buyer credit and equity. This level allows most borrowers to avoid Private Mortgage Insurance (PMI) entirely, as the median Loan-to-Value (LTV) of 69.93% is well below the 80% threshold. For those using a Conventional loan with taxes in King County, WA, the effective property tax rate of 0.76% adds roughly $758 monthly on a $1.2M home. With a 1.7% inflation-adjusted tax increase, true affordability hinges on this fixed cost. All data reflects 100% owner-occupied purchases, not investment properties, underscoring a robust local market for primary residences.

Disclaimer: This calculator provides estimates for educational purposes only and does not constitute a loan offer or financial advice. Actual rates, taxes, insurance, and fees will vary.