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

Baseline

Rates

Taxes & Ins.

DTI

US County (Smart Autofill)

Loan Type

Credit Score (FICO)

Your credit score determines your risk profile. A higher score lowers your interest rate and conventional PMI costs.

Representative Score: 780 (Excellent (Prime))

King County, WA Benchmarks

Conventional averages

Typical Property Value$1,196,551

Average Down Payment30.1%

Average Interest Rate6.636%

Effective Tax Rate0.76%

Home Price

Down Payment

$360,162 down · $836,389 financed

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.