Washington Mortgage Guide 2026

Buying a Home in Washington State

Washington is an expensive market by national standards, but it comes with one structural advantage that often gets overlooked: no state income tax. Every dollar you earn stays whole until federal tax day, which translates directly into borrowing capacity. A household earning $120,000 in Washington clears roughly $8,000–$10,000 more per year in take-home pay than a comparable earner in California or Oregon, depending on marginal rates. That gap matters when a lender is scrutinizing your debt-to-income ratio.

The flip side is that Washington's sales tax — ranging from 8.5% to over 10.6% depending on the county — funds the services that income tax would otherwise cover. And while property taxes are relatively moderate by coastal standards, the state's Real Estate Excise Tax (REET) adds meaningful transaction costs at closing, especially in the Seattle metro where median prices routinely exceed $800,000.

Statewide, the median home value runs around $611,000–$613,000 as of mid-2026, per Zillow and Redfin data. Seattle proper skews significantly higher — median sale prices in the city have hovered near $875,000–$879,000 in recent months. Buyers in Spokane, Yakima, or the Tri-Cities will find a very different market, with medians often in the $300,000–$450,000 range.

Washington Property Taxes

Washington's average effective property tax rate on owner-occupied homes is approximately 0.75%, according to the Tax Foundation (updated March 2026). That places the state below the national average of roughly 1.1% and well below high-tax states like New Jersey (2.49%) or Illinois (2.08%). County-level rates do vary — San Juan County comes in around 0.53%, while Garfield County reaches about 0.96%. King County, where most of the Seattle market sits, typically runs near 0.80%–0.90% depending on the specific jurisdiction.

Washington property taxes are assessed by county and collected annually or semi-annually. On a purchase, your lender will almost certainly require an escrow account to collect property taxes monthly. For a $600,000 home at the statewide average effective rate, that works out to roughly $4,500 per year, or $375 per month added to your mortgage payment.

All figures are estimates based on Tax Foundation effective rate data and should be verified with the county assessor for any specific property. Source: Tax Foundation, Washington State Profile.

Closing Costs & Real Estate Excise Tax in Washington

Washington buyers typically pay closing costs totaling 2%–5% of the purchase price. On a $600,000 home, that's roughly $12,000–$30,000 — and the state average lands around 2.4%, or approximately $14,000, according to closing cost data compiled by Sammamish Mortgage. The main buyer-side items include the loan origination fee, escrow setup, appraisal (usually $500–$900), title insurance, and prepaid items like the first year's homeowners insurance and two months of property taxes.

Washington's most distinctive transaction cost is the Real Estate Excise Tax (REET). This is primarily a seller's tax, but buyers need to understand it because it affects net proceeds, negotiating leverage, and in rare cases (seller non-payment) can create a lien on the property. The state portion uses a graduated structure that became effective January 1, 2023:

Source: Washington Dept. of Revenue, REET page. Local REET of up to 0.50% is added on top of the state rate; total REET for most transactions runs 1.60%–3.50%.

The graduated structure is applied in tiers — it's not a flat rate on the total sale price. On a $700,000 home, the seller pays 1.10% on the first $525,000 ($5,775) and 1.28% on the remaining $175,000 ($2,240), for a state REET total of $8,015. Add a local REET of 0.25%–0.50% and total excise tax lands near $9,800–$11,500 on that transaction. Agricultural land and timberland are exempt from the graduated structure and remain taxed at a flat 1.28%.

First-Time Buyer & Down Payment Assistance Programs

The Washington State Housing Finance Commission (WSHFC) operates the state's primary homebuyer assistance programs. These are real, funded programs — not generic grants that appear and disappear. Income and purchase price limits apply and change periodically, so always verify current terms at wshfc.org.

Home Advantage

The flagship WSHFC program pairs a 30-year fixed-rate mortgage at a below-market rate with optional down payment assistance. Income limits reach up to $180,000 in King County — well above the threshold many state programs set, which makes it accessible to moderate-income buyers in expensive markets. First-time buyer status is required for most loan types paired with this program, though it's defined as not having owned a primary residence in the past three years.

Home Advantage Down Payment Assistance (DPA)

Attached to the Home Advantage first mortgage, this DPA provides up to 5% of the loan amount as a deferred second mortgage at 0% or 1% simple interest. Repayment is due when you sell, refinance, or pay off the first mortgage — not monthly. For a $490,000 loan, that's up to $24,500 toward your down payment or closing costs.

House Key Opportunity

Aimed at buyers earning at or below 80% of area median income, House Key Opportunity offers a subsidized first mortgage rate and can be paired with the Opportunity DPA. Income limits vary by county and household size but generally run $100,000–$175,000.

Opportunity DPA

Paired with the House Key Opportunity mortgage, this program provides up to $10,000 at 1% simple interest, deferred. It's designed for buyers who need more help than the standard Home Advantage DPA provides but are within the income band for House Key.

Veterans DPA

WSHFC's dedicated program for active duty military, veterans, and surviving spouses. Up to $10,000 in down payment assistance is available under favorable terms. This stacks with VA loan benefits for eligible borrowers, potentially allowing a purchase with minimal out-of-pocket cash at closing.

Covenant Homeownership Program

A newer WSHFC initiative targeting buyers from communities historically impacted by discriminatory housing covenants. This program provides a 0% interest, deferred second mortgage — no monthly payment, with repayment triggered at sale, refinance, transfer, or at 30 years. Eligibility criteria include income limits and geographic requirements tied to affected census tracts.

Sample Monthly Payment Estimate

The table below illustrates estimated total monthly payments for three purchase scenarios in Washington. These are estimates only — actual payments depend on your credit score, down payment, lender, exact tax assessment, and insurance quote. Interest rate used is illustrative.

*Rate is illustrative only. PMI estimated at 0.80% annually on loan amount; drops off once equity reaches 20%. All figures are estimates for planning purposes.