The median home price in Washington is $612,000, with a local 30-year mortgage rate of 6.7%. A buyer putting 20% down carries a loan of $489,600, generating a monthly P&I payment of $3,159. Adding property taxes ($286/mo) and homeowners insurance ($255/mo) brings total monthly PITI to $3,700.
Washington's property tax rate of 0.56% is among the lower rates in the country, which improves overall affordability by keeping total PITI closer to the principal and interest payment alone. On the Washington median home, that is $286/month, or $3,427 per year.
District of Columbia levies a state income tax, which affects take-home pay and effective buying power. High-income earners in Washington should factor state tax liability into their overall housing budget — mortgage interest may be deductible on both federal and state returns.