What It Really Costs to Own a Home in King County Right Now

“What’s the payment going to be?” is usually the first real question a buyer asks once they’ve found a home they like — and it’s often answered incompletely. The mortgage payment is the headline number, but it’s not the whole cost of owning a home in King County right now. Let’s break down what a monthly payment actually looks like at today’s numbers.

Starting with the median

Depending on home type, the current King County median runs somewhere between roughly $858,000 and $975,000. That’s a wide range on its own, which is part of why “the median home price” is such a slippery number to plan around — a townhome, a single-family home, and a condo can all land in very different places within it.

What the real monthly number looks like

Take a buyer putting 10% down at prevailing rates on a home near that median. The true monthly cost isn’t just principal and interest — it’s the full picture:

Mortgage payment (principal + interest on the loan balance after your down payment)
Property tax — roughly 1% of the home’s value annually in most of King County, which breaks down monthly
Homeowners insurance — varies by home and coverage, but it’s a real line item, not an afterthought

Put those three together on a median-priced Seattle-area home, and you’re looking at a true monthly cost landing somewhere around $5,600–$6,600, depending on exactly where in that price range the home falls and what rate you lock in.

The mortgage payment alone almost never tells the full story. Taxes and insurance aren’t optional extras — they’re baked into what “owning this home” actually costs every month.

Why this matters before you start touring homes

I’d rather walk a buyer through these numbers honestly before they fall in love with a house than have them find out the real monthly cost during underwriting. It’s not about scaring anyone off — it’s about making sure the number you’re picturing and the number on your first mortgage statement are the same number.

If you’re weighing what’s realistic in today’s King County market — whether that’s Renton, Federal Way, or elsewhere in South King County — I’m glad to run the actual math against your specific price range and down payment. It takes fifteen minutes and it’ll save you a lot of guesswork. Reach out whenever you’re ready to talk numbers.