King County Condo Market 2026: Why Weak Pro Formas Break
Most condo and townhouse pro formas in King County were built for a market that no longer exists.
Seattle just posted the biggest home-price drop in the country, with inventory surging. But the county-wide headline hides what actually matters for builders.
The market changed. The pro formas didn’t.
Here’s what the NWMLS March data actually shows for King County condos:
→ Active listings: up 40% year-over-year
→ Pending sales: down 19%
→ Median price: up just 2.5%
Read those three together. Supply is surging, demand is pulling back, and price isn’t rising enough to cover the gap.
The segment feeling it first? Attached product — condo and townhouse infill.
Detached is holding better. But infill margins live and die on absorption pace — and absorption just slowed.
This is not a crash. It’s stabilization, not collapse.
So what changed?
Supply finally caught up. Builders kept delivering while buyers turned selective. On a 6-unit infill townhouse project, a two-month slip in absorption can quietly erase the margin the pro forma assumed in a hot market.
For anyone underwriting a project in King County right now — developer, GC, investor — one question matters more than the headlines:
WHICH segment, WHICH submarket, WHICH absorption pace.
Not “is Seattle still growing?” It is.
But growth doesn’t mean every project pencils. Feasibility does.
If you’re evaluating a condo or townhouse infill deal in King County and want a second read on the numbers before you commit — I’m happy to take a look.
#SeattleRealEstate #KingCounty #Feasibility #ConstructionManagement #RealEstateDevelopment
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June 30, 2026 /
Source: NWMLS March 2026 Market Snapshot, King County condo segment. The detached numbers tell a calmer story — which is exactly the point. The county-wide median hides what’s happening segment by segment.