The King County Price Index.
Most contractors quote from memory and hope the number holds. We quote from a live, 750,000+ data-point King County pricing engine, anchored to real completed jobs — the same engine every Prolific estimate and proposal is built from.
Your project gets matched against real data
Every price Prolific quotes starts with The King County Price Index — a live King County pricing engine built from real completed jobs, trade-specific cost data, and continuously refreshed market benchmarks. Not a national average. Not a guess. Your project type, scope, and location get matched against what things actually cost, here, right now.
You get a range in 90 seconds, no salesperson
The instant estimate tool at /estimate returns a real price range straight from the index — before you talk to anyone. If you want it tightened further, the 5-minute survey at /survey feeds your specifics back into the same engine and returns a full 3-tier proposal, typically within 24 hours.
The walkthrough locks the number — it never moves the wrong direction
The index gives you an honest starting range. A real walkthrough, on your property, is what locks the final price. That price is what you sign. No change-order theater, no bait-and-switch from the number that got you in the door.
Don't take our word for it — watch the engine.
The stats below are pulled live from the same database that prices your project. Nothing on this page is hardcoded.
Want the full technical deep dive — live agent activity, doctrine, and bid intelligence? See the system, live →
See your number.
90 seconds for a free instant range, or 5 minutes for a full 3-tier proposal.