Seattle · King County
Trim Repair Cost Calculator in Seattle
Nobody can price dry rot from a photograph, and any tool that hands you one confident number is guessing at your expense. This one gives you a range — the band a repair like yours normally lands in around Seattle, built from what this work actually costs here rather than a national average.
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Cost Calculator
Four questions, an honest range. Built from what these repairs actually run around Seattle — not a national average.
Measure the runs you want replaced. A single window casing is roughly 14–18 ft.
Ranges are ground-level work in cedar unless you change the inputs. Material choice moves the figure by roughly 20% either way, and every range includes the mobilisation minimum — the fixed cost of getting a crew, a truck and materials to your house for the day.
Turn the range into a real number
Send the numbers you just ran and Seattle Trim Repair will come look at the actual wall. The inspection is free, the estimate is free, and you get a fixed price for the work we can see plus a clear rate for anything we find behind the trim — agreed with you before we cut.
$200 off any siding or trim repair over $2,500
Mention this page when you call or request your estimate.
- What happens next
- We call you back during business hours, book a walk-through — usually the same week — and put a written scope in your hands.
- Prefer the phone
- Call (425) 517-1751. Mon–Fri, 7:00am – 5:00pm.
Get a formal estimate
Tell us what is going on with your trim, siding, or rot and we will get you a free estimate — most jobs are scheduled the same week.
What actually drives trim and dry rot repair cost here
Six things move the number, and only one of them is the price of a board. Understanding them is the difference between reading a quote and being surprised by one.
- 1
How far the rot actually went
This is the whole ballgame. Rotten trim is a symptom — the question is whether the sheathing, the building wrap and the framing behind it are still sound. A soft window casing can be a two-hour swap or the visible corner of a wall that needs opening up, and nothing short of pulling the board tells you which.
- 2
Height and access
A ground-floor casing is a ladder and a helper. The same board on a gable end above a roof pitch means staging, fall protection and two people working at height all day. Expect upper-level work to run roughly 30–45% above the identical repair you can reach from the driveway.
- 3
Material and profile
Western Red Cedar, James Hardie fiber cement and LP SmartSide all cut, fasten and finish differently, and PVC and composite carry a stock premium. Matching an existing profile matters more than the price per board — a repair that reads as a patch from the sidewalk is a repair you pay for twice.
- 4
The detail that let water in
Most rot we open up in Seattle traces back to one detail: a head flashing that was never installed, a kickout missing where a roof meets a wall, end grain that went up unprimed, or a caulk joint doing a job flashing should have done. Replacing the board without correcting the detail just buys a few winters.
- 5
Finish level
Paint-ready is one price. Primed on all six sides before it goes up, then finish-coated to match the rest of the elevation, is another. In this climate the priming is not optional — unsealed end grain is where the next repair starts.
- 6
Season, and what the house is made of
From October through April work gets tarped and scheduled around the weather, which stretches a job. On homes built before 1978, disturbing painted trim brings EPA lead-safe work practices into scope, and the containment and cleanup that go with them add hours.
Typical Seattle market ranges
Installed rates for ground-level work in cedar, materials and labour together. These are the same figures the calculator above is built on.
| Repair scope | Per linear foot | Typical 24 ft job |
|---|---|---|
| Trim repair Casing, fascia, corner boards, water table — framing behind it is sound. | $24 – $38 | $1,200 – $1,850 |
| Dry rot repair — minor Rot stops at the trim. Nothing soft behind it once the board is off. | $40 – $62 | $1,750 – $2,650 |
| Dry rot repair — moderate Into the sheathing. New flashing and building wrap go back with it. | $72 – $112 | $2,750 – $4,250 |
| Dry rot repair — extensive Framing is compromised. Studs, sills or headers get replaced. | $135 – $210 | $4,900 – $7,550 |
Upper-level work adds roughly 30–45%. Fiber cement and composite sit above cedar, pine and engineered wood below it. The job column includes the mobilisation minimum, which is why a 6 ft repair does not cost a quarter of a 24 ft one.
What changes a quote once we look
The calculator prices what you can see. Here is the short list of what we find behind the trim that moves a number, in rough order of how often it happens.
- Sheathing that is soft to a screwdriver once the trim is off — the most common reason a quote lands above the calculator.
- Rot that has tracked down into a rim joist, sill plate or stud, which moves the job from carpentry to structural work.
- Head flashing that is missing, reversed or buried under caulk at a window, door or roof-to-wall junction.
- A window or door that has to come out for the repair to be done properly rather than patched around.
- Several small repairs on different elevations — mobilising once for four of them costs far less than four separate visits, so the per-foot number drops.
- Trim that was face-nailed into wet framing, so the fasteners have rusted and the board has to be cut out rather than pulled.
None of that gets added quietly. Anything we uncover is shown to you, priced, and agreed before the saw comes back out.
Jobs in the ranges above
Trim and dry rot work on Seattle homes — what the repair looks like opened up, and what it looks like finished.
More of the same work is in the project gallery, and the dry rot repair and exterior trim repair pages explain how each job is scoped.
Want the range narrowed down in five minutes?
Describe what you are seeing — where the soft spot is, how high up, what the trim is made of — and we will tell you which band of this calculator you are really in before anyone drives out.
Mon–Fri, 7:00am – 5:00pm
Cost calculator questions
How accurate is this trim repair cost calculator?
Why is dry rot repair priced so differently from trim repair?
Do you charge for the estimate or the inspection?
Why does upper-level work cost more than the same repair at ground level?
Get the real number for your house
Free estimate, free 15-point dry rot inspection, and same-week scheduling in Seattle and across King County.
Mon–Fri, 7:00am – 5:00pm · Free estimates · Same-week scheduling