How much does basement waterproofing cost in Renton, WA?
| Typical total$96 per linear feet | $14,378 |
|---|---|
| Range you should see in bidsthree bids on the same scope normally land inside this | $9,586 – $21,088 |
| Labor portion60% of the job — this is the part that moves by city | $8,627 |
| Material portion40% — bought at national prices | $5,751 |
| Cement Masons and Concrete Finishers pay near Rentonabout $42/hr · Seattle-Tacoma-Bellevue, WA metro | $87,880/yr |
| U.S. mean for the same tradeSOC 47-2051 | $60,050/yr |
| Versus the national pricetrade pay here runs +46.3% against the U.S. mean | +$3,128 |
Notes
- Where the number comes from. The national price for interior basement waterproofing is $75 per linear feet — interior drain tile pricing published for 2026, $50–$110 per linear foot. Labor is about 60% of that. Cement Masons and Concrete Finishers near Renton, WA average $87,880 a year against a U.S. mean of $60,050 — a factor of 1.463 — so the labor half is scaled by that and the material half is not. Source: BLS OEWS May 2025 for the Seattle-Tacoma-Bellevue, WA metro area, SOC 47-2051.
- Why the city matters, not just the state. Trade pay moves inside a state as much as it does between states. Crews do not commute across a state to bid a job, and materials ship at national prices either way — so a metro wage is the honest input here and a state average quietly rounds four different cities into one number.
- What is in the price: breaking out the slab at the perimeter, the drain tile and gravel, a wall vapour barrier, re-pouring the concrete, a sump pit and pump.
- What is not: a battery backup pump, exterior grading and downspout work, foundation crack injection, and finishing the basement afterwards. These are the lines that turn a $14,378 quote into a $17,973 invoice, so ask about each one before signing.
- Use this as a bid check, not a quote. It prices an average job in average condition. Difficult access, the state of what is being replaced, the season, and a crew booked out three months all move the real number, and none of them are in a per-unit average.
interior basement waterproofing in Renton, WA
$14,378 is the typical number, and three bids on the same scope normally land between $9,586 and $21,088.
That is $3,128 more than the same job priced at the national average.
Why the city changes the number
About 60% of this job is labor — $8,627 of the $14,378 above. Labor is the only part that moves locally; a bundle of material costs what it costs wherever it is nailed down.
Cement Masons and Concrete Finishers near Renton average $87,880 a year, against a U.S. mean of $60,050. That is a factor of 1.463, so the labor half is scaled by it and the material half is not.
Source: BLS OEWS May 2025 for the Seattle-Tacoma-Bellevue, WA metro area, SOC 47-2051.
What the quote should include
The lines that turn a quote into an invoice
Ask about each of them before you sign. On a job this size they are the difference between $14,378 and something a quarter higher.
Use it as a bid check, not a quote
This prices an average job in average condition. Access, the state of what is being replaced, the season, and a crew booked out three months all move the real number, and none of them are in a national average.
If a bid lands outside $9,586 – $21,088, that is not automatically wrong — but it is the question worth asking out loud.
Nearby sizes
Read more
- Epoxy or Polyurethane Crack Injection? — Structural vs WatertightOne restores strength, the other stops water. Choosing on price means choosing the wrong one about half the time.
- Exterior or Interior Basement Waterproofing? — What Each One Actually DoesOnly one of them keeps the wall dry. Whether that is worth two to three times the money depends on what you plan to do with the basement.
- Where Is the Basement Water Coming From? — Four Sources, Four FixesBuy the diagnosis before the solution. Waterproofing companies diagnose the problem they sell, and one of the four causes costs nothing to fix.