How much does radon mitigation cost in Olympia, WA?

Most Olympia homeowners spend between $1,050 – $2,900 on radon mitigation, with an average around $1,950. Local labor prices 16% above the national average, so Olympia quotes tend to land at the higher end of national ranges.

Why is radon mitigation more or less expensive in Olympia than elsewhere?

Licensed trade labor in Olympia runs about 116% of the national average, and the best crews book out fastest in spring and early summer. Washington weather drives material choices here, so ask contractors what they install most often in Olympia and why.

Do I need a permit for radon mitigation in Olympia, Washington?

Most Olympia, WA projects that change structure, electrical, plumbing or mechanical systems need a permit from the local building department; cosmetic work usually does not. Always confirm current requirements with the local building department before signing a contract, and make sure the permit is pulled by your licensed contractor.

How many quotes should I get in Olympia?

Get at least three written quotes from licensed, insured Washington contractors. Comparing line items — not just the bottom line — is the fastest way to spot an inflated bid in the Olympia metro market.

How much does radon mitigation cost in 2026?

Most homeowners pay between $900 and $2,500, with a national average near $1,700. Small, simple jobs land at the low end; large or premium-material jobs run well above the high end.

What is the cost per system?

Installed pricing usually runs $900.00 to $2,500.00 per system, including labor and materials. Expensive metros can run 15–45% higher than that range.

What drives the price up the most?

Scope and access. Larger quantities lower your per-system price, but difficult access, demolition of existing work, structural repairs found mid-job, premium materials and rush scheduling each add 8–30%.

Permits are typically required when the work changes structure or ties into electrical, plumbing, gas or mechanical systems. Budget $75–$600 in most cities and confirm whether your contractor pulls it — unpermitted work can block a future home sale.

How long does the job take?

Most residential projects of this type finish in one to five working days once materials are on site. Custom orders, inspections and weather are the usual causes of delay.

How many quotes should I get?

Three. Bids on the same scope commonly vary 20–40%, and the middle bid with the strongest warranty and references is usually the best value — the cheapest bid often excludes prep, disposal or permits.

Home/Cost guides/Radon Mitigation/Olympia, WA

Olympia metro · Washington

Radon Mitigation cost in Olympia, WA

Olympia homeowners typically pay $1,050 – $2,900 for radon mitigation. Local labor and materials price 16% above the national average.

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Olympia average

$1,950

Typical low

$1,050

Typical high

$2,900

Per system

$1,050 – $2,900

Sample ZIP

What drives Olympia pricing

Local labor

Licensed trade labor in Olympia runs about 116% of the national average, and the best crews book out fastest in spring and early summer.

Permits & code

Most Olympia, WA projects that change structure, electrical, plumbing or mechanical systems need a permit from the local building department; cosmetic work usually does not.

Climate & conditions

Washington weather drives material choices here, so ask contractors what they install most often in Olympia and why.

Instant cost calculator

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Number of suction points1 system

Quality / material level

Site access

Removal / prep work

Timing

Estimated project cost

$1,140 – $1,615

Most homeowners pay around $1,378

Compare quality / material level

Cost by material in Olympia

Installed Olympia pricing per system.

Option	Installed cost	Pros	Cons
Single-point sub-slab system	$1,200 – $1,700	—	—
Sub-slab with sealing	$1,700 – $2,200	—	—
Crawlspace membrane system	$2,200 – $2,850	—	—
Multi-point system with monitoring	$2,850 – $3,950	—	—

Where the money goes in Olympia

A typical $1,950 Olympia project, broken down by line item.

Labor0.45% · $9
Materials0.38% · $7
Permits & inspections0.05% · $1
Overhead & profit0.12% · $2

Common add-ons

Extras that show up on Olympia quotes but rarely in the headline price.

Post-mitigation testing

$175 – $350

Crawlspace vapor barrier

$1,750 – $5,800

Sump pit sealing

$230 – $930

Continuous radon monitor

$175 – $465

Ways to save in Olympia

Test first with a $20 kit before commissioning a system.
Route the pipe on the least visible elevation to skip cosmetic upgrades.
Collect three written bids on an identical scope — spreads of 20–40% are normal.
Book in the off-season and stay flexible on the start date to save 5–15%.
Bundle nearby work into one mobilization so you only pay setup and travel once.
Ask what the contractor would change to cut 10% without hurting durability.

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