How much does radon mitigation cost in Modesto, CA?

Most Modesto homeowners spend between $900 – $2,500 on radon mitigation, with an average around $1,700. Local labor prices right at the national average, so Modesto quotes tend to land at the higher end of national ranges.

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

Modesto labor rates sit close to the national average. Valley heat drives cooling loads in summer.

Do I need a permit for radon mitigation in Modesto, California?

City permits apply to structural, roofing and fence work. 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 Modesto?

Get at least three written quotes from licensed, insured California contractors. Comparing line items — not just the bottom line — is the fastest way to spot an inflated bid in the Central Valley 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/Modesto, CA

Central Valley · California

Radon Mitigation cost in Modesto, CA

Modesto homeowners typically pay $900 – $2,500 for radon mitigation. Local labor and materials price right at the national average.

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Modesto average

$1,700

Typical low

$900

Typical high

$2,500

Per system

$900 – $2,500

Sample ZIP

95350

What drives Modesto pricing

Local labor

Modesto labor rates sit close to the national average.

Permits & code

City permits apply to structural, roofing and fence work.

Climate & conditions

Valley heat drives cooling loads in summer.

Instant cost calculator

Adjust the inputs to see live pricing

Number of suction points1 system

Quality / material level

Site access

Removal / prep work

Timing

Estimated project cost

$998 – $1,378

Most homeowners pay around $1,188

Compare quality / material level

Cost by material in Modesto

Installed Modesto pricing per system.

Option	Installed cost	Pros	Cons
Single-point sub-slab system	$1,050 – $1,450	—	—
Sub-slab with sealing	$1,450 – $1,900	—	—
Crawlspace membrane system	$1,900 – $2,450	—	—
Multi-point system with monitoring	$2,450 – $3,400	—	—

Where the money goes in Modesto

A typical $1,700 Modesto project, broken down by line item.

Labor0.45% · $8
Materials0.38% · $6
Permits & inspections0.05% · $1
Overhead & profit0.12% · $2

Common add-ons

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

Post-mitigation testing

$150 – $300

Crawlspace vapor barrier

$1,500 – $5,000

Sump pit sealing

$200 – $800

Continuous radon monitor

$150 – $400

Ways to save in Modesto

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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Radon Mitigation cost near Modesto

Radon Mitigation cost in Fresno, CA

$882 – $2,450

Radon Mitigation cost in Bakersfield, CA

$873 – $2,425

Radon Mitigation cost in Stockton, CA

$918 – $2,550

More California cities

Los Angeles San Diego San Jose San Francisco Oakland Sacramento Long Beach Anaheim

Other project costs in Modesto

Fence Installation in Modesto

$1,500 – $4,000

Roof Replacement in Modesto

$8,500 – $34,000

Kitchen Remodel in Modesto

$18,000 – $95,000

HVAC Replacement in Modesto

$5,500 – $18,000

Deck Building in Modesto

$4,400 – $12,000

Window Replacement in Modesto

$450 – $1,500

See every Modesto cost guide