How much does radon mitigation cost in Honolulu, HI?

Most Honolulu homeowners spend between $1,300 – $3,650 on radon mitigation, with an average around $2,500. Local labor prices 46% above the national average, so Honolulu quotes tend to land at the higher end of national ranges.

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

Licensed trade labor in Honolulu runs about 146% of the national average, and the best crews book out fastest in spring and early summer. Hawaii weather drives material choices here, so ask contractors what they install most often in Honolulu and why.

Do I need a permit for radon mitigation in Honolulu, Hawaii?

Most Honolulu, HI 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 Honolulu?

Get at least three written quotes from licensed, insured Hawaii contractors. Comparing line items — not just the bottom line — is the fastest way to spot an inflated bid in the Honolulu 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/Honolulu, HI

Honolulu metro · Hawaii

Radon Mitigation cost in Honolulu, HI

Honolulu homeowners typically pay $1,300 – $3,650 for radon mitigation. Local labor and materials price 46% above the national average.

Get my Honolulu estimate Use the Honolulu calculator

Honolulu average

$2,500

Typical low

$1,300

Typical high

$3,650

Per system

$1,300 – $3,650

Sample ZIP

What drives Honolulu pricing

Local labor

Licensed trade labor in Honolulu runs about 146% of the national average, and the best crews book out fastest in spring and early summer.

Permits & code

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

Climate & conditions

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

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

$1,473 – $1,995

Most homeowners pay around $1,734

Compare quality / material level

Cost by material in Honolulu

Installed Honolulu pricing per system.

Option	Installed cost	Pros	Cons
Single-point sub-slab system	$1,550 – $2,100	—	—
Sub-slab with sealing	$2,100 – $2,800	—	—
Crawlspace membrane system	$2,800 – $3,600	—	—
Multi-point system with monitoring	$3,600 – $4,950	—	—

Where the money goes in Honolulu

A typical $2,500 Honolulu project, broken down by line item.

Labor0.45% · $11
Materials0.38% · $10
Permits & inspections0.05% · $1
Overhead & profit0.12% · $3

Common add-ons

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

Post-mitigation testing

$220 – $440

Crawlspace vapor barrier

$2,200 – $7,300

Sump pit sealing

$290 – $1,150

Continuous radon monitor

$220 – $585

Ways to save in Honolulu

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.

Honolulu FAQs

Get a Honolulu price you can budget against

Answer a few questions about your project and we'll model a low, average and premium price for your HI ZIP code — then connect you with vetted local pros.

Get free quotes from certified pros

More Honolulu research

Best radon mitigation companies in Honolulu Radon Mitigation permits in Hawaii Radon Mitigation near me All Hawaii prices

More Hawaii cities

Hilo Kailua Kahului

Other project costs in Honolulu

Fence Installation in Honolulu

$2,190 – $5,840

Roof Replacement in Honolulu

$12,410 – $49,640

Kitchen Remodel in Honolulu

$26,280 – $138,700

HVAC Replacement in Honolulu

$8,030 – $26,280

Deck Building in Honolulu

$6,424 – $17,520

Window Replacement in Honolulu

$657 – $2,190

See every Honolulu cost guide