Hawaii pricing

Furnace Replacement Cost Calculator — Hawaii

Estimate what a furnace replacement should cost by output, efficiency and venting work. Every figure below is already adjusted for Hawaii labor and material pricing.

Verified August 2026

Does furnace replacement cost cost more in Hawaii?

+62% versus the national baseline

Shipped materials and a small contractor pool make Hawaii the most expensive state in the country for nearly every project; lava and coastal hazard overlays add review on the Big Island. Permit fees here run about 20% off the national average, and Owner-builder permits allowed with an exemption affidavit

Heating output

Cost per 1,000 BTU installed($)

Efficiency

Venting changes

Old furnace removal

Permit fee($)

Estimated installed cost

$7,577 – $10,763

Furnace and labor: $7,776
Venting work: $0
Removal and permit: $834

Estimates only. Local pricing, site conditions and code requirements change the real number.

What changes the number in Hawaii

Local cost indexAbove the national baseline	1.62x national
Permit fee index	1.20x national
Code basisStatewide code applies	Hawaii State Building Code, based on the IRC with county amendments
Owner-builder posture	Owner-builder permits allowed with an exemption affidavit
Largest markets	Honolulu, Hilo, Kahului

The formula

Cost = base unit cost x efficiency multiplier + venting + removal + permit

High-efficiency condensing furnaces (90%+ AFUE) need new PVC venting and a condensate drain, which is why the jump from 80% to 96% AFUE costs more than the equipment difference alone.

Frequently asked questions

How much is a new furnace installed?

Most homeowners pay $4,000 to $8,500 for a replacement gas furnace in 2026. Electric furnaces are cheaper to install but cost far more to run.

How long does a furnace last?

15 to 20 years for a gas furnace with annual service. Past year 15, repairs over about $1,500 usually favor replacement.

Sources

Sources & verification

Hawaii State Building Code Council

Last verified August 2026. Cost figures are modeled estimates based on national baselines adjusted for local labor and material pricing — they are not quotes. Permit rules change; confirm with the building department before starting work.