Hawaii’s new building code could cost you tens of thousands if your contractor is still quoting the old version. Here’s what changed — and what to ask before you sign a build contract on Oahu, Maui, Kauai, or Big Island.

In 2020–2023, all four Hawaii counties officially adopted the 2018 IECC (International Energy Conservation Code) — with their own Hawaii-specific amendments. If you’re building a custom home, doing a major remodel, or buying a teardown lot anywhere from Kailua to Kihei to Princeville to Kona, this code now controls your roof, your insulation, your windows, your water heater, and your power system.

In this video I break down:

• Why Honolulu, Maui, Kauai, and Hawaii County adopted slightly different versions
• What the “Tropical Zone” designation means — and when it actually saves you money
• The Hawaii Amendments “point system” and how builders use it
• Why “Cool Roof” isn’t a marketing term — it’s now code
• The leeward-Haleakala question almost no contractor explains correctly
• The simple questions to ask your contractor BEFORE you sign

If your builder is still quoting you specs from the 2006 or 2015 IECC, you have a problem. Plans get rejected. Permits get pulled. Budgets blow up.

⏱ CHAPTERS
0:00 The hook
0:15 What is the 2018 IECC
0:35 Why all 4 Hawaii counties adopted it
1:05 Hawaii Amendments + the point system
1:25 The “Tropical Zone” designation explained
1:50 Haleakala, leeward sides, and elevation
2:10 Cool Roof + insulation rules
2:35 What to ask your contractor

Looking to buy land, a teardown, or a finished home in Hawaii?
Personal: https://jasonwong.us
Firm: https://islanddragonfly.com

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