Custom Tiny Homes in Hawaii

Yes, if it sits on a permanent foundation and is permitted as a home. Depending on your lot, that can be an accessory dwelling unit (ADU), an ʻohana unit or a small main house. Each county decides what your lot allows, based on zoning, lot size, water and wastewater. A tiny house on wheels is different: to live in one full time, plan on setting it on a foundation and permitting it like any other home. Every home is subject to county permit and Department of Health wastewater approval.

Less than a full-size house, but more than most prices you see online, because those usually cover the home alone. In Hawaiʻi the finished cost also includes shipping to your island, the foundation, a septic or sewer connection, licensed electrical and plumbing, permit fees, general excise tax and site work. Your lot moves those numbers more than the model does. That’s why we give you one written price for the finished home on your lot, after the free lot check.

They overlap, which is why so many people mix them up. An ADU (accessory dwelling unit) is a second, self-contained home on a lot that already has one. An ʻohana unit is a second home meant for family. On Oʻahu, an ʻohana unit has to be lived in by relatives of the family in the main house, while an ADU there can be rented long term. “Tiny home” describes size, not a type of permit: Kauaʻi’s county code, for example, treats a home of 500 square feet or less, not counting lofts, as a tiny house. Which one fits depends on your county and your lot.

Often, yes. A 2024 state law, Act 39, requires every county to allow at least two ADUs, or the reasonable equivalent, on residentially zoned lots by December 31, 2026. Honolulu already allows one ADU plus one ʻohana unit alongside a single-family home. What fits on your lot depends on its zoning and size, water and wastewater, and any HOA rules or covenants. Agricultural land has its own, tighter rules. The free lot check tells you which apply to yours.

Plenty of people do, and plenty regret it. An unpermitted home is like a car with no title. You can live in it, but a lender generally won’t finance it, it’s harder to sell for what it’s worth, and the county can fine you or order it changed or torn down. It can also leave your children a problem instead of a home. A permit costs more up front. It usually costs far less than fixing an unpermitted home later.

You talk to someone on our team about your lot: which island, roughly where, who the home is for and what you want to spend. We tell you what you can likely build and what the next step would be. A site visit, a written price and a timeline come after that, and only if you want them. In Hawaiʻi the permit often takes longer than the build, so we’ll be honest about time too. There’s no charge and no pressure, and you’ll get a straight answer even if you never build with us.