Adu construction — Urban Honolulu, HI

Last updated: September 24, 2026

What affects the price

Building an ADU involves several moving parts that shape your total budget. The biggest factor is whether you choose a prefabricated unit or a custom build on-site. Site preparation is also significant; if your land requires extensive grading, utility trenching, or foundation work, costs will climb. Your choice of finishes—like kitchen cabinetry, flooring, and siding materials—also shifts the bottom line. We help you navigate these variables to find a setup that fits your property. Exact pricing confirmed free on the call.

About this service

This is the physical process of building your unit, including foundation work, framing, and utility hookups. You need this when you have your designs finalized and permits approved. Construction costs are influenced by the choice of materials, your local labor rates, and the accessibility of your property. We ensure the work is done to code and completed as efficiently as possible. Exact pricing confirmed free on the call.

Frequently asked in Urban Honolulu

Also serving nearby: San Francisco · Daly City · San Mateo · Salinas · Santa Maria

All cities in Hawaii →

More on this: HUD ADU resources — ADU policy and financing research.

Service area details

Serving all of Urban Honolulu — population 341,778; about 5,637 residents per square mile across 60.6 sq mi.

Neighborhoods served in Urban Honolulu: Waikiki, Kaimuki, Kapahulu, Manoa, Palolo Valley — and every surrounding area.