ADU Hawaii

Accessory Dwelling Unit Builders


At H-1 Construction, we are dedicated to bringing stress-free, high-quality Home Accessory Dwelling Units (ADU) Hawaii.

License BC-34618 | BIA Grand Award Winner | BBB A+ rating | 30+ years of experience

Get a free quote for your ADU or Ohana Kit project today!

We are H-1 Construction, Building ADU’s In Hawaii

We are H-1 Construction, one of the few local, family-owned, and operated home builders in Honolulu, Hawaii. We take pride in our work and the relationships we have fostered over the years. With over 30 years of contracting and construction experience in Hawaii, we have worked on projects ranging from custom new homes to extensive renovations and additions and even customized Ohana kit homes and fully custom accessory dwelling units (ADU) in Hawaii. When quality matters, you can count on H-1 Construction.

We believe that every project starts with you, your vision, and your dream.

That’s why we pride ourselves on making the construction process fun and exciting for everyone involved. We handle the permitting and planning with the city, allowing you to enjoy the construction process. Our goal is to create the perfect accessory dwelling unit (ADU) for you and your Ohana.

FAQ – Frequently Asked Questions

adu hawaii

Why Choose Us for Your Accessory Dwelling Unit or Hawaii ADU Project?

Hawaii Home Additions or adding a Hawaii ADU (Accessory Dwelling Unit) is a relatively common upgrade within Honolulu, Hawaii and across the islands. With competitive real estate market and a housing shortage in Hawaii, ADUs have become a popular option among homeowners with growing families.

Whether it is standard home addition or an Ohana house, an accessory dwelling unit adds incredible value to a home by adding extra living space to your property and boosting the overall value of your property. Whether you are building an ADU in Hawaii to support your growing family or are looking to gain additional rental income, we can help you fully design and build the perfect ADU for you.

The Home Addition and Accessory Dwelling Unit Remodel Process

To get started, call today at (808) 723-1588 for a custom estimate or simply fill out our contact form with the details YOU are looking for in an ADU. We can help guide you through the design process, establish your wants and needs of the ADU, then begin the construction process. We look forward to working with you and creating a beautiful addition or remodel for your family.

Our Home Addition and Hawaii ADU Services.

H-1 Construction, LLC strives to provide you with the services you need to build and design the ideal home addition or Hawaii accessory dwelling unit. This includes adding a complete, custom accessory dwelling unit, building an Ohana unit, or remodeling an existing ADU. And not to worry, at H-1 Construction, we will handle the permitting and planning with the city.

Our custom ADUs allow you full control over the layout, design, and just about any feature of an ADU, including window and door options, interior packages or interior kits, bathroom and kitchen options, custom trims and roofing, fixtures, and flooring, or additional cabinetry. Our ADUs are built to withstand Hawaii’s moist climate and come equipped with a standard warranty. H-1 Construction, LLC will work with you on virtually any Hawaii Home Addition or Hawaii Accessory Dwelling Unit plan that you can think up. You only need to provide the dream; let us bring it to reality.

hawaii adu examples

What Our Homeowners Have to Say:

See what our happy homeowners have to say about our work.

Ready to Get Started on Your ADU Project?

Schedule Your On-Site Consultation Today!

H-1 Construction, LLC is a licensed General Contractor, BIA Award Winner, and receives an A+ rating from the Better Business Bureau.

Our service areas span nearly all of the Hawaiian Islands, including Kaua’i, Oahu, Maui, Lana’i, Hawai’i Island, and Moloka’i.

We will work with you to design and build the perfect Hawaii ADU – Accessory Dwelling Unit for you and your Oaha.

Our Previous Projects

Take a look at the gallery below to see examples of the homes we have worked on.