Warrior Construction (license #BC-34373) builds ADUs and ohana units across O'ahu, including detached cottages, garage conversions, and attached units. Costs range from $150K–$600K+. They manage design, permitting, and construction end-to-end.
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Coulson Hawaii offers full-service ADU construction on Oahu, managing design, permits & build. Specializing in second-story additions, in-law suites & wheelchair-accessible granny flats to help Hawaii families maximize their property.
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Affordable Portable Housing Hawaii is a design-build company specializing in shipping container homes, offices, and structures. They offer drafting, permits, and full project development with financing options available.
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Small Cottages Hawaii, a division of Canaan Builders LLC founded in 1978, specializes in permitted ADU construction across Oahu. Offering custom and pre-designed backyard cottages compliant with Honolulu's 2015 ADU Ordinance, they provide quality housing solutions adding property value.
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Solid Built Construction, Inc. is a licensed Honolulu contractor serving Oahu since 2007. Based in Hawaii Kai, they offer custom homes, ADU construction, remodels, additions, and renovations across Kahala, Kailua, and Honolulu.
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Ward Design Center is a design-build firm specializing in ADUs, garage conversions, granny flats, JADUs, and in-law suites. They guide homeowners through planning, design, permitting, and construction for functional, custom living spaces.
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Hilweh Builders LLC is an Oahu, Hawaii general contractor specializing in ADUs, home additions, and design-build remodeling. Led by Chad Hilweh, they offer integrated architect collaboration, on-budget project management, and Hawaii-specific residential construction expertise.
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In the heart of Honolulu, a quiet change in residential architecture is happening with Accessory Dwelling Units (ADUs). These well-designed living spaces are more than just extra square footage—they represent the spirit of ‘ohana and provide a practical solution to Hawaii’s housing problems.
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At R. Clary Builders, we know that ADUs can be a necessary home modification process, and are available to provide you with all necessary support during the construction process. Even if you do not have a pressing need for a home extension, Kailua accessory dwelling units can have several advantages.
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From Ohanas (ADU) to luxury custom houses, we pride ourselves in offering uncompromising results and unquestionable ethics.
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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.
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Homeowners Design Center in Honolulu, Hawaii, offers ADU design, kitchen & bathroom remodeling, and interior finish products. Family-owned with 40+ years of experience, they serve residential and commercial clients with custom, quality-driven solutions.
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All Phase Construction LLC is a Honolulu-based contractor serving Oahu, Maui, Big Island & Kauai since 2013. Specializing in ADU construction, custom homes, additions & concrete work across Hawaii.
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Accessory Dwelling Units (ADUs) are a fantastic way to maximize your property’s potential. Whether you’re looking to create a guest house, rental unit, or additional living space for family members, our ADU construction services provide a versatile and comprehensive solution tailored to your needs.
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General Contractors Oahu offers home additions & ADU construction across Oahu, Hawaii. Services include bedroom, bathroom, second-story additions & granny flats. Licensed, insured & bonded with a 1-year labor warranty. Free estimates available.
read moreKapolei, often referred to as Oahu's "Second City," is one of Hawaii's fastest-growing urban centers, located on the western coast of Oahu. As the city continues to expand with new residential developments, master-planned communities, and a growing population, the demand for Accessory Dwelling Units (ADUs) has surged significantly. Experienced ADU contractors in Kapolei understand the unique landscape of this planned city, where newer subdivisions and HOA-governed communities require careful navigation of both state and county regulations before breaking ground.
ADU construction in Kapolei falls under the jurisdiction of the City and County of Honolulu's Department of Planning and Permitting (DPP). Hawaii has made significant strides in encouraging ADU development to address the state's well-documented housing shortage. Key regulations that qualified ADU contractors must follow in Kapolei include:
Hiring a locally experienced ADU contractor in Kapolei is essential for a smooth and compliant build. Local contractors are familiar with the specific soil conditions, flood zone designations, and hurricane-resistant building codes that apply throughout West Oahu. Kapolei's proximity to the coastline means that wind and moisture resistance are critical factors in material selection and construction methods. Additionally, many Kapolei neighborhoods are part of master-planned communities with their own Homeowners Association (HOA) guidelines, which may impose additional design and aesthetic requirements beyond standard county permits.
Professional ADU contractors in Kapolei typically specialize in several types of accessory dwelling units suited to the area's residential landscape:
With Kapolei's real estate values continuing to rise and rental demand remaining strong across West Oahu, building an ADU is a smart investment. Working with a licensed and insured ADU contractor in Kapolei, Hawaii ensures your project meets all DPP requirements, HOA standards, and Hawaii's strict building codes — delivering long-term value and peace of mind.