ADU Models & Resources
ADU models available throughout Hawaiʻi from design to completion
Accessory Dwelling Units (ADUs)
HPM ADU Models intro
As the cost of living in Hawaiʻi continues to rise, Accessory Dwelling Units (ADUs) offer a practical solution to the state's pressing housing challenges. ADUs not only help address the critical housing and rental shortage but also provide an excellent option for multigenerational living, a cherished part of our island culture. Recognizing that each county in Hawaiʻi has its own unique set of ADU requirements, we've compiled comprehensive resources for all counties, making it easy for you to evaluate if you meet the qualifications for building an ADU on your property. Our goal is to simplify your journey towards creating additional living space that benefits both your family and the broader community.
Why Choose Our ADU Models?
Speedy Construction & Permitting
Accelerate your ADU project with our Hawaiʻi Island pre-approved models designed for our unique building landscape. These plans significantly streamline the permitting process, saving valuable time. With expedited approvals, construction can begin sooner, allowing you to complete your ADU more quickly. All models listed here are available for purchase statewide.
Affordable & Adaptable
Our ADU options balance cost-effectiveness with flexibility for Hawaiʻi properties. While our select Hawaiʻi Island pre-approved models offer a streamlined process, we also offer non-pre-approved models that allow for slight modifications to suit your needs. All designs can easily comply with state and county guidelines and regulations, offering you efficient, versatile ADU solutions.
Expert ADU Support
Our Home Planning Consultants guide your ADU journey from site assessment through completion, navigating complex local regulations and streamlining the permitting process. We're committed to empowering you with site-specific insights and design expertise, helping maximize your property's potential while ensuring an efficient path to realizing your vision.
Our Available ADU Models
Choose from our selection of ADU HPM Homes floorplans to streamline your building process in Hawai‘i. County requirements for ADUs differ by island, so please speak with a Home Planning Consultant or research your county's planning department specifications.
*Pre-approved only applies to the plans and designs on Hawaiʻi Island. However, all models listed (pre-approved or not) are still available for purchase statewide.
Understanding ADUs in Hawaiʻi
An Accessory Dwelling Unit (ADU) is a secondary living space on a single-family residential lot, offering opportunities for additional housing or multigenerational living. While each county provides basic ADU guidelines, determining what's possible for your specific property involves navigating multiple factors:
Key Considerations:
- Minimum lot size requirements
- Maximum allowable square footage
- Parking requirements
- Water supply systems
- Sewer/septic requirements
- Setbacks and open yard requirements
- Clearances between structures
- Separate entrance requirements
- And more
What Makes ADU Planning Complex:
- Requirements vary significantly by county
- Multiple factors affect what's actually feasible on your property
- Each county approaches regulations differently
- Requirements can change over time
- Local conditions may impact specific requirements
Important Note: As of September 2024, ADU regulations and requirements vary by location in Hawaii and can change. Always verify current requirements with your local Planning Department. Your HPM Home Planning Consultant can help navigate these complex requirements and determine what's possible for your specific property.
ADU Resources by County
For the most current ADU regulations, permit requirements, and zoning information in Hawaiʻi, please refer to these official sources.
Hawaiʻi County
- Ohana Dwelling Application (pdf)
- Hawaii County Code Chapter 25 Zoning - Division 3. Ohana Dwellings, Page 153
- Apply for a Land Use Permit (County of Hawaiʻi Planning Department)
Honolulu County
- Accessory Dwelling Unit FAQs - C&C of Honolulu, Department of Planning and Permitting (DPP)
- ADUs, A Quick Guide to Build a Second Unit on Your Lot - C&C of Honolulu, DPP
- ADU Public Facilities Pre-Check Form
- Declaration of Restrictive Covenant for ADU - C&C of Honolulu, DPP
- For news and latest ADU-related announcements, visit the Honolulu Planning & Permitting website
Maui County
- Ohana/Accessory Dwellings, FAQs - County of Maui
- Code of Ordinances - 19.35 Accessory Dwellings - County of Maui
Kauaʻi County
- Additional Dwelling Unit and Additional Rental Unit Online Forms, County of Kauaʻi
- Residential Zoning Parcel Build Out Guide, County of Kauaʻi Planning Department
Receive Our HPM Homes Pricing Guide and Get Started Today!
Transform your property with an Accessory Dwelling Unit (ADU) tailored to Hawaiʻi's unique needs through HPM's streamlined ADU process. Our expert Home Planning Consultants will guide you through each step, from selecting the right ADU model to permitting and modifying it for your specific lot and lifestyle. We'll provide detailed cost estimates, ensuring you make informed decisions about your investment.
Whether you're looking to support multigenerational living or create rental income, we'll help you navigate county-specific requirements and maximize your property's potential. With HPM, adding an ADU is easier than you might think. Contact us today for a free consultation and discover how we can bring your ADU vision to life.