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ADU Planning & Feasibility
Review property conditions, site constraints, options, and a potential project path.
Local ADU planning & construction
Make more of
your property.
Build an ADU.
From feasibility and design coordination to permitting and construction, explore ADU possibilities with a local general contractor.
Diamond BarWalnutRowland Heights
Kona Construction Inc. · California contractor license #B1094002
DESIGN · PERMITS · BUILD
What we do
ADU services from concept through construction
Practical guidance for homeowners looking to add usable space, accommodate family, or explore potential rental income.
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Garage Conversions & New ADUs
Explore detached units, attached additions, and garage conversion opportunities.
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Additions & Remodeling
Coordinate construction scopes that fit your household's evolving needs.
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Permitting & Code Guidance
Navigate project requirements, plan review, and required approvals with the appropriate professionals.
A smarter use of space
Let your property reach its greater potential.
ADUs can be a flexible way to make an existing residential property work harder for you. Feasibility, cost, rental use, and approvals vary by property and jurisdiction.
- Potential to increase property utility and value
- Explore additional rental income opportunities
- Create space for multigenerational living
- Customize the design for your site and goals
Built around your goals
From “Could we build?” to a practical project plan.Begin with a conversation about your parcel, estimated budget, and preferred ADU use. We’ll help you identify the next steps before you commit to a construction path.
Discuss My Property →How it works
Three steps to getting started
STEP 01
Tell us about your property
Share the city, property address, and your ideas for an ADU or garage conversion.
STEP 02
Explore feasibility
Discuss site conditions, potential options, budget considerations, and permitting questions.
STEP 03
Plan the project
Outline a practical next step for design, approvals, and construction.
Proudly serving
Diamond Bar · Walnut · Rowland Heights
Local ADU planning, garage conversions, additions & construction.
Start with a conversation
Request your free ADU consultation.
Tell us about your project and we’ll help you identify the appropriate next steps. For the quickest response, call either contact directly.
Willie Kuo · Project Manager
(626) 768-2222
Vincent M. Lin · General Contractor
(626) 272-2202
Email: KonaConstruction888@gmail.com
Office: 18633 E. Gale Ave. #108, City of Industry, CA 91748
California contractor license: B1094002. Services, timelines, pricing, and permitting are subject to project review and local regulations.
Tell us about your ADU project
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