Los Angeles · Diamond Bar · Pomona
Your home. More possibilities.
We help Los Angeles homeowners design and build ADUs, additions and remodels. Also serving Diamond Bar and nearby cities.
CSLB License #1026926General contractor
Watch first
One team
Design, permits and construction under one roof. One contract, one point of contact.One fixed price
We verify your property first, then the price is fixed. If the property surprises us later, that’s ours to absorb, not yours.No guesswork
About forty feasibility checks happen before any ADU is designed or priced.Why us
Feasibility
Design
Permits
Construction
Floor plans
Browse our floor plan library: 1 to 4-bedroom detached ADUs from 400 to 1,200 sq ft. Build one as it is, or use it as the starting point for your own design.
The Uni Construction approach
Design first. Clear scope. One clear process.
Most ADU problems start before construction. A price that was guessed. A design that doesn’t fit the lot. A project passed between three companies. We built our process to remove those problems early.
Close to home
Serving homeowners across Los Angeles and surrounding cities, with offices in Diamond Bar, Los Angeles, and Pomona.
Your local team
Already have plans?
What we design & build
An ADU, a converted garage, or more room for everyday life. Explore the ways we can help you design and build.
Turn your unused backyard or empty space into income-producing square footage. Whether for long-term rental income, multigenerational living, or added property value, each detached ADU build is structured for performance and ROI.
Explore serviceTurn underused garage space into livable space while minimizing construction costs. Whether designed for rental income or extended family living, our team manages the permitting process and handles local regulations from start to finish.
Explore serviceFrom a productive home office to a comfortable guest suite or expanded living space, our room additions increase usable square footage while enhancing long-term property value.
Explore serviceCreate a practical design before committing to the details of construction. Uni Construction helps translate household needs and property constraints into layouts, exterior decisions, and an agreed path toward project documentation.
Explore serviceMove from a concept to a project that can be reviewed, understood, and priced. Uni Construction connects building design with the required engineering and permit documentation for ADUs, additions, remodels, and other agreed building work.
Explore serviceConnect the plans with the people, materials, and work needed on site. Uni Construction provides construction services for agreed residential and light commercial projects, with the scope, responsibilities, selections, and change process established before work begins.
Explore service
“Very informative and experienced. Uni helped with my ADU from beginning and made the process smooth as possible. Fee was great compared to other firms. Very fast response.”
Esther K.
Uni Construction client · Yelp
Getting started
Book a 30-minute call
Discuss your property
Review your proposed scope
OUR PHILOSOPHY
Don’t compare builders.
Compare processes.
We verify before we price
Most mistakes happen when a price comes before the facts. We confirm zoning, city rules, utilities and site conditions before design moves forward.We plan before we build
Schedules, permits and site logistics are set early. So construction runs on a plan, not on reactions.You always know where things stand
Agree communication, decisions and stage approvals with your project team.Straight answers about cost, timelines, permits and how we work.
We provide ADU design and construction, garage conversions, additions, remodeling, building design, drafting and engineering coordination. We start with your property and goals, then define the services and deliverables in a written proposal.
We serve Los Angeles and surrounding cities, with offices in Diamond Bar, Los Angeles and Pomona. Nearby communities include Walnut, West Covina, Brea, Fullerton, La Habra, Pasadena and Claremont. Contact us with your address to confirm the right local team.
Book a free 30-minute consultation or submit our contact form with your property address, project type and priorities. Existing drawings, site photos and a target budget help us prepare for the conversation.
Yes. We can discuss building design, drafting or engineering coordination as a separate scope. Your proposal should identify the drawings, revision allowances, consultant responsibilities and any construction services you want included.
CEO Min Kang leads Uni Construction. Uni Construction is a DBA of Orep Development Inc.
Start with a free 30-minute consultation. Share the property address, your preferred ADU type, approximate size and budget. We review the information with you and define the design and construction scope before preparing a proposal.
There is no single timeline for every property. Design revisions, agency review, utility work and construction each affect the schedule. Ask for a project-specific timeline with separate milestones for drawings, permits and building work rather than treating an online estimate as a completion promise.
Yes, share your ideas, drawings and any permit comments during the consultation. We can assess the work needed to develop or revise the design. The proposal will identify which existing documents can be used and which need further coordination.
We discuss your project goals, review available property information, develop a layout and coordinate the drawing scope. We then work through the agreed revisions and construction planning. Each stage should have a clear deliverable before you commit to the next.
Share your drawings and any agency comments so we can review their stage and completeness. We will discuss what can be used, what needs revision and whether additional consultant input is required.
Discuss the effect on drawings, cost and schedule before authorizing a change. Keep approved changes and finish selections in writing so everyone works from the same scope.
Prioritize a practical layout before adding floor area. Useful storage, daylight, a straightforward kitchen and a bathroom that is easy to use matter more than decorative complexity. Consider furniture placement and privacy from the main home while the plan is still easy to change.
That depends on the work and its effect on access, utilities and safety. A detached build may allow more separation than an interior conversion. Discuss temporary interruptions and any relocation needs before construction is scheduled.
Review relevant work, genuine client reviews, license information and the written scope. Compare who is responsible for design coordination, permits, allowances and change orders. A clear agreement and realistic communication are more useful than an unsupported low headline price.
