RealHomes Construction plans and builds accessory dwelling units (ADUs) and garage conversions for homeowners throughout Orange County, California. An ADU can add living space for family, flexibility for the future or rental potential — but the right solution always starts with the property itself. As a California-licensed B – General Building Contractor (CSLB #1149773), we begin every ADU project with a site review and a written scope.
ADU Options We Build in Orange County
Detached ADUs
A detached ADU is a separate structure, usually in the backyard or side yard. It offers the most privacy and independence for the people living in it and for the main household.
Attached ADUs
An attached ADU connects to the existing home while keeping its own entrance and living space. It can make sense when yard space is limited or when you want the new unit close to the main house.
Garage Conversions
Converting an existing garage into a living unit can reuse a structure you already have. Feasibility depends on the condition of the structure, utilities, access and local requirements.
Existing-Space Conversions
Some homes have qualifying interior space that can be converted into a separate unit. We review the layout, systems and requirements before recommending this path.
Six Questions to Answer Before ADU Design
A backyard may look big enough, but several factors decide what an ADU can realistically be. Before choosing a floor plan, we look at:
- Lot and access — the size and shape of the lot and how people will reach the unit.
- Existing structures — where the main house, garage and other buildings sit on the lot.
- Utilities — the location and capacity of electrical, water, sewer and gas service.
- Fire access — how emergency access requirements affect placement.
- Planning rules — the requirements that apply to your specific property and city.
- Intended use — family members, guests, a home office or future rental.
ADU rules and approval requirements vary by property and jurisdiction, so we confirm feasibility before you commit to a design, price or schedule.
Our ADU Process
Most ADU projects follow a clear sequence. We move to the next stage only when the information it needs is defined and documented.
- Goals — how you plan to use the ADU, your priorities, timing and budget range.
- Feasibility — site review of the lot, existing structures, access and utilities.
- Plans — coordination of qualified design and engineering professionals when included in the scope.
- Permit — submission, plan-check comments and approvals.
- Prebuild — selections, schedule and site readiness.
- Build — construction with inspections, schedule updates and written change documentation.
- Closeout — final walkthrough, completion items and organized project records.
Learn more about how we organize every project.
Why Homeowners Work With RealHomes on ADUs
- California licensed — B – General Building Contractor, CSLB #1149773. Verify with the CSLB before you sign.
- Orange County focus — we work locally, in cities such as Anaheim, Garden Grove, Westminster, Fountain Valley and Santa Ana.
- Written scope — work, exclusions, selections and responsibilities are documented.
- Documented changes — any price or schedule effect is reviewed in writing.
- One point of contact — with regular project information.
- English and Vietnamese — we can discuss your project in either language.
Is an ADU the Right Fit?
If your home simply needs another bedroom connected to the main house, a room addition may be a better option. If you have enough space but the layout is not working, consider a home remodel. We can help you compare the options for your property. You can also read our guide: What is an ADU?
ADU Questions
Can I build an ADU on my property?
It depends on the lot, existing structures, access, utilities and the rules that apply to your property. A site review is the most reliable way to find out.
How much does an ADU cost?
Cost depends on the type of ADU, size, site conditions, utilities, design, permits and finishes. A reliable price requires a site review and a defined scope.
How long does an ADU take?
Timing depends on scope, design decisions, permit review, materials, inspections and existing conditions. We identify key decision dates early to help protect the schedule.
See more answers on our FAQ page.
Planning an ADU in Orange County?
Send us your property address, how you would like to use the ADU and any photos or plans you have. We will start with a feasibility review and recommend the most practical ADU path for your property.