From a 400 sq ft studio to a two-story detached unit, we design, permit, and build accessory dwelling units tailored to your property and your goals.
A fully independent structure built in your backyard. Detached units offer the greatest design freedom and the highest rental value — they have their own entrance, kitchen, bathroom, and utility connections, and they do not share a wall with your primary home.
Ideal for long-term rental income, multigenerational family housing, aging parents, adult children, or a private guest house. We handle utility trenching, foundation work, and all site grading.
An addition to your primary residence that functions as a separate dwelling. Attached units share at least one wall with the main home but have their own entrance, kitchen, bathroom, and sleeping area.
Because they reuse existing foundation and rooflines, attached ADUs usually cost less per square foot than detached units and often move through plan check faster.
The most affordable path to a legal dwelling unit. We convert your existing garage into a permitted ADU — new slab if needed, insulated walls, full bathroom, kitchenette, HVAC, and Title 24 compliant glazing.
Because the structure already exists, garage conversions typically avoid major site work and can be finished faster than ground-up construction.
Build upward instead of outward. An above-garage ADU places a full dwelling unit on a new second story over your existing or newly built garage, preserving yard space and maximizing the buildable area of your lot.
Structural reinforcement of the garage framing is included. This is a strong choice for narrow lots or properties where setbacks limit ground-level footprints.
A Junior ADU is a compact unit up to 500 square feet built inside your existing home, with its own entrance and a small efficiency kitchen. JADUs enjoy simplified permitting, lower fees, and in most California cities cannot be counted against your lot's unit cap.
Common configurations include converting a spare bedroom suite, a finished basement, or a portion of an oversized primary bedroom wing.
Mixed-use and commercial properties can now add residential units under recent California law. We handle the zoning analysis, use-permit work, and construction for converting a portion of a commercial building — retail back-of-house, office mezzanine, or an underused storage structure — into a legal dwelling.
We also build non-residential ADU structures: accessory offices, studios, workshops, and detached guest quarters that do not require a kitchen or full-time sleeping facilities.
Every ADU we build comes with the design, permitting, and project management services needed to complete it — no separate vendors to coordinate.
In-house designers produce floor plans, elevations, roof plans, and site plans tailored to your budget and the specific requirements of your jurisdiction.
We prepare and submit the full permit package, respond to plan-check comments, and coordinate every inspection with your city or county.
Stamped structural calculations, foundation design, and framing plans prepared by licensed California engineers and delivered as part of the permit set.
Electrical, gas, water, and sewer connections coordinated directly with your utility provider. New meters installed where required by code.
Compliance documentation, high-efficiency HVAC, insulation, and glazing specified to meet California energy standards on the first inspection.
One dedicated project manager from feasibility through final walkthrough. Weekly progress updates and a single point of contact throughout.
A quick reference to help narrow down which type fits your property, budget, and timeline.
| ADU Type | Size Range | Permit Time | Total Timeline | Relative Cost | Details |
|---|---|---|---|---|---|
| Detached ADU | 500 – 1,200 sq ft | 60 – 90 days | 6 – 10 months | Highest | View |
| Attached ADU | 400 – 900 sq ft | 45 – 75 days | 5 – 8 months | Moderate | View |
| Garage Conversion | 300 – 500 sq ft | 30 – 60 days | 3 – 5 months | Lowest | View |
| Above Garage ADU | 500 – 900 sq ft | 60 – 90 days | 7 – 10 months | Moderate–High | View |
| Junior ADU (JADU) | 150 – 500 sq ft | 30 – 45 days | 2 – 4 months | Lowest | View |
| Commercial ADU | 400 – 1,500 sq ft | 90 – 150 days | 6 – 12 months | Varies | View |
Send us the address and your goals. We will tell you which categories your lot can support, what each will roughly cost, and which is likely to give you the best return.