A second home in your backyard
A complete, self-contained second home on your property — for rental income, family space, or a dedicated studio. Factory-built, installed across Southern California.
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Factory-built, set beside your home
As Southern California prefab installers, we take a factory-built unit and set it on a permanent foundation on a property with an existing single-family residence. From there, we handle the required connections, inspections, and finish work needed to make the ADU livable and code-compliant.
Adding a new ADU can also increase overall property value — often by more than the cost of the ADU itself — making it a value-accretive improvement to your property.
A prefab ADU arrives largely complete, helping eliminate weeks of on-site framing, drywall, and other trade work, along with the weather delays and site disruption that often come with traditional construction. Manufactured ADUs are built to the federal HUD Code, while modular ADUs are built to the same state and local codes as site-built homes — so much of the work is completed in a controlled factory environment, which can mean fewer on-site construction steps, fewer inspections, and less disruption to your property.
The law is on your side
A landmark California law that banned local minimum lot sizes and cut permit review to a strict 60-day deadline. It forced cities to allow the simultaneous addition of both an ADU and a Junior ADU (JADU) on a single-family property, while eliminating costly replacement-parking requirements.
One licensed team, fewer surprises
- A completely self-contained home with its own private entrance, designated bedroom(s), bathroom(s), and a full kitchen.
- Less on-site work. Manufactured ADUs are built to the federal HUD Code, modular ADUs to the same codes as site-built homes. Because much of the work is completed in a factory, prefab ADUs typically require fewer on-site construction steps and inspections than stick-built construction.
- One licensed team handling permitting, site prep, foundation, utilities, set-up, and finish work under California contractor license #999468.
- Lot guidance up front. We help you understand what your lot can support under California ADU rules. A single-family property may generally allow multiple ADU options if there is enough space and the units meet state floor-plan limits, setbacks, and heights.
- Funding options explained. We can walk you through common funding options — HELOCs, home equity agreements, construction loans, and refinancing once the project is complete.
Not sure what your lot allows?
Send us the address and what you have in mind. We’ll come back with the ADU options your property can actually support — before you spend anything.
ADU types & size limits
ADU questions we hear most
Plan on several months rather than several weeks. Design and permitting is usually the longest stretch — California caps ADU permit review at 60 days under AB 68, but the clock only starts once a complete application is in. Factory build and site work (foundation, utilities, set) then run in parallel where possible. We give you a schedule specific to your city and lot before you commit.
A detached ADU can generally go up to 1,200 sq ft. A Junior ADU (JADU), which is created within the walls of the existing home, is capped at 500 sq ft. Attached ADUs are generally limited to 50% of the primary home’s floor area, with state-exempt pathways allowing up to 800 sq ft. Setbacks, height limits and your lot size all factor in — we confirm the real number for your property up front.
On a single-family property, yes — AB 68 requires cities to allow both a detached ADU and a Junior ADU on the same lot, provided the units meet state floor-plan limits, setbacks and heights. If your property is multifamily, SB 1211 opens up considerably more.
It’s the code they’re built to. Manufactured homes are built to the federal HUD Code; modular homes are built to the same state and local codes as a site-built house. Both are finished in a factory and set on your lot. Which one suits you depends on your city, your financing, and what you want the unit to do — we walk through the trade-off before you choose.
We do. One licensed team handles permitting, site prep, foundation, utility connections, set-up and finish work under California contractor licence #999468 (B General Building and C-47 Manufactured Housing). You have one point of contact rather than a chain of subcontractors.
Most California ADU projects are funded from home equity — a cash-out refinance, a HELOC, or a home equity agreement — while ground-up builds without enough liquid equity often use a construction loan. We cover the trade-offs in detail in our guide to ADU financing in California.
Before you spend a dollar, we tell you what your lot allows — and which ADU path fits your budget, goals, and long-term plan.
What can your backyard hold?
Tell us your goals and we’ll tell you exactly what’s possible on your lot.