SoCal has opened residential lots to more housing — and prefab is one of the fastest, most cost-effective ways to take advantage of it.
Start a Project InquiryBuiltADU installs prefab units on multifamily properties across SoCal — from single-story duplexes to larger multi-unit projects for developers, REITs, and real estate investment companies.
Once permits are secured, units can begin manufacturing off-site at the factory while our licensed crew handles site prep, foundations, utilities, and installation in parallel. For our B2B clients, speed and execution are critical, so we place a strong focus on proper phasing, coordination, and keeping each project moving on schedule.
Because multiple units are built at the same time in the factory while site work progresses on-site, prefab multifamily projects can bring income-producing units online much faster than traditional ground-up construction. Clients may also benefit from pricing efficiencies when purchasing multiple units from the same factory — either through our MH dealer license or through another dealer they already work with.
A California lot-split law that gives qualifying landowners a ministerial, by-right path to subdivide a single lot into up to 10 parcels and build up to 10 residential units, subject to objective standards.
Allows an existing multifamily property to support up to eight detached ADUs, provided the number of ADUs does not exceed the number of existing units already on the property. The approval process remains ministerial — no hearings or discretionary review.
Each unit is installed on a permanent foundation, inspected on site, and registered as real property.
For multifamily, the manufactured-versus-modular decision helps determine what can actually be built.
Single-story structures — so a manufactured multifamily project typically means units set side by side on one level.
Built to the California Building Code, the same code as any site-built apartment building, and able to support vertical construction. Some designs go several stories, depending on manufacturer, design, site, and local requirements.
If your pro forma requires stacked units, a two-story building, or three or more stories to support the land cost, then modular is likely the better fit. We help you weigh both against lot size, target unit count, budget, and return goals — and for larger modular projects, choosing the right manufacturer is critical and depends heavily on the type of project being built.
Compare manufactured vs modularOwn a lot? Find out how many units it can carry — and how fast. Start with us.
Send us the lot and the goal
We’ll tell you what it can carry — and how fast.