Design, permits, and construction under one roof. Family-owned, LA-based, and built for how Angelenos actually add space, income, and value to their property.
Ground Up Builders is a family-owned general contractor building accessory dwelling units across Los Angeles. We handle the full ADU from start to finish: feasibility and design, city permits, and construction, so you work with one team from the first drawing to the final sign-off. Whether you are converting a garage, adding a detached unit in the backyard, or building a junior ADU inside your home, we build it to LA code and to last.
ADU Types We Build Across Los Angeles
We build every ADU type the city allows, matched to your lot, your budget, and what you want the space to do.
Existing garage into a legal, livable unit. Fastest, most affordable route to a rentable ADU.
Standalone backyard unit, one or two stories, full privacy.
Addition sharing a wall with its own entrance.
Compact unit within the home footprint, up to 500 sq ft.
Living space over a garage, for tight lots.
Factory-built, installed on site, faster timeline.
How Much Does an ADU Cost in Los Angeles?
ADU cost in LA depends on the type, size, site conditions, and finishes, so the honest answer is that it ranges. A garage conversion typically lands at the lower end, and a new detached two-story build at the higher end. Rather than guess, get a real number for your property with our ADU cost calculator, then we will walk through it together on your consultation.
Where We Build ADUs in the LA Area
We are a local LA builder, not a franchise. We build ADUs across Los Angeles, Orange, and Ventura counties, including the San Fernando Valley, the San Gabriel Valley, and the Westside.
Pasadena · Arcadia · Alhambra · Monterey Park · Van Nuys · Sherman Oaks · Studio City · Santa Monica · Marina del Rey · Beverly Hills · Bel Air · West Hollywood · Echo Park · Altadena · Sierra Madre · Temple City · Rosemead · El Monte · La Crescenta-Montrose
Why Homeowners Choose Ground Up Builders
17 Years and Thousands of Projects
We have built across LA for over 17 years, and we build ADUs to the same standard as a full home.
One Team, Start to Finish
Design, permits, and construction in-house, so nothing gets lost in a handoff.
Licensed, Bonded, and Insured
A fully licensed California general contractor (CSLB #911849), so your project is done right and by the book.
Family-Owned and Local
You deal with the people who actually build your ADU, not a call center.
Rated 4.9 stars across 90+ Google reviews and 4.8 stars across 187 Yelp reviews.
Our ADU Process, From First Call to Final Permit
- Free consultation. We look at your property, goals, and budget, and tell you honestly what is possible.
- Design and feasibility. A plan that fits your lot and the city’s rules.
- Permits. We prepare and manage the submittal so you are not chasing the city.
- Construction. Our crew builds it, keeping you updated.
- Final sign-off. A finished, permitted, move-in-ready ADU.
ADU FAQs
Ready to Add Space, Income, or Value to Your LA Home?
Let’s talk through your ADU. The consultation is free, and you will leave knowing what is actually possible on your property.
Get Your Free ADU Consultation
