Trusted by Homeowners
Across Southern California
Custom Spaces.
Built to Belong.
Thoughtful design. Lasting craftsmanship.
ADU Construction Services Across Southern California
SE Builders designs and constructs detached ADUs, attached additions, and garage conversions for homeowners across Southern California — managing feasibility, permitting, construction, and final inspection under one accountable team.
Custom ADUs designed and built to add livable space and lasting value to your property.
Full-service
Feasibility through final inspection
Detached, attached & garage conversion ADUs
ADU Construction Services Across Southern California
SE Builders designs and constructs detached ADUs, attached additions, and garage conversions for homeowners across Southern California — managing feasibility, permitting, construction, and final inspection under one accountable team.
Spaces We Build for Better Living
Detached ADUs
Standalone backyard living spaces built for family, guests, rental use, or flexible property needs.
Garage Conversions
Convert an existing garage into a livable, code-conscious space with proper utilities, finishes, and layout.
A Clear Path From Idea to Move-In
We keep your ADU project organized and predictable, coordinating every phase so you always know what comes next.
Built for Southern California
Locally experienced. Detail-focused. Built to last.
Quality & Long-Term Value
Ready to Add Space and Value With an ADU?
Let's talk about your property and goals. SE Builders will help you plan a custom ADU or garage conversion built for the way you live.
Get a QuoteFAQ
Frequently Asked Questions
SE Builders builds detached ADUs, attached ADUs, garage conversions, guest suites, home office and flex spaces, and outdoor living upgrades for homeowners across Southern California.
SE Builders serves ADU construction and garage conversion projects across Southern California, including Los Angeles, Orange, Riverside, San Bernardino, and Ventura counties.
Timelines vary based on scope, size, permitting, and site conditions. Our team reviews your specific project and plans to provide a realistic schedule before construction begins.
Yes. We handle everything from feasibility and permit-ready design packages through construction and final inspection, including multi-unit ADU developments.
Still have questions?
Talk to Our TeamWant to Know More About Our Services?
Our Projects
See completed ADU and garage conversion work, including our multi-unit ADU development in Monrovia, CA.
View ProjectsGet a Quote
Tell us about your ADU or garage conversion project and get a realistic plan and schedule.
Start HereCommercial & Industrial Construction
Full-scope construction for warehouses, manufacturing facilities, and commercial buildings.
Learn MoreService Areas
We Also Serve These Areas
Los Angeles County
Alhambra, Arcadia, Atwood, Avalon, Azusa, Bellflower, Beverly Hills, Burbank, Calabasas, Carson, Cerritos, Claremont, Commerce, Compton, Covina