ADU Construction in Los Angeles — Built Right, Permitted Fast
Constructora Carrillo LLC is a licensed general contractor based in Huntington Park, CA. We build custom ADUs, garage conversions, and room additions for homeowners across Los Angeles County — in English and Spanish.
What Is an ADU? (And Why Los Angeles Is Building More Than Ever)
An ADU — Accessory Dwelling Unit — is a second, self-contained home on your existing residential lot. It can be a new structure in your backyard, a converted garage, or an addition attached to your home. It has its own entrance, kitchen, and bathroom. It's a full home, just smaller.
California has made it easier than ever to add one. Starting with AB 68 and continuing through SB 9 and a series of follow-up laws, the state has removed most of the old barriers that made ADU projects slow and expensive. Today, most compliant ADU applications in Los Angeles must be approved within 60 days. Many homeowners can build by-right — no discretionary hearings, no neighborhood approval process.
The reasons people build ADUs in Los Angeles are practical. Some want rental income to offset their mortgage. Others want a separate living space for an aging parent or an adult child. Some want to increase the long-term value of their property in one of the most competitive real estate markets in the country. Whatever the reason, the opportunity is real — and that's where we come in.
Why Choose a Contractor Who Actually Knows Los Angeles
We Work Where You Live
Pedro Carrillo is based in Huntington Park — in the heart of Southeast Los Angeles. He has built in unincorporated LA County, in City of LA jurisdictions, and in neighborhoods from Compton to Gardena, and he understands how differently each area operates.
No Permit Surprises
ADU permitting in Los Angeles runs through LADBS and, depending on your address, through separate municipal agencies. Utility connection fees, setback requirements, SB 13 compliance — these vary by neighborhood and catch out-of-area contractors off guard. We know what to expect before we submit a single document.
We Speak Your Language — Literally
A large share of Los Angeles homeowners are Spanish-speaking, and navigating a construction project in your second language adds unnecessary stress. Constructora Carrillo serves both English- and Spanish-speaking clients with the same clarity and professionalism. You deserve to understand every decision being made about your home.
ADU Services We Offer Across Los Angeles County
Custom Detached ADU Construction
A new detached ADU is built from the ground up on your existing lot — separate from your main home, with its own entrance and utilities. We handle plans, engineering, permit filing, and full construction, and we've done this work across East LA, South LA, the San Gabriel Valley, and unincorporated parts of LA County.
Garage Conversion to ADU
Converting a detached or attached garage is often the most cost-effective way to add an ADU in Los Angeles — typically at a fraction of the cost of a new build. It's a common path in South Gate, Maywood, Bell, and Huntington Park, where detached garages sit underused on residential lots that are otherwise tight on open space.
Room Addition / Junior ADU (JADU)
A Junior ADU is an attached unit created from an interior room or addition — it qualifies under California law for most single-family lots in Los Angeles. JADUs involve less site disruption and often move through the permit process faster than a detached build. They're a strong option for families who want connected living while maintaining separation.
ADU Design + Permit Filing Support
We coordinate with licensed architects and manage the full LADBS submission process on your behalf. Before any work begins, we give you a clear picture of utility connection fees — LADWP, SoCalGas, and others — so there's no sticker shock when the project is underway.
Licensed, Insured & Trusted Across Los Angeles
California law requires a licensed contractor for any project over $500. Our CSLB license number is publicly verifiable — we encourage you to look it up. We carry full liability insurance and have been building in the Los Angeles area for over 10 years.
CSLB Licensed #1149766
Fully Insured
10+ Years Building in LA
Los Angeles · Huntington Park · Maywood · Bell · Cudahy · South Gate · Lynwood · Compton · East Los Angeles · Vernon · Downey · Inglewood · Hawthorne · Gardena · Long Beach · Torrance
What Los Angeles Homeowners Say About Constructora Carrillo
“We had a detached garage in [neighborhood, LA] that had been sitting empty for years. Pedro and his team converted it into a permitted one-bedroom ADU in about [X months]. The permit process went smoothly — no surprises — and the quality of the work was exactly what we were hoping for. We're now renting it out for [$X]/month, which covers a good chunk of our mortgage. We'd recommend Constructora Carrillo without hesitation.”
— A Los Angeles Homeowner [PLACEHOLDER]
“Desde la primera llamada, Pedro nos atendió en español y eso marcó la diferencia. Nos explicó cada paso del proceso con claridad, cumplió los tiempos que prometió, y el trabajo quedó tal como lo habíamos planeado. Es raro encontrar un contratista tan transparente. Muy recomendado.”
— Un propietario en Los Ángeles [PLACEHOLDER]
Testimonials pending client confirmation.
Frequently Asked Questions About ADU Construction in Los Angeles
How much does it cost to build an ADU in Los Angeles?
How long does it take to build an ADU in Los Angeles?
Do I need a permit to build an ADU in Los Angeles?
Can I build an ADU in my backyard in Los Angeles?
Is it worth building an ADU in Los Angeles?
Ready to Build Your ADU in Los Angeles? Let's Talk.
Spots fill up. We're currently scheduling estimates for Q2 2026 — if you're thinking about building this year, now is the right time to reach out and find out what's possible on your property.
Licensed General Contractor · CSLB #1149766 · Serving Los Angeles County