Guillen Construction is a family-owned general contractor serving the San Fernando Valley, Greater Los Angeles, and Orange County — from kitchen remodels and backyard ADUs to ground-up new construction.
Most "general" contractors are schedulers for other people's subcontractors. We build with our own crews across the trades that decide a project — concrete, framing, drywall, plumbing, electrical, stucco — so the schedule is ours to keep and the quality is ours to answer for.
Fewer handoffs. Fewer surprises. One phone number that picks up, in English or Spanish, before and after the check clears.
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Kitchens, bathrooms, whole-home remodels, and room or second-story additions — designed, permitted, and built by one team.
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Backyard homes, garage conversions, and guest houses — plans, permits, and construction, with rental income at the end of it.
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Ground-up homes, duplexes, and light commercial buildings — from grading and foundations to keys.
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Driveways, foundations, retaining walls, stamped finishes, patios, and decks — poured and finished by our own crews.
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Additions, ADU and garage shells, structural repairs, and full new-construction framing — fast, square, and inspected.
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New hangs, patches, water-damage repair, and texture matching so good you can't find the seam.
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Repipes, water heaters, panel upgrades, rewires, and EV chargers — permitted, inspected, and patched afterward.
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Three-coat stucco, re-stucco, crack repair, and fiber-cement siding — weather-tight and clean-lined.
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Tenant improvements, unit turns, SB 721 balcony repairs, and maintenance programs for property managers and owners.
Learn more →Los Angeles needs housing and your lot probably qualifies to add some. We design, permit, and build ADUs and garage conversions across LA and Orange County — units that house family or produce income for decades.
We meet at your property, listen, measure, and give you straight answers — including the ones you didn't ask for. Estimates are free.
A written, line-item scope with a milestone payment schedule that follows California law. Plans, engineering, and permits handled.
Our own crews, a clean site, and a schedule we actually keep. You get one point of contact and updates you don't have to chase.
We punch the list to zero, pass final inspection, and stand behind the work after the trucks leave.
Mission Hills · San Fernando · Sylmar · Granada Hills · Northridge …
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Inglewood · Hawthorne · Gardena · Compton · Watts …
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Koreatown · Mid-City · Mid-Wilshire · Pico-Union · Westlake …
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Anaheim · Santa Ana · Fullerton · Orange · Garden Grove …
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Guillen Construction is a family business based in Mission Hills, in the San Fernando Valley. When you call, you talk to the people who will actually build your project — in English or in Spanish — not a sales rep working a script.
We're licensed, bonded, and insured, and we've built our name the slow way: showing up, telling the truth about price and schedule, and leaving job sites cleaner than we found them. Your home is your family's biggest investment. Ours is our name.
★★★★★ 5.0 on Google
“We'd had a flat roof replaced by a supposed “expert,” only to have persistent leaks and water damage. Rocky's team re-roofed, and it was like they turned off a faucet — just in time for the heaviest rains of the season. My wife and I have been sleeping a lot better since we met Rocky and his team.”
Steven C.
Homeowner — roof & repairs
“As a property manager overseeing multifamily properties… they provide fair and reasonable pricing, listen to my concerns, communicate clearly, and consistently stick to their timelines. They're responsive, easy to reach, and always answer when I call. I highly recommend them to any property owner or manager.”
Cesar P.
Property manager — unit turns & maintenance
“They completely re-did the exterior of my home… my house looks brand new! Rocky, Paco, and their crew also saved the day on a kitchen remodel another contractor left unfinished. Everyone at Guillen Construction is incredibly professional, helpful, and thorough.”
Iman W.
Homeowner — exterior & kitchen
Garage conversion or backyard build? Here are the real turnkey numbers we quote in 2026 — construction, soft costs, and the rent math that makes them work.
Read the guide →The three real price tiers for LA kitchens in 2026, the line items inside them, and the two places homeowners waste money.
Read the guide →What needs a permit, what doesn't, and why the cheapest bid on your street is usually the most expensive thing a homeowner can buy.
Read the guide →Free on-site estimates. Straight answers on price, permits, and timeline — no runaround.
We reply within one business day — usually faster.