Room Addition & Home Extension Services in Los Angeles
More Space for Your Family — Without the Stress of Moving
Your family is growing, but your home isn't. Moving means disruption, sky-high costs, and leaving the neighborhood you love. A professionally built room addition gives you the space you need — right where you already belong.
What Is a Room Addition?
A room addition is a new construction attached to your existing home — expanding your square footage without requiring you to move. It can be a single room (bedroom, office, family room), a master suite, a second story, or a full side extension. Done right, it looks and feels like it was always part of the original design.
Room additions in Los Angeles require city or county building permits and must meet all structural and energy code requirements. At Constructora Carrillo, we manage every step — from permits to final inspection — so your addition is legal, safe, and built to last.
Why Choose Constructora Carrillo for Your Room Addition?
CSLB Licensed #1149766 — legally compliant room additions that pass all inspections
15+ years building additions across LA County — we know the permit process inside and out
Additions designed to match your existing home's style, roofline, and materials
Transparent pricing and written estimates before any work begins
Minimal disruption to your daily life during construction
English and Spanish-speaking team — we communicate the way you're comfortable with
Types of Room Additions We Build
Master Suite Addition
Add a private master bedroom and en-suite bathroom — a sanctuary within your own home. We design these additions to feel like a natural, luxurious extension of your existing space.
Family Room or Living Room Addition
Create the gathering space your family has outgrown. Whether it's a dedicated playroom, a larger family room, or an open-plan living extension, we make it happen.
Second Story Addition
When your lot doesn't have the space to expand outward, going up is the answer. Constructora Carrillo builds second-story additions on qualifying structures — maximizing square footage without touching your yard.
Home Office Addition
Remote work isn't going away. A dedicated home office addition gives you the professional space you need — quiet, private, and separate from the rest of the house.
Our Room Addition Process
Free Site Visit & Consultation
Pedro visits your property to assess the existing structure, discuss your goals, and give you an honest assessment of what's possible within your budget.
Design & Engineering Plans
We develop architectural and structural plans that match your existing home's design and meet all LA building code requirements.
Permit Submission & Approval
We file your permit application with the city or county and manage the entire approval process — including any plan check revisions.
Construction & Final Inspection
Our crew builds your addition with the care and precision your home deserves. We schedule and pass all required inspections before delivering the finished space to you.
Room Addition FAQs
Yes. Any structural addition to a home in LA City or LA County requires building permits. Unpermitted additions create serious problems when selling your home and can be ordered demolished. Constructora Carrillo handles all permitting as part of every project.
Room additions in LA typically range from $150 to $300+ per square foot depending on complexity, materials, and whether structural modifications to the existing home are needed. Pedro provides a detailed, written estimate after assessing your property — so there are no surprises.
A standard room addition takes 3 to 6 months from permit approval to completion. Permitting itself can add 2–4 months depending on the city. Pedro will give you a realistic timeline at your free consultation.
That's a priority for us. We source matching materials, match the roofline, and ensure the exterior finish complements your existing home — so the addition looks intentional, not tacked on.
Ready to Add the Space Your Family Needs?
Stop squeezing into a home that's too small. Let's design an addition that fits your family's life — and your budget. Call Pedro today.
Free estimates. No obligation. Serving all of Los Angeles County.