Room Additions · Los Angeles

Room Addition
Contractor in Los Angeles

More space, no compromise — master suites, home offices, family room expansions and second-story additions across Greater Los Angeles, engineered, permitted and built by one team.

The Right Image Approach

Space You Design,
Built to Code

Los Angeles homeowners face a choice that doesn't exist in most other markets: the homes they love in the neighborhoods they want are often undersized for the way they actually live. Moving means competing in one of the country's most expensive real estate markets. Staying means figuring out how to make the space work. A room addition is how you stay — and get the space you actually need.

A room addition isn't a simple project. It requires a new foundation or foundation extension, structural framing that integrates with the existing building, a new roof section that matches or transitions from the existing, exterior finish that blends with the current facade, and all new MEP (mechanical, electrical, plumbing) extended from the main systems. It requires a building permit with structural engineering drawings. It requires inspections at every phase. Done wrong, it creates a structure that doesn't match the house, leaks at the connection point, and flags immediately on a home inspection when you sell.

Right Image Builders manages room additions from site assessment through Certificate of Occupancy. We coordinate licensed structural engineering drawings, handle all permit submittals and plan check responses with LADBS or your city's building department, build the addition with our in-house crew, and match the exterior finish to your existing home. The result is an addition that looks like it was always there — not an addition that looks like a box attached to the back of the house.

We work across all addition types: master suite additions with ensuite bathrooms, home office additions with dedicated exterior access, family room and great room expansions, second-story additions, sunrooms and enclosed patio additions, and in-law suite additions for multi-generational households. Each type has different structural requirements, setback implications, and zoning considerations in Los Angeles. We assess all of it at the site visit before you commit to anything.

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Open-plan living and dining space with vaulted ceiling and city view
Addition project · Los Angeles, CA
Addition Types We Build

Six Types of Additions,
All Under One Contract

01

Master Suite Additions

Dedicated master bedroom and ensuite bathroom addition — the most-requested addition type in Greater LA. Includes new foundation extension, framing, roof, exterior matching, and all interior finishes: custom tile bathroom, walk-in closet, hardwood or engineered flooring, trim and paint. MEP extended from the main home's systems with dedicated circuits for the new bath. Typically 300–600 sq ft.

02

Home Office Additions

A dedicated workspace addition designed for remote work, client meetings, or professional practice — built outside the main living area noise envelope. Options include a separate exterior entrance for clients, mini-split HVAC for independent climate control, structured data wiring (Cat 6A, fiber pre-wire), and sound-insulated walls. Built as conditioned square footage — fully integrated with the home, not a converted shed.

03

Family Room & Great Room Expansions

Expanding the existing footprint to create an open great room — extending the rear of the home or converting a covered patio into conditioned space. Includes structural beam work where existing walls are removed, new roof framing, vaulted ceiling option, large-format sliding or bifold door systems (Fleetwood, NanaWall, LaCantina) to connect indoor and outdoor living, and all interior finishes to match or contrast the existing home.

04

Second-Story Additions

Adding a complete second floor — or a partial second-story addition above an existing single-story portion — requires the most engineering of any addition type. We coordinate structural assessment of the existing first-floor framing and foundation, engineering design for the new floor system and lateral bracing, new roof structure, and stair integration into the existing floor plan. Second-story additions in LA also require Title 24 energy compliance and fire-rated floor-ceiling assemblies. Full scope, one contract.

05

Sunroom & Covered Patio Enclosures

Converting a covered patio or building a new sunroom addition — permitted conditioned space with full insulation, drywall, electrical, and HVAC. Aluminum or wood frame construction with insulated glass, operable windows, and optional sliding or bifold door systems. Not a prefab kit — a fully permitted, architecturally integrated addition that adds genuine square footage to your home and genuine value on appraisal.

06

In-Law Suite & Multi-Generational Additions

A private suite for extended family — bedroom, full bathroom, separate living area, and kitchenette rough-in. Designed with a separate exterior entrance for privacy while staying connected to the main home. Compliant with LA County zoning for accessory living areas (distinct from an ADU — this is an addition to the primary structure, not a separate unit). Acoustic insulation between the suite and the main home is standard on every build.

Recent Projects
How It Works

Three Steps.
Zero Surprises.

01

Free Site Consultation

A senior member of our team walks the property, assesses the existing structure, reviews setbacks and zoning allowances, and gives you an honest scope and cost range before any design work begins.

02

Design, Permit & Fixed Price

We coordinate architectural and structural drawings, submit for permit, and deliver a fixed-price construction contract before breaking ground. No open-ended T&M on an addition.

03

Build & Deliver

One crew builds your addition from foundation to final paint. We hand you a seamlessly integrated addition with a closed permit — not an afterthought box attached to the back of your house.

Room Additions FAQ

Questions We
Hear Every Day

For planning across Los Angeles, smaller additions and bump-outs typically begin around $60,000–$80,000 or more, full room and primary-suite additions commonly run about $120,000–$300,000 or more, and major second-story projects about $250,000–$550,000 or more, depending on city, size, foundation and structural scope, hillside conditions, plumbing moves and finishes. Each city page publishes its own local planning range. These are planning ranges, not quotes; the fixed-price proposal follows the free site consultation.
Yes. A room addition is new construction and requires a full building permit with structural engineering drawings, foundation details, MEP plans, and Title 24 energy calculations. Inspections are required at each phase — foundation, framing, rough MEP, insulation, and final. Right Image Builders handles all of this — permit submission, plan check responses, and all inspection scheduling. You never visit a permit office.
Plan on a few months of design, structural engineering and plan check before construction, then roughly three to six months of building for a ground-floor addition and longer for a second story. Hillside parcels and separate city jurisdictions such as Burbank can extend plan check. We give you one combined design-permit-build schedule in the fixed-price proposal rather than an optimistic guess.
A room addition expands the primary residence — it becomes part of the main home, shares utilities, and adds to the home's square footage and assessed value. An ADU (Accessory Dwelling Unit) is a legally separate residential unit with its own kitchen, bathroom, and the ability to be rented independently. An addition makes your home larger. An ADU creates a separate legal unit that can generate rental income. The permits, zoning rules, setback requirements, and financing implications are different for each.
In most cases, yes. A second-story addition requires a licensed structural engineer to assess the existing first-floor framing, foundation, and soil conditions to determine if they can support the new floor load. If upgrades are needed — new foundation elements, beam or post additions, shear wall upgrades — we include them in the contract. Title 24 energy compliance, fire-rated floor-ceiling assemblies, and egress windows in all bedrooms are required. We coordinate all engineering and permitting under one fixed-price contract.
"

We had a tiny living room that opened onto a covered patio we never really used. Right Image Builders designed and built a full family room addition in its place — 400 square feet, vaulted ceiling, skylights, and bifold doors to the garden. It completely changed how we live in this house. You can't tell it's an addition — it looks like it was always there.

Patricia & James W.
Family Room Addition · Studio City, CA · Google Review ★★★★★
Your Addition, Next

Let's Add the Space
You've Been Wanting

Free on-site consultation. Engineering and permits coordinated. Fixed-price construction contract before ground breaks.

Timeline

How Long a Los Angeles
Room Addition Takes

Across Greater Los Angeles a room addition typically needs a few months of design, structural engineering and plan check before construction, then roughly three to six months of building for a ground-floor addition and longer for a second story. Hillside parcels, separate city jurisdictions and premium finishes extend the schedule; the fixed-price proposal shows realistic dates for your project.

Before You Sign With Anyone

Choosing a Room Addition
Contractor in Los Angeles

Check the license at cslb.ca.gov — ours is 1021284 — for active status, the right classification, a bond and workers' compensation. Get insurance certificates in writing. Confirm the contractor is responsible for the architect, the structural engineer and the permit in the correct jurisdiction, and that the contract is written, fixed-price and itemized, with allowances, written change orders and progress payments tied to completed work; California caps the down payment at $1,000 or 10 percent, whichever is less. Then ask how the new structure will be tied into the old one. Each city page below adds the local question that matters there.

Where Your Permit Is Reviewed

Where Your Room Addition
Permit Is Reviewed

Los Angeles is not one building department. Most of the Valley communities we serve are inside the City of Los Angeles and permit through LADBS; Burbank is its own city with its own Building & Safety Division; and Toluca Lake straddles the two. The jurisdiction sets the plan-check process, the fees, the hillside rules and the inspection calendar, so it is the first thing we confirm for your address.

Hillside Area parcels inside the City of Los Angeles are reviewed under the Baseline Hillside Ordinance, and additions on Burbank's R-1 Hillside parcels can require a Hillside Development Permit. Neither applies to every property; we check the designation for your specific parcel before design.

Free Estimate

Let’s Talk About
Your Project

Tell us what you are planning and a senior member of our team will get back to you within 4 business hours with next steps. No obligation, no sales pressure.

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