Room Additions · Los Angeles

Los Angeles
Room Additions
More Space. No Compromise.

Master suites, home offices, family room expansions, and second-story additions — 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.

Request Free Addition Estimate →
Room addition Los Angeles — Right Image Builders

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

Room addition Los Angeles — Right Image Builders
Home addition interior Los Angeles — Right Image Builders
Addition project Beverly Hills — Right Image Builders
View Full Portfolio →
0+
Years in Los Angeles
0★
Five-Star Reviews
Top 1%
CA Contractors
0+
Permitted Projects

How It Works

Three Steps.
Zero Surprises.

01

Free Site Consultation

Vladimir 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.

See Full Process →

Room Additions FAQ

Questions We
Hear Every Day

How much does a room addition cost in Los Angeles?+
A room addition in Los Angeles typically costs $250–$450+ per square foot depending on addition type, structural complexity, and finish level. A master suite addition of 400–600 sq ft runs $100,000–$200,000. A second-story addition costs more due to structural requirements — typically $350–$500 per square foot. Sunroom and enclosed patio additions run $200–$350 per square foot for fully permitted, conditioned space. We provide site-specific fixed-price estimates after a walkthrough.
Do I need permits for a room addition in Los Angeles?+
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.
How long does a room addition take in Los Angeles?+
A typical room addition in Los Angeles takes 6–10 months total from start of design to move-in. Design and structural engineering takes 4–8 weeks. LADBS plan check takes 4–8 weeks. Construction — foundation, framing, roofing, MEP rough-in, drywall, and finishes — takes 4–6 months after permit issuance. We issue a milestone schedule at the start of the engagement so you know what to expect at every phase.
What is the difference between a room addition and an ADU?+
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.
Can you add a second story to my existing Los Angeles home?+
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.

Request Free Estimate (888) 357-9992 →
📞 Call NowFree Estimate