Room Additions in Los Angeles
Adding space to your home is often smarter than moving — especially in today's LA real estate market. We build additions that integrate seamlessly with your existing structure and match your home's existing character.
What We Build
Additions Built to Code, Built to Last
Room additions in Los Angeles involve structural engineering, city permits, foundation work, and finish trades — all in the right sequence. We've built master suites, home offices, ADUs, in-law quarters, and expanded living areas across the Valley and LA County.
Our team handles every phase, from the initial survey through final inspection. You get a realistic timeline, transparent pricing, and a finished addition that looks like it was always there.
- Master Suites
- Bedroom Additions
- Home Offices
- In-Law Quarters
- ADU / Guest Houses
- Family Rooms
- Garage Conversions
- Second Story Additions
Room Addition FAQs
What permits are needed for a room addition in Los Angeles?
Room additions require building permits from your local building department (LADBS for unincorporated LA County or your city's department). Permits cover structural, electrical, mechanical, and plumbing work. We manage the entire permitting process for you.
How long does a room addition take?
A standard room addition — new bedroom, home office, or expanded living area — typically takes 3–5 months from permit approval to completion. Larger additions or ADUs may run 5–8 months.
What's the difference between an ADU and a room addition?
A room addition expands your existing home's footprint and is attached to the main structure. An ADU (Accessory Dwelling Unit) is a separate or semi-separate living unit on the same property that has its own entrance and kitchen. Both require permits; ADUs have their own specific regulations in California.
How much does a room addition cost in the San Fernando Valley?
Room addition costs in the Valley typically run $200–$400 per square foot for standard construction. A 400 sq ft addition might range from $80,000–$160,000 depending on finishes, structural complexity, and permit fees.
Ready to Start Your Project?
Every project begins with a conversation. Tell us what you have in mind and we'll put together a detailed, no-obligation estimate.