Room Addition Contractor Los Angeles

Room Addition Services in Los Angeles by APLA Construction

Whether you need more space for a growing family, a home office, or an in-law suite, APLA Construction delivers expertly built room additions in Los Angeles that seamlessly integrate with your existing home. As a licensed California general contractor (#1136359), we handle every phase from design through final inspection. Learn more about our addition services.

Types of Room Additions We Build in Los Angeles

Bedroom additions — add a master suite, guest room, or children’s room
Bathroom additions — en-suite bathrooms, powder rooms, full baths
Second story additions — maximize your lot by building up
Family room and living space additions
Home office additions — dedicated workspace separate from living areas
In-law suite / granny flat additions — attached living quarters
Garage conversions — convert to living space or ADU

Room Addition Costs in Los Angeles (2025)

Single room addition (200–400 sq ft): $80,000 – $150,000
Master suite addition: $120,000 – $220,000
Second story addition: $200,000 – $450,000+
Bathroom addition: $60,000 – $120,000

Costs vary based on structural requirements, finish level, and permit complexity in your jurisdiction. APLA provides detailed, itemized estimates at no charge.

Frequently Asked Questions — Room Addition Los Angeles

Do I need a permit for a room addition in Los Angeles?

Yes. All room additions in Los Angeles require building permits from the LA Department of Building and Safety (LADBS) or your local city building department. APLA manages the entire permit process for you.

How long does a room addition take in Los Angeles?

A standard single room addition takes 3–6 months from permit approval to completion. A second story addition can take 6–12 months depending on structural complexity and permitting timelines.

Will a room addition increase my home’s value in Los Angeles?

Yes. In the Los Angeles real estate market, added square footage typically returns 50–80% of construction cost in home value. Additions that add bedrooms or bathrooms often yield the highest returns.

Can I build an addition without affecting my existing home’s look?

APLA designs additions to match your home’s existing architecture, roofline, and exterior finishes so the addition looks like it was always part of the original structure.

Get a Free Room Addition Estimate

Phone: (818) 818-4419
Email: info@aplaconstruction.com
License: CA #1136359

Serving all of Greater Los Angeles — San Fernando Valley, Westside, South Bay, Pasadena, and beyond.

Room Addition Contractor Los Angeles — Complete Guide & Costs