Services › Room Additions
Room Additions
Expand Your Living Space Without Moving
Need more space for your family? Oria Builders builds room additions that blend with your existing home — extra bedrooms, home offices, family rooms and more.
- 500+ projects completed across California
- 5-star ratings on Google, Yelp and Thumbtack
- Recognized by Houzz, HomeGuide and other platforms among California's top contractors
What We Offer
- Integration with the existing structure
- Custom architectural design
- Foundation and structural work
- Electrical and plumbing
- HVAC extension
- Interior and exterior finishing
- Permit handling and inspections
- Energy-efficient construction
Our Process
1. Site Assessment
We evaluate your property, existing structure, and local requirements.
2. Design & Permits
Plans that make the most of the space, plus all required permits.
3. Construction
Construction planned to limit disruption to your daily life.
4. Finishing Touches
Interior and exterior finishing to match your existing home.
Room Additions Questions, Answered
- How much does a room addition cost in Los Angeles?
In Los Angeles, a ground-floor room addition typically costs roughly $300 to $600 per square foot in 2026, so a 250 to 350 square foot bedroom or family room commonly lands between $80,000 and $180,000. Second-story additions usually run $400 to $800 per square foot because the existing foundation and framing have to be strengthened to carry the new load, and bathrooms and kitchens inside an addition push the per-foot cost up.
Service Regions
Los Angeles County • San Fernando Valley • Westside & South Bay • SF Bay Area & Silicon Valley. See completed projects or remodeling in Los Angeles.