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
- Room addition cost santa monica?
In 2026, a room addition in Santa Monica typically costs about $350 to $700+ per square foot, and many projects land around $150,000 to $400,000 or more. Ground-floor bedroom or family room additions usually cost less than second-story additions, while bathroom plumbing, structural changes, finish level, and Santa Monica permit requirements can push the total higher. - 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. - What to consider before adding a second story to your home in pasadena?
In Pasadena in 2026, a second-story addition often costs about $350 to $650+ per square foot, and many projects take roughly 8 to 16 months from initial plans to final sign-off. The biggest things to check before moving forward are whether the existing foundation and first-floor walls can carry a new level, whether Pasadena planning or historic review will add time, and whether your budget includes stairs, HVAC, roofing, and possible temporary housing.
Service Regions
Los Angeles County • San Fernando Valley • Westside & South Bay • SF Bay Area & Silicon Valley. See completed projects, remodeling in Los Angeles or every city we serve.