# Room Additions & Second Stories in Los Angeles

1 Smart Build handles room additions & second stories projects end-to-end across Los Angeles County: design, structural engineering coordination, city permitting and construction with our own licensed crews. Rear, side and second-story additions, primary suite additions and kitchen bump-outs, including structural engineering, foundation and framing reinforcement, roof tie-ins and Title 24 compliance.

## Cost and timeline

- Typical cost: $250–$500+ per sq ft
- Typical timeline: 6–12 months including design and permitting
- Service area: Los Angeles County and the San Fernando Valley

These are planning ranges based on completed projects, not quotes. Every project receives a fixed-price proposal with written specifications after a site visit.

## What is included

- Free consultation and site review
- Architectural design and engineering coordination
- Los Angeles permitting and plan check management
- Construction with milestone inspections
- Fixed-price proposal and written warranty

## Related pages

- [All services](https://1smart.build/services)
- [Remodeling costs](https://1smart.build/remodeling-cost-los-angeles)
- [Case studies](https://1smart.build/projects)

## Company facts

- Business: 1 Smart Build, design-build general contractor
- Phone: 1 (866) 419-8840
- Email: info@1smart.build
- Office: 21243 Ventura Blvd #133, Woodland Hills, CA 91364
- License: California CSLB #1076428 (Class B, General Building Contractor)
- Insurance & bond: $1,000,000 liability policy, $15,000 contractor bond
- Reviews: 4.9 stars on Google (168 reviews)
- Ownership: Veteran-owned and women-owned
- Service area: Los Angeles County and the San Fernando Valley

Canonical HTML version: https://1smart.build/services/room-addition
Site index for agents: https://1smart.build/llms.txt