# SB9 Lot Splits & Two-Unit Development in Los Angeles

1 Smart Build handles sb9 lot splits & two-unit development projects end-to-end across Los Angeles County: design, structural engineering coordination, city permitting and construction with our own licensed crews. Urban lot splits, two-unit developments and new duplexes, including eligibility review for zoning, parcel size, hazard zones, historic districts and rental history, plus parcel maps and utility separation.

## Cost and timeline

- Typical cost: Varies by parcel, unit count and site work
- Typical timeline: 12–24 months including entitlement 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/sb9-lot-split
Site index for agents: https://1smart.build/llms.txt