Updated: December 2025
*AAA Engineering Design: California PE Licensed | 20+ Years Experience | 500+ Projects | Free Consultations*
Searching for an ADU structural engineer near you in Torrance? Our licensed Professional Engineers specialize in accessory dwelling unit structural design including garage conversions, detached ADUs, and attached additions. We understand Torrance's ADU requirements and deliver permit-ready structural plans.
Why Torrance ADU Projects Need Local Structural Engineers
Torrance has embraced California's ADU legislation, but successful ADU projects require structural engineering that meets both state requirements and local expectations. A local ADU engineer understands Torrance's specific processes and common approval pathways.
**Benefits of Local ADU Expertise:**
- Knowledge of Torrance Development Services Department requirements
- Experience with Torrance's common lot configurations
- Understanding of South Bay construction practices
- Familiarity with typical ADU permit timelines
- Relationships with local ADU contractors
Our ADU structural engineering team serves Torrance, Redondo Beach, Gardena, and the South Bay.
What ADU Types Do We Engineer in Torrance?
**Garage Conversion ADUs** Converting existing garages to living space is the most cost-effective ADU approach. Structural engineering addresses foundation upgrades, wall modifications, and ceiling height requirements.
**Detached ADUs** New stand-alone ADU buildings require complete structural engineering including foundation design, framing, and connection details.
**Attached ADUs** ADUs attached to existing homes require structural analysis of connections and load paths to the main house.
**Two-Story ADUs** Maximizing smaller lots with two-story ADUs requires efficient structural design for both living space and parking below.
**Junior ADUs (JADUs)** Converting existing living space within homes to independent units may require structural modifications for separate entrances and code compliance.
How Much Does ADU Structural Engineering Cost in Torrance?
ADU structural engineering in Torrance typically ranges from $3,000 to $8,000 depending on ADU type and complexity.
**Typical ADU Engineering Costs:**
- Garage conversion: $3,000-$5,000
- Detached ADU (single story): $4,000-$6,000
- Detached ADU (two story): $5,000-$7,500
- Attached ADU: $3,500-$5,500
- JADU: $2,000-$3,500
Torrance ADU Requirements Overview
**Key Torrance ADU Rules:**
- Maximum ADU size: 1,200 sq ft (detached) or 50% of main house (attached)
- Minimum lot size: None required for most ADUs
- Setbacks: 4 feet from rear and side property lines
- Height limit: 16 feet (single story) or higher for two-story under certain conditions
- Parking: Generally not required for ADUs
Our engineers design ADUs meeting all Torrance requirements while maximizing allowable space.
ADU Structural Engineering Process
**Phase 1: Site Assessment (1 Week)**
- Evaluate existing conditions (for conversions)
- Review architectural plans
- Identify structural requirements
- Develop engineering approach
**Phase 2: Structural Design (1-2 Weeks)**
- Foundation design
- Wall and roof framing
- Connection details
- Coordination with other trades
**Phase 3: Permit Documents (1 Week)**
- PE-stamped structural plans
- Calculation package if required
- Coordination with architect
Why Choose AAA Engineering Design for ADUs in Torrance?
AAA Engineering Design provides California PE-licensed structural engineering with extensive ADU experience. We deliver practical, permit-ready structural plans that help your ADU project move forward efficiently.
**Our Torrance ADU Service Area:**
- Torrance (all areas)
- Redondo Beach
- Gardena
- Carson
- Lomita
- Palos Verdes
Contact Us
Ready to build your Torrance ADU? Our licensed Professional Engineers deliver permit-ready structural plans.
**Call Now: (949) 981-4448** - Free consultation, no obligation
[Get Your Free Consultation →](/contact)
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Frequently Asked Questions
**How long does ADU structural engineering take in Torrance?** Most ADU structural engineering takes 2-3 weeks from initial information to permit-ready documents. Garage conversions may be faster; complex two-story ADUs may take longer.
**Do I need a structural engineer for a garage conversion ADU?** Yes, Torrance requires PE-stamped structural plans for garage conversions. Engineering addresses foundation upgrades, wall modifications, and new openings for windows and doors.
**Can a structural engineer help with ADU permit approval?** Structural engineers provide required PE-stamped plans. We also respond to plan check comments from Torrance Development Services, helping resolve structural questions that arise during permit review.