Structural & MEP Design for ADUs and JADUs — Permit-Ready
Planning an Accessory Dwelling Unit (ADU) or JADU on your property? Our firm provides complete ADU Design & Engineering, including structural, mechanical, electrical, plumbing (MEP) plans and Title 24 compliance, to help homeowners, contractors, and developers obtain fast approvals anywhere in Southern California.
We deliver stamped engineering plans ready for submission to your city or county — designed for safety, code compliance, and cost-efficient construction.
Why Choose Our ADU Design & Engineering Service
- Full coordination of structural and MEP plans
- Experience with all city zoning requirements and plan-check workflows
- Residential-focused team with fast turnaround
- Budget-smart design that prevents costly changes during construction
- Support through the full permitting process
What Our ADU Plans Include
(Delivered as a complete permit plan set)
- Structural engineering plans
- Mechanical/HVAC design and load calculations
- Electrical design, panel and circuit updates
- Plumbing layouts, water/gas line sizing, drainage isometrics
- Title 24 energy calculations and documentation
- Engineering calculations stamped by a California licensed engineer
- Plan-check response and resubmittal support
Suitable for:
• Detached ADUs • Attached ADUs • Garage Conversions • Second-story ADUs • JADUs
Our ADU Plan Process
- Initial consultation and feasibility review
- Site visit and measurement of existing structure
- Engineering design: structural and MEP integration
- Title 24 energy modeling and compliance documentation
- Permit-ready drawing set issued
- Corrections and support until approved for construction
Turnaround: typically 4–12 weeks depending on complexity and city
Service Area — Entire Southern California
We provide ADU Permit Plans California to all major jurisdictions including:
- Los Angeles County (Los Angeles, Glendale, Pasadena, Santa Monica, Torrance, and more…)
- Orange County (Irvine, Anaheim, Costa Mesa, Huntington Beach, Fullerton, and more…)
- San Diego County (San Diego, Oceanside, Carlsbad, Encinitas, Vista, Escondido, San Marcos, Poway, LA Jolla, Del Mar, Rancho Santa Fe, and more…)
- Inland Empire (Riverside, Corona, Temecula, Murrieta, San Bernardino, Ontario, Rancho Cucamonga, and more…)
- Ventura County (Ventura, Oxnard, Thousand Oaks, Simi Valley, Camarillo, and more…)
We also cover unincorporated and coastal zone locations that require additional approvals.
Frequently Asked Questions
Yes. Cities require structural engineering and typically MEP plans for permit approval, along with Title 24 energy compliance.
Most projects are completed within 4–12 weeks, depending on the ADU size and whether existing plans are available.
Yes. We coordinate with architects and builders to ensure the ADU plans are practical, code-compliant, and aligned with the architectural design.
Yes. Plan-check response and revision support are included until permit approval.
Yes. We cover Los Angeles, Orange County, San Diego County, Inland Empire, and Ventura County.
Start Your ADU Plan Approval Process
Get expert guidance from a California-licensed engineering team that understands both ADU Design & Engineering requirements and ADU permit plans in Southern California.
Request a consultation today to review your property and receive a detailed proposal.