Design, Engineer, and Build Your ADU with Confidence

Accessory Dwelling Units are growing in popularity across California—but every successful build starts with a solid structural foundation. At JN Structural Engineering, our licensed engineers handle every aspect of your ADU’s design and load calculations so your project moves smoothly through plan check and construction.

From new detached units to garage conversions, we provide stamped drawings and coordination with architects and builders to deliver safe, efficient designs that maximize space and comply with all city requirements.

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Key Benefits

  • Licensed Structural Engineers (PE)
  • Complete foundation and framing design
  • Load calculations & shear wall analysis
  • Fast turnaround for permit submittal
  • Coordination with architects and builders
  • Stamped drawings for city approval

Our engineers create cost-efficient designs that balance strength, safety, and sustainability. We help you avoid common permit delays by ensuring every structural component meets city standards the first time.

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Our Process

What to Expect from Our ADU Engineering Services

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Consultation & Assessment

We review your property, layout, and project goals.

Structural Design & Calculations

Our engineers produce PE-stamped plans for submittal.

City Review & Support

We coordinate directly with your architect or builder during approval.

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We believe that structural engineering is an art created by engineering professionals to bring architectural dreams and philosophies into a constructible form, fulfilling a client’s needs in the most economical way, working with the boundaries of codes and regulations.

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