Your Trusted Structural Engineering Partner
Permit-ready structural plans for residential and commercial projects across Orange County.
Residential structural design • City-ready calculations • Fast turnaround • Clear scopes
1,000+ Residential Projects
California-Licensed Professional Engineers
Designed for City Approval
Serving OC & Southern California
1,000+ Structural Projects Delivered Across Southern California
We specialize exclusively in structural engineering, helping homeowners, contractors, and architects move projects from concept to permit approval with confidence.
Our work focuses on code-compliant, constructible designs that reduce plan check comments, minimize revisions, and keep projects moving.
From additions and ADUs to structural retrofits, we deliver structural plans built for real-world construction.
Structural Engineering Services
Residential Structural Design
Structural plans and calculations for:
- Home additions & remodels
- ADUs & JADUs
- Garage conversions
- Detached structures
- Load-bearing wall modifications
Structural Calculations & Analysis
- Gravity & lateral load calculations
- Seismic design (California-compliant)
- Shear walls & moment frames
- Foundation and framing analysis
Permit-Ready Structural Plans
- City submittal drawings
- Structural notes & details
- Plan check coordination support
- Revisions based on city comments (within scope)
Why Homeowners & Contractors Trust SBKN Engineering
Licensed Expertise
With licensed Professional Engineers on our team, every design we deliver meets the highest standards of safety, compliance, and precision. You can build with confidence knowing your plans are backed by credentials.
Code-Compliant & Permit-Ready
We know how to navigate California building codes, zoning rules, and permit requirements. Our drawings and plans are designed to get approved—fast—so your project doesn’t get stuck in red tape.
Reliable Timelines
Delays are costly. That’s why we commit to delivering plans and approvals on time, keeping your project moving forward without unnecessary setbacks.
Tailored Solutions
No two projects are alike. Whether it’s a simple garage conversion, a multi-unit ADU build, or a large commercial project, we customize our engineering services to match your goals, budget, and site conditions.
Local Structural Engineers Serving Orange County
We Serve Clients Throughout:
Irvine, Anaheim, Costa Mesa, Santa Ana, Huntington Beach, Newport Beach, Tustin, Orange, Mission Viejo, Laguna Beach, Fullerton, Yorba Linda, and surrounding areas.
What Your Plans Will Include
The Full SBKN Package
Licensed & Experienced – Backed by Professional Engineers licensed in California and Texas, ensuring safety and compliance on every project.
Permit-Ready Plans – Our designs are created to pass city reviews quickly, helping you avoid delays and extra costs.
Tailored to Your Needs – From ADUs and garage conversions to large commercial projects, we customize solutions for your specific goals.
Contractor & Homeowner Friendly – We bridge the gap between property owners and builders, delivering plans that are practical, accurate, and easy to execute.
What our clients say about us
“The structural plans were clear, thorough, and passed city review without issues. Exactly what we needed to keep the project moving.”
Emma W. | ADU
Orange, CA
“SBKN made the structural process simple. Fast turnaround, clear communication, and no surprises during plan check.”
Mark T. | ADU
Santa Monica, CA
“We’ve worked with several engineers—SBKN stands out. Their structural designs are practical and permit-ready.”
Sarah D. | Garage Conversion
Yorba Linda, CA
“From concept to approved structural plans, the experience was smooth and professional. Highly recommend their team.”
David S. | Single Family Home
San Bernardino, CA
“The structural calculations were clean and easy for our contractor to build from. Saved us time in the field.”
Oliver G. | Room Addition
Murrieta, CA
“SBKN understands how cities review plans. Their structural work helped us avoid revisions and delays.”
Sameer B. | Commercial
Roseville, CA
“Managing structural requirements used to be stressful. SBKN made the process straightforward and efficient.”
Lisa R. | ADU
Oakland, CA
“Great communication and solid engineering. SBKN was responsive and easy to work with from start to finish.”
Rachel P.
Ladera Ranch, CA
“Their team delivered exactly what was promised—clear scope, strong structural design, and fast turnaround.”
Tom F. | Commercial
San Marino, CA
Frequently Asked Questions
Are your plans ready for city submission?
Yes. Our deliverables are prepared specifically for permit approval.
Do you assist with plan check comments?
Yes, within the original project scope.
How long does structural design usually take?
Most residential structural projects are completed within 1–3 weeks, depending on project complexity, responsiveness, and city requirements.
Do you provide stamped calculations and drawings?
Yes. All structural drawings and calculations are prepared and stamped by licensed California Professional Engineers, when required.
Who do you work with?
Homeowners, contractors, commercial owners, property management companies and architects.
What areas do you serve?
Orange County and projects throughout California.
What’s the first step to get started?
Submit a Structural Project Review request through our form. We’ll review your information and reach out with next steps.
Do you only provide structural engineering?
Structural engineering is our core specialty. We are also highly experienced in architectural design, MEP engineering, Title 24 energy compliance, and permit coordination, allowing us to deliver fully coordinated, permit-ready design packages for residential and light commercial projects.
What if I don’t have architectural plans yet?
That’s okay. We can review your concept, advise on feasibility, and coordinate architectural services if needed to help move the project forward.
Let’s Turn Your Project Into Permit-Ready Structural Plans
Tell us a bit about your project and we’ll confirm scope, feasibility, and next steps.
Clear guidance. No pressure. No obligation.
