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Do I Need a Structural Engineer for My Remodel or Addition?

March 03, 20252 min read

If you're planning a home remodel or building an addition, you're probably juggling architects, contractors, designers — and wondering if you really need a structural engineer too.

Short answer? If you're modifying anything that affects the structure of your home — like walls, foundations, roofs, or adding square footage — yes, you do need one. And here's why.


🏗️ What Does a Structural Engineer Actually Do?

Structural engineers ensure that your remodel or addition is safe, code-compliant, and able to support the loads (weight, wind, seismic, etc.) it's designed for. They assess your existing structure and design or approve changes to key components like:

  • Load-bearing walls

  • Beams and headers

  • Foundation reinforcements

  • Roof modifications

  • Staircases or second-story additions

Without proper calculations and a stamped set of drawings, your project might hit major issues during city inspections — or worse, become a safety risk later.


🛠️ When You Definitely Need a Structural Engineer

You’ll want to bring one in if you’re:

  • Removing or altering load-bearing walls

  • Converting a garage or attic into livable space

  • Adding a second story or expanding outward

  • Making foundation modifications

  • Installing larger windows or doors (which affect shear strength)

  • Building an ADU or accessory dwelling unit

  • Dealing with cracks, settling, or structural damage


🧾 Will the City Require a Structural Engineer?

In most California cities, if your remodel touches any structural element, the building department will require stamped structural drawings as part of your permit set. If you submit plans without engineering, the city may reject them or ask for structural addendums later — delaying your project by weeks.


🤝 How SBKN Makes It Easy

At SBKN, we specialize in structural engineering for remodels, additions, and ADUs. We work directly with homeowners, contractors, and architects to:

  • Review existing structures

  • Design safe, code-compliant plans

  • Provide city-ready stamped drawings

  • Coordinate with building departments for fast approvals

We’re here to streamline your permit process, reduce costly change orders, and make sure your project is built on a solid foundation — literally.


💬 Thinking of Remodeling? Let’s Talk.

Before you open up walls or pour concrete, let’s make sure everything’s engineered right. Reach out for a free consultation or upload your existing plans to get started.

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What Our Clients Say About SBKN

George Owens

“Working with SBKN was a game-changer. Their team handled all the structural and permit requirements for our home addition flawlessly. What impressed us most was their responsiveness and attention to detail. Every question we had was answered quickly, and their coordination with the city helped us avoid delays. We felt confident every step of the way and couldn’t have asked for a smoother experience. I highly recommend SBKN to anyone looking for engineering support that’s professional, knowledgeable, and actually cares about the success of your project."

Kim Wexler

“We’ve worked with other firms before, but none compare to SBKN. They managed our commercial tenant improvement project with professionalism from start to finish. Their engineers delivered accurate, stamped drawings quickly, handled revisions without delay, and even worked directly with the city to push permits through faster than expected. Their clear communication and accountability helped us stay on track and under budget. We’ll definitely continue using SBKN for all our future builds and refer them to anyone in the industry.”

James Cart

“As a general contractor, I need reliable partners — and SBKN has been exactly that. They’ve helped us on multiple projects, from ADUs to full-scale remodels. Their structural and civil plans are always spot-on, and their ability to respond quickly to plan check comments saves us time and money. They understand the field, the permit process, and what it takes to get projects approved fast. I trust them completely and appreciate having a team that makes my job easier instead of harder.”

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