We are your structural engineer!

Nirattisai Structural Engineering, Inc. serves the Santa Clarita Valley and beyond.

Consulting with a structural engineer doesn’t have to be complicated

We work with homeowners, architects, contractors, interior designers, landscape designers, building officials, realtors, and more.

Over 10 years of experience​

Serving Southern California, and beyond!

With over 1000 projects completed all over the state of California, we’ve helped home owners with new construction and remodel, business owners with tenant improvement, building owners with retrofits, and so much more. We are fully licensed and insured in the state of California.

Some of our services…


New construction, remodel and renovation, ADU, custom home, retrofit


New construction,
tenant improvement

Engineer’s Assessment​

Bearing wall removal, foundation, whole house or local damage assessment

Outdoor Living

Attached deck, California room, patio cover, pergola, open trellis

Site Structure

Retaining wall,
water feature

Free Consultation​

Let us know about your needs and we can help figure out your next steps

Preston Nirattisai, Registered Professional Engineer in the State of California

Look at a list of Preston’s role models, and you’ll find one thing in common: they have a serious commitment to quality. Not just “Is it okay?”, but “Is every detail where it should be?” Preston’s ultimate professional goal is to bring that commitment to every one of his engineering projects. That’s why he started his own company, so that he would be the one to set the high standards.

At age 11, Preston made the big move from Thailand to the United States, where his family settled right here in the Santa Clarita Valley. He played the saxophone in his high school’s marching band (go Cowboys!). He then earned both his Bachelor’s in civil engineering and Master’s in structural engineering from CSU Northridge.

Today you will find Preston living in Santa Clarita, near his family and his in-laws, with his wife Lynne. They have two sons and a daughter. After his family, Preston’s next loves are sailing, good barbecue, and building wooden boats.

Get in touch with a structural engineer

Whether you already have a project in mind, just need an engineer’s opinion, or even if you’re not sure you need a structural engineer, you can get in touch with Preston by calling, texting, or using the form on the right and let him know about your needs. Most queries are answered within 24 hours.

    Nirattisai Structural Engineering, Inc.
    Santa Clarita, CA 91350
    (818) 639-1760