Top-rated structural engineers.

Best structural engineers near Castaic, CA

Enter your zip and get matched with up to 5 pros

Need a pro for your structural engineering project in Castaic, CA?

Select your specific project to find the pro for you.

TRUSTED BY CASTAIC, CA HOMEOWNERS

  • Average homeowner rating star icon4.9
    Average homeowner rating
  • Verified reviews icon13
    Verified structural engineering services reviews

Top-Rated Structural engineers in Castaic - Updated Nov 2026

Avatar for Alpha Structural, Inc.
Alpha Structural, Inc.
4.6(
241
)
Engineer - Structural

Serving Castaic, CA and surrounding areas

Approved (Corporate)

In business since 1992

Free estimates

Emergency services offered

"Erinn was my initial contact and he gave a very through and fair estimate. We had structural work done to support floor joists and large beams under the garage that needed replacing. Ernesto and his team, Julio, Salvatore and Gilder worked tirelessly to complete the work and were respectful, punctual, informative and good humoured throughout the entire process. I would not hesitate to use them again or recommend them to others. A really great company!!"
Basement Addition
Basement Expansion
Caisson Supported Retaining Wall
Cantilevered Deck Design Build
Deck Expansion and Slope Failure with Retaining Wall

+323

Response time10 hrs
Response rate100%
11 neighbors recently requested a quote
Avatar for PETER T ERDELYI & ASSOCIATES INC
PETER T ERDELYI & ASSOCIATES INC
4.8(
12
)
Draftsperson/CADDArchitect

Serving Castaic, CA and surrounding areas

Approved

In business since 1976

Warranties offered

Credit card accepted

"The work Erdelyi associates did is great, but communication and timeliness were lacking. I didn’t have a consistent point of contact throughout the project - it just seems my project was handed off from one person to the next with no continuity and I had to proactively reach out for updates."
Beverly Hills
Pacific Palisades
Culver City
1 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for AAA Engineering Design
AAA Engineering Design
4.1(
9
)
Engineer - Structural

Serving Castaic, CA and surrounding areas

Approved

In business since 2003

Free estimates

Emergency services offered

With over two decades of experience, we provide structural engineering services for residential and commercial projects throughout California. We specialize in timber, steel, concrete, and CMU structural design for public and private sector developments. Our approach focuses on safety, constructability, cost efficiency, and full code compliance.\nOur experience includes shopping centers, office buildings, retail spaces, tenant improvements, industrial facilities, new homes, additions, remodels, ADUs, retaining walls, foundation systems, seismic retrofits, and structural upgrades. We work closely with owners, architects, contractors, and local agencies to deliver practical engineering solutions with fast turnaround times and reliable support from design through permitting and construction. Customer satisfaction, clear communication, and dependable service are the foundation of our business. Contact us today to discuss your project.

3 Story 4 Condos
3 Story 4 Condos
3 Story 4 Condos
3 Story 4 Condos
3 Story 4 Condos

+5

25 neighbors recently requested a quote
Recommended by66%of homeowners
AAA Engineering Design
4.1(
9
)
Engineer - Structural

Serving Castaic, CA and surrounding areas

Approved

In business since 2007

Free estimates

Small jobs welcome

"I had the pleasure of working with Aws on a recent project and was thoroughly impressed by his professionalism and efficiency. He delivered a clean, straightforward structural design that met all the necessary requirements without unnecessary complexity. Aws was fast, reliable, and highly communicative throughout the process, making coordination smooth and strass-free. On top of that, the pricing was very reasonable. I highly recommend Aws and his firm for any structural engineering needs. They offer a great combination of expertise, responsiveness, and value."
Foundation Plan
Roof Framing Plan
Response time3 hrs
Recommended by66%of homeowners
Avatar for Saylor Design Studio
Saylor Design Studio
5.0(
5
)
ArchitectDraftsperson/CADD

Serving Castaic, CA and surrounding areas

Approved

In business since 1990

Free estimates

Small jobs welcome

At Saylor Design Studio, I uphold a standard characterized by fairness, honesty, and accountability. My design approach involves working closely with clients to understand their unique needs, preferences, and lifestyle, ensuring that every design reflects their individuality. As a Custom Home Designer and a member of the American Institute of Building Design, I specialize in residential designs for additions, remodels, and new homes. I have over three decades of experience and have successfully designed over 700 projects. Additionally, I have an extensive background as a Set Designer and am a member of the Art Directors Guild and have completed over 70 film and television projects. My knowledge of construction methods, materials, and building codes allows me to provide accurate and detailed construction documents for contractors and consultants. This gives me a distinctive design perspective unmatched by others.

Custom Hillside Home - Front and Rear Elevations
Plans
Custom Hillside Home - Sections
Elevation
Framing Plans

+12

Response time8 hrs
Response rate92%
Recommended by100%of homeowners
CCD - Engineering and Design
3.4(
18
)
Engineer - Structural

Serving Castaic, CA and surrounding areas

Approved

In business since 1986

Free estimates

Offers commercial services

"I hired CCD to help me permit a structure that I built (Rooftop Deck) and then had a neighbor complain about, leading to lots of trouble and compliance issues. After getting some quotes (that were often 2-3 times what I ended up paying) I found CCD. Mike told me they have never failed to permit a single unpermitted structure... and 12 months later mine is another one of their success stories. I had them draw up the plans and the city approved his blueprints without a single correction which I understand is rare in Santa Monica. I am very satisfied with everything CCD did for me & would not hesitate to hire them again."
Response time2 days
6 neighbors recently requested a quote
Recommended by71%of homeowners
Avatar for Evolution Drafting
Evolution Drafting
3.7(
127
)
Draftsperson/CADDArchitectArchitect - For Business

Serving Castaic, CA and surrounding areas

Approved

In business since 2018

Free estimates

Emergency services offered

"They were excellent. They quickly made a draft that only needed 3 minor adjustments. The final product was exactly what I needed. They referred me to a structural engineer for review. The whole process took half of the time that they initially estimated. I would definitely use them again."
Zeal Floor Plan
Charcoal
Palm Floor Plan
Charcoal Floor 2
Charcoal Floor 1

+23

Response time1 day
Response rate100%
66 neighbors recently requested a quote
Avatar for CODAspaces
CODAspaces
5.0(
6
)
Architect - For BusinessDraftsperson/CADD

Serving Castaic, CA and surrounding areas

Approved

In business since 2007

Free estimates

Small jobs welcome

I am a licensed architect who has specialized experience with tenant improvement projects, particularly offices and restaurants. I have also designed residential projects, from ADUs and single family homes to multi-family. I have over 20 years experience and obtained my master's in architecture from Harvard.

Response time1 day
14 neighbors recently requested a quote
Recommended by66%of homeowners
Avatar for Ara Hovsepyan Architecture
Ara Hovsepyan Architecture
5.0(
3
)
ArchitectArchitect - For Business

Serving Castaic, CA and surrounding areas

Approved

In business since 2021

Offers commercial services

We specialize in architectural design and documentation for residential, mixed-use, and institutional projects. \nOur studio is led by a licensed architect with professional experience across projects of varying scale\nand complexity. \nClients work directly with the architect throughout the\nprocess, with a focus on clear communication, technical accuracy, and responsiveness.

Granada Hills House
Granada Hills House
Granada Hills House
Granada Hills House
Eagle Rock Addition

+10

Avatar for R Hanna Architects, Inc.
R Hanna Architects, Inc.
4.8(
3
)
Architect

Serving Castaic, CA and surrounding areas

Approved

In business since 2014

Free estimates

Offers commercial services

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumers' needs. It is our mission to provide excellent customer service from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a personal and professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

Front Elevation
Front Elevation
Rear Elevation
Rear Elevation
Office

+14

Response time4 hrs
Recommended by50%of homeowners
...
Showing 1-10 of 166
Structural Engineering FAQs, answered by experts

First, most contractors will have a structural engineer create a report and plan for your project to ensure it’s safe to cut into the load-bearing wall. The contractor will then excavate around the wall, if necessary, measure the opening—allowing for additional space to fit and level the door, and then cut the doorway out. They will likely install a steel lintel as a header over the door for support. Once the doorway is cut out, they’ll demolish the concrete using sledge hammers and masonry chisels, clean up the surrounding concrete, and seal around the door with masonry mortar. 

Absolutely, as it ensures designs are viable and won’t compromise structural integrity.

If you’re building new construction or adding onto your existing home, hiring a structural engineer is not only worth it but it’s probably required by your local building department. Structural engineers will ensure you aren’t making your home unsafe in the building process, which is crucial from a safety perspective but also a legal one. It’s also worth hiring a structural engineer if you’re making changes to structural components, like removing a load-bearing wall.

The standard thickness for an LVL beam is between 1.75 inches and 7 inches. However, you can order LVL beams in non-standard sizes as well. When you work with a contractor, they can source beams that are the appropriate size for your project for you after assessing your blueprints.

The depth of any foundation style depends on your climate and how deep the frost line is, as building code requires that the footers of a foundation—which are built into a monolithic slab—sit at least a foot below the frost line. At the southern tip of Florida, for example, a monolithic slab foundation would only need to sit 12 inches under the soil at the widest parts. On some parts of the Canadian border, the frost line is 100 inches, which would mean a minimum of 112 inches, which is prohibitively deep for a monolithic slab.

The Castaic, CA homeowners’ guide to structural engineering services

From average costs to expert advice, get all the answers you need to get your job done.