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TRUSTED BY SOUTH PASADENA, CA HOMEOWNERS

  • Average homeowner rating star icon4.3
    Average homeowner rating
  • Verified reviews icon24
    Verified structural engineering services reviews

Top-Rated Structural engineers in South Pasadena - Updated Nov 2026

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

Serving South Pasadena, 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 Level Engineering Los Angeles, CA (Downtown)
Level Engineering Los Angeles, CA (Downtown)
4.4(
293
)
Engineer - Structural

Serving South Pasadena, CA and surrounding areas

Approved

In business since 2015

Credit card accepted

Offers commercial services

"Level Engineering provides professional and upfront services that has really added value to my business. The engineers are knowledgeable, friendly and proficient. I recommend that all my homeowners use their services prior to any structural work knowing that they will provide quality information that they will stand behind."
Recommended by93%of homeowners
Avatar for PETER T ERDELYI & ASSOCIATES INC
PETER T ERDELYI & ASSOCIATES INC
4.8(
12
)
Draftsperson/CADDArchitect

Serving South Pasadena, CA and surrounding areas

Approved

In business since 1976

Warranties offered

Credit card accepted

"The project went great. Peter is very professional, super knowledgeable, responsive and timely. The plans were done on time and there were no problems with the city review. They answered the questions the contractor had during the construction. Couldn't be happier with the whole process. I thought it would be more difficult than it was. Thanks to Peter and his team we feel very safe with the new addition. We are planning on putting a second story on our house (when we can afford it) and we will absolutely use Peter.
"
Beverly Hills
Pacific Palisades
Culver City
1 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for RCS Engineering Services
RCS Engineering Services
5.0(
3
)
ArchitectEngineer - Structural

Serving South Pasadena, CA and surrounding areas

Approved

In business since 2018

Offers commercial services

Customers say: Quick response

Our firm provides structural engineering support for all phases in the design and construction process. Our primary function is to create structural plan packages for submission to the governing authority. We are also available to conduct preliminary field visits and structural observations during construction. In whichever service you need, we pride ourselves in carrying out the job professionally, quickly, and for an affordable price.

Slab On Grade - Carport
Foundation Underpinning
Existing Wall
Existing Wall/ Form Work
FOundation Underpinning

+15

Response time8 hrs
Recommended by100%of homeowners
Avatar for Alpha Omega
Alpha Omega
4.0(
116
)
Engineer - Structural

Serving South Pasadena, CA and surrounding areas

Approved

In business since 2003

Free estimates

Small jobs welcome

"Structural Engineer Ehab contacted me about my residential property inquiry. He had already reviewed my property and the general situation I was inquiring about when I called him back. We spoke to me about his concerns with the project and answered all my questions over the phone. He was excellent to work with. Professional & Knowledgeable. Would highly recommend reaching out for technical issues concerning residential engineering. The reason he wasn't hired was that he provided feedback that dissuaded us from taking on a costly project that would not have achieved our stated goals. I will definitely reach out to Ehab in the future prior to beginning any major residential addition or remodel."
Plot Plan for Auto Dealer
Auto Body Shop
Response time10 hrs
Response rate86%
64 neighbors recently requested a quote
Avatar for AAA Engineering Design
AAA Engineering Design
4.1(
9
)
Engineer - Structural

Serving South Pasadena, 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
Peter T. Erdelyi & Associates, Inc.
3.9(
115
)
Engineer - Structural

Serving South Pasadena, CA and surrounding areas

Approved

In business since 1976

Free estimates

Warranties offered

"I couldn't find a structural engineer to look at my drawings and provide good engineering services until I called Peter. He was willing to look at the project even though there were still questions about the build to be answered."
 1
 PIC 1
 Picture 2
2
 Picture 3

+11

Response time2 days
122 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for JZ Structural, Inc.
JZ Structural, Inc.
5.0(
3
)
Engineer - Structural

Serving South Pasadena, CA and surrounding areas

Approved

In business since 2010

Free estimates

Small jobs welcome

JZ Structural, Inc. is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers interests, and make their concerns the basis of our business.

ADU
ADU
ADU
ADU
ADU

+38

Response time2 days
Recommended by50%of homeowners
Avatar for Pac Sands Corp
Pac Sands Corp
5.0(
7
)
ArchitectDraftsperson/CADD

Serving South Pasadena, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2017

Free estimates

Credit card accepted

"We did a full remodel of our place, full new kitchen, and expanded our place into the backyard for a new master suite. Pac Sands did a really great job with our designs. Great tools that made the communication easy with the plans and changes we needed. And they handled the engineering and permitting too, which was great. Highly recommend."
6-Plex Aerial view
6-Plex Render
Carlsbad 6-Plex Axo
Response time2 days
173 neighbors recently requested a quote
Avatar for Drafting Design Services
Drafting Design Services
4.8(
18
)
Draftsperson/CADD

Serving South Pasadena, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Credit card accepted

Offers commercial services

"If you?re here looking for an architect, look no further. Francisco is the man for the job. He helped us with a garage to ADU conversion. Francisco kept us informed and communicated with us throughout the entire project. He was very professional, helpful and patient. We had tons of questions and he had the answers. He is very efficient and great at his job. We would hire him again with no hesitation. Thank you Francisco for making for making this process a breeze!"
Response time2 days
3 neighbors recently requested a quote
Recommended by70%of homeowners
...
Showing 1-10 of 277
Structural Engineering FAQs, answered by experts

Yes, you can put a doorway in a structural wall; in fact, most exterior doors are set into structural walls. The project is a little more challenging than installing a door in a non-load-bearing wall because you need a structural engineer to assess the wall and make sure it’s safe to create a wall opening. Your engineer’s report will include instructions for your contractor on how and where to install additional supports, like steel headers above the door, to distribute the weight above to the wall on either side of the door.

Indications include cracks in walls, uneven floors, and sticking doors or windows that suggest foundation movements.

Water can seep into porous materials like wood beams, floor joists, and roof rafters within minutes, but they’ll need to see prolonged exposure before you have structural damage. Mold can start growing within 24 hours, and mold can eat away at the structural components over time. Wood rot is more of a concern, though. Wet and dry rot are fungal infections that set in in moist conditions and rapidly deteriorate wood, causing major structural damage within just a few months in some cases.

The best way to determine if ceiling cracks are structural is to hire a ceiling contractor to inspect the cracks and provide a professional opinion. That said, you might be able to make an educated guess based on the size and appearance of the crack. Larger cracks, cracks accompanied by sagging or discoloration, and cracks that travel from the ceiling down the walls are all signs of structural issues.

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. 

The South Pasadena, CA homeowners’ guide to structural engineering services

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