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

Serving Duarte, CA and surrounding areas

Approved (Corporate)

In business since 1992

Free estimates

Emergency services offered

"I worked with Alpha once before, and they assisted with a second project 2 years ago which, now finally completed, I'm able to write a review about. Alpha helped with structural plans for windows in a garden level unit in order to prepare the proposal for city approval. Alpha is a big company and it took them a little while to complete everything; however I can certainly say that the engineer and contact people were knowledgeable and thorough. The plans were approved with their help and now that the unit is permitted for occupancy, the windows are a lovely attribute to the space."
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%
20 neighbors recently requested a quote
Avatar for RCS Engineering Services
RCS Engineering Services
5.0(
3
)

Serving Duarte, 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 VC Architecture & Design
VC Architecture & Design
5.0(
6
)

Serving Duarte, CA and surrounding areas

Approved

Free estimates

Small jobs welcome

Customers say: Quick response

"Raj is an exceptional engineer with a world view centered on value and helping people. He help me through a tough problem with a roof structure issue quickly and efficiently."
1 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for ESL Designs
ESL Designs
4.7(
33
)

Serving Duarte, CA and surrounding areas

Approved

In business since 2018

Free estimates

Small jobs welcome

"Eran quickly responded to my inquiry regarding a load bearing structure of my home. He sent his structural engineer to determine if the structure was a load bearing problem. The engineer was able to determine 100% that it was not a load bearing structure. I would definitely recommend them to anyone who needs structural engineering solutions."
3D Design for a Remodel
New Build
Kitchen Remodel
Bedroom
Bedroom

+23

Response time1 day
Response rate100%
5 neighbors recently requested a quote
Peter T. Erdelyi & Associates, Inc.
3.9(
115
)

Serving Duarte, CA and surrounding areas

Approved

In business since 1976

Free estimates

Warranties offered

"Having built many projects and delt with many engineering firms in my business, I’m very impressed with how quick and professional they are, I personally met with Peter himself, a class act gentleman all the way! I would recommend him and his team without a doubt, look forward to giving them all my projects from now on, apricate all you and your team are doing for us. Thanks guys!"
 1
 PIC 1
 Picture 2
2
 Picture 3

+11

Response time2 days
102 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for AAA Engineering Design
AAA Engineering Design
4.1(
9
)

Serving Duarte, 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

22 neighbors recently requested a quote
Recommended by66%of homeowners
Avatar for Eagle View Remodeling
Eagle View Remodeling
4.7(
75
)

Serving Duarte, CA and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 1989

Free estimates

Emergency services offered

"I was referred to 800 Remodeling by Angie's List, and the owner, Amir, called me literally minutes after I received the referral. I described my situation to him and we scheduled a meeting at my home for the following day. He arrived promptly and immediately introduced himself with a picture ID and his state contractor's license. After inspecting the cracks that were of concern to me in a structural post supporting a major beam, he took some pictures and promised to get back to me with some recommendations. The next day, he called just as he had promised, told me that after talking with a structural specialist he did not believe the post needed to be replaced, but nevertheless gave me a rough-order-of-magnitude estimate on what a replacement would cost, should I decide to have that done. After some additional research, I concluded that the cracks are typical and not impairing the structural integrity of the post, and decided for added insurance simply to reinforce the post with some wrap-around steel bands. Since that is a small and simple job, Amir offered to refer me to someone else to do that job for me. He did not charge me for the consultation or the time he spent in discussions with other specialists. So although I ultimately didn't hire him for this job, I was impressed by his professionalism and shall definitely be contacting him again for some larger jobs I am planning in the future."
New Constraction
New Constraction
New Constraction
New Constraction
New Constraction

+145

Response time8 hrs
Response rate99%
47 neighbors recently requested a quote
Avatar for Alpha Omega
Alpha Omega
4.0(
116
)

Serving Duarte, CA and surrounding areas

Approved

In business since 2003

Free estimates

Small jobs welcome

"If you need a Structural Engineer you call Ehab at Alpha Omega hands down! He is knowledgeable, professional and easy to do business with. Thank you"
Plot Plan for Auto Dealer
Auto Body Shop
Response time10 hrs
Response rate86%
65 neighbors recently requested a quote
Avatar for Design 1 Studio
Design 1 Studio
4.9(
74
)

Serving Duarte, CA and surrounding areas

Approved

In business since 2014

Free estimates

Credit card accepted

"We went through two other designers before finding Design 1 Studio and wish we had found them first. They designed a second-story addition for our home in Alhambra and the structural plans passed plan check with zero corrections. Our contractor was impressed, which says a lot."
Different Projects
Different Projects
Different Projects
Different Projects
Homes and Buildings

+30

Response time1 day
9 neighbors recently requested a quote
Recommended by22%of homeowners
Avatar for JZ Structural, Inc.
JZ Structural, Inc.
5.0(
3
)

Serving Duarte, 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
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Showing 1-10 of 242
Structural Engineering questions, answered by experts

Any issue that affects the structural integrity or soundness of a home is considered a structural issue. In addition to foundation cracks, other signs of structural issues include roof leaks, bowing walls, sloping floors, gaps around windows and doors, and more.

No, squeaky floors do not always mean there is structural damage. The noise is often caused by friction from issues like loose floorboards, gaps between the subfloor and joists, or loose subflooring. While many squeaks are harmless, persistent or worsening noise could indicate a more severe problem. If you notice other signs of structural damage—such as soft or sagging floors, cracks running from the wall to the ceiling, or horizontal cracks in your foundation—it's best to have a professional inspect your floor to determine the root cause.

Many horizontal cracks in home foundations result from water and soil pressure from outside of the building or from a footing that is shifting. Under those circumstances, horizontal cracks are a structural problem that requires repair before they become worse and more difficult to fix. However, in very specific cases, thin horizontal cracks may simply be a cosmetic blemish due to concrete shrinkage.

Structural engineers typically conduct inspections during a home sale or renovation, looking for signs of structural damage in various structures throughout the building, such as load-bearing walls, joists, beams, roofing trusses, foundations, and chimneys. Some of the warning signs that structural engineers check for include:

  • Dry rot

  • Infestation

  • Shifting or cracking foundations

  • Erosion

  • Water damage

  • Sagging, shifting, or damaged walls, ceilings, or roofing support

The 10 10 rule describes the formula most contractors use to determine how much to charge for a job. Allowing for 10% overhead above the total projected cost to do the work and 10% profit sets a contractor up for success, even if there are delays or other problems on the project. This formula isn’t a hard-and-fast rule, but it is a ballpark figure to begin with when estimating your expenses on a job.

The Duarte, CA homeowners’ guide to structural engineering services

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