1. Cornerstone Global Engineering

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San Marino, CA

Cornerstone Global Engineering

5.0 (3 reviews)
Closed • 9:00 am - 5:00 pm

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Services - Cornerstone Global Engineering

Structural engineering project consultation

Structural drawing

Structural engineering design

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FJ Engineering Design - Before, low 8ft ceilings.

FJ Engineering Design

(78 reviews)

5 Stars! I highly recommend FJ Engineering. They served as the structural engineer of record (SEOR)…read morefor our major single-family home remodel and addition. Their expertise literally saved our build from a very poor framing contractor. The contractor caused massive delays due to non-existent planning, mismanaged materials, and repeatedly misinterpretation of the structural stamped drawings, including framing ceiling joists improperly and installation detail errors. Fortunately, the owner, Francisco Garcia, stepped in with efficient practical solutions for every single error while maintaining code compliance and structural integrity. Francisco was incredibly patient, performing comprehensive hold point inspections, clearly explaining details to help contractor's rework and omissions. He accommodated last minute inspection requests time and time again. Now that framing is officially signed off by the city, we have absolute peace of mind. Francisco and his team are the communicative, professional experts you want in your corner, whether for a remodel or new construction. FJ Engineering will contribute to the success of your project through the value they bring from initial development of structural plan drawings and his diligent oversight through final sign-off.

What can I say other than Francisco is top shelf! A true professional and at the core passionate…read moreand caring about your project. He helped me with an undefinable situation at my home with some concrete. My home is over 90 years old. The construction has been wonky at best. Francisco took his time to help me understand some foundational work. His positive attitude, promptness, and shear humanity sets his company apart! Thank you Francisco I will never forget your generosity!

JZ Structural - fixing shear wall due to water damaged

JZ Structural

(20 reviews)

Working with Ellen, Julian, and others from JZ Structural was great. They were extremely…read moreresponsive. They also diligently worked with the city, project manager, and other contractors to get the job done. Ellen and Julian also provided a very personal touch with guidance in hiring contractors, materials to use for the project, and design. They explained everything to us in detail and were always available to answer any questions and address our concerns. Overall, JZ Structural provided us with a great experience. Would highly recommend getting in touch with them if you need help with building and large renovation projects.

I felt it was important to share our experience with JZ structural as I ultimately went with them…read moregiven their high Yelp reviews. However, my experience was negative to say the least. Ellen was responsive initially, but this was only until they received payment. After this, trying to get a response was like getting blood from a stone: close to impossible. My architect had asked Julian, the engineer, if he could draw a rough mock up before he put together a full set of plans (to which he agreed). We never got this, despite checking in multiple times, and instead, it was only right upon the 'deadline' we had provided for the project that we received a full final set of plans. This was disappointing. The plans themselves were riddled with errors: it seemed like a lot of copy / paste work rather than careful attention to detail. The wrong county was listed, and certain structural details were copy pasted from the wrong city, which my architect had to point out. We had around 30 local contractors look at the plans, as well as two peer reviews of the plans from other licensed structural engineers, and the feedback was that it had been over-designed (consistent with one of the other yelp reviews). After multiple emails attempting to get Julian (the engineer) on a call, he was incredibly defensive, and rude. It was at this point, I was appalled that he would speak to a client like this, so decided to cut ties with this company and use another structural engineer instead. If you are in absolutely no rush, and have no concerns about over-design: perhaps this company will work for you. But for our residential project, this was one of the worst experiences I have had with a "professional" service, and I want to warn others.

STEN Engineering - STEN Engineering

STEN Engineering

(37 reviews)

I scheduled a consultation with Eugene from STEN Engineering to discuss two very different…read morestructural issues at my house, and I was extremely impressed. The first was figuring out how to realign a very complicated roofline so that rainwater would channel properly. The house has been built and added onto in stages over roughly 100 years, so every addition and alteration made the roofline more complicated and less cohesive. I had literally spent hours sitting on the roof trying to figure out a workable solution. Eugene looked at the situation, thought it through for about 10 minutes, and sketched out an option that simply would never have occurred to me. It was practical, elegant, and made immediate sense. The consultation was some of the best $400 I've spent. The second issue was understanding how well the house is braced for earthquakes and how the existing foundation works structurally. Again, Eugene combined a strong engineering mind with real-world practical experience and explained everything in a way that I could actually understand. I almost never take the time to write reviews, but I was impressed enough that here I am writing one. Eugene is smart, thoughtful, practical, and very good at explaining complicated structural issues in plain English. I would absolutely call him again.

Excessive Charges, Terrible Communication, and Poor Customer Service…read more My experience with Sten Engineering has been extremely frustrating. What started as a $1,500 charge for structural plans to remove a load-bearing post ballooned to $6,000 to add a sliding door. Worse, I wanted to open up both sides of my fireplace, but the engineer insisted only one side could be modified. My new contractor believes both sides can be opened, yet Sten now wants another $2,500 just to add a window to the plans! Their proposal lists revisions at $100/hour, so how does adding a window justify 25 hours of work? Communication has been appalling. Every time I reached out with questions, the focus seemed to be on collecting the next installment rather than providing answers. Management doesn't respond, and I had to contact the city myself to clarify that the change could be submitted as a revision. We are days away from demolition, and instead of helping move the project forward, they want to charge thousands more. Extremely unprofessional, unresponsive, and seemingly more interested in collecting payments than helping clients. I deeply regret hiring them. Homeowners, beware!

MK Builders - TPO

MK Builders

(152 reviews)

I over see a commercial building with 16 units of flat roofing material. The owner was tired of…read moredoing patch work and constantly having issues whenever it rained . We wanted a solution that wasn't putting a bandage over and over again. MK builders gave us a good quote on a TPO roofing system . We liked the manufacture and after doing research from the other roofing companies I felt most at ease with Robert and Richard . They were a pleasure to work with and updated me step by step from when the permits were pulled to , demo and inspections . Job was completed within the scope and timeline they gave me . This is a family run business but are true professionals in what they do. They handle their clients with great customer service from start to finish . I whole heartedly recommend MK builders to anyone who needs help with their roof. Reach out to them and see for yourself!

I was told by one of my friends to give these guys a call if we needed an estimate for a re roof…read moresince they used them before. I was helping my parents with their apartment complex and we knew it was time to replace the entire roof. We got five bids before deciding to go with MK Builders. My initial visit with Richard and Robert went very well as they were prompt and very detailed. We got a bid the next day and based on our friends references along with our conversations we felt at ease with them. We are glad we hired them to install new shingles, as they took care of all permits, inspections and cleaned up daily. They were great throughout the whole process giving me and my family updates on progress along with when the final inspection would be. Honest and reliable roofing company and I would recommend them to my friends and family moving forward as well.

Cornerstone Global Engineering - structuralengineers - Updated November 2026

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