I have worked on multiple projects with Structural AF. They have always been professional, easy to…read morecommunicate with, quick, and thorough. They are fantastic!

One of the best architectural and engineering company in LA. I have done a few projects with them…read more All the project I have done it's really convenient and nice open floor design, they know how to do it to be convenient to live in it house with all the features you need in the house and a lot of times you don't even think about it but it's there. The drawing is very detailed if you want to find the measurements, it's there in front of you compared to other architects that cannot find any measurements Another best thing is that they are always there every time you call them. You don't have to hustle to be in touch with them for any questions you have. I highly recommend them

We had a fantastic experience with Alpha Structural on a challenging structural project. We needed…read moreto replace a 25-foot beam in our cathedral ceiling and sister lots of rafters--work that could have easily turned into a major disruption if done from the exterior. The team found a smart solution to complete the entire project from inside the house, which allowed us to avoid opening the roof and dealing with weather exposure. That alone gave us a lot of peace of mind. Aldo, the structural assessor, was especially helpful throughout the process--patient with our many questions, clear in his communication, and thorough. Erick was consistently responsive as things came up. On site, Gilberto did excellent work with the team and provided steady, capable support through the build. Overall, we're very grateful for their professionalism, problem-solving approach, and the quality of the finished work.

Chris came to advise and measure for a drainage system and was incredibly knowledgeable and…read morethoughtful about the project. His expertise and experience is valuable to us. In addition, we have to commend him for previous work. He is completed on our property on foundation work, including a retrofit. We will always have Chris come to the rescue. Way to go Chris.

I recently hired this company for foundation repair and earthquake retrofitting at my home. Their…read morepricing was reasonable, and the entire process was handled with high efficiency. Thanks to Guillermo's crew, Ignacio, and Skyler for the hard work. They also sent over the project photos via email afterward for my records. Very professional--highly recommend!

wanted to have an EBB retrofit done to strengthen my house, along with some necessary foundation…read morerepairs. I received quotes from a couple of companies, and while these guys weren't the cheapest, they were definitely the most knowledgeable and took the time to clearly explain how the repairs would be done. They completed the job in just two days and repaired two addional piers, and everything went smoothly. I do have a slight squeeze in one area of the floor in my raised home, and I'm currently waiting for them to come back and take a look at it. I know pier repair is not much complicated but their crew was professional and their price was reasonable. I would highly recommend these folks.

We had multiple structural issues with our driveway gate that was poorly installed by a licensed…read morecontractor. We hired Evgeny to provide his expert engineering advice. He was not only highly professional but extremely helpful in guiding us how to resolve the issue. He even included a CAD design for us to present to the contractor for a reasonable price. We highly recommend Evgeny and would hire him again for engineering needs.

My husband and I are very happy that we turned to Evgeny. He proved to be very professional and…read morepunctual. He came and inspected our roof, as we were planning to install solar panels with Tesla. However, Tesla refused to provide a 100% offset and only offered 66%, claiming that there were issues with our roof. So we started looking for an engineer who could assess the real condition of the roof. Evgeny arrived right on time and did a thorough inspection. All the paperwork was ready the very next day. We 100% recommend him!

I found Sam through Yelp. At first, we were both not sure whether we will work together because he…read morelives more than 20 miles away from where I live, and I'm the type of person who is always skeptical about what I read on the internet. But now I'm very happy that Sam decided to take on the job and develop the structural calculations and drawings for removing a load bearing and shear wall at my Condo. The Project started in September 2025 with initial submittal of permit application package to the City. It went into construction about four (4) weeks ago and was successfully completed today (5/8). During the process, we developed trust for each other. I contacted Sam numerous times for questions, problems and consultations and he was always responsive. He and my architect friend worked together to develop the initial design but had to modify it to overcome a major obstacle that came up during the construction. He came over for construction observations and gave instructions to the contractor how to strap the beams together for maintaining structural integrity of loading and shearing. His fees were much lower than another builder whom I also got a bid from, and his approach to things was much simpler and yet conservative to that from the other firm. I told Sam, whether it is good or bad, I don't usually do reviews for others. But for him, I will do one. I'm thankful to have a great team of Sam (the engineer), my architect friend, and excellent construction crew to help me complete this project.

I am a homeowner and have only good things to say about working with Sam. He was recommended by…read moreour architect to do the structural drawings and observations for our renovation project. Sam is easy to work with, responsive and explains things very well - even to someone like me who doesn't have an engineering or construction background. He gave me a time frame that he needed to complete the drawings and stuck to it, which I really appreciate. He communicated well with my contractor and considered different options for how to approach the structural challenges. I've worked with other structural engineers over the years, and I found Sam to be the most professional. I've had engineers disappear mid-project, deliver weeks/months after they said they would, and/or bill more than initially agreed upon - not Sam. He does what he says. Definitely would use him again.

Stop reading reviews. Art and Extreme Home Addition is the right choice when it comes to your next…read moreremodel. We needed an architect and a remodel expert. Art handled the entire project from securing permits, connecting us with an architect and executing the project with diligence and great results. Santos and Carlos were instrumental as well. Thank you for everything, Art! We hope to work with you in the future!

Can't say enough great things about Art and his group. From the very idea of redoing our bathroom,…read morewe were given thoughtfully considered insight into getting the best quality while also stretching our money as far as possible. Even though I know my wife and I were incredibly frustrating in how we changed some details mid-stream, everyone on the team was helpful, communicative, and always in great spirit to accomplish our dream bathroom. What more is there to say? There's too much money, too much unknown when you're renovating your house, and trust is the most valuable asset you can have in a contractor. Trust that they are working doggedly for you. Trust that the work is great. Trust you are getting way more than your money's worth. Well, we trust Art and Extreme Home Addition intrinsically. You should too.

I would recommend Arthur to anyone as good business deserves more business!…read more We are new to our condo and were easily intimidated by our HOA board cause we wanted to open up our kitchen by 5 feet! They required an approval of a licensed Structural Engineer before we could begin any work. I called around but liked speaking to Arthur who was very knowledgeable on the phone and was willing to work with my schedule to inspect the property asap. He was very punctual and courteous all in all Arthur is AWSOME, his knowledge & demeanor is very professional and patient. He takes the time to fully understand the issues and pain points that as a new homeowner helps quite a bit. He has approved our plans and will send the desired letter in order to continue our renovation.

We hired Arthur to design structural plans for our house addition. Not only is he thorough,…read moreprofessional and punctual, but he's been of great help, advising the best solutions and material for us. Highly recommended!

I didn't have a great experience with ProStruct. The manager who handled my case, Irvin, was nice…read moreenough, but otherwise, I would advise looking elsewhere. I specifically requested a civil engineer to look at the drainage situation at our house, along with the waterproofing at our exterior doors. Their web site states that they have civil engineers on staff, and I therefore thought they'd be able to help. In my case, however, they sent a structural engineer and he didn't have a whole lot to say and was apparently unable to comment with any level of detail about the concerns I had regarding drainage or waterproofing. It was honestly just an $1100 waste of time.

I worked with Prostruct Engineering on a residential interior wall removal project. I was very…read morepleased with their professionalism and services. The project manager, Nithin and project success associate, Joshua were always in the loop of communication. In the process, Nithin was very responsive to answer questions and make necessary drawing changes according to the requests. The project was done in a timely manner with reasonable cost. Overall I was impressed with their performance, quality, schedule and cost!