Cecilia home (Arch Design)

Great 4.7(253)
Licensed
  • 443 hires
  • Based in Concord, CA
  • 6 years in business
  • 7 employees
  • Responds in about 1 hour
  • Background checked
  • License verified

About Cecilia home (Arch Design)

We are a professional engineering firm specializing in structural design for load‑bearing wall removal, new construction, remodels, and foundations. In addition, our team provides full architectural services for additions, new builds, and renovations, offering a coordinated approach from concept to construction. We also design decks, pergolas, swimming pools, retaining walls, public sidewalks, and cell phone towers, with careful attention to safety, code compliance, and functionality. In business for 22 years with a dedicated team of 24, with professional civil engineer license (PE). We combine technical expertise with a personal touch—the company is proudly named after my daughter. If you’re planning a project and need reliable structural or architectural support, we’d be happy to discuss your ideas and next steps.

Reviews

Thumbtack customerOct 2026

Jason and Mason are very helpful and professional, providing detailed analysis for the structure of my retaining wall. Many thanks

Thumbtack customerSep 2026

Very response, and over the phone he was very kind and giving his opinion about the issue we had; he also wasn’t pushing to pay for it, just to think bout it.. but overall, his kindness over the phone was comforting to our problem..

TOM T.Sep 2026

Still wsaiting for a retaining wall design

Thumbtack customerAug 2026

They came in time to take the measurements. The main reason I have asked for an analysis was due to some cracks I had on ceiling which they have identified the root cause.

Thumbtack customerMay 2026

Very good. Fast follow through and took time to answer all of my questions.

Thumbtack customerMay 2026

Cecilia home called us soon after we sent the request. He professionally explained and provided valuable advice for our issue. When we called him again after 2 days, he patiently clarified all our questions and gave us free idea. He is very knowledgeable and experienced. Really appreciated his help. We strongly recommend him and his team for anyone who needs structural engineering services.

Dane C.Feb 2026

I hired Cecilia and the team for a structural peer review on a residential beam and post project. They were responsive, professional, and easy to work with. Their review was clear and helpful, and they provided solid technical feedback that gave me confidence in the final design. Overall, a smooth and positive experience. I would gladly work with them again!

Thumbtack customerFeb 2026

Mason and team are amazing. They are team of excellent engineers. I have hired him for 3 projects till now and all have been great

Shaun D.Apr 2025

Very knowledgeable and discussed various options with us.

Jeffrey G.Mar 2025

Cecilia delivered high quality prints with exactly the information I was looking for. They work very efficiently and are very friendly.

Viet M.Sep 2023

They finished the task in a very quick and efficient manner!

Rajvi P.Jul 2023

Great value provided with honesty.

Vivek J.May 2023

Mason is extremely professional and knowledgeable about his work and is very responsive. He helped me understand all the concepts around easement and building the driveway for my property over the phone. He clearly outlined the scope of the project and the time estimates along with the cost and it was very helpful for me to understand the entire picture. I will certainly use him for my project in the near future as I'm still waiting for some other things to be finalized before I can use his services but I would highly recommend him based on my experience so far.

Maricris W.Jun 2022

The plans are not ready yet and the project is still on the process. Cecilia Home team is working hard for us to get to the finish line. Can’t wait for the final product!

Chetan P.Feb 2022

Having worked with 3 different engineering firms last year, I can tell that Mason and his team are honest and great to work with. Delivered on time and also quickly addressed the city’s comments. I am now working their team on our 2nd project and hoping to continue the collaboration. Highly recommend to give them a try.

Ann R.Aug 2021

Mason was super prompt in helping me to understand the requirements of my project. He even shared additional reading materials for me review in helping to assess a contractor for the seismic retrofit project.

Richard J.Apr 2021

Very insightful & cordial. Would recommend for his valued expertise & experience. Provided 2 referrals for foundation repairs without being asked! Thanks for being of assistance, so far.

Yogi A.Jan 2021

Masons ethics are at a level I have rarely seen. He was helpful, knowledgeable and efficient. Look forward to working with him again.

Lani S.Nov 2020

mason (Lei Zheng) did a foundation evaluation and earth quake retrofit reinforcement structural design for my house. The job has no complaint. I will recommend him to anyone who need structural service.

Services

Cecilia home (Arch Design)★ 4.7
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