California Energy Consultant Service

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James Gillis

I couldn’t be happier with the complete exterior transformation performed on the back of my house, chimney, and the installation of a brand-new window. From start to finish, their team delivered outstanding craftsmanship, professionalism, and meticulous attention to detail that far exceeded my expectations. The crew arrived on time, worked efficiently, and treated my property with the utmost respect—cleaning up thoroughly each day. The new siding is flawless, perfectly matched, and has dramatically improved both the look and weather protection of my home. The chimney re-siding was a standout—tackling a challenging, high-visibility area with precision and care. The new window was installed perfectly: level, sealed tight, and operates smoothly, with clean trim work that blends seamlessly. But the painting truly set them apart—impeccable. Smooth, even coats, zero drips, razor-sharp cut-ins around the window, trim, and chimney flashing. It looks like a professional showroom finish. Communication was excellent throughout. The estimator was knowledgeable, the project manager kept me informed, and they even reinforced a small area near the chimney flange at no extra charge—just because they wanted it done right. I highly recommend for any siding, window, or exterior project. Fair pricing, superior quality, and a team that takes genuine pride in their work. My house looks brand new—thank you for a job exceptionally well done!

Quan Ky Au

Exceptional Service from Start to Finish! I spent a really long time researching companies for our massive project (replacing 28 windows and 1 sliding door), and I am so glad we chose CECS. The job was completed perfectly in just 3 days. Dave (Sales) was excellent and knowledgable. He answered all my numerous questions right away and I felt absolutely no pressure from him—just honest, helpful advice. The installation team, Ismar and Jose, went above and beyond! They were professional, efficient, and truly did everything I asked for and more. They treated our home with respect and the quality of the installation is flawless. If you are looking for top-tier quality and service, look no further than CECS. Highly recommend!

Micah A

We needed a total of like 9 windows and 3 sliding glass doors. Our home had windows from the 1960s, and we needed to replace them but this was my first house so I got a LOT of quotes, because I had no idea how much windows were. Cal Energy was the second lowest quote (with like a $200 difference) and the lowest quote BY FAR from a window company with a license and reputable background, so it was an easy decision. We had Andersen windows installed and also Andersen sliding glass doors - including two 10 foot sliding doors - and the installation was perfect. The windows are awesome. We had them install full frame / new construction style and they look great. We also use them for HVAC now and we are going to use them for roofing and siding if we decide to do metal roofing in the next few years. Strong recommend.

Nancy Knott

CECS replaced all of the windows in my rental unit and installed 2 sliding glass doors. They did a great job and kept the work site clean and organized. Alonso and Roger were great to work with along with my salesman, Felipe. I would recommend CECS for your project.