Overview
About Us
Century Roof and Solar Inc, Specializes in installing roofs with a systems approach, paying special attention to ensure all components of a roof and solar system are designed to work together. As an installer of photovoltaic (PV. For more information please log onto our website for your roofing needs at www.centuryroofandsolar.com and for your solar needs www.noutilitybill.com
*Contractors enrolled in GAF certification programs are not employees or agents of GAF, and GAF does not control or otherwise supervise these independent businesses. Contractors may receive benefits, such as loyalty rewards points and discounts on marketing tools from GAF for participating in the program and offering GAF enhanced warranties, which require the use of a minimum amount of GAF products. Your dealings with a Contractor, and any services they provide to you, are subject to the Contractor Terms of Use.
Customer Reviews

"Century Roof and Solar installed solar panels on my roof that Century had installed some years ago(that installation went perfectly). They also performed some roof repairs, cleaned the gutters, installed gutter screens and metal caps on exposed beams. No problems whatsoever with any of the work. The communication from this company is outstanding as is the quality of their work. I recommend them for any roofing task and for solar installations without reservation."
"Solar System Installation & Electrical Upgrade (Oct-Nov 2021) I cannot say enough about Tony Diaz and his Century Roof & Solar company and project team - Dan, Luciano, Emilio, and Elena. My wife and I had a wonderful experience with our solar project. Century installed our SunPower 4.62Kwh with a Sunpower Sunvault battery backup system, did a complete home electrical upgrade, and added new or replaced old light fixtures for LED conversion. The project was major, but from start to finish, everything ran smoothly like clockwork. As with any older homes, we had a few unexpected issues, but Century quickly assessed and resolved them. Our house needed a complete electrical upgrade to meet safety requirements and maximize solar energy use. Century is an electrical contractor and has certified "in-house electricians", so from our standpoint, they are conveniently a one-stop shopping business. This was a relief because other electricians we contacted were either non-responsive or knew nothing about preparing home electrical for solar. In contrast Century is well versed on both Solar and general Home Electrical. Our whole project was done in a highly professional manner. The expertise and recommendations that Tony and Dan (electricians) offered were invaluable. We were always updated on the progress and all questions were answered with informative explanations. We highly recommend Century Roof & Solar to anyone."
"We used Century Roof and solar for 3 roof replacements and 2 solar installations. They did a great job. Tony communicates exactly what is going to happen, they are on time, they clean up very well after each day. would use them again in a heartbeat."
- "Century Roof and Solar installed solar panels on my roof that Century had installed some years ago(that installation went perfectly). They also performed some roof repairs, cleaned the gutters, installed gutter screens and metal caps on exposed beams. No problems whatsoever with any of the work. The communication from this company is outstanding as is the quality of their work. I recommend them for any roofing task and for solar installations without reservation."
- "Solar System Installation & Electrical Upgrade (Oct-Nov 2021) I cannot say enough about Tony Diaz and his Century Roof & Solar company and project team - Dan, Luciano, Emilio, and Elena. My wife and I had a wonderful experience with our solar project. Century installed our SunPower 4.62Kwh with a Sunpower Sunvault battery backup system, did a complete home electrical upgrade, and added new or replaced old light fixtures for LED conversion. The project was major, but from start to finish, everything ran smoothly like clockwork. As with any older homes, we had a few unexpected issues, but Century quickly assessed and resolved them. Our house needed a complete electrical upgrade to meet safety requirements and maximize solar energy use. Century is an electrical contractor and has certified "in-house electricians", so from our standpoint, they are conveniently a one-stop shopping business. This was a relief because other electricians we contacted were either non-responsive or knew nothing about preparing home electrical for solar. In contrast Century is well versed on both Solar and general Home Electrical. Our whole project was done in a highly professional manner. The expertise and recommendations that Tony and Dan (electricians) offered were invaluable. We were always updated on the progress and all questions were answered with informative explanations. We highly recommend Century Roof & Solar to anyone."
- "We used Century Roof and solar for 3 roof replacements and 2 solar installations. They did a great job. Tony communicates exactly what is going to happen, they are on time, they clean up very well after each day. would use them again in a heartbeat."
- "Tony, Elena, and their crew are just great. Knowledgeable, helpful, friendly. We had a small fire which took out a 100 amp branch circuit feeding our back yard. Because there were some sensitive things on that circuit, we needed it back up and running ASAP. Century had done our roof and solar array several years ago. Because they had done such a great job then, they were the first I thought of to help us out this time. On Monday, Elena responded first and quickly got Tony involved. They inspected on Tuesday. As it was a large job to repull the entire circuit, they needed to order materials and schedule the crew. They arrived on Friday and did all of the demo and setup. Slight hiccup on one item, but they handled that and powered through. Finished up early on Monday and we were back in business. Century will be first on my list for any future electrical, roofing, or solar work."
- "We have been absolutely delighted with Century Roof and Solar. They are Diamond Certified and did a great job with our new roof several years ago( my daughter and son-in-law also used them...) We got 3 quotes for a solar panel system( Sunpower) with backup Sunpower battery. Century was actually the lowest bid. We called around for references and word has it that Tony Diaz is one of the best, most knowledgeable electrical contractors in Northern California. He apparently trains others in the how-to-dos of solar system installation. The results are even.better than we hoped for...we have a number of gables on our roof but the conduit lines are clean, well hidden. Tony actually ran one under our house. Installation is complicated with numerous inspections and approvals required. Tony kept the process moving along well and did the requisite forms and diagrams for PGE for us. We have dealt with many contractors over the years and would give our highest recommendation for Century Roof and Solar to anyone considering installation."
- "I was recently considering a new roof and solar array installation at my home in San Ramon and called Century Roof and Solar for a bid. Unfortunately, due to circumstances beyond my control, this project had to be shelved for a couple years. However, since Tony Diaz, the owner of Century Roof and Solar in Hayward, CA, is also a fully licensed electrician he offered to do a needed upgrade to my main electrical panel in advance of the new solar system. He did a perfect job of installing a beautiful, modern, new “solar ready” main panel from which he also ran a new arc-fault protected 50amp outlet for EV charging. He accomplished this at price parity with another local electrician’s bid, but went beyond the other offer by including a whole-house surge protector in this new panel and handling the stucco patch around the panel “in house.” My other bidder on the job specified that “stucco patch to be done by others.” Since I don’t have ready access to such a technician this was a big plus in terms of choosing Tony for the project. Tony managed to get my job done in one day, despite the rainy weather that greeted our agreed-upon installation day. Thus I was not be left without power over night in mid-March. To accomplish this there had to be some very adroit interactions with both the PG&E representative and the city inspector. In this respect Tony’s experience, knowledge and communication talents really did shine. Communication with Tony, before and after the job was done, was clear, prompt and easy. He entertained all my questions and concerns without hesitation, condescension, or sense that I was over-burdening him. It is also noteworthy how respectfully and smoothly the Century Roofing team works together. As a home-owner who likes to hover a bit and learn what he can when projects are ongoing, I can say they were a pleasure to be around. Also Tony’s plain-spoken and infectious enthusiasm for the project at hand has left me solidly feeling that I received the highest possible value for the money spent. I now have total confidence that when we finally engage in the roof and solar project it too will be a high-value job, superbly done."
- "Century Roof and Solar replaced our roof in 2008, installed a terrific solar system in 2017, and helped us with our generator system in 2020. Their work is consistently excellent and the materials they use are first-rate. Each of the jobs they have done for us has been on time and within the project budget, and they are really diligent about safe and clean working conditions; we have especially appreciated their careful cleanup of the site at the end of each workday. Tony Diaz is a GREAT guy to work with, and his entire crew is well-trained, knowledgeable, and reliable."
- "Century Solar installed solar panels on my composite roof and I couldn't be happier. Tony Diaz and his team's knowledge, attention to detail and craftsmanship in installing my solar system was simply phenomenal. I didn't realize how complex an installation could be. Tony answered all my questions, incredibly responsive and continually kept me abreast of my installation. I would recommend Century Roof and Solar to anyone. They are simply the best!"
- "Tony and his team were great partners in getting our new roof and solar system built - always professional and helpful, and the workmanship (and cleanup) were top notch."
- "The owner of Century goes out of his way to share the details of all your options. We chose to install 2 temperature control 120v Roof fans that remove the all-night high heat in the house. He also made light repairs to a couple of locations on the roof that he could not walk away from in the area he was working. The work team was professional and completed the same date as quoted."
- "Outstanding service professionalism: 5 quality: 5 value: 5 "All I can say is outstanding. The quality of the work, the attention to detail, and the pride of workmanship by Tony (owner) and team was well worth the agreed to price. Should you need solar or roof repair, don\'t look any further. You can have confidence when you call Tony at Century Roof & Solar!""
- "Outstanding customer service and quality work! We were very pleased with a roof repair they did in 2004. So in the Fall of 2019 we got two bids for a new roof and Century’s bid was clear, detailed and came in under the other one. We also had them replace our roof insulation. Their crew was professional and respectful of our property. At the end of the day, the crew always cleaned up. We highly recommend Century!"

"Contractor review"
"BHe and his pest contractor have ever worked with"
"Customer asked us not to share his/her review."

- "Contractor review"
- "BHe and his pest contractor have ever worked with"
- "Customer asked us not to share his/her review."
- "Professional & Knowledgeable"
- "PROFESSIONAL AND KNOWLEDGEABLE"
- "Customer asked us not to share his/her review."
- "Customer asked us not to share his/her review."
- "Customer asked us not to share his/her review."
- "Customer asked us not to share his/her review."
- "Customer asked us not to share his/her review."
- "Customer asked us not to share his/her review."
- "CENTURY ROOF AND SOLAR"
- "Customer asked us not to share his/her review."
- "ROOF PROFESSIONALS"
- "Customer asked us not to share his/her review."
- "PROFESSIONAL AND KNOWLEDGABLE CONT."
- "PROFESSIONAL KNOWLEDGEABLE CONTRACTOR"
- "HIGHLY PROFESSIONAL VERY KNOWLEDGEABLE"
- "Customer asked us not to share his/her review."
- "Customer asked us not to share his/her review."
- "Customer asked us not to share his/her review."
- "Professional Contractor"
- "Are professional, responsible, responsive to my needs, can adapt to changing conditions"
- "TOOK MY NEEDS INTO CONSIDERATION, WAS NOT HIGH PRESSURE"
- "Customer asked us not to share his/her review."
- "Customer asked us not to share his/her review."
- "Customer asked us not to share his/her review."
- "did a great job"
- "are the best company"
- "gave us excellent service with a quality product at a fair price and completed the project ahead of schedule"
- "Do a great job and a use a great product"
- "Customer asked us not to share his/her review."
- "went above and beyond my expectations, regarding roof info, product info, install, and my satisfaction"
- "were honest."
- "are conscientious and professional. They truly strive to do a great job."
- "will feel very happy like me"
- "Customer asked us not to share his/her review."
- "Customer asked us not to share his/her review."
- "Customer asked us not to share his/her review."
- "delivered what they promised."
- "are the best at installing roofing, they come up with solutions to customers unique roofing needs or problems. Tony Diaz represnted his companies strengths in handling customers needs. He came to our home well prepared with pages of satisfied customes and pictures/videos of previous jobs. Noe of the other companies I contacted even oftered to provided us with these, only their 25-50 years of experience."
- "ARE PROS AND DO WORK THEY SAY THEY WILL"
- "RELIABLE VERY KIND"
- "Customer asked us not to share his/her review."
- "exceed expectations throughout the entire process."
- "are top in quality and workmanship"
- "ALWAYS HAVE RECOMMENDED THEM"
- "ACTED PROFESSIONAL FROM TOP TO BOTTOM AND FROM THE BEGINNING OF THE PROJECT TO THE END.NO SURPRISES"
- "are trustworthy and did a good job"
- "Customer asked us not to share his/her review."
- "MADE A GOOD JOB AND ARE VERY PROFESSIONALS AND I AM VERY SATISFIED FOR THE WORK THEY'VE DONE"
- "knew what they are doing and they make sure they do it well. I am very impressed"
- "did a quick and efficient job from start to finish their workmanship was outstanding"
- "PROVIDE EXCELLENT VALUE"
- "Customer asked us not to share his/her review."
- "OFFER GREAT SERVICE USING EXCELLENT PRODUCTS AND KEEP THE COST REASONABLE"
- "offer their customers with an incredible value proposition, which consistently delivers professional superior customer service, and most importantly, delivers outstanding results and with the highest professional quality results. Outstanding Results!"
- "seemed to do a good job on time, and were generally well organized. they also have a good reputation locally"
- "Customer asked us not to share his/her review."
- "DID AN EXCELLENT JOB AND THE PRICING WAS VERY COMPETITIVE"
- "good and professional"
- "provide excellent service and quality work"
- "Customer asked us not to share his/her review."
- "Have good prices and offer the most installation options."
- "complete their work timely."
- "Professional and good job"
- "Excellent roofer with the best warranty available."
- "can meet their needs"
- "the best roofer I interviewed and have the best warranty in the business."
- "completed the work in three day that would have taken an average crew a week to complete."
- "like their owner said, You can't please everyone, when their installers point fingers at the home owners for their poor workmanship!"
- "provide the type of service that people appreciate and expect."
- "are honest and very professional and concerned with end product"
Awards
GAF-Certified Green Roofer
This contractor has committed to recycle shingles from tear offs where available and operate business in an otherwise sustainable manner. Indicates that the contractor is committed to sustainable practices, working to reduce his/her company’s impact on the environment.
Installation Excellence Award
This award is for contractors that consistently install with a very high level of quality and provide their customers the highest protection that GAF offers.
Consumer Protection Excellence Award
This award recognizes those contractors that best protect their clients with system selling and enhanced warranties.
Training Excellence Award
This award is for contractors that are committed to training and continuous improvement.
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