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    Bay Valley Roofing & Solar

    4.2 (67 reviews)
    Open 7:30 am - 5:00 pm

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    Enjoying our finished room!

    When it comes to picking a construction company it boils down to two questions really. What is the quality of their work? Are they fair and responsive to customers? Bay Valley earns five stars from us on both accounts for the job they completed at our house. Here is why... We accepted the bid from Mr. Raul Diaz because we appreciated his candid, transparent communication about costs. We had been warned that construction companies often execute multiple surprise change orders to increase their profits throughout a job, but this never happened with Bay Valley. The one increase in cost that was unexpected was understandable and due to observable issues with our electric system infrastructure. As Mr. Diaz had initially promised, we stayed on budget throughout the job. The quality of a company's work is the end result of many small choices. We were both present during the entire job. We watched each step of the way and saw that all of the lines were perfectly straight, and everything was made perfectly level at each step of the way. One of Bay Valley's greatest assets is a finisher who does meticulous work. He came in to put the finishing touches on the flooring, every single door, the molding around the doors, the aprons for the windows, and the finishes for the bathroom - all done perfectly. Bay Valley also worked with subcontractors who held similarly high standards - Baltodanos for texture and taping of drywall and S.Y. Electric were both top shelf companies that did excellent work. In the end everything was done beautifully. We are 100 percent satisfied with how everything turned out. Also, this is important, because living in a house throughout a major construction job is an inherently stressful process. Never once did we witness any argument between anybody on the crew or with any of the subcontractors. Everybody worked cooperatively together with capable leadership and helpful communication from John Piermattei. Mr. Piermattei was wonderful to work with throughout the process. He was fair minded and a great communicator. For example, he warned us that there would be a lot of dust and then put up several high-quality dust shields that prevented nearly any dust from getting into the rest of our house. I noticed that the entire crew was really professional in the small things as well. For example, the worksite was always kept clean and organized. They never left over a weekend without putting their tools in a corner of the room in a neat and organized way and sweeping out the room. Every job will have a setback or two - this we accept as inevitable. Like any other job, this happened during the process. Here's why I mention this - you cannot know how a given company will actually treat you until you have a setback. The way that Bay Valley handled these setbacks was evidence to me that this company is dedicated to being decent, fair and reasonable with its customers. They communicated clearly with us and resolved each of the two setbacks in a way that left us feeling respected and treated fairly. Our understanding is that Bay Valley is transitioning to becoming the Bay Area's Premier roofing company. They will now be working on installing solar panels that are part of roofing systems in affiliation with a high-quality product made by GAF. We feel very fortunate to have been able to work with them before they made this transition. They made a beautiful room extension for us. If future customers have roofing needs or want to install these kinds of solar systems, we highly recommend Bay Valley as a company that is run with integrity and very high standards. 5 stars from us!

    Rafi R.

    We just finished our home's expansion (a very complicated project) done by Bay Valley Contractor's back in July. This was a not that so easy project. Both Bay valley contractors management and their staff member did a great job with excellent result. First of all they treated our home as their own home and were cleaning after themselves every day they finished their work even we didn't lived there during the construction. They were on top of things the whole time during the planing , permitting and construction process. It was a pleasure working with Both Raul (owner) and John (Manager, Forman) the entire time. Looking forward to work with them on the next project and enjoying some return costumers discounts from them.

    Photo taken a week after the roof replacement completed
    Michelle L.

    We've hired Bay Valley contractors for a couple of roofs. We had good experience in the past however when we hired them for a roof replacement this April they did a sloppy job. - Ugly stucco patch. A couple of neighbors even came to tell me that "your roofer did a terrible job with your wall, are you going to repaint?" - When they took down the old gutter a bit of wall damage occurred. They should have painted the exposed stucco before adding the new gutter but they didn't. Now it's very hard for us to paint the stucco to avoid water damage without taking those gutters down! - They left a huge mess in our attic. I didn't know about it because they picked up in the yard. When my electrician told me that our attic is covered in roofing debris I couldn't even believe it. He said the roofer should have protected it with a tarp and it's unusual that it's left so dirty. I uploaded the photos my electrician took to show me, but it's actually worse than the photos can show. - They also left roof debri in the gutter, which can clog our new gutters - The estimator gave us a verbal estimate on lifting the solar panels (by a third party provider) but never provided us a written contract, until the day before the take down. They called and said the solar take down would be $6000 (in addition to the roof replacement charges) instead of the $3000 that we were told before. With this change we decided to evaluate other options including getting new solar panels. We wanted them to inform us the exact cost of the different sizes of the solar panels in order for us to decide, but they said "You just need to tell me that size of the panel you want. Our workers are ready to start the job and you have to decide now!" without even telling us how much it would cost. We were firm that we are not starting the job unless we know how much will have to pay, and finally an hour later we received the solar contract in the email. The solar part was done by a third party but the estimator of Bay Valley recommended the provider and was supposed to coordinate for us. It could have been much less stressful if he didn't wait until the last day to tell us about the big price change. Although the review on the company is overall negative, i would like to mention that the owner Raul had been extremely professional and courteous as usual. Maybe it's just hard to maintain the quality of the crew with the expansion of business.

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    Page 1 of 2

    Ask the Community - Bay Valley Roofing & Solar

    Review Highlights - Bay Valley Roofing & Solar

    When what I thought was a pretty standard roof job got complicated, Jose, Raul, Dean and team never blinked.

    Mentioned in 20 reviews

    Read more highlights

    Ambrose Solar

    Ambrose Solar

    4.7
    (279 reviews)

    My husband and I dug in our heels FOREVER, when it came to getting solar. There were all kinds of…read moresalespeople who came to our home on a monthly basis, and we just never had a real peace about being able to trust what we were being " sold", or told. My parents purchased solar from a HORRIBLE company that sounds a lot like 'SunFun'. After they passed away, and the house was sold...we were STILL making the monthly payments for over a year!!! That SunFun organization REFUSED to transfer the solar to the new homeowner, and eventually stopped taking or acknowledging our calls. It wasn't until we had to threaten the new homeowner with a lawsuit that SunFun finally transferred ownership. Due to this, we could not trust any of these solar companies...that is, until Kevin Bedard came to our home, and explained everything in great detail to my husband and I. He took the time to hear about our concerns, and he showed us how he truly cared. That same week, we spoke to two other families who shared their positive experiences about Ambrose Solar that made us feel that we would be in great hands. We had FINALLY FOUND A PEACE about getting solar on our home; KNOWING we would be in good hands, and we were ALL IN. It's been six months now, and we are beyond pleased with our solar panels, and the two Tesla batteries we have purchased. We are true fans, who have NOTHING but RAVE REVIEWS for this company. If you don't have solar, or if you need to add solar, Kevin Bedard is your man! and Ambrose is your company. Every employee has been amazing and helpful. In a world where customer service has taken a dump, this company has remained a class act. So again...if you are considering solar, call Ambrose, and tell them Albert and Rhonda sent you.

    My project is now finished and it's been about 6 months turned on and functioning- I'm still so…read moreglad that I did this with Ambrose Solar. Any home renovation project has bumps, and this one had its fair share: after initial install they monitor the systems production remotely to see if it's doing what it's supposed to/expected to, and my system was initially under-performing. They caught it and sent out a team to problem solve it, which took a couple tries, but they didn't drag their feet, they kept on it and kept at it and got it resolved. It was no fault of theirs, just a technology glitch. Core fear was that they would give up after a couple failures and leave me following up with them to get it done, but I never had to worry about that. I also did not end up liking where they placed the control box- it was something that was going to make future maintenance of my house trim problematic down the line. They willingly moved it up a few inches for me (and my only complaint was the team that did that didn't patch the original hole as efficiently as they should have. If I had understood the box placement better on the first pass that would never have happened, so this is a bit of a complaint of my own making.) Jon Landsman, who sold me the system, stayed with us the whole time tracking the project, checking in, and following through on every detail, every question, every concern. He never made me feel like the demanding diva that I am, was always prompt and gracious! The bottom line is that start to finish, even with a few bumps in the road, I have zero question that this is a company that legitimately cares about doing what is right. The culture of deeply valuing customer service that they have built is unmatched by many businesses these days. I am SO pleased, and SO impressed, and I can promise that you will be too!

    NorthStar Solar

    NorthStar Solar

    4.8
    (122 reviews)

    We can't say enough great things about our experience with our solar installation from Northstar…read moreSolar in Danville. From start to finish, we were so comfortable with every individual we interacted with. Our salesman, Patrick was no pressure, extremely helpful and very responsive. Danielle in the office was a joy and our project manager Jason was there for us all along the way. The install crew was phenomenal and completed the entire project in two days. We absolutely love having battery backup especially from 4 to 9 PM when PG&E charges the highest peak rate in the Continental U.S. California has the second-highest electricity rates in the U.S., (only behind Hawaii) which makes receiving power from the sun especially rewarding. If you are considering solar power, we highly recommend giving Northstar Solar an opportunity.

    Wow, I cannot say enough good things about Ryan and his team! I hired them to remove our 69 solar…read morepanels and reinstall them after a re-roofing of our home. It's a nerve wracking process but Ryan gave me reassurance things would go well. Upon Ryan's recommendation, we also decided to replace the solar panel racking system installed by Sunrun because we were plagued with roof leaks due to improper sealing of their footings. Ryan and the Northstar team were absolute champs at removing and reinstalling the new system for us. Everyone we dealt with was so professional, kind and easy going. The work was beautifully done and based on all the photos and detail provided by Ryan I am confident we will be safe from leaks going forward. He also had to coordinate the reinstall with our roofer and everyone handled it so well. I 100% recommend Northstar and the team for this task, and also wouldn't hesitate to hire them for roofing based on their strong work ethic and product with our solar project. The price was fair and in line with other quotes I'd received. A couple of questions unrelated to this particular job have come up and Ryan has gone above and beyond to help me out by providing his professional input. So happy with these guys. Thank you!

    A Better Roofing Company

    A Better Roofing Company

    4.9
    (93 reviews)

    If there was a rating higher than five stars, I would give it! From the start, Nader, Brett and…read moreBraeden turned an experience that we were dreading into a pleasurable one. A year ago, we had installed a new roof using a different roofing company, and within a few months noticed problems in the materials and the workmanship. Long story short, there was a manufacturer defect, and we needed to redo the entire roof. Thankfully, the roofing manufacturer covered it under their warranty however I was able to look for a new roofer to install our new replacement roof. Having not been happy with our original roofer, I interviewed at least a half a dozen more companies and came across a Better Roofing company. Boy am I glad I did! Once they heard about our roofing fiasco and the need to have a new roof replaced within a year, they went above and beyond to not only help us through the warranty process, they went above and beyond on workmanship, installation, cleanup, and professionalism! Their crew was beyond reproach, and treated my home as if it was their own. I cannot say enough, good things about the quality of the workmanship, the attention to detail, and their refusal to cut corners. Our job was a large one, with a steep pitch and complex roof lines and Robinson and Oscar (two of the main crew foreman) were meticulous in their attention to detail caught things that our previous roofer had missed. I can say with certainty that this company will provide you a level of service in which you will not be disappointed! I wish I owned a second home just so that I could hire this company again!

    We hired A Better Roofing Company to replace our roof, and the entire experience was excellent from…read morestart to finish. Nader was professional, responsive, and accommodating to our needs throughout the project. He also went above and beyond to help us after we had problems with our previous contractor, and we truly appreciated his support and guidance during a stressful time. The installation crew was punctual, efficient, well-organized, and kept the work area clean. Our new roof looks fantastic, and we couldn't be happier with the quality of the work. We highly recommend A Better Roofing Company and Nader's team to anyone looking for reliable, honest, and high-quality roofing services.

    Bay Valley Roofing & Solar - roofing - Updated August 2026

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