Bay Valley Roofing & Solar

★★★★☆ 4.2 / 5 (65)
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: 1820 Arnold Industrial Way Ste A, Concord, CA 94520
: (925) 705-7889
: https://www.bayvalleyroofing.com

Company Overview

If you need roof and solar replacement or repair services, you shouldn't just call any contractor. Look for a contractor with a solid history of assisting local homeowners. You want someone reliable who will arrive and perform the job with utmost skill. If this aligns with your expectations, reach out to Bay Valley Roofing. We proudly offer our top-notch services in Contra Costa, Alameda, and Solano counties.

Raul Diaz discovered his passion for quality installation early in life. He began to see the necessity for devoted and passionate professionals to help homeowners and businesses realize their dreams. By 1989, he had started a continuous journey toward perfection and ensuring client satisfaction. While his life evolved, the family commitment to quality was passed down to his children. Raul's son, Ryan Diaz, joined him in the work at the age of 12. By collaborating with his father, Ryan absorbed knowledge and experience from Raul's commitment and effort.

“Some homeowners choose to do some of the work themselves, either from experience or to save a significant amount of money,” they say. “We stand out as the only company offering three unique plans to fit any project needs. “We can oversee the complete design and construction process, or we can handle certain elements and allow the homeowner to take charge of the rest.”

Raul and Ryan Diaz emphasize the importance of letting clients decide the level of construction services they want. Some homeowners prefer to do some of the work themselves, either due to experience or a desire to save money, they mention. We are the only company that presents three different options to fit any project needs. We can design and build a project from start to finish, or we can manage certain aspects and leave the rest to the homeowner.

Bay Valley Roofing highlights the significance of customer service in every part of our business. Our top priority is to establish trust with our clients, and the best way to achieve that is by demonstrating our commitment to quality service, says Raul Diaz. From providing daily project updates to offering completion timelines, we strive to keep them involved in the process as much as possible.

Business Services

  • Roof cleaning
  • New roof installation
  • Roof repair
  • Roof replacement
  • Reroofing
  • Add solar shingles on roof
  • Solar system installation
  • Solar shingle installation

Business Location & Hours



Mon:7:30 AM - 5:00 PM
Tue:7:30 AM - 5:00 PM
Wed:7:30 AM - 5:00 PM
Thu:7:30 AM - 5:00 PM
Fri:7:30 AM - 5:00 PM
Sat:Closed
Sun:Closed

Recommended Customer Reviews

Rosalind F.
★★★★★

This company is incredible! The most professional, nice and considerate construction firm I've ever had the pleasure to work with and I hope to use them again. I've referred them to at least five neighbors in the few short weeks since they installed our new roof. They are thorough, well priced, on time and do an excellent job. Their crew is pleasant and very considerate, especially to our old dog who was so curious about all of them. They really are the gold standard of what construction companies should be - trustworthy and with loads of integrity.

J G.
★☆☆☆☆

Needed a repair. Had a good start, therefore I give one star. Got a receptionist to answer the phone and an appointment at least. Had to wait, but that was fine.
Greg came for an estimate; but never gave us one. Said he would email an estimate and never did. Emailed him and he never responded. Seems other yelpers had the same experience.
If you are not interested in doing the job; or can't-- just say so. Thats just common courtesy and good business practice. What a waste of time.

Rey O.
★★★★☆

I am very satisfied with their work. Dean Mouser have even exceeded what he drafted to the contract by taking extra mile to satisfy his client. Although not the lowest bidder, the team of Bay Valley Contractor knows what they are doing. I have a flat roof house with roof frame damaged from the weight of the clay tiles on mansard roof. Bay Valley Contractors fixed the damaged roof frame with their experienced carpenters, installed Gerard metal roof around mansard roof slope surfaces, and laid an 80 mil IB pvc membrane with dense deck beneath the existing foam on my flat roof for a reliable waterproofing. The white pvc membrane is an effective thermal heat barrier and the existing foam is for insulation. They did not remove the existing foam membrane on my roof because it does not show visible water damage or dry rot underneath the deck during inspection. My house is cooler during summer without running the AC and keeps it warm during winter. I am overbudget with this project but it is me who requested quality materials. I expected Bay Valley Contractor to deliver a quality work with quality materials because the roof is the most important part of the house and it must be done correctly right at the first time. I told Dean that I wanted my roof to last my entire lifetime. The pvc membrane have 25 years warranty and I am sure it will last way longer than that.

I should give them 5 star for their quality workmanship but only gave 4 because the project took over a month. This is due to some of the workers not showing up for few days and not hauling the garbage right away as it piles up during construction. No big deal since I do not entertain visitors in the house during construction.

I must also give credit to Jose, the metal roofer. He works very hard and loves his work. Very detail oriented person, takes pride of his craftsmanship and does his work alone in a 100 deg heat!

I will consider hiring them again on my next project.

C A.
★★★★★

After last winters heavy storms I discovered that I had a leak in my roof (caused by Dish Network installer going on my roof to install the satellite dish and breaking tiles by walking on the roof). Unbeknownst to me the tiles had been broken for years and after many years of being rained on the underpayment deteriorated to the point that the water came inside the attic and down to the upstairs ceiling inside the home. After about six weeks of trying to find a roofer and not getting any calls backs, I found Bay Valley Contractors. Ryan informed me they did not service my area and referred me to two other roofing companies and informed me that if I did not get a call back he would send somebody out. Needless to say the two roofing companies never responded to my calls. Ryan sent Dean Mouser out and he did a thorough inspection of my roof, took photos of the areas with damaged tiles and also found an area with dry rot. Because I have had other areas of my home where I have discovered that the builder used cheap products, I asked Dean if he felt I should replace the entire roof to ensure that I had a reliable roof. Because of my ignorance, Dean could have easily said yes and made me pay for a new roof but he was honest and explained that in spite the problem areas, my roof was in excellent condition. I was later sent an estimate for the repairs which I agreed to. After paying the deposit, an appt was was scheduled. The workers were on time the date of repairs - I came home for lunch and they were preparing to get started. When I returned after wrk 4 hours later they were done. There was no evidence that they had been at my home. They cleaned up any debris that was caused by the repairs. Needlessly to say, I was totally satisfied with the customer service and professionalism of everyone at Bay Valley - Ryan Diaz, Dean Mouser, Nancy Burger and the team that came out and completed the repairs. (It's hard to find companies that value and provide great customer service)

Dean also provided me with an estimate for solar at time he did the estimate for the roof repairs. While it is not the cheapest estimate that I have received, because of the great experience I had with Bay Valley, Dean's honesty and the fact that he didn't take advantage of me, I will be giving Bay Valley my business for solar.

Eva V.
★☆☆☆☆

I know this isn't much related to the work or anything but maybe your company should invest in cameras for your trucks. Today at around 12pm on hwy 24 I was on my way to work when one of your company truck drivers was doing who knows what on their phone that almost cost me an accident. He didn't look in his mirror or his blind spot, not even his turn signal was on and he pretty much cut me off really bad in which resulted me hitting my brakes like my life depended on it which it did and then after I had to quickly speed up because I had a semi behind me and I didn't want to get rear ended or possibly worse. Maybe you guys should talk to your workers about texting and driving and possible consequences if they do not follow through because nothing may have happened to me but someone else may not be so lucky.

Marjorie Ruth A.
★★★★★

Bay Valley Roofing has done a wonderful job on my 2 property's. The workers are very professional and curtious. And yes I would refer my friends and family to this great company.

Morry S.
★★★★★

Four years ago I wrote a positive review about Bay Valley because I was extremely impressed with their professionalism and the quality of their work. But, perhaps the best judgement of a company's quality is how well they stand behind their work. I recently had a problem with a gutter that didn't properly drain, and once again they did not disappoint. They responded promptly and fixed the problem. Although minor, it shows they value their customers. I highly recommend Bay Valley.

Matt A.
★★★★★

You know you have a complicated roof when 3 roofing specialist come out to quote u and never return. Too many peaks and valleys, big flat spots and way to steep...even a popular solar company declined to install solar.

These guys are the consummate pros...phenomenal work, on budget and on time....and of course....not a single leak...anywhere. Highly recommended !1

Mahesh R.
★★★★★

Great Guys.. Raul and team added a room to my house. Will go to them next time for sure when I need more work done.

Alex D.
★★★☆☆

The review I gave on 10-7-2016, which the owner said they did not do any work for me. Interesting, because that day they called me 3 times, emailed me. And made sure they wanted to work this out with me as soon as possible. My option is not to give a review because if I did, I would talk about what mistakes they made from the start of the operation and then apologized for their mistakes after the roof was installed. All structural components should be done prior to roof installation. Period. That is what an excellent roofer does, not after the fact.

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