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    PrefabADU

    5.0 (2 reviews)
    Closed 9:00 am - 5:00 pm

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    Eduardo Diaz

    Eduardo Diaz

    (1 review)

    We hired Eduardo Diaz (Diazco) to build a garage and extend our driveway. I will start with the…read morepositive, the end product was mostly good quality. However, he is poor at communicating with his client, insists on making decisions himself that should be done in conjunction with the client and will not always conduct himself in a professional manner. He failed to show up at the job site some days and one day showed up when he was not scheduled to. One day his crew packed up and left the job site at 1:00 PM with no explanation. Turns out he had not ordered enough lumber but never told us. This left a wall incomplete that needed to be finished for the electrician the next day. Only after our complaints did a carpenter return with more lumber and finish. We found out (by questioning him) that he intended to take it upon himself to pick the design, quality and manufacturer of our windows and doors with no consultation. Due to my wife's health and the need to secure an aggressive dog, we had to insist on no work before 8:00 AM. I found out (only by questioning him) that, in defiance of our firm requests, he had scheduled a concrete pour at 7:00 AM the next morning. His solution to me asking "Why did you approve this" was to call me, lose his temper, yell at me over the phone and threaten "standby fees" be added to my bill.

    From the owner: Design, Engineer, Build, Construction Management, Real Estate investment, Real Estate Portfolio…read moreManagement. Pre-Construction administration - Permits.

    Valley Home Development - Before construction

    Valley Home Development

    (13 reviews)

    Believe every single negative review you read about Valley Home Development…read more Steve and Nikki Vallejos, along with their salesman Daniel G., sold me on an advertised 90-day turnkey solution. "Construction to occupancy in 90 days" as stated on their website and documentation. The reality was that eighteen months later the ADU finally got completed. Even factoring in very tail-end Covid related supply chain issue there's no excuse for such a gap been expectation and reality. But then again when no-one shows up to work for 4-5 weeks at a time, what do you expect. Bottom line: You should question any timeframes and deliverables they present to you, even if you are only planning on buying one of their DIY kits. Here are just a few of many examples of how Steve and Nikki operate aside from the extreme misrepresentation of their fictional 90-day turnkey solution: They sold me upfront on a comprehensive express warranty from 2-10 Home Warranty. This warranty was never delivered despite my efforts to get Nikki to respond. She communicated that she was following up with the 2-10 warranty people for status (implying that she had already submitted the paperwork), but I subsequently confirmed by talking to a 2-10 representative that neither VHD nor Nikki submitted any application for our warranty. I'll let you be the judge whether or not you should expect VHD to fulfill any warranty, express or implied. They were attempting to line up an unlicensed electrician to work on our ADU. I put a stop to that before any work was done. Sorry, but having a business license (which he did) is not the same as an electrician license (which he did not). Not to mention extremely bad form, to put it lightly, as a general contractor to not properly vet whether or not your sub-contractor is properly licensed. Long story short, after a subsequent electrician hiring blunder by VHD we ended up getting our own licensed electrician not only to ensure we had a licensed electrician doing the work but also to ensure a quicker timeline to completion. Steve and Nikki are changing their business model to attempt to move away from the construction side of the business. However, you'll note on their sales/marketing website (that goes by a different name than Valley Home Development) they list themselves, VHD, as a construction partner so nothing is really changing. Steer clear of Valley Home Development! Note: There is a glowing 5 star review right here on Yelp from a David D., and apparent very satisfied customer. However, it looks like he's actually one of Steve and Nikki's partners as his company is listed on their partner page.

    I ultimately got an ADU for a reasonable fixed price ($225K), but I wish I had never worked with…read moreVHD Construction. It took 5x longer than promised. The people that own and run this business (Steve and Nikki) were terrible to work with. They were terrible business managers, were not transparent, didn't manage expectations (or set false expectations to make the sale), and provided terrible customer service. They also didn't own their glaring mistakes, of which there were many, never apologized, and don't appear to be learning and getting better, which seems confirmed by consecutive years of terrible reviews. If you go with them be sure to get a lawyer, put penalties into the contract for non-performance and delays, and beware!!! The list of mess ups is too long to detail, but a few things I'd call out is that it took them 20+ months from signing the contract to complete a tiny 392 sq ft ADU. They struggled with cashflow the entire time, didn't have enough workers and sometimes even brought out unqualified workers, mismanaged the permitting process (missed key deadlines and had to re-apply), asked for payments before milestones were met, made some glaring design mistakes (put sewer pump by front door), etc. Fortunately, their on-site contractor Fausto and his hands-on builder brother Esteban were fantastic, honest, friendly and professional, and did everything they could to get the job done and done well, in spite of their bosses who hamstrung them. Final result is solid. If Fausto ever goes out on his own - hire him!!! Or if you run a building company hire him away from VHD.

    Davis Pro Builders

    Davis Pro Builders

    (21 reviews)

    Davis Pro Builders did a great job on our bathroom remodel and made what could have been a very…read morestressful process as pleasant as possible. Brandon handled some frustrating permitting issues with the city for us and kept our project moving smoothly. He listened to our design ideas and offered suggestions as well; he was very upfront with us about costs and made sure I understood the potential impact on the budget if I requested changes to our plan. Davis Pro Builders is excellent to work with -- I have recommended Brandon to a number of people already and will continue to do so. Our remodel was completed a little over a year ago, and everything still looks fabulous and is working perfectly.

    Prior to hiring Brandon I received quotes from other companies. Brandon was competitive on price…read morebut stood out from others as he used top quality products and the other companies wanted to use run of the mill materials. My guess is the other companies wanted to maximize profit. I have used many contractors in the past and have previous experience in construction so when Brandon relayed to me he wouldn't use subcontractors and would be on-site when he said he would I was surprised and relieved. Brandon also took the time to prep our bath remodel area to minimize dust and debris throughout the rest of the house. His attention to detail and not rushing product drying time between steps was something I was worried about but watching Brandon work step by step put my worries at ease. Brandons input and suggestions to both my wife and myself was not overbearing. He was clear that his previous work and ideas were merely to get the wheels turning without pressure. Additionally, I really appreciated the detail in the tile work. He aligned the drain, shower niche, shower tile, and floor tile to where it all flows together. Grout lines are smooth and line up perfectly. The overall experience was a positive one and I have no complaints. We have future construction coming up and I can tell you I will not get estimates from anyone else as Brandon is the go to, honest, and easy to work with guy.

    A+ Construction & Remodeling ADU Builders - ADU

    A+ Construction & Remodeling ADU Builders

    (149 reviews)

    My husband and I started planning to build an ADU for my mom after she retired. We wanted her to…read morelive near us, but have her own space with her own privacy and comfort. We interviewed a few construction companies and felt that A+ Construction PRO was the best choice for us. The project itself was a detached 1-bedroom ADU in our back yard. The process was so much easier than I expected. Rod presented the development process and details in a very realistic manner. He didn't make any false promises or try to sell us on lots of unnecessary upgrades. The design phase of the ADU took a little time to come to completion because my mom continued to modify the floor plan and the finish out of the kitchen as we moved through the design phase. The team was very patient with my mom and helped us to come up with a design that best served her needs of her space. I like that they paid close attention to the practicalities of the bathroom and the storage in the unit. I think designer Irene did a great job in this area. The crew was very professional. The site was always cleaned up after each workday. Communication with the office was good throughout most of the construction process. One minor thing that impacted the project was the typical delays that there are with inspections. But this was not a problem for us as we were always made aware of when each inspection was scheduled and any resulting delays. My mom loves it and ADU honestly turned out better than I could have imagined.

    My family hired A+ Construction to convert our garage into an ADU. Since we hardly ever used the…read moregarage and needed additional living space so much more than storage space, it was a no-brainer for us. The finished ADU is being used by my younger brother while he is in college, and it has turned out to be a real small home for him instead of just a small addition to our house. The folks at A+ were very forthcoming in their bid process and told us what to expect. As opposed to some of the other contractors that gave us a very general number that could change depending on when they got around to it, A+ spelled everything out for us and gave us a solid idea of what our garage conversion would cost. Our project manager Nick was pretty accessible before construction started and even more so once the work began. He was pretty prompt in returning my mom's calls. I also liked that the construction crew was consistently on site. I've heard of a lot of other contractors leaving a job to return days or even weeks later to complete more work. That didn't happen here. The finished ADU is very clean and modern. The mini-split is very functional. The insulation added to the garage is very noticeable on the hotter days and the completed ADU is very spacious and never feels closed in. All in all, we had a pretty good experience with A+ Construction, and we would likely hire them for future projects.

    Good Guy Builders - Gorgeous bathroom with a wet room and access to the outside for a "shower in the nature" aesthetic.

    Good Guy Builders

    (25 reviews)

    I am more than happy with my choice to go with Good Guy for my little home salon studio. They…read morelistened to what I wanted, double and triple checked on even the smallest details to make sure it was completed the way I wanted, and even made some helpful suggestions that I hadn't even thought of. They were on it. Since they have carpenters, mud and texture guys, electricians, plumbers, HVAC, you name it, They would send who needed to be here at what time to make the process as speedy as possible, showed up when they said they would and worked until the project was done! Everyone who was sent out was very friendly and respectful, also leaving my place clean when they left for the day. I would receive almost daily logs of who was here from what time to what time, reports of progress including photos and estimations of percentage of each piece that was left to do, and how close we were to the projected estimate. Everything turned out beautiful and works perfectly for what I wanted to use it for. I will definitely be calling them in the future with any and all construction needs. Thanks Good Guys!!

    I hired Mark for a medium-sized remodeling project (about 6 weeks) . He provided a low estimate…read morecompared to other bids. He then said that his workers were all covered by Worker's Comp, among other benefits, and that he paid a fair wage, and that he was the most ethical contractor in the industry, resulting in his workers' being highly productive and efficient leading to shorter project times. This sealed the deal for me. Furthermore, he claimed that the extra 30% or so that he was billing for his workers, was due of the worker's comp insurance, which only he provided to his workers (as opposed to the many unscrupulous other contractors that were around). As a property owner, you could be held liable for workers' injuries if the contractor did not carry worker's comp, and so, I agreed to Mark's deal. Within a few days, Mark had exceeded the estimate he had quoted, and was very difficult to get hold of. Furthermore, his workers would come and go at all times of the day (between 7:00 am and 8:00 pm) and I simply lost track of how many "cooks" were in the kitchen. As of last count, I noticed some 15+ names on the invoices, and some would appear for a couple of hours, and then disappear. But Mark would send me invoices claiming that his workers spent the entire day at the property - which was simply untrue. Mark would not be interested in even listening to me or investigating my grievances. Instead, he would brag that he did me a big favor by accepting my project, and that he typically only did multi-million dollar gigs, and not pittances like mine. Long story short, the project budget exceeded the estimate by more than 100%. Mark became extremely aggressive and feisty, and it was impossible to work or reason with him. I hired a Private Investigator to find out who this person really was -- like a Dr. Jekyl Mr. Hyde. Turns out that he had been sued for fraud, but more importantly, the whole worker's comp, fairness, ethical contractor, and so on, charade, was ALL ONE BIG LIE. It also appears that Mark may have left the Better Business Bureau due to bad reviews and that he may have hired a reputation defending company to increase his Yelp reviews to 5 stars by questionable tactics. Good Guy Builders license has been suspended for Worker's Comp violations and is under investigation. After my PI reported this, I found on the CSLB site: "License is under suspension for failure to comply with Workers Comp. A workers´ compensation certificate or exemption statement may have been received by the Board but not yet processed. Once the certificate or exemption statement is processed the suspension will be lifted retroactively to the effective date of the certificate or exemption statement. Ask the contractor for proof of worker's compensation and contact the insurance company to verify coverage." Here is the URL: https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=1016932 Please see image below. This is one of the greatest betrayals where I was charged an arm and a leg, and told a romantic story of workers being taken good care of, and so on, all the while, when Mark was simply pocketing the money that was supposed to cover his workers' safety and well being. Such greed, deception, and dishonesty, in my opinion, does not deserve a second chance. You decide whether you want to hire this company and deal with Mark. --- Addendum to Mr. Santosh R's note: 1. I am a real person. I was threatened by Mark that I would be sued if I posted anything negative on Yelp. 2. Yes, I did edit my posts before finally settling on one. Anyone in my position would do the same. 3. Finally, the facts remain unchanged. Good Guy Builder's license is under suspension and this may be independently verified on the CSLB website (see link). Likewise, the lawsuits against them may be independently verified. People like Santosh and Mark are the real culprits who boost their yelp ratings in a manner that skews it in their favor - by attacking anyone who posts negative reviews, and threatening those in dispute with defamation lawsuits. Do not believe anything Santosh or Mark say. The suspension is more than ample evidence that Good Guy Builders is a crooked business and not one that you should be patronizing.

    Mark Scott Construction - Marc Scott replaced my damaged floor, installed new kitchen counter, new windows, sink and beautiful cabinets.

    Mark Scott Construction

    (36 reviews)

    We recently faced significant water damage (refrigerator leak) that ruined the hardwood floors in…read moreour dining room and some of the kitchen cabinetry. With the aid of our insurance company, we decided to have Mark Scott Construction to do the repairs. Vince Curtis, our project manager, and his construction team exceeded every expectation. From start to finish, their professionalism, attention to detail, and commitment to quality were nothing short of excellent. The entire process was handled seamlessly -- from Chad Jocson coming out to assess the damage, to Derik Watson finding the perfect match to replace the damaged original hardwood floors, to Lorenzo fixing and reinstalling the cabinets, to the team that did the painting, clear coating, and reinstallation of kitchen appliances - all before the Holidays. We were especially appreciative of their respecting our time and their punctuality during this project. The craftsmanship was flawless, and Vince kept us informed every step of the way. The final walkthrough with Vince went smoothly as the floors and cabinets looked as though we never had any water damage in the first place. Again, thank you very much to Vince Curtis and the rest of the Mark Scott Construction team for getting our home back in order. If you need a reliable, skilled construction company that truly cares about delivering exceptional results, look no further. Highly recommended!

    I had a wonderful experience with Mark Scott Construction! After a house fire, I had a full rebuild…read moreof my kitchen and dining room, new pantry build, new laminate floors, new carpet, new paint, and many other items throughout the house. Vanjo was a joy from the start. Super kind and attentive. Always available to answer questions and keep me updated on timelines. His team was quick and very nice as well, as I met a few of them when I stopped by. Vickie in the office was kind and patient while waiting for funds from insurance and the mortgage company. I would absolutely work with them again. Thank you, team!

    PrefabADU - homedevelopers - Updated May 2026

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