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    Cornejo’s Builders

    3.1 (16 reviews)
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    Alexsander did an amazing job for me, I hired him for my project in Downey. He was very professional, clean, responsive and got the job done in a timely manner. As problems came up during construction, he presented solutions right away. He built from the ground a two-story apartment and converted a garage into an ADU. The cost of the construction was decent and the quality in material and labor was great. I would hire him again and I have been looking for other projects to do with him already.

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    Sterling T.

    I wouldn't recommend this builder for any remodel or ADU build. I'll take the time to break down why and help you understand my experience. Perhaps this will help you make a educated choice when it comes to any possible work you're hoping to achieve with your property when considering this contractor service. After meeting with several contractors I decided to use Cornejo Builders for updates to the backside of my house including working 1200 squ feet of pavers, updates to garage including putting in a toilet, drywalling, windows, and new floor, and also pool plans. Also a new slab front porch in-front of house. I paid his 350 dollar consulting fee which was promised to be takin out of cost of job (gimmick). It was spoken that I wanted to wait a few months to save some money for the job. So months after now that I've saved money I reach out and he asked me to send me a detailed email. I gathered photos and detailed drawings with measurements for him to see. I also spent a few hours writing out the detailed email with drawings to simplify and make the easiest understanding. After spending all that prep I sent email and got radio silence. I sent a few follow up text asking if he received email and asking if he was still perhaps interested in job = more radio silence. Finally I get a text back that he was on vacation. Then we talk some more, then again radio silence. This process going on for weeks and weeks.... Hearing every excuse in the book from food poisoning, another vacation, his venders where on vacation. List goes on with excuses. Finally he comes over AGAIN but this time with his father and they look at the scope of the project. All while telling me they want this project and are "motivated" which ofcourse at this point I was feeling doubtful. Then I get a proposal price for 1/3 the project and with things that where not spoken about. At this time I also discover he never looked at the email he asked me to put together. He says he will go back and look at email now. Radio silence again..... vender is somehow on vacation again. Then date of agreed project start time comes up. I asked if we are still on time and he responds yes. Then again radio silence for a week passing the agreed date of Project. I finally send my last text asking if he could please send the updated proposal and if we could include a time stipulation in contract because I have put a lot of my time in project trying to get it going and that we are past the agreed start time.. I get the response.... "Good morning sterling Unfortunately at this time we won't be able to help you and move forward with the project. I do apologize for the inconvenience. Good luck " So for those who took the time to read the detailed experience I had... this is what you could expect. Perhaps you may get lucky and catch Cornejo builders on a good day. You're gamble. I believe I deserve my consultation fee back out of good faith and being dragged through the mud with they're time being the only thing considered here.. Doubt they'd ever consider that. This type of ethos is what gives the view of contractors a bad taste in the general population of home owners mouths. Low bar, terrible communication, and not catering to the home owners experience and time. PS - Also, I am an economist for a living working in consumer indexes for market analytics. 2 weeks ago - They tried to lie and tell me the lumber prices and materials where still at pandemic highs regarding the pricing..... I'm here to tell you this is far from true. An absolute lie and attempt to gauge prices. Lumber is continuing to fall and is expect to be at 380.00/1000 board feet in 12 months time. Be careful out there! I chose not to give just one star because I believe if they worked in they're time management skills/ communication they could achieve better results and happier customers. The opportunity is there. The man is personable when present and could harness that in better ways. Thanks, Sterling

    a kitchen island with two chairs
    Jenna H.

    Cornejos Builders Inc did excellent work for my kitchen remodel project. I really appreciate Alex efforts in fulfilling my goals, not to mention I had fun working with the team who gave me excellent quality service and ideas for my project. I am extremely satisfied; not to mention the reasonable timeline to finish the job with no hassles. I wish Cornejos Builders Inc great success! I highly recommend Cornejos Builders Inc to anyone who is looking to get construction work done.

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    6 years ago

    I'm truly happy with my decision of using this company to do my home renovation. They are professional and punctual with the deadline.

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    Review Highlights - Cornejo’s Builders

    “Alex responded immediately, was punctual and patient in explaining the process.”

    Mentioned in 9 reviews

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    Drywall Repair Finisher - BEFORE:  I was worried that the plumbers cut the drywall so close to the baseboard that it wouldn't be recoverable.

    Drywall Repair Finisher

    (134 reviews)

    Update (September 2026): I reached out to Luis again for another drywall repair, this time after…read moresome drywall was damaged by a water heater leak. As always, Luis did a great job. He opened up the affected area and carefully checked for any remaining moisture before removing the damaged drywall. He then replaced the drywall and repaired the area, leaving everything looking clean and properly finished. I really appreciate his attention to detail and the quality of his work. I would definitely recommend Luis for drywall repairs and will continue to use him for future projects. His prices are always reasonable. Thanks again Luis for another job well done!

    I had a positive experience with Luis back in 2020 where he fixed a bad skim job by another…read morecontractor for me with a bunch of patches, and I thought Luis' skills were pretty superior. Over the years I have been doing DIY fixing of more bad spots around the house but I also work so I was never going to get around to all of it. I decided to call Luis back recently because I didn't want to do it myself anymore and I want to repaint fresh non-patchy walls. I hired Luis to reskim two bedrooms and two accent walls and some other miscellaneous spots that I added after he started working at my house. Luis was at my house for 3 half-days (1.5 in total) before telling me he was finished with the walls. I was (still) happy as a clam at that point and paid him in full for what was completed, fully trusting that the work was done skillfully based on my prior experience. (He was coming back one more time to finish the misc. stuff that I added on and I would pay for that part then.) Anyway, imagine my horror when I checked on his "finished" work and saw imperfections everywhere and tons of sanding dust still left behind on the walls, switches, and even mud on the door knobs. I'll let the pictures speak for themselves from here with brief descriptions of what's being shown. -Pictures 1-3: Some of the imperfections from the first time Luis said he was "finished." -Picture 4: His first fix-it visit(half day). He was supposed to find all the imperfections and patch them (the yellow highlighter spots), except he was patching bubbles with more bubbles. I had to patch all the spots again with my own compound and added a ton of other ones that he missed. Took me two full nights. -Pictures 5&6: His second fix-it and final visit (another half day). He was supposed to sand over all the patches and walls to leave them with a smooth & uniform finish that's ready for primer & paint. This was how I found them after he left. I sent him these pictures and told him to not come back as I had given him 2 chances to fix and he failed both times. There was no response from him. -Picture 7: I made only a partial payment of the balance on Luis' last visit because part of the remaining work was him making the corners of a ceiling overhang crisp, the corners are crisp but somehow the overhang is now squiggly when that wasn't the problem before. -Picture 8: I had taped up all my trims before Luis came as I didn't want any mud/compound to get on them, but I thought my crown molding were safe. They were not. He had busted them pretty badly with his electric sander in 7 spots and dinged them in at least 10 other spots but those were minor and I was able to superglue them back together. I did take on the repair of the major dings myself because I wanted to tape all of it up before he came back for more sanding. Luis and I had good rapport and I actually liked talking to him, but once the job took a turn for the worse, he never acknowledged that he didn't do a good enough job. He instead said things like, 1. "You're not supposed to look at the walls with a light from the side like that" and "I've never seen anyone look at a wall like you." --Yes, technically he's right, walls usually have paint on them which would have made these imperfections painfully obvious even when looking at them straight on, but until there is paint, this is how drywallers check for imperfections and fix them before they get permanently sealed with paint. (I had two painters (who also skim coat) come over for quotes and this was how they both checked to see how much prep work they would have to do before painting). 2. "I could fix these walls 10 times and something will still come up."--it really shouldn't if he did it right the first time, he's supposed to be a professional, not a DIYer like me. 3. "You've got to be kidding me. I'm at a point where I want to just refund your money and get out of this insanity"--after he came and saw all the patches I added to the walls (that he missed). I know what he was trying to imply and still gave him my electric sander to use so he could finish the job. With all that said, guess who is still stuck sanding the walls now after paying Luis to do the job and saying I didn't want to DIY this anymore. And with all these patches that I had to add to cover up his mudding imperfections/bubbles, it's looking like I'm going to end up with patchy walls again, which is exactly where I was when I handed Luis this project. What a joke. And the crown molding that I fixed up? That still needs to be repainted as well. I wasn't going to leave this review, but after several weeks and my walls still needing to be finished, I thought I would share my experience.

    Cornejo’s Builders - contractors - Updated October 2026

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