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    Efficient Construction

    3.2 (209 reviews)
    Open 8:30 am - 5:00 pm

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    Services - Efficient Construction

    Deck construction

    Guest house or ADU construction

    Manufactured home construction

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    Recommended Reviews - Efficient Construction

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    Painted front and back porch. Patched my electric panel . They were very courteous and cleaned up behind themselves. I would definitely recommend them.

    Michael R.

    Caesar did a great job. My roof looks great and the process was handled professionally.

    They gave retrofit new windows and did a great job. finished in two hours, professional, neat, great price , great customer service would highly recommend

    I wish you could've seen what it looked like before but very pleased how it looks now. Efficient Construction took out the old grass and put in new concrete. Everyone involved was pleasant to work with and very hard workers. Definitely satisfied and would recommend!

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    Ono V.

    Efficient construction doesn't wanna honor the contracts.They made with me for and adu. They wanted me to pay more after they efficient construction gave me the price for the job. The contractor named is Cesar told me, we have to renegotiate for more money if not to for get it. Why would I renegotiate to pay more money. If didn't like the price I can't just say I don't like the price it says in their contract, they will put a vein on my property.

    Beware of this company, Especial for "Roofing" they are doing the job not correctly then you on your own, they get the permit of my house on a difference roofing company's License C-39 and Efficient Construction only have General contract License, something is very wrong here! And the Roofer Carlos had been told me he is employee of efficient Construction. I have to hire a difference Roofing company to finish what they "screw up" and send them the bill, they fail to respond to me on my demand letter for the amount of money I spend to fix they screw up I and up to complaint to "California State License Board" and file a small claim to recoup my loss! Following is conversation of C-39 Contractor & Owen Corning Sale Rep & myself: Hey, Rolando, how you doing? It's Johnny What? Johnny, with Roof Bro. Oh, hey. Hey, come here. How you doing? I'm good, I'm good. Hey, I have a question. Um, I'm over here with a client. Uh, he just had it roof install on a couple of weeks ago. They installed the Owens Corning system and uh, but, uh, I'm trying to explain to him that, uh, like the way they did it, they have the soffits for intake. But they installed a rich fan and they installed O'Higgins and then they installed a solar fan. Okay. So, what happens to the warranty when you have all those 3 systems for exhaust? Are they all for exhaust? Yeah, they're all for exhaust. There're enough soffits for intake, but the exhaust is belonged to me originally. Yeah, that's okay. Yeah. Yeah, so if there's ever, um, anything with the shingle or any pollen with the shingle and it's due to ventilation, then that is where the warranty might be avoided. I'm not saying it is, but it might be voided. So, when you have different exhaust systems, it could complicate the ventilation system in the attic, because you would, so you're supposed to have only one intake and one exhaust. So, uh, or one type of intake which you do at the soffits, and then one type of exhaust, which you have, uh, three. at this point. So, what you would, what you could do is cancel some of them out and the exhaust? Uh, and then you should be able to have a proper airflow in the attic space. Okay. All right. Well, which one should I cancel without? It all depends on what you want. You could cancel out the solar attic van. You could, um, cancel out the O'Hagan, um, or you, that's how it's original. So, it all depends on kind of how you want to proceed. Can I have two? Can I can I have exhaust and uh... You could, you could have the attic fan and then one type of exhaust. The only situation that could occur is that when it rains or where there when there's moisture in the air, heavy moisture in the air, the attic fan could suck in some of that moisture. Um, because of uh, Because of the because of because of there being another exhaust system. nearby. So, it could suck in some of that moisture. So, you do want to be weary of that. So, and that's in times when it's about some rain or when it's raining, just make sure that the attic fan. does not turn on. They sell it so long. It's a solar. It's a solar. Yes, yes, yes. So, you just want to be cognizant of that, but at this point, just, you know, exit out, exit one of the exhaust vents out, whether that's the ridge vet or the Hagan. And you'll definitely have proper airflow at that point. So, if I, if I, if I take the O'Hagan now, that should be fine, right? Yes, yes, absolutely. Because right now, I still have the exhaust, uh, solar exhaust, and uh, Vent, and uh, Bridge vent. So, he's got the Bridge vent. The Bridge vent, Yeah, but the solar fan is like almost, it's really close to that Richmond. So that's going to trap some moisture, right? It's going to suck in some of the moisture. Yeah. Yes, that's correct. Okay. Okay. All right. So, it all depends on how you want to do it. You could cancel out the O'Hagan vents if you want to by putting a piece of ice and water inside the attic, or you could take out the whole thing and put shingles over it. So, it all depends how you want to process.

    My new roof

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    4 years ago

    Update - Following my review, the company sent a crew to patch up the cracked paint. Looks much better.

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    Page 4 of 6

    Ask the Community - Efficient Construction

    Has anyone received a call or visit from them after the rain from the last few weeks? Have they pointed out a problem with your house such as roof?

    I had my roof done in 2020. This year with the first rains in November the roof leaked. I contacted them we had someone come over to wait for them and no one showed up. We rescheduled and waited over 2hrs and when they finally showed up, the worked… 

    Don’t See Your Question? Ask Away!

    Review Highlights - Efficient Construction

    I was very skeptical at first, but after speaking with Mike Kim, I decided to take the plunge.

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    Gamas Painting

    Gamas Painting

    4.7
    (243 reviews)

    Miguel and his crew are just some of the most incredibly skilled and dedicated service…read moreprofessionals we have ever hired. We had the entire exterior of our house painted and it ended up being a lot more complicated than initially anticipated. Our house is quite old and a lot of the beams and sidings were not in good shape. Painting them involved replacing several sections or patching old work in order for the paint to adhere and look good. Miguel and his foreman expertly and independently solved each problem that came up, but brought options to me when necessary. Very clear and easy to work through. They really treated the work as if they were doing it for their own home. The end result is an incredible looking job that exceeded even my high expectations. We've received several compliments on it already. More importantly, the weeks it took to get there were completely painless -- pretty rare when speaking about services involving jobs like this. Miguel and his crew were friendly and reliable throughout. Made me have confidence in them for other jobs in the future. Highly recommended.

    We reached out to Miguel to paint the interior of our home, and we are so grateful for the thorough…read moreand high quality work he and his team completed. Miguel is communicative, polite, knowledgeable, helpful, and friendly Their quote was based on a walkthrough, so we knew Miguel was taking all the small details into account when we got his price. The quote was competitive and fair, especially the size of the job. The team finished the work just in time and we were back in our place right on schedule. A huge thank you to Gamas Painting!

    Efficient Construction - roofing - Updated August 2026

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