Best Residential Construction in San Francisco CA

Nikoli did a great job for us. He was fast and professional.

Harry and Alex have gone above and beyond with their work. They are great at communicating when and where they will show up, what type of work they have been doing, and what you need to do going forward for maintenance if necessary. When I say they went above and beyond, I mean that my housemate accidentally blew a fuse on New Year's Day, and Harry and Alex were at the house within 15 minutes to identify the issue and fix it, and we haven't had any issues since then. It was incredible. They also handled a potential headache with the permitting office and got everything done quickly and with minimum work on my end. I love their professionalism and will be happy to hire them again.

Byron Tay responded the same day, came on time, gave me a very reasonable price, and did the job fast and with great care and professionalism - even though our house is an older victorian and the wiring is very complicated. We were so impressed by him that we asked him do to a second job while he was here. We had gotten many quotes, mostly ridiculous prices and/or requirements by the electricians (many of them unlicensed, by the way; Byron Tay is licensed, insured and bonded). Byron was no-nonsense, and kept to his word. We will hire him for any electrical job going forward.

they gave me a quote same day for a subpanel upgrade after sending them pictures — they then came out 2 days later and got the job done in a little over half a day with 2 guys. was very impressed with their efficiency.

Fantastic consultation, showing a real depth of knowledge on the cutting edge of HVAC technology, especially with regard to energy efficiency and decarbonization.

We hit a snag installing our new oven and Art was able to fix it in no time. He came recommended and was able to come out same day to reconfigure the outlet so it would work with the four prongs needed to power the next appliance. I would recommend him for quality work at a very reasonable rate.

Eddie is an electrical genius. He figured out the complicated problem right away, helped pg and e to solve it and saved us a lot of money. Absolutely amazing service.

It was nice working with Zoom Electricians. The one who showed up quickly to fix my outlet that was not working was very professional. He excellently did the repair I needed on time at a very high standard. I was so happy that you sent him to do the service I needed. Huge thanks to your electrician for exerting much of his effort. Highly recommended service!

Competitive rates, knowledgeable, friendly, and responsive electricians

Never showed up.... first time they said there was a work emergency, then he was going on vacation, so he was going to send one of his guys out. He scheduled another walkthrough and... he never showed up. I called and texted him to see what happened, he said he emailed me. Turns out they never had our email so lied about that, then even though confirmed via text and they never showed up he called me rude for being hesitant about rescheduling a third time. So I had to leave this review. Unfortunate.

Kevin was amazing - called me back quickly and ended up saving us $250

Fantastic! Very very helpful and knowledgeable.

Cosmos electric is the best when it comes to any electrical problem you have .

From small job to big job they have come to have my respect .
Mr Williams is a professional contractor he just did my whole House elecrical from panel upgrde to my solar panels .