21st Century Home Improvement is a licensed, insured, family-owned contractor in San Francisco with 30+ years of experience. We specialize in waterproofing, seismic retrofitting, ADUs, painting, roofing, siding, and window replacement. We also handle remodeling, carpentry, and decks with quality craftsmanship and transparent pricing. Trusted across the Bay Area since 1993. A+ BBB-rated. Lic. #682929.
Website: 21stcenturyhomeimprovement.com
Phone: (415) 423-0249
Cross Streets: Near the intersection of Mississippi St and 17th St
Open now
- Wed 9:00 AM - 4:00 PM
99 Mississippi St San Francisco, CA 94107 ·2344.30 mi
Merchant Verified
Reviews
yelpI was searching for 21st Century since I lost the business card from work I had done several years ago and came across their yelp page. I would have to say that I am very surprised to see their...
MoreDo not recommend, waste of time. Called, told me they did vinyl siding repair. Scheduled time. They came out to take a look. Spoke about the approach to repair. Was told will send me estimate....
MoreThe only reason to use this company is If you want to have unexpected, costly, redos. We used them for several projects. The first few had problems, delays, crew replacements, etc. but we always...
MoreThese folks do it all. Replaced dry rotted deck beams in the back; repaired and painted the front mini deck; replaced the kitchen counter tops, sink, and floor; installed new indoor staircase...
MoreGlad I found out how to search for permits online in order to find out the name of this company. My neighbor did not want to release the name to me previously because the work was of such poor...
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