About BuildZoom

Zoom in on the right home improvement contractor.
Simple. Accurate. Reliable.

BuildZoom has one simple purpose: To help you find the perfect contractor.

How we do this is more complicated. BuildZoom is a database of every licensed contractor in the United States. We work hard to figure out who the great contractors are, and who the bad contractors are.

BuildZoom combines license information on 3.5 million contractors with 70 million building permits, and over a million reviews from homeowners and the Better Business Bureau. If you are looking for a specific contractor and you can’t find them on BuildZoom, it’s likely that they do not have a license — please contact us and we’ll try to help!

Finding a Contractor through BuildZoom

The best way to use BuildZoom is to let us recommend contractors for your remodeling projects. Homeowners who hire through BuildZoom's free bidding system report high rates of satisfaction, and homeowners who research contractors online are twice as likely to be happy at the end of their project. If you hire a contractor through BuildZoom, that contractor is accountable to us. We can enforce standards of behavior, mediate disputes, and guarantee satisfaction. Read more about why hiring through BuildZoom is so effective.

Why should I trust BuildZoom?

We built this site to help people find great contractors, and to help people avoid bad contractors. We take this incredibly seriously, and we have a zero tolerance policy for contractors who don’t adhere to our standards. Our business depends on your trust, and your telling your friends about us. If a contractor does poor work, they will be blacklisted from getting future leads from us, and a negative review will be posted on their profile.

Other ways to use BuildZoom:

Here are a few examples. There a lot more ways to use BuildZoom. Please read this guide to the many uses of BuildZoom

  • • Browse the highest rated contractors in San Francisco
  • • Generate a legal contract to sign with your contractor
  • • View the biggest projects completed in San Francisco
  • • View the remodeling history of your home + neighborhood.
  • • Write reviews about contractors. We need your help!
  • • Ask a licensed contractor any question.

How does BuildZoom figure out what contractors to recommend?

First and foremost, we rely on the recommendations of our homeowners. 10 million people a year visit BuildZoom, and they give us a lot of information. If our homeowners have a good experience with a contractor, we increase the contractor’s BuildZoom score. If our homeowner has a bad experience with a contractor, we lower their score and will never recommend them again. In addition to feedback from our contractors, we look at the contractor’s license history, their rating with the Better Business Bureau, and their work history.

Analyzing 75 million building permits

We don’t just look at homeowner reviews to find great contractors. We need to know what type of work contractors do, and where they do it. To help with this, we’ve analyzed 75 million building permits to learn about the type of work contractors perform, how much repeat business they get within a neighborhood or at a specific house, the typical cost of one of their projects, and a lot more. We even look at the value of the houses they work on, and the income of their customers. We know exactly what type of work contractors are doing, whether it’s a huge custom home build, bathroom remodeling, restaurant build out, office tenant improvement, or small plumbing job. Our algorithms have consistently been able to use this data to identify the right contractor for any type of job.

The BuildZoom Score

Read about the BuildZoom score in more detail here.

Who is behind BuildZoom?

BuildZoom was founded by David Petersen and Jiyan Wei, who grew up as friends in Bethesda, Maryland and bring over 20 years of combined experience, building and managing data-driven companies to the table.

In 2011, David and Jiyan built the initial version of BuildZoom to solve personal challenges they both experienced with finding reliable home improvement contractors. They made their offering available to the public and before long, saw demand for their service increase dramatically.

In 2013, they moved to San Francisco and participated in Y Combinator Winter 2013 class. Shortly thereafter, they raised an additional round of seed funding lead by Formation 8’s Joe Lonsdale, the co-founder of Palantir, a mission-driven computer software and services company, specializing in data analysis.

Today, BuildZoom is headquartered in the SoMa district of San Francisco, working around the clock to achieve its consumer-driven mission of bring greater transparency,reliability and trust to the remodeling and construction industry.