Grades contractors mostly on hard public records (licenses, permits, BBB), but the same contractors pay BuildZoom a success fee and their on-platform activity feeds the score that drives placement, so the ranking is not arm's-length.
What it's really for A contractor-matching marketplace; it earns a success fee on matched projects.
What our grade covers The grade on this page is about its contractor scores and matches from permit data, not everything the site does.
Medium Scoring Confidence Mostly sourced, but a detail or two still needs a primary source, so the grade could shift slightly.
Contractors are the paying side (a ~2.5% fee on jobs won, billed only after they're hired); BuildZoom's own docs say the score sets the contractor "batting order" and display order, and participation can raise it, though it states placement isn't a flat purchasable ad slot.
Source →- Operating since
- 2013 (13 years) · source
- What it costs you
- Free to read The reviews are free to read.
- How they make money
- BuildZoom runs a contractor-matching marketplace that earns a referral/success fee (commonly cited around 2.5% of project value) charged to contractors only after they win a job, plus connection fees and data-licensing revenue.
- What they do
- It aggregates public license, building-permit, and BBB records plus user reviews to score, rank, and match licensed general contractors to homeowners' remodeling and construction projects.
- What to watch for
- By BuildZoom's own disclosure it won't publish the exact scoring weights ("to prevent gaming"), and a contractor's participation and reviews from clients who hired through BuildZoom feed the score that "controls the order in which contractors appear," so the public ranking is entangled with paying customers' activity rather than independent of it.
- Composite score
- 2.70 / 5.00 → grade C+
How the grade was reached
Does the site take money from the very entities it ranks? Pay-for-placement, vendor-funded data, and affiliate commissions all pull this down. The less the ranking can be bought, the higher the score.
What is the ranking actually built on? Hands-on testing scores highest, then verified first-hand reviews, then opinion or popularity surveys and self-reported figures, then pay-to-rank, which scores lowest.
Is the methodology published, specific, and reproducible? Can a reader see how a given rank was reached, or is it a black box?
Are commercial relationships, sponsorships, and affiliate arrangements disclosed clearly and near the rankings themselves, rather than buried?
How hard is it to game? Controls against fake reviews, solicited reviews, and vendor gaming raise this; an open box anyone can stuff lowers it.
Evidence
- BuildZoom was founded in San Francisco in 2013 by David Petersen and Jiyan Wei; in November 2025 it was acquired by Block Renovation, which now owns the marketplace. Source: PR Newswire - Block Renovation Acquires BuildZoom Marketplace →
- BuildZoom charges contractors a 2.5% commission on jobs earned, not for leads or placement: 'you only pay if you're hired. You'll be charged 2.5% on the total amount of the job.' Source: WebFX - Is BuildZoom Worth It for Contractors? →
- The BuildZoom Score weights license status and verified/permitted work history highly, plus reviews and contractor participation; the score 'controls the order in which contractors appear' and BuildZoom states it does not disclose the specifics behind the formula to prevent gaming. Source: BuildZoom Answers - How does the BuildZoom scoring system work? →