The "trust bar" - that strip of logos or numbers right under the hero - is the most contested 200 pixels on any local business homepage. We ran a four-week A/B across nine client sites in summer 2025 to settle three internal arguments. The results were uncomfortable.
The three variants
- Logos: 6 logos of past clients or accreditations (Gas Safe, NICEIC, FMB, etc.).
- Numbers: three big stats - "287 jobs completed", "4.9★ on Google", "12 years trading".
- Reviews: two live Google review snippets, rotated every 8 seconds, with the reviewer's name and a small star count.
Every other element on the page was identical. Test ran on local web design builds for two plumbers, two electricians, two roofers, two builders and one landscaper, across the North East and Greater Manchester.
The headline result
Aggregated across all nine sites, the Reviews variant won by 18% on form fills and 9% on tap-to-call. That was not the result we expected - we'd backed Numbers internally before the test.
But the aggregate hides the interesting finding: the winner varied massively by trade.
Winner by trade
- Plumbers and electricians (emergency-led): Numbers won. Specifically the "average response time: 47 minutes" stat. Customers in a panic want a number, not a quote from someone they don't know.
- Roofers and builders (considered purchase): Reviews won decisively. People making a £6,000 decision want to read what a previous customer said, not see how many jobs you've done.
- Landscapers and decorators (aesthetic-led): Logos won, but only when the logos were accreditations (FMB, RHS) rather than past clients. Past-client logos felt like name-dropping.
The trade dictates the buying psychology, and the buying psychology dictates the trust bar. There is no universal winner.
Implementation details that mattered
The Reviews variant only worked when the reviews were:
- Real and current - pulled live from the Google Places API, with the reviewer's actual name and a date. Fake "Sarah from Newcastle, 2024" testimonials underperformed massively.
- Specific, not glowing - "He fitted the boiler on the day I rang" beats "Best service ever, 10/10". Specificity is the proxy for authenticity.
- Trade-relevant - a review mentioning the exact service the page is about converted 2x better than a generic positive review.
The Numbers variant only worked when the numbers were:
- Round-but-not-suspiciously-round - "287 jobs" beat "300 jobs" by a small but measurable margin. People can smell a rounded marketing number.
- Verifiable - "4.9★ on Google" with a link to the actual reviews beat a star rating with no source.
What we now do by default
Every UK local web design build now ships with a trade-appropriate trust bar as the default, with a one-click switch in the admin dashboard to A/B test the alternatives. We've stopped pretending there's a universal answer. The default for each trade is:
- Plumbers / electricians / locksmiths / mobile mechanics: Numbers, with response time first.
- Roofers / builders / extensions / kitchens: Reviews, live from Google.
- Landscapers / decorators / aesthetic trades: Accreditation logos.
The technical bit
Live Google reviews are pulled server-side via a TanStack server function that hits the Places API once an hour and caches the result. We pick the three most recent 5-star reviews that are at least 30 characters long and don't contain banned phrases ("highly recommend" is a tell of a copy-pasted template). The whole component is about 40 lines of code; we ship it for free on every Built Local site.
The shortcut
If you want this without the test, Built Local ships the trade-appropriate default with every build. See the 9 conversion fixes for the rest of the trust stack, or start a build if you'd rather just have it done.