How to Tell if Builder Reviews Are Real - A No-Nonsense Guide
Not all builder reviews are genuine. Here's how to spot fake reviews, which platforms are most trustworthy, and how to verify a builder's reputation properly.
You've found a builder online. Their reviews look brilliant. Five stars across the board. Glowing testimonials. Happy customers praising their work ethic, tidiness, and fair pricing.
Sounds perfect. But are those reviews real?
The uncomfortable truth is that fake reviews are common in the building trade. Some builders buy them. Some ask friends and family to post them. Some use review management services that quietly remove negative ones.
This guide shows you how to spot the fakes, which platforms to trust most, and how to properly verify a builder's reputation beyond what's on their profile page.
Why fake reviews are so common in building
The building trade has conditions that make fake reviews attractive.
High-value decisions. Homeowners are spending tens of thousands of pounds. They rely on reviews for reassurance. That makes reviews powerful. And when something is powerful, people game it.
Low barrier to entry. Anyone can call themselves a builder. There's no mandatory licensing in England and Wales for general building work. Reviews become a proxy for credentials - but they're far easier to fake than a qualification.
The financial incentive is real. A profile with forty five-star reviews gets more enquiries than one with eight mixed reviews. Builders know this. Some take shortcuts.
7 signs a review might be fake
Not every suspicious review is fake. But if you spot several of these patterns on the same profile, proceed with caution.
1. Same-day review clusters
Fifteen reviews posted in the same week - especially if the builder only has twenty reviews total. Real customers leave reviews sporadically, usually within a few days of the job finishing. A sudden batch suggests they've been solicited or manufactured.
Check the dates. If half the reviews appeared within the same fortnight, that's unusual.
2. Vague praise with no project details
"Brilliant job, would highly recommend!"
"Fantastic builder, very professional."
"10/10 would use again."
These could be about literally any builder doing literally any job. Genuine reviews mention specifics. "They fitted our new kitchen in three weeks and the tiling work was particularly good." That's real. Generic praise isn't proof of anything.
3. No mention of the actual work done
Real customers talk about their project. They mention the type of work - extension, bathroom, roof repair - and usually comment on the timeline, the mess (or lack of it), and the final result.
Fake reviews tend to avoid specifics because the person writing them doesn't know the details. They stick to safe generalities.
4. Marketing language
"We were delighted with the exceptional standard of craftsmanship delivered by this outstanding company."
Real people don't write like that. They write like humans: "Really happy with the work. Kitchen looks great. They were a bit late starting but made up the time."
If the review reads like it belongs on the builder's brochure, it probably came from the builder.
5. Reviewer profiles with only one review
Click on the reviewer's name. If their profile shows one review - this builder - and nothing else, that's suspicious. Real people who leave reviews tend to leave more than one over time.
This isn't conclusive on its own. Some people only ever leave one review. But if a builder has thirty reviews and twenty of them are from single-review profiles, the pattern matters.
6. Only five-star ratings
No threes. No fours. Just fives, from start to finish.
No builder is perfect on every job. Delays happen. Communication slips. Minor snags take too long to fix. A genuine review profile has a mix - mostly positive, with the occasional four-star or three-star review where something wasn't quite right.
A wall of unbroken five-star reviews is either curated (negatives removed) or fabricated.
7. Stock photos or no photos at all
Some platforms let reviewers upload photos. If every review photo looks professionally shot - perfect lighting, no mess, staged furniture - be sceptical. Real job-site photos look like real job-site photos: slightly wonky, taken on a phone, with the homeowner's furniture in the background.
And if a builder has forty reviews but zero customer photos, that's worth noting.
Which platforms are most trustworthy
Not all review platforms are created equal. Some verify that the reviewer actually hired the builder. Some don't.
Checkatrade - verified reviews
Checkatrade contacts customers directly to request reviews. The builder can't submit reviews on their own behalf or remove negative ones. This makes Checkatrade reviews more reliable than most.
One caveat: it's a paid listing service. A builder with a low rating might cancel their subscription and vanish from the site. So the profiles you see are self-selecting.
TrustMark - government-endorsed
TrustMark is backed by the UK government and requires members to meet specific standards. Reviews are verified. It's probably the most credible platform, though it has fewer listings than Checkatrade.
Google Reviews - unverified but useful
Anyone with a Google account can leave a review. No verification. But Google reviews are harder to fake at scale. A builder with 200 reviews averaging 4.6 stars is probably legitimate. A builder with 12 reviews all at 5 stars is easier to manipulate.
Read the negative reviews carefully. They're usually the most honest.
Facebook and the builder's own website
Facebook reviews are easy to fake - friends and family can post without ever hiring the builder. Useful for seeing how a builder responds to complaints, but don't trust the star rating.
Reviews on a builder's own website are curated by the builder. You're only seeing the highlight reel.
How to verify a builder beyond reviews
Reviews are one piece of the puzzle. Here's how to build a fuller picture.
Check Companies House
If they're a limited company, look them up for free on Companies House. Check when they were incorporated and whether they've filed accounts. A builder who's been running the same company for ten years is a different proposition from one incorporated three months ago.
Ask for insurance certificates
Don't ask if they have insurance. Ask for a copy of the certificate. Public liability insurance (minimum £2 million cover) and employer's liability insurance (if they have staff) are the basics. A builder who can't produce these within 24 hours probably doesn't have them.
Verify trade body membership
Federation of Master Builders (FMB), TrustMark, NHBC - these require members to meet standards. Membership numbers are verifiable on the trade body's website. Check the register yourself. Some builders display logos they're not entitled to use.
Ask for references - and actually call them
This is the gold standard and most homeowners skip it. Ask for three references from jobs completed in the last twelve months. Then actually phone those people.
For more on what to look for before committing, our guide on 5 things to check before hiring a builder covers the full vetting process.
Visit a current or recent job site
If the builder is comfortable with their work, they'll let you visit. You don't need a full inspection - just seeing the job in progress tells you a lot. Is the site tidy? Are materials stored properly? A builder who refuses to let you see their work is telling you something.
Check for county court judgments
Search the Register of Judgments, Orders and Fines for £10 per search. This shows any outstanding county court judgments against the builder. For large projects, it's worth the tenner.
What to ask when calling references
Don't just ask "Were you happy?" Ask specific questions that reveal real information.
- Did the job finish on time? If not, how late, and was the delay communicated clearly?
- Was the final cost within 10% of the original quote? Were there extras? Were they justified and agreed in advance?
- Were there any surprises? Things that weren't in the quote but appeared as costs during the project?
- How was communication? Did the builder return calls? Were problems discussed openly?
- Would you use them again? This is the big one. A yes without hesitation means a lot.
- Did they clean up? Sounds minor, but a builder who leaves a clean site at the end of each day is a builder who takes pride in their work.
- How did they handle problems? Every project has problems. What matters is how they're dealt with.
Pay attention to hesitation. If someone pauses before answering "Would you use them again?" that pause tells you more than the eventual "Yes" that follows.
The bottom line
Reviews are a starting point. Not the whole story.
A builder with great reviews might be brilliant - or just good at managing their online presence. A builder with no reviews might work entirely through word-of-mouth and be excellent.
The genuinely good builders pass every check - reviews, credentials, references, site visits, and a fair, detailed quote. The ones who aren't will fail somewhere along the line. If you want to know what a fair quote looks like, our guide on signs your builder is overcharging walks through the warning signs in detail. Your job is to check enough boxes that you can decide with confidence.
If you've vetted the builder and now need to assess whether their quote is fair, get a quick analysis of your quote to check the pricing and scope before you commit.