- Source reference
- CBDU424608
- Licence class
- upper-tier
- Valid through
- Feb 2028
- Source checked
- 30 Jun 2026
Public evidence profile
GJ Building
Credentials & registries
Waste carrier (Environment Agency)
No Trust Score yet
- Rated 5.0 from 19 reviews
- 1 credential shown
Worth checking: NFRC Competent Person Scheme (CompetentRoofer)
Based on rating, review volume, independent sources and credential evidence. Evidence context, not a guarantee of workmanship.
Trust at a glance
1 checkWhat we can verify about GJ Building
Each card sums up one thing we can check from public sources. Open it for the full detail and the named source. This is evidence context, not a guarantee.
See the full verification checklist for GJ Building →Credentials and associations
1Credentials and memberships
These credentials and memberships are attributed to named public sources. Check the source before relying on them.
Reviews · public evidence
What customers say
These reviews are published independently on the named public source below, not testimonials this business chose to show. We bring them together and link each one back to where it appeared, so you can open the source and read it yourself.
5.0out of 5
Based on the 1 review with a star rating
5 stars1
4 stars0
3 stars0
2 stars0
1 star0
Where these reviews are published
- Checkatrade19 reviews · 5.0 avg
Highlights
“Needed a builder to do some work on my mums house. She had a leak in her conservatory. James was called and came out on a Sunday, spent an hour investigating, to determine the problem, which we found impressive. He explained everything fully, and provided a very reasonable quote. With my mum being of maturing years, he went above and beyond for her, and was understanding when problems arose. He kept me informed via text, whatsapp, with photos and videos, so I could see the progress Can not recommend James and G J Building Solutions enough, and we would definitely use him again in the future”
Detailed reviews
Needed a builder to do some work on my mums house. She had a leak in her conservatory. James was called and came out on a Sunday, spent an hour investigating, to determine the problem, which we found impressive. He explained everything fully, and provided a very reasonable quote. With my mum being of maturing years, he went above and beyond for her, and was understanding when problems arose. He kept me informed via text, whatsapp, with photos and videos, so I could see the progress Can not recommend James and G J Building Solutions enough, and we would definitely use him again in the future
Local context
Rated 5.0, above the local average for roofers in Leighton Buzzard
Across 13 roofers in Leighton Buzzard, the typical rating is 4.7 out of 5. We compare against the same businesses a homeowner would find searching for this trade locally.
Sources
2 named public sourcesWhere this information comes from
Everything on this page is drawn from named public sources. Where a source provides a public link, you can open the original and dig deeper.
Review sources
Registers and membership directories
Check dates vary by source. Where we hold a date, the check shows it.
About
Roofer in Leighton Buzzard.
Services they list
Asphalt Roofing InstallationAsphalt Roofing RepairBalcony Roofing InstallationBalcony Roofing RepairChimney Cowlings InstallationChimney Cowlings RepairChimneys InstallationChimneys RepairConservatory Roof ConversionsDormer / Roof WindowsDry Ridge InstallationDry Ridge Repair
Listed on public sources or the business's own website; check directly that they cover your job before you book.
Areas served
Leighton Buzzard
The areas they list covering on a public directory; confirm they cover your address before you book.
Your own checks
What to check before you hire
Worth checking yourself
Always confirm credentials and quotes with the business directly before hiring.
Verify at the sourceCheck them yourself
Roofing isn't licensed, so anyone can set up - and it's a trade with more than its share of cowboys. A big re-roof must meet building regulations; CompetentRoofer (the Government-authorised NFRC scheme) registers roofers who can self-certify that, and vets and inspects them at least twice a year. Check they're on it before you hire.
Check the CompetentRoofer registerNever agree to roof work from a cold-caller at your door or an unsolicited 'we noticed your roof' note. That is the classic roofing scam.
Get a written quote that itemises access (scaffolding or a tower), the exact materials, and the workmanship guarantee, not a vague day rate.
Be wary of demands for a large cash deposit; agree staged payments against work you can actually see completed.
Want an extra legitimacy check? Run the Cowboy Checker on GJ Building before you contact them.
Run Cowboy Checker →Good to know
Common questions about GJ Building
Is GJ Building a legitimate business?
GJ Building has 19 independent public reviews, rated 5 out of 5. This is independent public evidence gathered from named public sources (no ads, no paid placement), not a guarantee of workmanship. If anything here is out of date, the business can request a correction.
What do customers say about GJ Building?
GJ Building has 19 public reviews, averaging 5 out of 5. You can read the individual reviews and where each came from in the reviews section above.
How do I know GJ Building's reviews are genuine?
GJ Building's 19 public reviews come from a named public review source, and MyTrustedTraders links every one back to where it was published, so you can open the source and read them yourself rather than trusting a single curated page. MyTrustedTraders brings this public evidence together with no ads and no paid placement: we show where every review came from rather than selling rankings, so you can weigh the evidence for yourself.
Is GJ Building qualified and accredited?
We hold 1 independently sourced credential for GJ Building, including Waste carrier (Environment Agency). Each is attributed to the body that issued it in the credentials section. For example, Waste carrier (Environment Agency) is the Environment Agency: the regulator a trader must register with to carry waste or hold an environmental permit in England.
What does GJ Building specialise in?
GJ Building lists specialist services including Asphalt Roofing Installation, Asphalt Roofing Repair, Balcony Roofing Installation, Balcony Roofing Repair, Chimney Cowlings Installation, Chimney Cowlings Repair. If your job is one of these, look for it in their listed services or ask them to confirm for your project.