Once again, John and his team carried out their work impeccably, actually completing the project slightly ahead of time. Our flat required pretty much gutting, with some rooms changing use. This included new plumbing for a new bathroom and repositioned kitchen; new wiring; and one new doorway being created. This was followed by re-plastering and redecorating - so we really did have the full range of work done! The team were professional, understanding, flexible and always lovely to be around. No request was too much for them, and the finished product looks great - we couldn’t be happier.
Public evidence profile
J-Build
Trust Score
32out of 100
- Rated 4.8 from 10 reviews
- 3 reviews in the last 12 months
How this score is worked out
Rating4.8 / 5
Review volumeLow · 10
Independent sources1 independent public source
CredentialsNo credentials shown yet
How this score is made up
What customers say23.7 of 60
Independent checks2.9 of 30
Track record5 of 10
See the independent checks
- Licences and credentials0 of 10.3
- Ways to reach them2.9 of 3.4
- Reviewed on more than one site0 of 5.1
- Registered company details0 of 5.1
- Photos of their work0 of 4.3
- Industry recognition0 of 1.7
Missing evidence lowers the score because we can't check it. It doesn't mean it doesn't exist. Claiming a profile never changes the score. Evidence context, not a guarantee of workmanship.
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.
4.8out of 5
Where these reviews are published
- Checkatrade10 reviews · 4.8 avg
Detailed reviews
These are the individual reviews we hold for J-Build, including the highlights above. The 10 headline total is the review volume reported across public review sources.
John and his team at J-Build were professional, reliable, and delivered exactly as promised. The quality of their work was excellent, and any aftercare or follow-up repairs were handled smoothly and to a high standard. I would highly recommend J-Build to anyone looking for dependable and skilled builders.
Jon and his team completed a back and front extension, a loft conversion, and a total gutting of the original property. Throughout the project Jon communicated clearly, supported us with decisions, explained the process and worked with us to create the home of our dreams. Jon was flexible and understanding, and quickly became a firm favourite amongst our kids, who still ask to see him whenever possible! We are enormously grateful to him and his team for everything they did to help our dream become a reality.
Sources
1 named public sourceWhere 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
Check dates vary by source. Where we hold a date, the check shows it.
Services they list
CladdingConcretingDemolitionExtensions / ConversionsFoundationsGarage ConversionsGarden StudiosGeneral BuildingLoft ConversionsNew BuildsPeriod Property RestorationRefurbishments
Listed on public sources or the business's own website; check directly that they cover your job before you book.
Areas served
Greater LondonLondon
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
Only a few public reviews are shown. Ask for recent references you can contact.
Their public evidence comes from a single source. Look them up on another site before deciding.
No credentials are shown here and the business has not claimed this profile. Ask to see certificates and insurance directly.
Verify at the sourceCheck them yourself
This trade isn't licensed in the UK, so anyone can set up. TrustMark is the only Government-endorsed quality scheme for work in and around the home - check whether they're registered, or find a TrustMark-registered business.
Check the TrustMark registerNever pay a large deposit up front. Agree a staged payment schedule tied to completed milestones, and hold a small retention until snagging is done.
Get it in writing: an itemised quote with scope, materials, start and finish dates, and how any changes (variations) will be priced.
Be wary of a cash-only price or pressure to start tomorrow. Both are red flags for an unaccountable job.
Want an extra legitimacy check? Run the Cowboy Checker on J-Build before you contact them.
Run Cowboy Checker →Good to know
Common questions about J-Build
Is J-Build a legitimate business?
J-Build has 10 independent public reviews, rated 4.8 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 J-Build?
J-Build has 10 public reviews, averaging 4.8 out of 5. You can read the individual reviews and where each came from in the reviews section above.
How do I know J-Build's reviews are genuine?
J-Build's 10 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.
Has J-Build had recent public reviews?
J-Build has 3 public reviews dated within the last 12 months. That shows their review history includes recent feedback; it does not prove current availability, so confirm capacity before hiring.
What does J-Build specialise in?
J-Build lists specialist services including Cladding, Concreting, Demolition, Extensions / Conversions, Foundations, Garage Conversions. If your job is one of these, look for it in their listed services or ask them to confirm for your project.
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