Builder
4&J Construction Ltd
Companies House
Active incorporated business
Trust score
63out of 100
Rating4.7★
Review volumeLow · 8
Source diversity3 sources
VerificationListed
Based on rating, review volume, independent sources and verification. Evidence context — not a guarantee of workmanship.
Trust at a glance
1 checkWhat we can verify about 4&J Construction Ltd
Each card summarises one evidence dimension from public sources — open it for the full detail and named source. This is evidence context, not a guarantee.
See the full verification checklist for 4&J Construction Ltd →Companies House registration
ActiveActive incorporated business
4&J Construction Ltd is linked to a Companies House entry. This shows the business registration, not evidence of workmanship or service quality.
Legal name4&J Construction Ltd
Company number14337265
Incorporated
Registered activityCommercial building construction
Official checkListed
Planning evidence
Nearby projects
Checking nearby planning applications.
About
Verified builder in BARNET, Hertfordshire.
Reviews · public evidence
What customers say
4.7out of 5
Highlights
"The job was in a tenanted flat and the tenant informed me that the contractor was extremely tidy and considerate throughout. Work was completed ahead of schedule and at price agreed. Excellent communication throughout. Would definitely use their services again."
"Erion and his team were amazing. Punctual, efficient, trustworthy and very reasonably priced."
"Erion and his team were amazing. Very communicative. Open. On time and in budget. Excellent to work with and would highly recommend."
Detailed reviews
Showing the 5 reviews we hold full text for. The 8 headline total is the review volume reported across 4&J Construction Ltd’s public review sources.
We engaged 4&J construction in renovating one of our bedrooms – removing carpet and a really old fitted wardrobe, then making good the wall behind. Plus we also had them extend the skirting board and coving, and fit a picture rail ready for redecoration. They did this work to an excellent standard, and kept me well informed throughout the whole process. The work uncovered some exposed pipes from an old boiler, so they also put me in touch with a plumber who could remove them so we could fit flooring. They left the room clean, tidy and ready for redecoration as requested. Would recommend.
4&J constructions Ltd ( Sergio & Team ) did a fantastic job in renovating my bedroom space. From demolishing the old storage space, laminating the flooring ( removing old carpet) ,supply and fitting the skirting boards and painting the walls , cieling as preferred by us was all professionally done. The house was kept completely clean before work and post work as well. Would highly recommend them for any building work to be carried out.
The job was in a tenanted flat and the tenant informed me that the contractor was extremely tidy and considerate throughout. Work was completed ahead of schedule and at price agreed. Excellent communication throughout. Would definitely use their services again.
Erion and his team were amazing. Punctual, efficient, trustworthy and very reasonably priced.
Erion and his team were amazing. Very communicative. Open. On time and in budget. Excellent to work with and would highly recommend.
Public evidence checks
Public evidence shownTrust checks and red flags
Public review evidence4.7★ from 8 public reviewsAcross CheckatradeCheckatradeCompanies HouseCompanies House Officers
Sources
3 named sourcesEvery signal, traced to its origin
Review sources
Official sources
Independent checks
About this business
A real, registered businessWe cross-checked Companies House: this business is officially registered for work that matches the builder services it advertises - independent confirmation it's a genuine business set up to do this kind of work, not just a directory entry.
Public evidence checks
What's strong, and what to check yourself
✓Strong signals
✓Rating: 4.7★
✓Source diversity: 3 sources
!Worth checking yourself
!Review volume: Low · 8
!Verification: Listed
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.
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Before you hire a builder
Never 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.
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Check the credentials and registrations that matter for this work — and that they are current.
Good to know
Common questions about 4&J Construction Ltd
What do customers say about 4&J Construction Ltd?
4&J Construction Ltd has 8 public reviews, averaging 4.7 out of 5, gathered across 3 independent sources. You can read the individual reviews and where each came from in the reviews section above.
How do I know 4&J Construction Ltd's reviews are genuine?
4&J Construction Ltd's 8 public reviews are gathered and cross-checked across 3 independent public sources. Reviews spread across several named sources are harder to fake than a single polished 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 4&J Construction Ltd a registered business?
4&J Construction Ltd is a registered business on Companies House (company number 14337265), incorporated 5 Sept 2022, listed as active. This confirms the legal registration of the business — not evidence of workmanship or service quality.
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