- Source checked
- 18 Mar 2026
Public evidence profile
J M Harji Construction Ltd
Review quality
No reviews in 12 months
Credentials & registries
2 credentials shown
Trust Score
48out of 100
How this score is worked out
Rating5.0 / 5
Review volume38
Independent sources1 independent public source
Credentials2 credentials shown
How this score is made up
What customers say33.9 of 60
Independent checks6.5 of 30
Track record7.2 of 10
See the independent checks
- Licences and credentials3.6 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.
Trust at a glance
2 checksWhat we can verify about J M Harji Construction Ltd
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.
Review qualityNo reviews in 12 monthsSee detail →Credentials & registries2 credentials shownSee detail →
See the full verification checklist for J M Harji Construction Ltd →Credentials and associations
2Credentials and memberships
These credentials and memberships are attributed to named public sources. Check the source before relying on them.
- Source checked
- 18 Mar 2026
Review quality check
Review recencyReview recency
How recently this business's reviews were left, kept separate from the star rating and the number of reviews.
No reviews from the last 12 months are shown.
From customer reviews
What customers consistently say
What this trader's customers report about their jobs, in their own words.
Respectful and tidy in your home: “They left the room they were working in tidied when they were finished.” · Checkatrade, 6 Apr 2021
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
How Checkatrade customers rate them (out of 5)
Reliability5.0
Communication5.0
Quality of work5.0
Where these reviews are published
- Checkatrade38 reviews · 5.0 avg
Highlights
“JM Harji Construction delivered outstanding service for my full house renovation and extension. Both, reliable and impeccable workmanship (despite challenges) to ensure precision builds using quality materials. Communication was excellent: regular updates and prompt query responses. Showed genuine respect for my home, best efforts at minimising noise and respecting my family’s schedule. Highly recommended for any large extension/house refurbs.”
“Fantastic team who cleaned up after themselves paid attention to detail and completed all works prior to deadline given.”
“Work was carried out to the specified standard. The quote and final price were the same, and we knew exactly what works would be carried out and the timeline before the builders started the works. Builders kept us informed of progress throughout the 2 days, and were able to answer any questions along the way. Very knowledgeable and were able to advise us on the best way forward on a number of things. They left the room they were working in tidied when they were finished. Minimal disturbance to the rest of the house. Builders were very courteous. 10/10 would recommend.”
Detailed reviews
These are the individual reviews we hold for J M Harji Construction Ltd, including the highlights above. The 38 headline total is the review volume reported across public review sources.
JM Harji Construction delivered outstanding service for my full house renovation and extension. Both, reliable and impeccable workmanship (despite challenges) to ensure precision builds using quality materials. Communication was excellent: regular updates and prompt query responses. Showed genuine respect for my home, best efforts at minimising noise and respecting my family’s schedule. Highly recommended for any large extension/house refurbs.
Fantastic team who cleaned up after themselves paid attention to detail and completed all works prior to deadline given.
Work was carried out to the specified standard. The quote and final price were the same, and we knew exactly what works would be carried out and the timeline before the builders started the works. Builders kept us informed of progress throughout the 2 days, and were able to answer any questions along the way. Very knowledgeable and were able to advise us on the best way forward on a number of things. They left the room they were working in tidied when they were finished. Minimal disturbance to the rest of the house. Builders were very courteous. 10/10 would recommend.
Local context
Rated 5.0, in line with the local average for builders in Northwood
Across 8 builders in Northwood, the typical rating is 4.9 out of 5. We compare against the same businesses a homeowner would find searching for this trade locally.
Sources
3 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
In Northwood, Greater London.
Areas served
Greater LondonNorthwood
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
Their public evidence comes from a single source. Look them up on another site before deciding.
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 M Harji Construction Ltd before you contact them.
Run Cowboy Checker →Good to know
Common questions about J M Harji Construction Ltd
Is J M Harji Construction Ltd a legitimate business?
J M Harji Construction Ltd has 38 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 J M Harji Construction Ltd?
J M Harji Construction Ltd has 38 public reviews, averaging 5 out of 5. You can read the individual reviews and where each came from in the reviews section above.
How is J M Harji Construction Ltd rated on reliability and quality?
On Checkatrade, customers rate J M Harji Construction Ltd by category: Reliability 5.0 out of 5, Communication 5.0 out of 5, Quality of work 5.0 out of 5. These are per-category scores from real published reviews. They show where J M Harji Construction Ltd is strongest, not just the overall average.
How do I know J M Harji Construction Ltd's reviews are genuine?
J M Harji Construction Ltd's 38 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 J M Harji Construction Ltd qualified and accredited?
We hold 2 independently sourced credentials for J M Harji Construction Ltd, including Gas Safe Register, CIPHE. Each is attributed to the body that issued it in the credentials section. For example, Gas Safe Register is the UK's official gas register. By law, anyone working on your gas appliances must be on it.
How long has J M Harji Construction Ltd been trading?
J M Harji Construction Ltd has been reviewed on public sources since 2021.
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