BuilderPublic profile
GMSG Building Ltd
Companies House
Active incorporated business
Trust score
72out of 100
Rating5.0★
Review volumeLow · 22
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 GMSG Building 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 GMSG Building Ltd →Companies House registration
ActiveActive incorporated business
GMSG Building Ltd is linked to a Companies House entry. This shows the business registration, not evidence of workmanship or service quality.
Legal nameGMSG Building Ltd
Company number13535710
Incorporated
Registered activityRoofing
Official checkListed
Planning evidence
Nearby projects
Checking nearby planning applications.
About
Verified builder in Cardiff, South Glamorgan.
Reviews · public evidence
What the public record says
5.0out of 5
Highlights
"GMSG assessed the damage, secured the materials and carried out the repair promptly. As is typical with this company, the work was finished to a high standard for the agreed quote I have every intention, subject to satisfactory quotes of course, of utilising their services in future."
"Lawson was really helpful - came over when no other companies had offered, and completely put our minds at ease with some cracking we'd noticed in various parts of our house. He offered practical advice and further help if needed. Thanks again!"
"Friendly efficient professional service, work to high standard and cleaned thoroughly after work completed. Quote for work accurate."
Detailed reviews
GMSG assessed the damage, secured the materials and carried out the repair promptly. As is typical with this company, the work was finished to a high standard for the agreed quote I have every intention, subject to satisfactory quotes of course, of utilising their services in future.
Lawson was really helpful - came over when no other companies had offered, and completely put our minds at ease with some cracking we'd noticed in various parts of our house. He offered practical advice and further help if needed. Thanks again!
Friendly efficient professional service, work to high standard and cleaned thoroughly after work completed. Quote for work accurate.
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Local context
Rated 5.0★ — above the local average for builders in Cardiff
Across 63 rated builders in Cardiff, the typical rating is 4.9★. We compare against the same businesses a homeowner would find searching for this trade locally.
Public evidence checks
Public evidence shownTrust checks and red flags
Public review evidence5.0★ from 22 public reviewsAcross CheckatradeCheckatradeCompanies HouseCompanies House Officers
Sources
3 named sourcesEvery signal, traced to its origin
Review platforms
Official sources
Public evidence checks
What's strong, and what to check yourself
✓Strong signals
✓Rating: 5.0★
✓Source diversity: 3 sources
!Worth checking yourself
!Review volume: Low · 22
!Verification: Listed
Verify at the sourceCheck them yourself
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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.
Ask to see a portfolio of completed work like yours, plus recent references you can contact.
Check the credentials and registrations that matter for this work — and that they are current.
Good to know
Common questions about GMSG Building Ltd
What do customers say about GMSG Building Ltd?
GMSG Building Ltd has 22 public reviews, averaging 5 out of 5, gathered across 3 independent sources. You can read the individual reviews and where each came from in the reviews section above.
Is GMSG Building Ltd a registered business?
GMSG Building Ltd is a registered business on Companies House (company number 13535710), incorporated 28 Jul 2021, listed as active. This confirms the legal registration of the business — not evidence of workmanship or service quality.
Want an extra legitimacy check?
Run the Cowboy Checker on GMSG Building Ltd before you contact them.
