BuilderPublic profile
Allen Building Ltd
Credentials & registries
1 named source
Trust score
85out of 100
Rating5.0★
Review volume31
Source diversity4 sources
VerificationVerified
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 Allen 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 Allen Building Ltd →Credentials and associations
1Named registry and membership evidence
Official or controlled checks carry the strongest weight here. Listed, missing, and ambiguous evidence stays visibly weaker than a verified pass.
Planning evidence
Nearby projects
Checking nearby planning applications.
About
Allen Building Ltd is an established construction company in Cardiff. We have been in business for 15 years. We have a solid portfolio and many references to our name. We are all so accredited Master builders by the F.M.B www.abuilderscardiff.co.u
Reviews · public evidence
What the public record says
5.0out of 5
Highlights
"Dan and his team did a full renovation and extension for us, and we’re thrilled with the results. Dan is passionate about his work, truly takes pride in every detail, and was incredibly conscientious throughout. He genuinely cared that we were 100% happy and wouldn’t rest until everything was just right. The whole team was skilled, trustworthy, and a pleasure to have around. We couldn’t recommend them more highly."
"We are very pleased with Matt’s work for us -he is organised ,takes pride in the job and makes helpful suggestions.He delivered our project to the agreed timeline and was a pleasure to work with . We have no hesitation in recommending Matt to other people ."
"Would have no hesitation in recommending Matt and all his team to anyone. Always on time, first class workmanship, very professional, no problem with variations. Work completed to a high standard and on time. Great guys, great work and turned our house into a home. Definitely use him again. Highly recommended. Thanks Matt"
Detailed reviews
Dan and his team did a full renovation and extension for us, and we’re thrilled with the results. Dan is passionate about his work, truly takes pride in every detail, and was incredibly conscientious throughout. He genuinely cared that we were 100% happy and wouldn’t rest until everything was just right. The whole team was skilled, trustworthy, and a pleasure to have around. We couldn’t recommend them more highly.
We are very pleased with Matt’s work for us -he is organised ,takes pride in the job and makes helpful suggestions.He delivered our project to the agreed timeline and was a pleasure to work with . We have no hesitation in recommending Matt to other people .
Would have no hesitation in recommending Matt and all his team to anyone. Always on time, first class workmanship, very professional, no problem with variations. Work completed to a high standard and on time. Great guys, great work and turned our house into a home. Definitely use him again. Highly recommended. Thanks Matt
Matt is an excellent and extremely honourable builder. He is a man true to his word, honest and courteous.The work he carried out for us was excellent - quickly and efficiently done and we had hoped to have him renovate our house completely but, unfortunately due a family illness, we had to cancel the arrangement. And even then, Matt was courteous and polite. I cannot recommend him highly enough. Please do not hesitate to hire him for any kind of work.
I used Allen Building for a double storey side/single storey back extension. Matthew and his team thoroughly deserve their 5 star rating. From the start of the job they were punctual, helpful with suggestions on undecided aspects of the work and very reasonable in cost. I did not have to chase them and our work was carried out without any issues whatsoever and in the time frame required. I will be using them again in the future and would absolutely recommend their services. A really good job all round!
Review is for providing a quote for extension. Matt provided a detailed quote with a fast turnaround. Turned up to view job on time.
Daniel's team have done a few jobs for me over the years, going back a few years he fixed a roof for me last minute when I sprang a leak and everyone was trying to extort me. He's taken on a few jobs for me at work and is now also fitting new gates to my house with the view to doing further jobs including a bathroom and a fireplace rip out ready for a burner install and he is arranging the hetas engineer. Always found him reliable, trustworthy and reasonably priced! I always ring a few times as he's always on the tools himself so don't give up after a ring!
The scope of work was extensive, including structural changes, plastering and paintwork, a full electrical upgrade, bathroom installation and fireplace enhancements and every element was delivered to an exceptional standard. What truly sets Daniel and his team apart is their mindset: real pride in their work, genuine care, and a commitment to doing things properly and to the highest possible standard. Communication was excellent throughout, the pricing was fair and transparent, and the whole experience was professional, stress-free, and exceeded our expectations. Would definitely recommend.
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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 31 public reviewsAcross Checkatrade, Rated PeopleCheckatradeCompanies HouseCompanies House OfficersRated PeopleChartered Institute of Architectural Technologists
Sources
4 named sourcesEvery signal, traced to its origin
Public evidence checks
What's strong, and what to check yourself
✓Strong signals
✓Rating: 5.0★
✓Review volume: 31
✓Source diversity: 4 sources
✓Verification: Verified
✓1 verified credential
!Worth checking yourself
!Always confirm credentials and quotes with the trader directly before hiring.
Smart checks
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 Allen Building Ltd
What do customers say about Allen Building Ltd?
Allen Building Ltd has 31 public reviews, averaging 5 out of 5, gathered across 4 independent sources. You can read the individual reviews and where each came from in the reviews section above.
Is Allen Building Ltd qualified and accredited?
We hold 1 independently sourced credential for Allen Building Ltd, including Chartered Institute of Architectural Technologists. Each is attributed to the body that issued it in the credentials section.
Want an extra legitimacy check?
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