Builder
Sigma Building
Trust score
58out of 100
Rating5.0★
Review volumeLow · 3
Evidence breadth2 independent public sources
Profile statusListed
Based on rating, review volume, independent sources and verification. Evidence context — not a guarantee of workmanship.
Planning evidence
Nearby projects
Checking nearby planning applications.
Reviews · public evidence
What customers say
These reviews are published independently on the named public sources below — not testimonials this trader 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
Highlights
"Excellent Work by Sigma Builder Company! I recently hired Sigma Builder Company to convert my garage into a living room, and I couldn't be happier with the results! They did an outstanding job with great skill and efficiency. The project was completed quickly without compromising on quality. One of the standout aspects of their work was the high-quality materials they used, which not only enhanced the final look but also impressed the inspector. Their attention to detail and professionalism made the entire process smooth and stress-free. I highly recommend Sigma Builder Company to anyone loo"
"Ionut did an amazing job! He is skilled at many trades and was equally confident building, plastering, plumbing or doing electrical. Everything was finished to a high standard and left tidy. He is thoughtful and had many helpful suggestions. He is customer-focused and tried to accommodate all of my requests. Value for money and would definitely recommend him 10/10"
"Inout was great! He was really helpful and a great communicator prior to the job. He worked really heard. Very efficient. The paint work looks great very happy I would use again"
Detailed reviews
Inout was great! He was really helpful and a great communicator prior to the job. He worked really heard. Very efficient. The paint work looks great very happy I would use again
Excellent Work by Sigma Builder Company! I recently hired Sigma Builder Company to convert my garage into a living room, and I couldn't be happier with the results! They did an outstanding job with great skill and efficiency. The project was completed quickly without compromising on quality. One of the standout aspects of their work was the high-quality materials they used, which not only enhanced the final look but also impressed the inspector. Their attention to detail and professionalism made the entire process smooth and stress-free. I highly recommend Sigma Builder Company to anyone loo
Ionut did an amazing job! He is skilled at many trades and was equally confident building, plastering, plumbing or doing electrical. Everything was finished to a high standard and left tidy. He is thoughtful and had many helpful suggestions. He is customer-focused and tried to accommodate all of my requests. Value for money and would definitely recommend him 10/10
Sources
2 named public sourcesEvery signal, traced to its origin
Review sources
Official sources
Public evidence last checked May 2026
About
Builder in Ampthill, Bedfordshire.
Check them yourself
What to check before you hire
Worth checking yourself
Review volume: Low · 3
Profile status: 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.
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 Sigma Building before you contact them.
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Common questions about Sigma Building
What do customers say about Sigma Building?
Sigma Building has 3 public reviews, averaging 5 out of 5. You can read the individual reviews and where each came from in the reviews section above.
How do I know Sigma Building's reviews are genuine?
Sigma Building's 3 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.