Damp proofing / waterproofing
Onyx Basement Services Ltd
Trust score
47out of 100
Rating5.0★
Review volumeLow · 3
Evidence breadth1 independent public source
Profile statusListed
Based on rating, review volume, independent sources and verification. Evidence context — not a guarantee of workmanship.
Reviews · public evidence
What customers say
These reviews are published independently on the named public source 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
"The guys were great. A horribly messy job in cramped conditions, with a few 'old house' quirks thrown in. Dealt with all of it professionally and competently. Cleaned up and took away all waste. Friendly and polite. Wouldn't hesitate to recommend."
"Amazing service from Dale and his colleagues at Onyx basement services LTD. Carried out the work to a high standard and maintained professionalism at all time. Highly recommend company and will definitely use again in the future for any further work needed. 10/10 service"
"Great service and very clean conscientious workforce."
Detailed reviews
The guys were great. A horribly messy job in cramped conditions, with a few 'old house' quirks thrown in. Dealt with all of it professionally and competently. Cleaned up and took away all waste. Friendly and polite. Wouldn't hesitate to recommend.
Amazing service from Dale and his colleagues at Onyx basement services LTD. Carried out the work to a high standard and maintained professionalism at all time. Highly recommend company and will definitely use again in the future for any further work needed. 10/10 service
Great service and very clean conscientious workforce.
Local context
Rated 5.0★ — above the local average for damp proofing / waterproofing in London
Across 27 rated damp proofing / waterproofing in London, the typical rating is 4.8★. We compare against the same businesses a homeowner would find searching for this trade locally.
Sources
1 named public sourceEvery signal, traced to its origin
Review sources
About
Damp proofer in LONDON.
Services they list
Damp Proofer
Listed on public sources or the business's own website; check directly that they cover your job before you book.
Areas served
London
The areas they list covering on a public directory; confirm they cover your address before you book.
Check them yourself
What to check before you hire
Worth checking yourself
Review volume: Low · 3
Evidence breadth: 1 independent public source
Profile status: Listed
Verify at the sourceCheck them yourself
Damp and timber work isn't licensed in the UK, and "rising damp" is often over-diagnosed - so a real qualification matters. Property Care Association members hold recognised damp-surveying qualifications (CSRT/CSSW), follow a code of ethics and must have traded at least three years. Check they're a PCA member before you accept a damp-treatment quote.
Check the PCA registerGet an INDEPENDENT damp survey — not a free one from the firm that wants to sell you the treatment. A free survey has every incentive to diagnose expensive 'rising damp', when the problem is often condensation, a leak, or high ground level that needs no chemical injection.
Insist they identify and fix the underlying CAUSE — a leak, blocked airbricks, poor ventilation, failed pointing — before agreeing to an injected damp-proof course, and ask them to explain why simpler fixes won't work.
Get the diagnosis and an itemised quote in writing, and be wary of pressure to sign on the spot for a long 'guarantee' that is only worth anything while that firm is still trading.
Want an extra legitimacy check? Run the Cowboy Checker on Onyx Basement Services Ltd before you contact them.
Run Cowboy Checker →Good to know
Common questions about Onyx Basement Services Ltd
What do customers say about Onyx Basement Services Ltd?
Onyx Basement Services Ltd 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 Onyx Basement Services Ltd's reviews are genuine?
Onyx Basement Services Ltd'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.
What does Onyx Basement Services Ltd specialise in?
Onyx Basement Services Ltd lists specialist services including Damp Proofer. If your job is one of these, look for it in their listed services or ask them to confirm for your project.
How long has Onyx Basement Services Ltd been trading?
Onyx Basement Services Ltd has been reviewed on public sources since 2022.