# Trident Damp Ltd Trident Damp Ltd is a builder in London. Rated 4.9/5 from 459 public reviews across 4 review sources. This is the MyTrustedTraders public-evidence profile for this trader, with independent reviews, credentials and registry data from named public sources, no ads, and no paid placement. No Trust Score yet: review caution: one or more review signals need a closer check. Operating since at least 2012 (14 years), according to an independent source, not just their own word. 24 reviews in the last 12 months. ## About Trident Damp Ltd has been vetted and approved by TrustATrader. Covering all areas within 50 miles ## Public review evidence (by source) | Source | Average rating | Reviews | | --- | --- | --- | | Checkatrade | 4.9/5 | 355 | | Rated People | 5.0/5 | 62 | | Which? Trusted Traders | 4.2/5 | 26 | | TrustATrader | 5.0/5 | 16 | _Per-source review counts may overlap. They need not sum to the 459 cross-checked total above._ ## Review signals to check _One or more review signals need a manual check. Some review signals are flagged for a closer manual check. That doesn't prove fake reviews or any wrongdoing._ - **Ratings disagree across sources:** 2 eligible sources differ by 0.8 stars - **Repeated review text:** 2 exact review-text pattern(s) found across sources Rated 4.9, in line with the local average for builders in London. Across 2821 builders in London, the typical rating is 4.9 out of 5. We compare against the same businesses a homeowner would find searching for this trade locally. Most recent review: 5 months ago. ## What customers consistently praise _Themes mentioned across this trader's own public reviews:_ - Friendly & polite (mentioned in 29% of reviews we've read) - Professional (mentioned in 27% of reviews we've read) ## In customers' own words _Verbatim quotes from this trader's public reviews, each attributed to its source:_ > "Came to sort out a rising damp issue in our property - Joseph attended our property free of charge to take a look which was so nice. We were quoted more from another larger company and Joseph's price was the best so decided to go with Trident. Joseph and his team arrived on the day on-time and were absolutely brilliant - real attention to detail, tidy, efficient and just genuinely nice people. Would deffo recommend! Thanks Trident :)" > Source: Customer (5.0, via Checkatrade) > "Joseph completed a pre purchase damp survey for a property we’re buying. The report was thorough, clear, and provided quotes for the remedial work and a site plan, plus further recommendations in other areas (such as getting a roofer and plumber in to look at other issues). The report was provided the same day as the survey, and gave us everything we needed to help negotiations with the vendor. 5 star service, thank you!" > Source: Alice P (5.0, via Checkatrade) > "Thank you so much for the damp work completed on two walls arrived on time on scheduled day , made preparations to lay stuff down and cover kitchen door to stop minimal mess. and cleaned up after them. thank you to Joseph and team ." > Source: Customer in Greater London (5.0, via Which? Trusted Traders) ## Trades Builder, Roofer ## Services they list _Listed on public sources or the business's own website; check directly that they cover your job before you book:_ - Damp Investigation - Damp Survey - Dry Rot Treatment - Penetrating Damp Treatment - Rising Damp - Structural Water Proofing - Timber Treatment - Woodworm Treatment ## Areas covered _Towns and areas this trader lists serving. This is their own stated coverage, so confirm they cover your exact address before you book:_ - Sidcup ## What we checked, and when As of 29 Jul 2026, we hold 459 independent reviews across Checkatrade, Rated People and Which? Trusted Traders and 1 more for this business, and Companies House lists (no. 07965156) as active, checked 20 May 2026. _What MyTrustedTraders independently checked for this business (verified items only):_ - Review volume: MyTrustedTraders shows 459 public reviews on this profile. (via MyTrustedTraders public listing) - Public listing spread: MyTrustedTraders shows 5 public listings for this trader. (via MyTrustedTraders public listing) - Business identity: MyTrustedTraders shows public business identity data for company number 07965156 with operating status active. (via MyTrustedTraders public listing) - Contact phone: MyTrustedTraders shows a public phone contact on this profile. (via MyTrustedTraders public listing) - Website: MyTrustedTraders shows a public website for this trader. (via MyTrustedTraders public listing) Full verification checklist: https://mytrustedtraders.com/traders/trident-damp-ltd-2/checks ## Credentials & sources - Credentials shown: 3 (none currently verifiable) - Companies House status: Active - Run by 1 director; the longest-serving current director was appointed in 2012 (Companies House officers) - Website online since 2012 (verified via public domain registry) - Evidence held from: TrustATrader, Which? Trusted Traders, Checkatrade, Rated People, Waste carrier (Environment Agency), Companies House - Check dates vary by source. Where we hold a date, the check shows it. ## What this business says about itself _Self-declared on the trader's own website, not independently verified:_ - Guarantee: 30 Years Guarantee - VAT registered: GB 129751396 (check on the HMRC VAT checker: https://www.gov.uk/check-uk-vat-number) ## Before you hire a builder _What to check when choosing this kind of trade (general guidance, not a claim about this business):_ - 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. ## Contact - Phone: 07427 137663 - Website: https://tridentdamp.co.uk/ --- Source: MyTrustedTraders, https://mytrustedtraders.com/traders/trident-damp-ltd-2 Real public evidence only: every figure traces to a named source and is cross-checked. If a source does not carry a field, it is not shown.