# Extension / renovation contractors in Harrow

6 extension / renovation contractors near Harrow, ranked by the strength of independent public evidence. Trust Score is used when available, drawing on reviews, credential evidence and registry data from named public sources, cross-checked wherever more than one source covers a business. No ads, no paid placement. Grouped by main trade first, then businesses that also offer this trade, with possibly closed businesses last. Highest Trust Score first within each group. All 6 are listed below, ranked by evidence.

| Trader | Location | Trust Score | Rating | Reviews | Named sources | Listed under |
| --- | --- | --- | --- | --- | --- | --- |
| [JPH Property Developments](https://mytrustedtraders.com/traders/jph-property-developments) | Ruislip | 38/100 | 5.0/5 | 3 | Checkatrade | Also offer this trade |
| [GRD Carpentry Loft Conversion Specialist](https://mytrustedtraders.com/traders/grd-carpentry-loft-conversion-specialist) | Ruislip | 33/100 | 5.0/5 | 3 | Checkatrade | Also offer this trade |
| [TS Site Investigation LTD](https://mytrustedtraders.com/traders/ts-site-investigation-ltd-2) | Harrow | 32/100 | 5.0/5 | 2 | Checkatrade, Companies House | Also offer this trade |
| [John McCormack Lofts & Extensions](https://mytrustedtraders.com/traders/john-mccormack-lofts-extensions) | Ruislip | 24/100 | 4.9/5 | 5 | Checkatrade | Also offer this trade |
| [B2bsalesUK TA Thalim construction](https://mytrustedtraders.com/traders/b2bsalesuk-ta-thalim-construction) | Harrow | Not shown | 4.7/5 | 27 | Checkatrade | Also offer this trade |
| [KM Building Services Harrow](https://mytrustedtraders.com/traders/km-building-services-harrow-2) | Harrow | Not shown | 5.0/5 | 25 | TrustATrader | Also offer this trade |

Each trader's full public evidence is at its profile URL (append `/md` for a Markdown version). See all extension / renovation contractors in the United Kingdom at `https://mytrustedtraders.com/find/extension-renovation`.

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Source: MyTrustedTraders. https://mytrustedtraders.com/find/extension-renovation/harrow
Real public evidence only: every figure traces to a named source, and figures are cross-checked wherever more than one independent source covers the same business. If a source does not carry a field, it is not shown.