Find trusted local builders in Hammersmith (W6, W14, W12) for loft conversions, extensions, refurbishments and commercial fit-outs. Post a job free — builders contact you within hours.
Rear and side extensions on Hammersmith's Victorian and Edwardian terraces. W6 and W14 properties expertly handled.
Find a builder →Dormer and Velux loft conversions in W6. Mansard conversions in W14. Party wall notices and structural work included.
Find a builder →Rental and owner-occupier refurbishments across W6, W12 and W14. Full project management from strip-out to handover.
Find a builder →Office and commercial fit-outs in White City, Shepherd's Bush and the surrounding regeneration areas.
Find a builder →RSJ installation, load-bearing wall removal, and party wall works. Experienced with tightly-terraced Hammersmith streets.
Find a builder →Garden studios, outbuildings and annexes for properties with outdoor space across W6, W14 and W12.
Find a builder →| Job | Low estimate | High estimate |
|---|---|---|
| Single-storey rear extension | £25,000 | £50,000 |
| Double-storey extension | £45,000 | £90,000 |
| Loft conversion (Velux) | £20,000 | £35,000 |
| Loft conversion (dormer) | £35,000 | £65,000 |
| Full house refurbishment (3-bed) | £40,000 | £100,000 |
| Kitchen extension (open plan) | £30,000 | £60,000 |
| Garage conversion | £12,000 | £25,000 |
| Garden room / studio | £15,000 | £40,000 |
| Basement conversion | £40,000 | £80,000 |
| Party wall agreement | £700 | £2,000 |
| Load-bearing wall removal (RSJ) | £1,500 | £4,000 |
| New build (per m²) | £2,000 | £4,000 |
Prices are estimates for Hammersmith 2026. Actual costs vary by specification, access, and project complexity. Always get multiple quotes.
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Hammersmith spans a broad mix of housing stock — Victorian and Edwardian terraces in W6, larger properties in W14 (West Kensington), and the more modern W12 streets around Shepherd's Bush. Loft conversions are particularly popular in W6, where the tightly-packed terraces lend themselves well to dormer conversions that can create an additional bedroom and en-suite. Party wall agreements are almost always required on these streets, and builders experienced with the area will know the local party wall surveyors and timelines well.
The White City regeneration, centred on the old BBC Television Centre and the associated retail and residential development, has driven strong commercial fit-out demand in W12. Hammersmith's rental market also generates consistent refurbishment work — landlords upgrading properties between tenancies is a major source of building activity across W6 and W14. For any party wall-adjacent project in this area, allow 4–6 weeks for the notice period before work can begin.
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