Find trusted local builders in Lewisham (SE13, SE6, SE4, SE14) for extensions, loft conversions and refurbishments. Post a job free — builders contact you within hours.
Rear kitchen extensions and open-plan remodelling on Lewisham's Victorian terraces. SE13, SE6, SE4 and SE14 covered.
Find a builder →Dormer loft conversions adding bedrooms and bathrooms across Lewisham. Party wall notices and structural works managed.
Find a builder →Full property refurbishments for owner-occupiers and investors. Period restorations in Brockley and SE4 handled with care.
Find a builder →Commercial refurbishments and fit-outs for retail, hospitality and office occupiers across Lewisham town centre.
Find a builder →RSJ installation, load-bearing wall removal, and party wall works. Experienced with close-terraced SE London streets.
Find a builder →Garden studios, outbuildings and small new builds across Lewisham boroughs with rear garden access.
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 Lewisham 2026. Actual costs vary by specification, access, and project complexity. Always get multiple quotes.
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Lewisham has emerged as one of South East London's most active building markets. Attracted by relative affordability compared to inner London boroughs, a growing number of buyers are purchasing Victorian terraces across SE13, SE6 and SE14 and immediately investing in rear extensions to create the open-plan kitchen-diner living spaces that modern buyers demand. The area's housing stock is predominantly Victorian terrace, which is well-suited to both rear extensions and dormer loft conversions — the latter adding a bedroom and typically a bathroom to properties that often started life as two-bedroom houses.
Brockley (SE4) has seen particularly active gentrification, with higher-specification refurbishments becoming common as property values have risen. The Brockley Conservation Area requires more careful planning attention — Permitted Development rights may not apply to all works in designated streets. Lewisham town centre itself is undergoing significant regeneration, generating commercial building work alongside residential activity. For projects on terraced streets throughout the borough, party wall notices should be served as early as possible given the 2-month notice period before work can commence.
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