A loft conversion in Merton is one of the most cost-effective ways to add living space to a South London property without extending outwards. Costs typically range from £25,000 for a basic room conversion to £80,000+ for a full multi-room scheme with ensuite facilities. Prices depend on your roof structure, planning permission requirements, building regulation sign-off, and the complexity of structural work. Merton's mix of Victorian terraces, Edwardian semis, and post-war estates means every property presents different challenges—and opportunities. BizHub365 connects you with local loft conversion specialists in Merton, Wimbledon, Colliers Wood and Raynes Park who understand the borough's planning landscape and can give you a realistic quote based on your home's individual circumstances.
Loft Conversion Specialist Prices in Merton
| Service | Typical Cost | Unit |
|---|---|---|
| Structural survey and planning drawings | £800 – £1500 | per project |
| Basic dormer loft conversion | £35000 – £55000 | per project |
| Mansard loft conversion | £50000 – £80000 | per project |
| Velux/roof light installation | £1200 – £2500 | per window |
| Structural steelwork and beams | £5000 – £12000 | per project |
| Building Regulations approval and inspection | £400 – £800 | per project |
| Plasterboarding and internal finishing | £8 – £15 | per m² |
| Staircase installation | £2500 – £5000 | per project |
Prices are indicative averages for Merton. Actual quotes will vary based on job specifics.
What Affects the Cost?
Loft conversion costs in Merton vary significantly based on the type of conversion—dormer conversions are the most common and affordable option, while mansard conversions command higher prices due to increased structural complexity. Your existing roof pitch, ceiling height, and whether you need new structural steelwork all impact the final bill. Access difficulties in terraced properties along Merton High Street or the Wimbledon Park area may increase labour costs. Building Regulations approval and structural engineer surveys are mandatory and add to overall project costs. Material quality, specialist contractor availability, and the extent of internal finishes—from basic plasterboard to fully fitted bathrooms—also drive pricing variation.
Money-Saving Tips
Book your survey and planning drawings early: many Merton loft conversion specialists offer free initial assessments. Bundle structural steelwork, plasterboarding, and electrical work with a single contractor to reduce site-setup costs. Request quotes from 3–4 local specialists and compare what's included—some quote excluding Building Regulations fees or structural engineering, which can add £2,000–£3,000 to your total.
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