Looking to add space without extending outwards? A loft conversion in Tonbridge & Malling could be the perfect solution. With house prices rising and floor space at a premium, converting your loft is a smart way to add an extra bedroom, office, or bathroom — without the need to move.

Here’s a detailed look at what a loft conversion costs in Tonbridge & Malling in 2025, and what to consider before you start.

💷 Average Loft Conversion Costs in Tonbridge

Type

Estimated Cost

Rooflight (Velux)

£25,000 – £35,000

Rear Dormer

£40,000 – £60,000+

Hip-to-Gable

£45,000 – £65,000+

Mansard

£60,000 – £85,000+

In Tonbridge, most 1930s and post-war homes are ideal for rear dormers or hip-to-gable conversions due to their roof shapes and generous attic space.

🔧 Local Factors That Affect Pricing

Roof Structure: Older properties in Tonbridge often have traditional timber-framed roofs, which are ideal for conversions. Trussed roofs (common post-1970) can be more complex to adapt.

Access & Staircase Positioning: Fitting stairs into a Tonbridge semi can be tricky — especially if you want to avoid losing a bedroom below.

Planning Considerations: Most conversions are permitted development, but if you’re in a Tonbridge conservation area or altering the roofline substantially, planning approval may be needed.

🧰 What’s Included in an Oakstead Loft Conversion?

Structural works and steel installation

Roof alterations and dormer construction

Insulation and Velux/bespoke windows

Full electrical and plumbing setup

Stair installation

Bathroom installation (if required)

Final decorating and flooring

💡 Local Tip

Many homes in North Tonbridge and Hildenborough have ideal roof heights and layouts for cost-effective loft conversions — and we’ve completed several in those areas.

📞 Call us today to schedule a free site visit in Tonbridge 07940249027
📧 contact@oaksteadconstruction.co.uk
🌐 www.oaksteadconstruction.co.uk