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Loft conversions in Hillingdon

Loft conversions in Hillingdon: turn the dusty attic into a bedroom, office or hideaway. Tell us about your roof and up to 3 local builders will quote.

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✅ What your loft conversions covers in Hillingdon

  • A survey of your roof space and structure
  • Velux, dormer, hip-to-gable or mansard options
  • Floor strengthening and insulation
  • Stairs, windows and fire safety
  • Electrics, heating and finishing

💷 Typical loft conversions prices in Hillingdon

Velux (rooflight) conversion£35,000 to £55,000
Dormer loft conversion£55,000 to £85,000
Mansard conversion£70,000 to £110,000
Typical London prices in 2026. A guide only; your quotes will depend on the job.

💬 Questions about loft conversions in Hillingdon

Is my loft suitable in Hillingdon?

Most need about 2.2 metres of head height at the highest point. A builder can check this on a quick visit before you commit to anything.

Do I need planning permission?

Many loft conversions fall under permitted development. Flats, conservation areas and bigger roof changes usually need permission. Ask builders when they quote.

How long will it take?

Often 8 to 12 weeks of building work once approvals are in. Your builder will plan it with you.

📍 Where we find loft conversions in Hillingdon

We find builders for loft conversions across Hillingdon, including Uxbridge, Hayes, Ruislip, West Drayton and Northwood. That covers the HA4, HA6, UB3, UB4, UB7, UB8 and UB10 postcode districts.

Want more than loft conversions?

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