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Loft conversions in N12, North Finchley

Loft conversions in North Finchley (N12): 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 N12 (North Finchley)

  • 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 N12 (North Finchley)

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 North Finchley

Is my loft suitable in North Finchley?

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.

📍 Loft conversions covering N12

N12 covers North Finchley in the London Borough of Barnet. Enter your full postcode above and we'll send your job to builders who work in N12 and nearby, like N2 (East Finchley), N3 (Finchley) and N11 (New Southgate).

Want more than loft conversions?

✨ More jobs for builders in N12