Hip-to-gable loft conversions · Sevenoaks

Hip-to-gable loft conversions in Sevenoaks

We take on hip-to-gable loft conversions in Sevenoaks as a complete project: survey, drawings, planning or permitted development checks, building control and the construction itself.

Covering Sevenoaks

Sevenoaks is about 14 miles west of Maidstone. We also cover Tonbridge (6 miles to the south-east), Swanley and Tunbridge Wells.

Homes in the South East

Housing across the South East mixes inter-war semis, post-war estates and older cottages in villages and market towns, so rear and side extensions, hip-to-gable lofts and garage conversions all come up regularly.

What is a hip-to-gable loft conversion?

A hip-to-gable loft conversion rebuilds the sloping side (the hip) of a semi-detached or detached house roof as a vertical gable wall, extending the ridge and creating enough space for a staircase and rooms. It is usually combined with a rear dormer.

  • Extended ridge and roof structure
  • Rear dormer and roof coverings to match
  • Staircase, insulation, plastering and electrics

How much does a hip-to-gable loft conversion cost in Sevenoaks?

Use these ranges to budget for hip-to-gable loft conversions; the survey turns them into a fixed price for the agreed specification.

Hip-to-gable loft conversionsGuide price incl. VAT
Hip-to-gable with rear dormer£60,000 to £80,000
Double hip-to-gable (detached house)£70,000 to £95,000

Planning and building rules in Sevenoaks

Projects in England go through two separate checks. Planning (or confirmation that the work is permitted development) comes from the district, borough or unitary council, and building regulations approval comes from the council’s building control team or a registered building control approver. Where work touches a shared wall or digs near a neighbour’s foundations, the Party Wall etc. Act 1996 applies.

In England many loft conversions are permitted development: the extra roof volume must stay within 40 m³ on a terraced house or 50 m³ on a semi or detached house, nothing can sit higher than the existing ridge, no dormer can face a road on the main elevation, and side windows must be obscure-glazed and non-opening below 1.7 m. Houses in conservation areas, National Parks and National Landscapes cannot use these roof-extension rights, so dormers there need planning permission (a rooflight-only conversion can still be permitted development), and flats always need permission.

What should Sevenoaks homeowners check first?

  • Hip-to-gable volume counts towards the permitted development allowance.
  • Scaffolding goes up on the side of the house, which may need a neighbour’s agreement.

What are the steps?

  1. Start with a conversation. A short call or the online form is enough for us to understand what you want to build.
  2. Survey at your house. We look at the existing structure, services and access, and agree what the design needs to achieve.
  3. Design and fixed price. You get drawings and a written price for the agreed specification before anything is ordered.
  4. We build it. Work follows an agreed programme, with inspections at each stage and a final sign-off.

Hip-to-gable loft conversions: common questions

How much does a hip-to-gable loft conversion cost?

Usually £60,000 to £80,000 including VAT with a rear dormer, more on a detached house with two hips.

How long does it take?

About 9 to 13 weeks on site.

How do I get a price for hip-to-gable loft conversions in Sevenoaks?

Use the guide price tool for a ballpark figure, then book a visit for a fixed written price for the agreed specification.

Other towns nearby

Learn more about hip-to-gable loft conversions, or see every project we cover in Sevenoaks.

Planning an extension, loft or new home?

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