What is a hip-to-gable loft conversion?
A hip-to-gable loft conversion replaces the sloping side (the hip) of a semi-detached or detached roof with a vertical gable wall. This extends the ridge and creates enough space for a staircase and a full-size room, usually combined with a rear dormer.
How much does a hip-to-gable loft conversion cost in Northumberland?
In Northumberland, a hip-to-gable loft conversion typically costs £49,500–£70,000 for a hip-to-gable with rear dormer, including VAT at 20% (standard rate). Prices across the North East are typically 10% below the UK average for this kind of work, which is reflected in the range for Northumberland. Design, structural calculations and council fees are extra.
| Size or type | Guide range |
|---|---|
| A hip-to-gable with rear dormer | £49,500–£70,000 |
| Higher specification | £70,000–£87,500 |
What moves the price most:
- Staircase design
- Bathroom and plumbing
- Scaffolding to three sides
- Gable wall construction and finish
A guide range is only a starting point: the guide price tool gives an instant figure for your size, and a free survey turns it into a fixed quote.
Do you need planning permission for a hip-to-gable loft conversion in Northumberland?
Whether you need planning permission depends on your house and its location in England. In England a hip-to-gable conversion is often permitted development within the 50 cubic metre roof volume limit for semi-detached and detached houses, provided the gable does not face a road and the house is not in a conservation area.
Building regulations approval comes from the council’s building control service or a registered building control approver. The work is inspected at key stages, such as foundations, drainage and insulation, and a completion certificate is issued at the end.
At the survey we check your house’s planning history and any restrictions, and tell you which route applies.
What we handle
The work we manage on a hip-to-gable loft conversion:
- Steel beams and floor joists
- Staircase and fire-safe escape route
- Building control sign-off
- Insulation, electrics, plumbing and plastering
- Gable wall built in brick or block and finished to match
- Roof extension and rear dormer
How long does it take?
The build itself usually takes 7 to 10 weeks on site. Before that, surveys, drawings and approvals usually take 6 to 12 weeks, longer if the council asks for changes.
Building in Northumberland
Across the North East, colliery-era terraces and newer estates sit side by side, so the right project depends on the house type.
Towns we cover in Northumberland include Blyth, Cramlington, Ashington and Bedlington.
How it works
- 01
Survey and brief
We visit, discuss your ideas and budget, and survey the property or site at no cost.
- 02
Drawings and written quote
We prepare the design and give you a written, itemised quote with inclusions and exclusions.
- 03
Approvals
Planning or permitted development confirmation, building regulations and any party wall matters.
- 04
Build and sign-off
We run the build to a written programme and hand over the completion certificate.
Questions about hip-to-gable loft conversions in Northumberland
Is a hip-to-gable better than a dormer?
On a hipped roof, a dormer alone often leaves too little space for stairs. Combining hip-to-gable with a rear dormer gives the most room.
Do you build hip-to-gable loft conversions in Northumberland?
Yes. We build hip-to-gable loft conversions across Northumberland, including postcodes CA9, DH8, NE15, NE18 and NE19. Every project starts with a free home visit.
How much does a hip-to-gable loft conversion cost in Northumberland?
In Northumberland, a hip-to-gable loft conversion typically costs £49,500–£70,000 for a hip-to-gable with rear dormer, including VAT at 20% (standard rate). Your fixed price depends on the survey and drawings.
Can the gable be brick?
Yes. We match the existing finish, whether brick, render or pebbledash.
How long does it take?
Typically 7 to 10 weeks on site.