How much is a hip to gable conversion in Teesside?

£40,000 to £55,000 including the rear dormer that almost always goes with it, finished and building-control certified.

How do I know if I have a hipped roof?

Stand back and look at the side of your house: if the roof slopes down towards the side wall rather than ending in a flat triangular brick wall, you have a hip. Most 1930s semis on Teesside do.

Do I need planning permission for hip to gable?

Usually not, it falls under permitted development within the volume limits, but corner plots and conservation areas need checking. Building regulations approval always applies.

How long does the work take?

Typically 8 to 10 weeks on site for hip to gable plus rear dormer.

Will my neighbour's consent hold things up?

Rarely. The party wall notice runs in the background for two months before work starts, and most neighbours consent in writing within weeks. A formal party wall award is only needed if they dissent.

Hip-to-gable loft conversions in Teesside

A hip to gable loft conversion in Teesside costs £40,000 to £55,000 in 2026, almost always paired with a rear dormer. The sloping hip end of the roof is rebuilt as a vertical gable wall, unlocking the full width of the loft on hipped-roof semis and detached houses.

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Roofer in hi-vis working on a house roof during a hip to gable conversion

Why hipped roofs waste half your loft

Thousands of 1930s semis across Acklam, Linthorpe, Hartburn, Fairfield and Norton were built with hipped roofs: the roof slopes inwards on three sides instead of ending in a flat gable wall. Inside the loft, that sloping hip steals a third or more of the usable floor area and all of the headroom at one end of the house.

A hip to gable conversion rebuilds that sloping end as a vertical gable wall, extending the ridge line out to the side of the house. Paired with a rear dormer, which is how they are almost always done, the result is a full-width loft with standing headroom nearly everywhere: a proper master bedroom with en-suite, or two smaller rooms.

What they cost on Teesside

Expect £40,000 to £55,000 for hip to gable plus a rear dormer, finished and signed off. It costs more than a dormer alone because the roof structure is being substantially rebuilt on one side: new gable brickwork or render, extended ridge, new steels, and scaffolding around three elevations. If the neighbouring semi has already converted, matching the pair often smooths both the build and the neighbour conversation.

Is your house a candidate?

Hipped roof: the roof slopes down on the side as well as front and back, standard on 1930s semis and many detached houses of the same era.
Decent existing volume: the bigger the existing loft, the better the return on the structural work.
Neighbour precedent: a converted house next door is the single best sign yours will work, and often means the party wall discussion has already been rehearsed.

Planning permission

Hip to gable conversions usually fall under permitted development, within the same 50 cubic metre volume allowance (40 for terraces), but they are closer to the line than a rear dormer: the works are visible from the side, so corner plots and conservation areas need checking carefully. Building regulations approval applies as always. The planning guide explains how the volume is measured.

The party wall question

On a semi, the new steels and the extended ridge bear into or alongside the party wall with your neighbour, so the Party Wall Act applies: you serve notice, normally two months before work starts. Most neighbours consent without fuss, especially where their own loft is a future project, but the notice period goes in the programme from day one.