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Semi Detached Loft Conversion

Semi Detached Loft Conversion

Semi detached houses tend to offer some of the best options for a loft conversion, largely because of their roof shape. Many semi detached homes, particularly those built in the 1930s, have a hipped roof on the side facing away from the neighbouring house, which makes them well suited to a hip to gable conversion. This turns that sloping side into a flat vertical wall, adding useful headroom and floor space that a house with two hipped sides simply does not have available.

Because only one wall is shared with a neighbour, party wall matters are usually simpler than with a terraced house, involving just one household rather than two. It is common to combine a hip to gable conversion with a rear dormer on the same project, since together they can make the most of the space available without needing planning permission in many cases, depending on the size and location of the house.

Who this for

This applies particularly well to 1930s semi detached houses, which are common across many outer London suburbs and often have the hipped roof shape that suits a hip to gable approach. Newer semi detached homes can also suit this service, depending on their roof shape.

Project Process Steps

We survey the roof to confirm the hip shape and check whether combining a hip to gable with a rear dormer makes sense for the space available.

We issue a party wall notice to the one neighbouring property affected, which is usually more straightforward than a terraced house project involving two neighbours.

The hipped side is rebuilt as a vertical gable wall, and the rear dormer, if included, is built at the same time.

Once the roof structure is complete, the project moves into the usual interior stages of plumbing, electrics, insulation and finishing.

Frequently asked questions (FAQ)