A hip to gable loft conversion is constructed on a semi detached, detached or end of terrace house with a hipped roof.
The hip is replaced with a new gable wall and the existing roofline is extended to meet it. The new gable is usually built up in brick, or rendered/pebbledashed to match the existing gable wall.
Once the new roof line has been built, a dormer is built on the rear of the property.