Commonly constructed at the rear of the property, a dormer is a structural extension to the existing roof which protrudes vertically from the plane or sloping roof. Internally, a dormer has vertical walls and a horizontal ceiling. Most of the construction work is conducted externally using scaffolding at the front and rear of the house- this means that there’s less disruption to the rest of the property. Dormers are versatile as they can be built on different styles of homes, including terraced houses, end of terrace, semi detached and detached houses. Dormers can accommodate windows as well as French doors.
Generally, if you meet your borough's criteria, a dormer loft conversion can be carried out under permitted development (with no need for planning permission). However, it's important to be aware of the specific conditions and limitations of permitted development. If you are unsure as to whether your proposed conversion passes the permitted development tests, we recommend obtaining a Certificate of Lawful Development (COL), from your local authority. If you wish to sell your property in the future, for example, this acts as a safeguaed as it provides you with written proof that your loft conversion is lawful.
However, you will need Planning Permission if: