Rear Dormer

What is a Rear Dormer Loft Conversion?

This form of Loft Conversion is by far the most popular type of Conversion in the UK. The back existing slope is removed and built up vertically from the rear elevation. Rear Dormers are sometimes built directly up from the properties back wall, or in some cases they are stepped in slightly to ensure that the Loft Conversion adheres to the local councils regulations. Although Rear Dormer roofs may seem flat and are even called flat roofs, the external layer of the roof does in fact have a slight slope to allow for rain water to run off and fall into it’s gutter. The Dormers internal ceilings remain completely level.

Benefits of a Rear Dormer Extension

A Rear Dormer Conversion can turn a cramped Attic into a beautifully light open space. This new space can be used for bedrooms, bathrooms or even that airy office you’ve always wanted. With the opportunity to include Velux windows on the front roof, which sits opposite the Dormer Windows, this new space will not be lacking in light. Another popular option for Rear Dormers is to add French doors to the Dormer face for that extra special touch.

Exterior finish options

The exterior finish of a Rear Dormer Conversion can either be brick, tile hung, slate hung, rendered or cladded. If the clients choice is to go for tile or slate, the type will be chosen on site so that they match the existing roof as close as possible. If the plan is to do a rendered finish, we have skilled plasterers who can create lots of different render designs so that it will never be a problem matching the existing. If the client decides on brick, the brick used will match the existing brickwork. Other external finishes that will also match the existing, will be Fascia’s, Soffits, Gutters and Windows. This way the Rear dormer Conversion will look like it was part of the original build.

Will you need planning permission?

If your property has Permitted Development Rights, as long as you adhere to the councils guidelines, a Rear Dormer Conversion can be built under a Certificate Of Lawfulness. A Certificate Of Lawfulness means as long as you build within the guidelines you do not need to wait for the application to be approved before work commences.

If you do not have Permitted Development Rights, you will need to obtain Planning Permission. With Planning Permission you can not start work until Planning Permission has been granted. Once a Planning Application is valid with the council they should issue a decision after 8 weeks.

Here at The Loft Room we will ascertain exactly which permission is needed and we will submit the relevant application to obtain the correct approval on your behalf.

Useful Links:

Click Here for Planning Requirments Click Here for Party Wall Information

Why not contact us to discuss your loft conversion?


We cover Berkshire, Surrey, Hampshire, Middlesex and South West London
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