loft conversion in swansea

Loft Conversions Wales

Dormer Loft Conversions

A Dormer loft conversion is an extension which is built to protrude from the existing roof slope. It is designed to create more standing space for additional headroom. It is usually at the rear of the property, and the internal requires horizontal ceilings and vertical walls.

It is one of the most common types of conversions in the UK, where a part of the existing roof is removed. Then, the “box frame” structure that projects from the top of the roof height to the rear and sides create bigger space.

Types of Dormer

01/ Gable-fronted dormer

When people think about dormers, they usually imagine the gable-fronted dormer. Why? Because it is one of the most popular types of dormer used in houses today. It is also known as a ‘dog-house dormer’. It’s a more complex dormer which consists of a gable wall extension and a new sloping roof. Gable wall extensions are built upward to reach the current ridgeline and the sloping roof which is mounted toward the gable end. It looks like little houses coming out of the house.

02/ Hipped roof dormer

This looks very similar to gable-fronted dormer, but the roofs slope on three sides of the structure. It looks aesthetically pleasing, but it does not give as much internal space as the flat roof dormer and it is more expensive due to its complexity. With hip dormers you’ll get more headspace than the shed and more horizontal space with a gable dormer.

03/ Flat roof dormer

This is a simple dormer structure mounted to either the front or rear side of the property. It provides a maximum amount of internal space because it increases the head height and also gives more natural light into your loft. However, it does not look as appealing as a gable-fronted or flat roof dormer from the outside of the property.

04/ Shed Roof Dormer

This dormer is a single-planed roof pitched at a shallower angle to the main roof. It is similar to a flat-roof but slopes down at an angle slightly. It usually suits a gable roof, and it extends living space with visual height and width.

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Dormer Attics

the Pros and Cons OF Dormers

Lots of extra space

A dormer loft conversion is built with an extension to the existing roof. Thus, it provides additional room and head height space to your attic. Height restrictions will limit you in maximising your loft, but dormers allow you to make space for big furniture that you wouldn’t otherwise have.

More natural light

Due to the extra space that a dormer provides, you would be able to choose whether to install windows, french doors or balconies. Installing either of these offers more natural light to enter your loft. Thus, you’ll be getting much-better-ventilated space while enjoying the light of the bright sun every day.


By extending the existing space that you have in your attic using a dormer loft conversion you can get additional space for an extra room or even two. It is a cost-effective way to gain more space, especially if you would choose a flat roof dormer loft conversion for your home.

Permitted Development

Most dormer loft conversions don’t need planning permission because it typically falls under the permitted development. It usually depends upon the size and the location of the planned extension, but it is better to check the local authority before starting the project.

Installation time

Dormer loft conversions take more time to construct than a Velux loft conversion, due to the alteration of the roof required to create an extension. It also makes the initial cost of the dormer loft higher than a Velux loft conversion; but, if you’re after the extra space and beautiful appearance and ambience, then your investment would be worth it.


A dormer loft conversion needs more structural changes and alteration to the roof of your home; unlike the Velux loft conversion where you only need to add a window flush to the existing roof. This means that not all properties suit this type of loft conversion. It would be necessary to do a bit of research if your roof is suitable for a dormer loft conversion.  You can also determine what type of dormer loft conversion suits your home through an in-site survey by your chosen loft conversion company or specialist.


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Dormer loft conversions need to comply with the permitted development (PD) conditions for the type of your house; but for most cases it does not require planning permissions.

The cost of dormers varies greatly depending on the size, complexity, fixtures and fittings of the proposed loft conversion work. Standard dormer loft conversions usually start at around £20,000 — however, the average cost for dormer lofts with two bedrooms and an ensuite can cost around £35,000-£40,000. For a more accurate quote, a visit from a surveyor can help.

Traditional roofs measure 2.2 to 2.4 meters high while the minimum height for a modern trussed roof is approximately 2.4 to 2.6 meters. To make the headroom more habitable, it needs 2.3 meters. However, it doesn’t need to be maintained over the whole loft. Lower height is acceptable for a bathroom, corridor or kitchen.

A dormer loft conversion is abundant with natural light from the dormer windows and skylights. You can have side windows but it must be made from obscured glass if it is overlooking your neighbour’s property in order to comply with conditions.


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