London's Leading Loft Conversion Specialist

Dormer Loft Conversions

One of the most common types of loft conversions in London is the dormer. It is usually built out of the existing slope of the roof and provides a cost effective way to add extra space to your property. Some types of dormer loft conversions can result in up to 50 cubic metres of additional space, depending on the type of house and the size and style of the extension. In addition, much of the work involved can be carried out from scaffolding outside your home, making for minimal disruption when compared to most other types of home extension.


What is a dormer loft conversion?

It is an extension structure which is built to protrude from the existing sloping roof to create more usable space with additional headroom, meaning that a cramped loft can become a larger, airy room with the new dormer windows providing transformative natural light. There are several different types of dormer loft conversion and the one most suited to your property will depend on your type of house (terraced, semi-detached, detached) and your existing roof shape.

The flat roof dormer is a simple structure that can be added to the front and/or rear of the loft. It provides a fairly simple way to expand the usable space in the loft, increasing head height and providing lots of natural light afforded by the dormer windows.

The shed roof dormer is similar to the flat roof option but its roof slopes down at an angle slightly, may be constructed with different materials and is usually more suited to homes with a gable roof.

The gable fronted dormer, which is sometimes also known as a dog-house dormer is a more complex solution consisting of a gable wall extension which is built upwards to meet the current ridge line, with a new sloping roof section also built towards the new gable end.

A hipped roof dormer is an extension where the roofs slope on all three sides of the structure, often an aesthetically pleasing look especially suited to properties in some styles, but this type of dormer construction results in less usable space in the new loft than for example, a flat roof dormer.


Do dormer loft conversions in London require planning permission?

In most cases, dormer loft conversions in the London area do not require planning permission as long as they fall within the permitted development (PD) conditions for your type of house. If your home is a maisonette or flat or falls within a conservation area or heritage site then different rules apply as to permitted developments. More information about permitted development and the relevant regulations can be found here.

How much do London loft conversions cost?

The cost of a loft conversion in and around London will vary greatly depending on the size, complexity, fixtures and fittings of the proposed work. The average cost of a standard loft conversion starts at around £35k but a Simply Loft surveyor will need to visit your home and discuss your requirements in detail before providing an accurate quote.

Contact us if you would like to enquire about a dormer loft conversion and read our FAQs for more information about loft conversions across the London area.

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