Dormer loft conversion

Dormer Loft Conversion

Dormer loft conversion in London is a structural extension built to project from the existing sloping roof of the house. Loft conversion with a dormer creates more usable space in a cramped attic due to the creation of additional headroom and floor space.

Want to know the price of your Dormer loft conversion in london

In addition to that, dormer windows provide natural light for the newly converted room. One of the most commonly used types of loft conversion in London is Dormer. There are various types of options available in London for dormer loft extensions, this depending on the type of your home and existing shape of roofs.

loft conversion with dormer
  • Flat roof is done by adding a simple structure to the existing loft horizontally. It is a simple conversion which offers the largest useable space and helps in getting natural lighting through dormer windows.
  • Shed Roof is more suitable to houses with gable roofs. It is quite similar to flat roof conversion except that it slightly slopes down at an angle.
  • The gable-fronted is done by building a gable wall extension upwards to meet the existing ridgeline along with a new sloping roof section built outwards to the new gable end.
  • Hipped roof provides an aesthetically pleasing option but its main drawback is that it provides less useable space as compared to other conversions. This conversion provides a structural extension where the roofs slope on all three sides and converge at the ridge of the dormer.
  • L-shaped consists of two parts that form an L shape to provide more useable space and headroom in the loft so you can easily turn it into a cosy bedroom.
bright dormer loft bedroom

What is a dormer window?

A dormer window is a form of roof window which adds to the beauty of dormer loft structures. Moreover, dormer windows are a great way to increase the space in the loft and provide natural sunlight to come inside the room; However, not all dormer loft conversions include windows. The decision of building dormer windows usually depends on the architecture of the building and shape of roofs.

One of the most common questions that we get asked is “how much does a dormer window cost?”. The answer to that question depends on various parameters like area, roof type, roof slope, roof architecture, etc. The cost of putting a dormer window inside a roof is £925 but you may have to spend between £600 and £1250 for a complete project.

Do you need planning permission for a dormer loft?

In many cases, you don’t require to get planning permission as long as adding a dormer loft conversion falls under the permitted development. However, best that you get all the necessary information about the conditions and limitations of permitted development before starting the construction. If you are doubtful that your proposed conversion doesn’t fall under permitted development, you should obtain an LDC (Lawful Development Certificate) from the local authority so that you have a written proof that your loft conversion abides by the law.

You will require to get a planning permission for your London loft conversion if:

  • Your property is listed or located in a conservation area.
  • You are altering the shape of roof and its height.
  • Roof lights and dormers are higher than your existing roof.
  • The proposed materials for your loft conversion are not in keeping with the appearance of rest of your house.
  • Your dormer loft conversion features a balcony or a veranda.
  • Your neighbours may get affected by your planned conversion.
  • Bats are living inside your loft. Bats are protected species, so you will need to get a special license to carry out the work that may disturb or affect them

You can find the details and more information about permitted development and planning permission on Planning Portal Website.


how much does a dormer loft conversion cost in london?

The cost of a dormer loft conversion in London is £65.000. The price includes dormer windows, dormer roof, staircase, added insulation, and the costs of electricity, lighting, heating, and remodelling works.

Want to know the exact price? Let Proficiency to quote your London loft project.

Dormer Loft Ideas

Thanks to the variety of options in dormer loft extensions, the possibilities of interior designing are end-less. Depending on your preferences, you can turn the loft into a child room or an adult room. If you want to make it a child’s room, you can put the bed under the nook or the sloping roof to give it a den-like feel and make the bedtime for your child more interesting.

On the other hand, if you want to make it into an adult’s bedroom, you can paint it a soothing colour which could aid you to sleep more peacefully. If you have architectural features in the bedroom, turn them into storage spaces to make the most of them. This will give your room an artistic, luxurious feel and you will surely love spending time in it.

Another idea is to turn the extra space into an en-suite bathroom. Granted, that the bathroom will be kind of small, but that doesn’t mean you can’t make it beautiful. You can fit all the bathroom essentials in the smallest of places by being creative. If you have a sloping roof, you can never go wrong with skylights. Just imagine— taking a warm bath under the stars at night after a long day at the office. How satisfying and calming would that be, right? You will feel your worries melting away.

Clara Annesley

Clara Annesley is an interior design and construction content writer. She holds a BSc (Hons) in Architectural Design Technology from the University of West London. Clara specialises in residential construction for topics like health & safety, architectural design and writing cost guides for renovation and remodelling projects.