Mansard roof extension with dormers and the creation of self contained residential unit.
Mansard roof extension vs dormer.
4d planning assisted the client with establishing the feasibility of adding another level to create a large mansard roof with rear dormers and use of the roof space as a self contained residential unit in addition to the other four flats within the building.
Now that you have a clear idea about what a gambrel roof is like let us explore the mansard roof in detail.
Dormers usually start at around 40 000 while a mansard is roughly 45 000.
For example the size or square footage what you re looking to get out.
A dormer loft conversion involves extending the roof in a vertical direction away from a sloping rood increasing the floor space as well as the headroom in the property.
The roof remains flat while one outer wall slopes gently inwards.
A slate roof will usually cost more to alter than one with concrete roof tiles.
Just like the gambrel roof the mansard roof features a similar slope design on two opposite sides.
A dormer roof extension can often be done without full planning permission under permitted development rights.
Mansards are typically found at the rear of the house and although they are suitable for many property types they are most popular in terraced houses.
When comparing mansard and dormers you ll often find a dormer conversion to be slightly less expensive than a mansard.
Blends well into older properties.
Mansard loft conversions create a great deal of space ultimately through changing the structure of a roof significantly and therefore often require more work than other types of conversion.
The different types of loft conversions.
A hipped roof dormer loft conversion 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.
Replacing or reinforcing the trusses can take more work and thus increase the costs.
Check guidance notes from your local council.
However on the other pair of sides the mansard roof features the same sloping style.
There are different types of loft conversion that you can have built on your house the main three types are dormer hip to gable and a mansard conversion.
Two options that are available to you are mansard and dormer loft conversions but what are they and what are the differences.
You can find out more about the costs of conversion here.
This type of loft extension is often more expensive than other types such as a dormer or hip to gable conversion.
A mansard roof extension can represent a much more significant change however where full planning permission will almost certainly be required.
Another factor is whether the roof was built with a frame often found in pre 1960s homes or with wooden trusses which are easier to construct but can take less weight.
