So you have decided to have a loft conversion? Now you need to decide what type of loft conversion is best for you and your house. There are a number of things to consider when deciding on which type of loft conversion to add to your home such as planning permission, the costs involved, the time it will take and how you would like to use the space.
In this guide, we compare Mansard loft conversions and Dormer loft conversions to help you to decide which option may be best for you and your home.
What is a Mansard Loft Conversion?
A Mansard loft conversion is a roof extension that replaces one or both roof slopes with new, nearly vertical walls (usually 72 degrees) and a flat roof. Due to the construction of Mansard conversions, they offer the biggest increase in living space as well as blending into the existing building.
What is a Dormer Loft Conversion?
A Dormer loft conversion is a box-like structure added to the existing roof of your home to increase the space inside the attic. Dormer loft conversions are versatile and can be customised to your property. Dormers also typically have a flat roof.
What is the Difference Between a Mansard and Dormer Loft Conversion?
When it comes to mansard vs dormer loft conversions, the difference is the amount of structural changes required to the roof. Dormer loft conversions extend through the existing roof structure whereas Mansard loft conversions change the roof shape to a near vertical wall.
Common Questions About Dormer Loft Conversions.
Dormer loft conversions are a popular choice for homeowners looking to increase living space within their homes without building ground-floor extensions. Dormer loft conversions are a cost effective way to maximise headroom and natural light within the loft space.
Do I Need Planning Permission for my Dormer Loft Conversion?
In most cases, Dormer loft conversions can take place under permitted development rights however, there are some exceptions to this such as if your house is listed or in a conservation area. Our experienced loft conversions experts can consult with you to ensure full planning compliance whether this is through permitted development or planning permission.
How Long Does a Dormer Loft Conversion Take?
As Dormer loft conversions require some structural work, you can expect the work to take between 4-6 weeks to complete.
How Much Does a Dormer Loft Conversion Cost?
As Dormer loft conversions are so versatile in style and size, every project is different. At Alvaston, our team can give you a bespoke, competitive price which takes into account the requirements and your personal preferences.
Common Questions about Mansard Loft Conversions.
Mansard loft conversions can be added to most types of houses including terraced, semi-detached, detached and bungalows.
Do I Need Planning Permission for my Mansard Loft Conversion?
Typically, Mansard loft conversions do require planning permission as they can exceed the permitted development limits. We will handle all planning permission requirements as well as building regulations and are happy to answer any questions you may have.
How Long Does a Mansard Loft Conversion Take?
Due to the structural changes required to complete a Mansard loft conversion, it typically takes up to 8 weeks to complete. This does not include the time for planning permission to be obtained.
How Much Does a Mansard Loft Conversion Cost?
At Alvaston Loft Conversions, our competitive quotes are bespoke to your project and take into account the size and complexity of the conversion. We include design drawings, navigating building regulations and planning permission as well as the costs of the build and bespoke staircase. All you will need to think about is how to decorate your new space.
Are Mansard Conversions More Complicated?
Mansard loft conversions are the most extensive of all loft conversions as they include major structural changes to your home. However, they are the most integrated of all loft conversions and provide the largest increase in living space.
Mansard vs Dormer Loft Conversion: Which is Best For My Home?
As with any big decision, it comes down to budget, timescales and the final outcome you are looking to achieve.
To make the comparison of mansard vs dormer loft conversions easier, we have outlined the main points here:
| Mansard Conversion | Dormer Conversion | |
| Structure Type | Replacing the roof to near vertical slope and a flat roof | Box added to the existing roof |
| Level of Structural Change | High Level – full structural changes to the roof | Moderate level – added to the existing roof structure |
| Internal Space | Creates the maximum additional floor and headspace | Adds additional headroom in the dormer portion of the extension |
| Planning Permission | Likely to be required | Likely to fall under permitted development |
| Aesthetics | Blends more seamlessly into the existing structure | Box-like clear addition to the existing structure |
| Typical Time to complete works | 8-12 weeks | 4-6 weeks |
Not sure which conversion would be best for your home? Talk to our trusted experts today on 01922 402720 or contact us and we can plan your loft conversion together.
