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A mansard loft conversion is a type of loft conversion which makes use of the sloping sides of a roof to create additional headroom and floor space. It is one of the most popular types of loft conversions, as it can add a significant amount of space to a property. Mansard loft conversions are usually only suitable for properties with hipped roofs, as this is the only type of roof which has the required slope. However, if your property does have a hipped roof, then a mansard loft conversion could be the perfect way to make use of the available space.

What is a mansard loft conversion?

A mansard loft conversion is a type of home improvement project that involves adding an extra level to your home by converting the roof space into additional living space. This can be a great way to add value to your property and get more use out of your home, but it is important to understand what is involved in such a project before getting started.

One of the main benefits of a mansard loft conversion is that it can provide you with a significant amount of extra living space without requiring you to move house. This can be especially beneficial if you live in an area where property prices are high and finding a bigger home would be difficult or expensive. Mansard loft conversions can also be much cheaper than moving house or extending your existing home, making them a great option if you’re on a budget.

Another benefit of mansard loft conversions is that they often don’t require planning permission, unlike other types of home improvement projects. This means that you can usually get started straight away, which can be ideal if you’re keen to make the most of your new space as soon as possible.

The potential downside of mansard loft conversions is that they can be disruptive and messy, so it’s important to be prepared for this before getting started. You’ll also need to factor in the cost of any necessary structural work, which will vary depending on the size and complexity of your project. However, many people feel that the potential benefits outweigh any drawbacks, making mansard loft conversions an attractive

Why choose a mansard loft conversion?

Mansard loft conversions are becoming increasingly popular, and for good reason. Here are just a few of the benefits of choosing a mansard loft conversion:

1. Mansard loft conversions can add a significant amount of extra living space to your home.

2. The sloping walls of a mansard loft conversion can create an interesting and unique interior design.

3. Mansard loft conversions can be relatively straightforward to carry out, and can often be completed within a matter of weeks.

4. A mansard loft conversion can add significant value to your property, making it an excellent investment.

So if you’re thinking about carrying out a loft conversion, a mansard loft conversion could be the perfect option for you.

How much does a mansard loft conversion cost?

There are a few factors that will affect the cost of your mansard loft conversion, including the size and condition of your property, the amount of work required, and whether or not you need planning permission. Generally speaking, a mansard loft conversion can cost anywhere from £15,000 to £30,000.

If you’re thinking about having a mansard loft conversion carried out on your home, it’s important to get several quotes from different contractors to ensure you’re getting the best possible price.

1970's Mansard roof houses
Mansard roof

Mansard loft conversion process

A mansard loft conversion is a type of loft conversion that involves adding a new storey to the existing roof. This is usually done by converting the existing attic space into a new room, or by extending the roofline upwards to create additional space.

The mansard loft conversion process typically involves:

1. Planning and design: The first step is to consult with an architect or builder to discuss your plans and get drawings drawn up. You will need planning permission for this type of conversion, so it’s important to make sure your plans are in line with local planning regulations.

2. Structural work: The next step is to carry out any structural work required to support the new storey. This may involve strengthening the existing walls and ceilings, or installing new supports such as steel beams.

3. Roofing: Once the structural work is complete, the roof can be extended upwards and new roofing materials installed. This part of the process will vary depending on the specific design of your conversion.

4. Windows and doors: New windows and doors will need to be installed to provide access to the new space. Again, the specific details will depend on your individual design.

5. Internal finishes: The final step is to add any internal finishes you desire, such as plasterboard walls, flooring, lighting, etc. Once everything is complete, you’ll have a brand new mansard loft conversion that adds valuable extra space to your home!


Mansard loft conversions are a great way to add extra living space to your home. They are also relatively easy to do, and can be completed in a short amount of time. If you are considering doing a mansard loft conversion, be sure to consult with a professional first to get an accurate estimate of the costs and time involved.