Mansard Loft Conversions

This type of extension originated with French architect Francois Mansard in the 1600s. In this design, the roof is flat, and the back wall slopes inwardly at an angle of 72 degrees. This steep angle allows for the maximization of the space available in your loft. This type of conversion provides maximum headroom and usable floor space.

Windows within a Mansard are usually housed within a box-shaped Dormer which project slightly, enhancing internal space even further and allowing natural light to flood in. Additionally, as the windows sit vertically facing outwards, the Mansard loft conversion looks as though it has always been part of your home. If you’re seeking to super-size your loft space, a Mansard loft conversion is the largest loft renovation you can choose. There are several types of mansard loft conversions, each with its own unique characteristics and benefits. Here are five types of mansard loft conversions to consider:

Full Mansard Loft Conversion

This is the most common type of mansard loft conversion, where the roof is removed and replaced with a mansard roof structure that slopes back at a shallow angle. This type of conversion provides maximum headroom and usable floor space.

L-Shaped Mansard Loft Conversion

This type of conversion is ideal for properties that have a rear extension, where the loft is converted to an L-shape to create additional living space. The L-shape is achieved by adding a hip-to-gable roof extension to the existing mansard roof structure.

Dormer Mansard Loft Conversion

A dormer mansard loft conversion is a combination of a dormer and mansard conversion. This type of conversion adds a vertical wall to the sloping mansard roof, creating additional headroom and floor space.

Hip-to-Gable Mansard Loft Conversion

This type of conversion is ideal for properties that have a hipped roof. It involves extending the existing hip roof to create a gable end, which is then converted into a mansard roof structure.

Planning a Mansard Loft Conversion

Planning is the most critical part of any home renovation project. A mansard loft conversion requires thorough research and analysis to ensure that it is the right option for your home. Here are the steps to follow when planning a mansard loft conversion.

1. Research and analysis: Determine the viability of the project by assessing the condition of your roof, the available space, and the potential obstacles.
2. Acquiring permits and approvals: Check the local building codes and regulations to determine what permits and approvals are needed for the project. Budgeting and cost estimation: Develop a budget for the project, including the cost of materials, labor, and any unforeseen expenses.

Cost of Mansard Loft Conversion

For this type of loft conversion, you may need to get planning permission. The Mansard loft conversion will cost £45,000 and upwards, depending upon the size and your requirements.

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  • Do I need planning permission for a Mansard loft conversion?

    Due to altering the roof structure to a 72-degree angle it is usual to have to seek planning permission for a Mansard loft conversion. Depending on where you live in London there may also be criteria the conversion needs to meet to ensure it matches the character of neighbouring homes.

    We can advise and support you in obtaining any planning permission your conversion might need.

    If you are adding a Mansard to a terraced or semi-detached home, it is also likely that work will be required to the party wall you share with your neighbours. Again, we can advise on steps to take to ensure neighbours are informed and agree with the work before your conversion starts leading to a smooth, stress-free build.

  • What are the Loft conversions building regulations in London

    Converting a loft in the UK typically involves adhering to Building Regulations. These standards ensure that the loft conversion is safe, structurally sound, and meets certain energy efficiency requirements. Here are some key considerations and standards commonly applied:

    Building Regulations: Loft conversions in the UK are subject to building regulations, which cover aspects such as structural integrity, fire safety, insulation, ventilation, electrical and plumbing work, and accessibility. These regulations are enforced by local building control officers.

    Structural Stability: The existing structure of the building must be assessed to ensure it can support the additional weight of the loft conversion. This includes the floor joists, roof structure, and foundations.

    Fire Safety: Loft conversions must comply with fire safety standards to ensure occupants have a safe means of escape in the event of a fire. This typically involves installing fire-resistant doors, smoke alarms, and sometimes sprinkler systems, depending on the size and layout of the conversion.Please refer to Fire Safety Approved Document B

    Insulation: Adequate insulation is essential to ensure the loft space is energy efficient and meets current building regulations. This includes insulation in the roof, walls, and floors to prevent heat loss and maintain a comfortable living environment. Please refer to Part L Building Regulations.

    Ventilation: Proper ventilation is important to prevent issues such as condensation and mold growth. Ventilation requirements vary depending on factors such as the size of the loft space and the number of occupants.

    Electrical and Plumbing: Any electrical or plumbing work carried out as part of the loft conversion must comply with relevant building regulations and be carried out by qualified professionals. See Part P for Electrical Installations and See Part G for Sanitation, hot water and water

    Accessibility: If the loft is intended to be used as a habitable space, it must be accessible via a suitable staircase that meets building regulations in terms of width, height, and gradient. Please refer to Approved Documant K.

    Party Wall Act: If the loft conversion involves work on a party wall (a wall shared with a neighbouring property), the Party Wall Act 1996 may apply, requiring you to notify adjoining property owners and obtain their consent for certain types of work.

    Planning Permission: In some cases, loft conversions may require planning permission from the local planning authority, particularly if the conversion alters the exterior of the property or if it falls within a designated conservation area.

    By working closely with Home Renovation London, you can ensure that your loft conversion project is completed to the highest standards of quality and compliance with all relevant regulations.

  • What space can I create with a Mansard loft conversion?

    A Mansard creates ample habitable space. We work with clients to realise an array of living spaces including:

    Mansard loft bedroom en suite: If you’re outgrowing your home and craving extra room for yourself, children or guests, a Mansard loft conversion creates space for one or two bedrooms and en suite bathroom.

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Benefits of a Loft Conversion

Loft conversions are a great way to add value to your home. By converting your underutilized attic space into a functional living area, you can increase your property's value and add a new room to your home. This can be a cost-effective way to create additional living space without the need for a full-scale renovation.
A well-executed loft conversion by our specialists can add 10–25% to the value of your home. The increase in value can be even higher in areas where space is at a premium, such as London.

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Choose Loft Conversion Specialists in London for Your Project

Here at Loft Conversion in London, we are carrying out many designs and build London loft conversions and turning them into beautiful spaces. Some Londoners require more space for a growing family, but are unable to afford to move house. Others are looking for that one space in the house to truly call their own. Whatever you’re looking for in your project, look no further than Loft Conversion in London.
Loft conversions in London are amongst the most popular home improvements available.

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Professional Installation & Construction

When it comes to Loft / Attic Building, precision and expertise are paramount. Our talented team of loft conversion specialists in London includes skilled craftsmen and builders and they are well-equipped to handle all aspects of the construction process with professionalism and care. From structural modifications and insulation installation to flooring, walls, and finishing touches, our loft conversion specialists execute every detail flawlessly. With our commitment to quality craftsmanship and adherence to safety standards, you can trust us to deliver a superior loft space that exceeds your expectations.

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Transforming Storage Into Living Dreams

Your loft has always just been a loft. But it doesn’t have to remain that way. With a little creativity and expert intervention, it can become the room of your dreams. Why settle for more storage purposes when you can redefine the entire space?

Converting a loft can result in various types of rooms depending on your needs and preferences. You can convert bedrooms, bonus rooms, bathrooms, and home offices.