Mansard Loft Conversion Architects

A mansard loft conversion is a type of roof conversion that involves altering the shape and pitch of the existing roof to create additional living space. This is achieved by extending the sloping sides of the roof to create a nearly vertical wall, known as a “cheek wall”, which is then topped by a flat roof with a slight slope. The result is a distinctive style of roof that is commonly found in urban areas and historic buildings.

The process of creating a mansard roof involves various technical aspects, including the use of structural steelwork to support the weight of the new roof and the installation of dormer windows to provide natural light and ventilation. A mansard loft conversion typically requires planning permission due to the significant changes to the roof structure and appearance of the building.

Other technical considerations include insulation, fire safety measures, and the installation of plumbing and electrical systems to accommodate the new living space. The design of a mansard loft conversion may also involve integrating features such as skylights, balconies, or green roofs.

Overall, a mansard loft conversion is a complex and sophisticated construction project that requires careful planning, skilled design and engineering, and the use of specialized materials and techniques.

A mansard loft conversion is often considered one of the most costly loft conversion types due to the need for skilled labourers and the typical size. You can expect, on average in 2022, to spend approximately £1800per square metre + VAT, and this will include the complete shell of the conversion and reinforcement of the existing floor. As expected, the final project cost can vary greatly depending on the level of internal finishing your require.

Our team of mansard loft conversion architects, designers and project managers will work with you closely to define the brief and ensure that your project is feasible and within budget every step of the way.

On average, you can expect to spend anywhere from £70,000 to £120,000 for your mansard loft conversion up to completion. However, the rewards of this investment can highly boost the value of your home, with most London Boroughs valuating a singular square meter anywhere from £5000 to £30,000! By extending upwards and creating a mansard loft conversion, you are essentially adding an entirely new storey to your existing property!

The rewards of doing so can be huge, and can boost the value of your home by almost 25% in total! The vast space created could be used as an additional bedroom or two, plus a new bathroom or en-suuite, depending how large the footprint of your property is. This makes it one of the most space-maximising extension types commonly seen today.

However, before you consider a mansard loft conversion, it is important to speak with an experienced loft conversion architect near you to determine the feasibility and buildability. A good, local architect will be able to help you navigate the often strict council guidelines on mansard lofts, and give you the best chance of planning approval first time.

Our professional team can support the initial concept design to detailed interior design, followed by project management to completion with our local, fully vetted construction professionals who offer competitive build quotes. No matter the size of your mansard loft conversion, Extension Architecture is here to help.

Following an initial phone consultation, one of our experienced surveyors will visit your property to get the ball rolling. At this stage, we will work alongside you to develop the brief and ensure that we can generate a feasible proposal that aligns with both your priorities and the requirements of your local planning authority. Contact us today to organise an initial consultation and receive a personalised quote if you are looking for architectural services!