London's Premier Loft Conversion & Extension Specialists

With over 30 years of experience in the construction industry,  LMB Group deliver high quality materials and workmanship for your project. Send us your plans and we’ll transform your vision to fruition. 

We are conducting surveys in line with the Government guidelines. This includes social distancing measures- prior to entering your home.

Free survey and written quotation

Full deposit protection guarantee

Professional expert advice given

Fully Qualified and approved staff

Fully-staffed office Monday - Friday

10 year insurance-backed guarantee

Reviews and Testimonials

Loft Conversions Surrey and South London

Welcome to LMB Group – your first choice for loft conversions across South London and Surrey. For more than 30 years, LMB Group has provided a range of top quality, high-spec conversions, leading the way in both design and build.

Our skilled craftsmen and construction professionals deliver bespoke conversions including: Dormer Conversions; L-Shaped Conversions; Hip-to-Gable Conversions; Mansard Conversions; Bungalow Conversions and much more.

We work only with the finest materials and aim, wherever possible, to provide sustainable yet affordable resources for both our residential customers and commercial clients across the South London and Surrey region including areas such as Battersea, Brixton, Bromley, Croydon, Dulwich, Greenwich, Kingston, Richmond, Sutton and Wimbledon.

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Inspirational Design, Exceptional Quality

Are you thinking about redeveloping your South London or Surrey home? Are you in need of extra living, sleeping or office space? If so, then let us help. An LMB loft conversion can transform your home not only by adding a much-needed room but also considerable value to your property.

Our team of fully trained professionals are ready to help you create the house of your dreams – when it comes to an LMB Group loft conversion, the sky really is the limit.

For both our commercial and residential customers, we offer a wide choice of conversion options, which you can read more about here:

Types of Conversion

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Dormer Conversion

One of the most popular loft conversions for customers across South London and Surrey

Dormer Conversion

Remaining one of the most popular loft conversions for customers across South London and Surrey, a dormer loft conversion uses a vertical roof extension to create additional headroom within the property. Internally, a dormer loft conversion has vertical walls and a horizontal ceiling, just like any other room in the house. One of the additional benefits of building such a conversion is that it does not necessarily require planning permission.
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Mansard Conversion

Named after 17th-century French architect Francois Mansard

Mansard Conversion

Named after 17th-century French architect Francois Mansard, this highly individual looking loft conversion is usually situated to the rear of the property. Offering a stylish, flat-roof option, this type of loft conversion has been growing in popularity across urban areas over recent years. A Mansard conversion offers optimum space but almost always requires planning permission from the local authority and is at the higher end of the loft conversion pricing spectrum.
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Velux Windows

These windows have become the go-to option when it comes to providing your new loft conversion

Velux Windows

At LMB Group, quality comes as standard, which is why we only fit industry-leading Velux Windows in our loft conversions. Not only that, but LMB Group is one of the area’s accredited and approved Velux Windows and blind installers. Over the years these stylish, well-made windows have become the go-to option when it comes to providing your new loft conversion with natural light. They come in a range of designs and shapes and can be individually crafted to suit your particular loft conversion.
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L-Shaped Dormer Conversion

Suitable for most properties – and especially more traditional homes

L-Shaped Dormer Conversion

Suitable for most properties – and especially more traditional homes – the L-shaped dormer conversion is often the best choice for mid-terraced houses. It uses two dormer extensions which join together to form an L-shape. Depending on the size of your home, an L-shaped dormer can add anything between 20sqm-50sqm, giving a great deal of extra floor space as well as eaves storage.
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Hip-to-Gable Conversion

A hip-to-gable conversion is best suited to bungalows, detached or semi-detached properties

Hip-to-Gable Conversion

While this may sound a little complicated, a hip-to-gable conversion basically means replacing the sloping part of your roof (the hip) with a vertical wall (the gable). To provide maximum effectiveness and space, you can create a double hip-to-gable conversion, or even combine it with a dormer conversion at the rear. A hip-to-gable conversion is best suited to bungalows, detached or semi-detached properties. It is a great fit with 1930s properties, which is good news for homeowners across the South London and Surrey areas where this style of house is in abundance.
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Finest of Finishes

We pay meticulous attention to detail, and are scrupulous with our time keeping and tidiness

Finest of Finishes

Not only will our highly skilled team of builders, plumbers, carpenters and electricians create a safe, secure and stylish loft conversion but at LMB Group we can also provide a complete painting and decorating service that promises a finish to be proud of. We pay meticulous attention to detail, and are scrupulous with our time keeping and tidiness. We also aim to keep all disruption to a minimum. Customer service is key to the LMB Group offer - not only during the conversion but before and after too.

Get in Touch Today

Our friendly team is on hand to take your call, five days a week from 9am-5pm. We offer a free survey and a written quotation and our work comes with a full, 10-year guarantee. All our staff are fully trained and qualified in line with the highest UK industry standards. Call now on 0208 003 1706 (London) or 01932 282040 (Surrey) or drop us a line, outlining which service you require, to: enquiries@lmbgroupltd.co.uk.