London Loft Conversion Company

Do you feel like the space in your home has become more and more cramped? Are you looking for a way to add value to your current property? Perhaps you know that you want to add an extension or conversion onto your property but are still looking for the right London loft conversion company. If so, then look no further than Firtree Building Services; we have years of experience building loft conversions and house extensions. To find out more about our services, call today on 0800 270 7764.


The team at Firtree Building Services know first-hand that, for many London residents, domestic living space is currently at a premium. For many growing families, rising property prices make it difficult – if not impossible – to upsize their homes. However, we are experts in adding more usable room to your existing property by converting unused space or constructing home extensions. In short, we are your specialist loft conversion company in London.

Unfortunately, countless homeowners simply do not recognise the potential that their loft or attic space offers. In fact, for many, the loft is simply a place to store unused items. However, simply by working with an experienced loft conversion company, London homeowners can create one or perhaps even two additional rooms in their property without taking up any more space.

The benefits of adding a loft conversion to your house are numerous. More often than not, any such project does not require planning permission, which means no long-winded delays or planning issues to contend with. The cost of moving to a new, bigger property (and the high stamp duty costs this will produce) can far outweigh a loft conversion or house extension. Instead, with the help of our expert London loft conversion company, you can invest in your current property for as little as £30,000.

As any reputable loft conversion company in London will tell you, a well-planned loft extension can turn a 2 or 3 bed property into a 4 or 5 bed home. This will add not just space to your house, but also resale value, meaning that a beautiful loft conversion from Firtree Building Services will increase your property’s financial worth.

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07957 574 604

Types of Loft Conversion

There are three main types of loft conversion to consider, and what type will best suit your property depends on a number of factors. These deciding factors include the type of roof that you have, what it is you want to use your loft for, and what your budget is. Here at Firtree Building Services, we are a London loft conversion company that will discuss these factors with you and advise you on the best solution.

The three main types of loft conversion we carry out consists of internal loft conversions, dormer loft conversions, and a loft conversion that requires full removal and build. As your loft conversion company in London, we can talk you through each individual solution. You can also find out more about each type by reading below.

Internal Loft Conversion

An internal loft conversion is generally the most cost-effective solution for any property as it simply involves converting the existing loft space. Our loft conversion company, London residents, will need to carry out very few alterations to your roof space with an internal loft conversion. This not only makes the conversion process much quicker, but also saves you money on more extensive conversions.

The additions we can carry out through an internal loft conversion include windows which are set into your existing roof, insulation, and making the flooring stronger and more secure.

Dormer Loft Conversions

A dormer loft conversion consists of adding dormer windows in order to increase the volume of your roofing space, providing full head height so you are able to stand in your newly converted loft. While these dormer windows are usually added to the rear of the property, if planning permission allows it, they can be added to the front or the side too.

There are different types of dormer windows we can build as your London loft conversion company; single, full-width, side, l-shape, and hip to gable.


These are often utilised in conservation areas, and you can use two, if permitted, to increase your space and provide a symmetrical look.


A full-width dormer spans the length of your roof and maximises the potential space of your loft.

Side Dormer

This is generally used to increase the head height of your conversion on houses that have a hipped roof and where access to the loft is located under the hip.


These are suitable for certain properties, mainly Victorian properties that have an addition to the rear of the property. They increase the space in your loft significantly.

Hip to Gable

This involves one or more of the hips being replaced with a gable wall, with the roof then being extended over the gables. This adds extra space and allows for full headroom too.

Roof Off

This is a loft conversion that requires the roof to be removed and rebuilt, and there are two styles you can choose from; mansard and pre-fabricated.


With a mansard conversion, one or both of the slopes are replaced with a new structure that has steep sloping sides with an almost flat roof. This is used on homes where the original roof had no headroom, creating ample room to add an additional storey to your home. This option generally requires planning permission.


If there is limited space inside the roof, it will be replaced with a much larger one. This involves adding trusses to form the shell before a roof is constructed around them, but this process can take time, leaving you without a roof. However, pre-fabricated units can also be made watertight in a few days.


Once you have decided that a loft conversion is right for you,  make Firtree Building Services your first call. We are an established London loft conversion company with years of invaluable experience in the industry. Our builders take great pride in their work, and offer a finish which is truly second to none. We use only the best materials and work closely with our customers throughout every stage of the loft conversion process.

Firtree Building Services is a London loft conversion company that is versatile and able to take on any part of a building job. We can always meet our customers’ needs, and are just as happy to undertake the whole project from architectural planning to final sign-off, or work alongside your regular contractors. We have a proven record of collaborating successfully with architects, designers, or structural engineers to bring pre-existing plans to life.

Most important throughout this process, however, is you, the customer. We take into account your vision and can identify the right materials to bring it to life. Whether you have a specific look in mind, or simply want the extension to match your home seamlessly, there is no job our London loft conversion company cannot complete. What’s more, we complete most loft conversions in as little as 6 to 7 weeks, giving you peace of mind that your house will not be a worksite for long. We also offer a free, no obligation consultation so that you can let us know right away what works for you.

As well as being your first choice London loft conversion company, Firtree Building Services are proud to say that we:

  • Offer a Ten Year Guarantee on Our Work
  • Are a Which? Trusted Trader
  • Are a Member of the Federation of Master Builders
  • Provide a Free Quotation Service
  • Can Work on Any Part of Your Home Extension – from Planning to Building

We are the London loft conversion company who truly can help you to optimise your space. We have the expertise, commitment, and insight to help you create a new living area that you will love.


To find out more about the services offered by our expert London loft conversion company, customers can call today on 0800 270 7764.