Loft conversion in London

Loft Conversions London

Proficiency Design & Build is one of London’s finest luxury loft conversion specialists. With hundreds of exquisitely designed and impeccably finished loft conversions completed throughout the capital over the last decade. If you want innovation, craftsmanship and care, you need to hire the best loft conversion company in London. And there are no better lofts than those created by Proficiency.


If you can dream it we can build it for you. Our design team are masters at converting lofty wish-lists into loft reality.

Innovation, Style and Craftsmanship

If you’re looking to extend upwards into your roof space to add an elegant new master bedroom with en suite, a light and airy art studio, a home office or a playroom for the kids… If you want the sun to stream in through generous double aspect Velux windows, a floor to ceiling glazed wall or through the doors to your balcony… If you need extra head height, space at home or somewhere to escape to for a little relaxed ‘me’ time… Then our team of skilled architects, interior designers and tradespeople will make it happen.

luxury loft conversions
high quality lofts
small loft living room

Step by Step, What to Expect from your Builders



For maximum head height and great floorspace there’s the dormer loft extension, providing far more useable space than a simple Velux conversion.

Hipped Roof

When your roof doesn’t lend itself to the loft conversion you’re looking for, our team of designers and builders will change its structure to fit your needs.


One of the simplest loft conversions is where we make your existing loft space habitable and use Velux windows to allow the light to stream in.


For even more space, this style of loft conversion covers the entire pitch of a roof. A little like a dormer conversion, but with the vertical wall at 72 degrees.

End-to-End London Loft Conversions Service

When considering a loft conversion in north London or anywhere across the capital you will no doubt have a million questions – from those related to complex planning permission, project timing, amount of disruption to you and your neighbours, to the finesse of interior design – Proficiency is here to answer them all. Our end-to-end loft conversion service means that we’re with you throughout, listening to your needs, actioning your wishes and answering your questions, from the moment you call to book an initial discussion to the day we complete your project.


  • Quality craftsmanship: Our company takes pride in their work and produces high-quality results that will set themselves apart from their competitors..
  • Experience: Proficiency has been in business for a long time and has completed many successful projects will have the expertise to handle any challenges that arise during a project.
  • Customer service: Our company puts its customers first and provides excellent customer service will ensure that their clients are satisfied with the entire process, from start to finish.
  • Communication: Our team communicates clearly and regularly with its clients to ensure that everyone is on the same page and that there are no misunderstandings or surprises.
  • Competitive pricing: Our company offers fair and competitive pricing that will provide their clients with value for their money.
  • High-quality materials: Proficiency uses high-quality materials in their projects which will ensure that the finished project is durable, long-lasting, and of the highest quality.


luxury loft master ensuite bedroom
Russell Gardens, Holland Park

House & loft renovation
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navy blue kitchen
Islington, Canonbury

Rear Extension
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Cambridge Road, Twickenham

Extension & Loft Conversion
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Hillfield Road, West Hampstead

Wrap Around Extension
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What Does a Luxury Loft Conversion Cost

We would love to provide you with a simple fee chart, but it just does not exist as every loft conversion project we work on is wholly tailored to our client’s exacting specifications. There will be limitations created by planning permission, the footprint of the property and whether your home is in a conservation area or is a listed building – all of which makes our work more challenging, but we do like a challenge – but beyond this it totally depends on how vivid and expansive your loft conversion dreams are. What I can assure you of is our commitment to quoting clarity and our record of bringing projects in on budget and on time.

Building a room

Request A Free Quote

To find out how Proficiency, a refurbishment company in London can help you transform your home, contact us today. We’re here to answer any and all questions or to book a time that’s convenient to you for one of our team member to come round to discuss your plans.


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