Loft Conversions London

  • Specialist Loft Conversion Builders in London
  • 20+ Years of Experience
  • Bespoke Loft Conversion Designs
  • 10 Year Guarantee
  • Fully Compliant with the Latest Building Regulations
  • £5 Million in Insurance Cover

Find our more about Loft Conversions. Call Us Today


Clapham Construction: Specialists in bespoke Loft Conversions in London. We focus on custom-designed lofts tailored to your style, offering affordable and efficient loft transformations. Each loft conversion is specifically made to meet your needs, ensuring a smooth journey towards your ideal London loft with great satisfaction.


A loft conversion is the process of transforming an unused loft space into a functional room. While these spaces are often converted into bedrooms, the possibilities for their use are endless. Loft rooms can serve as:

Loft conversions are one of the most effective ways to add significant value to your property, offering an impressive return on investment when compared to other types of home improvements. In the bustling city of London, where space is at a premium, loft conversions have become a popular solution for homeowners seeking to maximise their living space.


Home improvements come in many forms, but one of the most transformative and beneficial changes a homeowner can opt for is a loft conversion.

  • Maximised Space: Transform unused areas into functional spaces.
  • Increased Property Value: Boost the market value of your home.
  • Cost-effective Expansion: Often cheaper than moving or traditional home extensions.
  • Energy Efficiency: Modern conversions can improve insulation, reducing energy bills.
  • Personalised Aesthetics: Customise the space to your unique taste and needs.

Considering a loft conversion not only provides homeowners with additional functional space but also offers a cost-effective way to enhance property value and improve energy efficiency.

Transform Your Space with a Loft Conversion. Get in Touch Now!

Recent Loft Conversion Projects

View a selection of our loft conversion projects in London below

Tybenham Road
Rear Dormer

Merton | London

Talma Road
L Shaped Rear Dormer

Brixton | London

Tremadoc Road

Mansard Conversion

Putney | London

Plough Road
Mansard Loft Conversion 

Battersea | London

Glenister Road
Rear Dormer

Streatham | London

Rudloe Road
Rear Dormer

Balham | London

Quill Lane
Mansard Conversion

Putney | London

Newstead Road
Rear Dormer

Catford | London

View Our Design and Build Process

Check out the work of our amazing teams and
what we can achieve in your home

Have your say…


Nicholas Carpenter
Nicholas Carpenter
Clapham Construction have done a great job on our loft conversion and we are very pleased with how smoothly the project went, and the brilliant loft space that we now have. Paul - thank you especially for guiding us through all the stages before and during the build. Their workmen were hard working from start to finish, efficient, and obviously very skilled. They were also polite, helpful and really tidy. We had great communication by email with their office, and with Paul in person and on the WhatsApp group - thank you. Our family in USA are now looking forward to staying with us in comfort this summer and beyond!
Bianca Hamilton
Bianca Hamilton
Paul, Dangis and the team are simply top notch. They did such a high-quality job on a tight timeframe and communicated so well throughout. They were a pleasure to work with, handled all elements of the build from start to finish and kept disruption as minimal as they could. Couldn’t recommend them more highly if I tried.
Mindy Lee
Mindy Lee
Thank you Clapham Construction! Your team were friendly, efficient, and highly motivated. The project ran to schedule with effective overlapping of tasks to allow for minimum disruption. Paul kept us actively involved at each stage of the process, so we always knew what was happening when, which was really reassuring. If we ever had a question, he would talk it through with us in person and offer advice without any pressure or expectation. The work is completed to an excellent standard. All the construction workers where kind, considerate, friendly, polite and kept our house as clean and tidy as possible. This took so much of the stress out of living on site during the works with a young son. Even the neighbours commented on how polite and considerate the builders had been. We would highly recommend this team for anyone thinking of undertaking a loft conversion in the future.
Shayan Bokhari
Shayan Bokhari
Paul, Dangis and their team were excellent given we had some obstacles with the council on design, they accommodated what we required. The work was very professional and communication was on point. We are very happy with our end result and any teething issues they resolved quickl. I would recommend the team to anyone. Thanks again for all your hard work.
Laila A
Laila A
Really lovely team - all professional, friendly and was great to have Dangis and Paul popping in regularly and being on the ball with the project. Happy with our new loft, all work done to an excellence standard, any follow up questions or issues dealt with quickly. Would highly recommend. Thank you very much.
Dani Carter
Dani Carter
Absolute professionals is the first thing that comes to mind when I think of Clapham Construction service. And there are two further things you need to know about them: they are brilliant at what they do and they are generous in spirit. Throughout our project Paul and Dangis answered our naive questions with warmth and care. They helped guide us at every turn, and almost certainly saved us money by making sure we considered all the options we had before making key decisions. But not just customer care, the building work is also top notch. The build itself was a well oiled process, coordinated with skill. I was initially worried about getting an anonymous loft company I'd never heard of in (after getting 8 different quotes from a variety of places including famous local ones) and being part of the 'box on the roof' brigade. Yet somehow, they have created build magic with some tweaks on 'a little bit of height' here, and 'a little configuration' there. We keep marvelling at the sturdiness and smoothness of the physical build even now, and the army of highly skilled teams they have were a pleasure to host in the house while we worked from home. And finally the most important bit - the money stuff- our Loft extension (including bathroom) was completed on time and more or less on budget. The additional costs were the unforseen - (yikes a victorian chimney needs dismantling!) and a few flourishes that we ourselves added to the mix - (can the door handles be gold?). Any additional build costs were communicated efficiently and immediately. Our experience of Clapham Construction is that they are patient, hugely knowledgable, and detail orientated with a wealth of incredible advice. Don't delay on getting them on your project!
Mikey Johns
Mikey Johns
We spoke to a few companies to quote our dormer loft conversion but were immediately impressed speaking to Dangis & Paul and went with Clapham CS. We’re really happy with the end result which has given us some much needed extra space. Progress was quick, these guys are very experienced and know exactly what they’re doing. They’ll talk you through your plans and give you honest advice at key stages when you need to make a decision, very patient with us too! Would definitely recommend, they’ve done numerous houses in our neighbouring streets too, end results always look great.
Maria Luisa McKendry
Maria Luisa McKendry
Highly recommend this company. As first time buyers and first time renovators we couldn't be happier with their service. Paul and Dangis are very professional and thorough, at no times does it feel like corners are cut. They are able to provide genuine advice and guidance while being accommodating ensuring a stress free process.
Stuart Williams
Stuart Williams
Clapham Construction completed our kitchen extension for us. We’re really pleased with the results, and it has changed the whole place. The price was agreed upfront and there were no hidden extras. Good communication throughout the whole process on WhatsApp and Dan showed great building experience. They had the whole team from build, kitchen fitting through to finishing the garden off available in house so made it a lot easier. Thanks guys.
Tom Forman
Tom Forman
We are delighted with our new loft conversion, Clapham Construction did a great job. They were highly professional, no hidden costs, and with friendly employees who treated the rest of the house with respect. We would not hesitate to recommend them.


Explore the multitude of loft conversions, each designed to optimise and enhance your property. Whether you’re in need of extra space, planning for a home expansion, or simply wanting to utilise unused areas, our dedicated team is committed to bringing your vision to fruition. We provide complimentary consultations and estimates, so don’t hesitate to connect with us today. Your journey to a transformed loft space is just a call away!

There are several types of loft conversions, each offering unique benefits and being suited to different types of properties:


You might think “can any house have a loft conversion?”. However a loft conversion in your dwelling might be possible, depending on several factors, including the structural integrity of the existing building, adherence to local building codes, and potential need for planning permission.

The ownership of the property and any agreements with neighbors or shared walls (party wall) may also play a role. Consulting with a local architect or builder who is familiar with the rules and regulations in your area will help determine the feasibility of this project. Other considerations, such as budget and design preferences, will also influence the decision.

To help you understand types of loft conversion we have laid them out for you here to gain a better understanding. During the free home consultation we will help you choose the right one for you and your home.

Also known as rooflight conversions, Velux conversions install windows into the existing roof slope without altering the roofline, making lofts bright and airy.

A variation of the dormer conversion with two windows, it offers more light, ventilation, and enhances property aesthetics.

Popular in London, it extends the roof for more floor space and headroom, fitting most house types.

Combines hip-to-gable and dormer techniques, transforming small lofts into spacious living areas.

Extends the ridge line of hipped roofs to form a gable end, enlarging the loft space.

Merges hip-to-gable and dormer methods, converting small lofts into roomy, functional areas.

Extends over the property’s back addition with a simpler structure than the L-shaped mansard, ideal for adding rooms or open layouts.

Alters the roof structure for a larger space, commonly seen in terraced houses in London.

Increase Your Home’s Value. Enquire About Loft Rooms Today!


Over the years we have carried out hundreds of home renovation projects, especially loft conversions in London.

We are proud of every project we work on to turn disused spaces into beautiful rooms for our clients and families.

In London loft conversions are popular, where space is at a premium and still a family city, more space is often required.

Perhaps you want that spare bedroom for guests, a home office or want to develop your property for sale or rent.

Whatever you’re looking to do with your attic conversion in London, Clapham Construction Service has already done it for someone else and we can do it for you too.

Remember these are fully completed and decorated, to give you an idea of space, quality, and possible finish, but every house is unique and so is every building service we provide.



Loft Conversion Complete Process

We manage the design and build for you, planning permission, structural design, building control and your project manager will be on your site almost daily to oversee the works and keep you updated.

Quality Craftsmanship

Our works are warrantied, but they will stand much monger than that. We are builders primarily and our teams are experts with quality on our mind – you will get weekly inspections by the owner to ensure we deliver.

10 – Year Warranty On All Loft Conversions

Exactly what it says. We provide you with a warranty to cover you and your home for any defect from our works so you don’t have to worry. In addition you get an independent certificate by the regulators confirming that our works meet the approved building standards.

Attic Conversions Add Value

Getting A loft or attic conversion with us can add up to 25% to the value of your home, making it one the best investments you can make.

Unlock the Potential of Your Loft. Speak to Our Experts!

Want some friendly advice?

Contact Us For Advice On Attic Conversions

Our clients love us, because we provide honest and straightforward information and advice, no sales pitch, no hassle! We are trusted because we aim to satisfy all of our clients as being the best loft conversion company london, not just build a job for profit. Only by being open and honest from the start, right up to the finish, can we make sure everyone is happy. We try to keep to South London, and we have carried out loft conversions from Wimbledon to Dartford.  If you want to get some information or want some advice about a loft conversion in London, just give us a call or drop a line. You can check out our loft conversion guide for more information on loft conversions.

Add Space and Value to Your Property. Discover Loft Room Solutions!


We operate across the whole of South London and can build lofts in the locations listed below.


Situated in the heart of South London, Balham boasts a lively atmosphere and an eclectic mix of Victorian and Edwardian homes. With space becoming ever more valuable, many residents are looking to loft conversions to maximise their living space, adding both value and functionality to their properties.


Nestled along the River Thames, Battersea is famed for its iconic power station and picturesque park. As the area undergoes continued rejuvenation, terraced homes often see loft conversions as a means to expand without compromising the rich heritage of the surroundings.


The suburban feel of Beckenham, renowned for its green spaces and cultural heritage, makes it a tranquil haven. Loft conversions here have seen a surge in popularity, letting residents enjoy larger homes whilst maintaining the local charm.


Offering a balance of suburban tranquillity and modern amenities, Bromley is a delightful locale. With numerous detached and semi-detached houses, homeowners frequently invest in loft conversions to enhance space and add value, tapping into the area’s growing demand.


Blending historical elements with a dynamic skyline, Croydon stands as a testament to modern evolution. Residents of older homes often view loft conversions as the perfect solution to increase their living spaces in this rapidly developing borough.


Near the renowned river crossing, Dartford provides a mix of city life and countryside charm. A rising number of homeowners are choosing loft conversions to maximise their property’s potential, catering to the needs of growing families.


The idyllic setting of Dulwich, celebrated for its village atmosphere and eminent art gallery, is a magnet for those with a keen sense of aesthetics. Loft conversions in this area are thoughtfully crafted, adding space without losing the inherent charm.


Home to the historic Epsom Downs Racecourse, this town is rich in character. Many families, keen on establishing deeper roots in the community, see loft conversions as a sustainable means to expand their homes.


Resting by the River Thames, Fulham is a blend of elegant London architecture. To maintain this beauty whilst increasing living space, loft conversions have become the go-to solution for many homeowners.


With its maritime legacy and UNESCO World Heritage status, Greenwich is truly iconic. Here, loft conversions offer residents the chance to tap into their property’s potential without altering the distinguished exterior.


Located near the illustrious Lambeth Palace, this borough exudes unique character. With growing space demands, loft conversions are becoming the choice of many homeowners, allowing them to relish the best of city life and spacious comfort.


From the historical charm of Wimbledon to the vast spaces of Mitcham, Merton offers diversity. Throughout the borough, loft conversions are gaining traction, helping residents fully utilise their properties and enjoy extra space.


Known for its vivacious markets and diverse history, Streatham is a true cultural melting pot. As space becomes a premium, loft conversions serve as a practical choice for residents to maximise their homes without compromising on local character.


Celebrated for its lush green spaces and quality of life, Sutton promises a serene suburban experience. Loft conversions here are becoming increasingly popular, offering households the opportunity to modernise and expand.


With its vibrant markets and storied past, Tooting is a reflection of London’s diverse tapestry. As the need for space grows, loft conversions are a favoured solution, providing residents with enhanced living conditions whilst maintaining the area’s distinct charm.


Lying beside the river, Wandsworth beautifully combines city life with green expanses. Here, loft conversions are par for the course, allowing homeowners to expand vertically and ensuring that homes remain harmonious with their environment.


Internationally renowned for its tennis championships, Wimbledon melds village charm with metropolitan flair. Homeowners frequently opt for loft conversions, ensuring they fully utilise their properties in this prestigious locale.



  • Framed Roofs: Preferred for cost-effective space expansion in loft conversions.
  • Pre-1960 Homes: Feature rafters for ample conversion space.
  • Reinforcement: Older homes’ rafters may need structural engineer guidance.
  • Trussed Roofs: ‘W’ shaped rafters; conversion requires ‘A’ shaped transition.
  • Stability: Steel beams between walls and ridge enhance stability.


  • Assess Suitability: Evaluate loft’s purpose suitability before conversion.
  • Structural Factors: Consider headroom, roof pitch, and obstructions.
  • Plumbing: Ensure space for plumbing; seek alternatives if limited.
  • Heating: Consider sealed systems for space constraints.
  • Hot Water: Unvented cylinders might be preferable to combi boilers.


  • Optimal Lighting: Mix natural and artificial sources for spacious feel.
  • Functional Use: Convert unused areas to bedrooms or studies.
  • Eaves Use: Create storage or reading nooks creatively.
  • Home Harmony: Integrate and optimise all available spaces.
  • Versatility: Ensure adaptability for relaxation, work, or storage.


  • Structural Soundness: Ensure conversions maintain property safety.
  • Fire Safety: Mandatory escape routes and smoke alarms are essential.
  • Energy Efficiency: Use high-quality insulation for sustainability.
  • Acoustic Comfort: Sound insulation reduces noise transfer.
  • Safe Access: Staircase designs must meet specific safety criteria.


  • Regulation: UK doesn’t specify a minimum height; comfort is key.
  • Practical Height: 2.2 metres from floor to ceiling is recommended.
  • Roof Influence: Pitch and structure affect available headroom.
  • Adjustments: Raising roof or lowering floor can increase height.
  • Feature Considerations: Account for beams or skylights in height.


  • Mandatory Approval: All UK loft conversions require it.
  • Surveyor Role: Inspections focus on regulations; completion certificates issued.
  • Thermal Efficiency: Meet U-value targets for desired standards.
  • Safety Emphasis: Ensure measures against falls and escape routes.
  • Fire/Electrical: Adhere to stringent safety standards.


  • PD Rights: Many conversions don’t need separate permissions.
  • PD Stipulations: Properties must adhere to specific volume limits.
  • Roof Limits: No alterations to existing roof height or slope.
  • Balcony Rules: Most aren’t permitted; Juliet balconies are exceptions.
  • Special Cases: Verify PD eligibility; consider a Lawful Development Certificate.


  • Dual Benefits: Gain space and boost energy efficiency.
  • Modern Insulation: Enhance thermal performance in conversions.
  • Efficient Windows: Reduce heat loss and save energy.
  • Reduced Bills: Proper insulation leads to energy savings.
  • Year-Round Comfort: Ensure insulation standards for all seasons.


  • Value Boost: Loft conversions can increase property value by up to 20%.
  • Cost Range: Depending on loft type typically upwards of £40,000 +.
  • Comprehensive Estimates: Cover design, modifications, and construction.
  • Expert Consultation: Seek guidance for detailed understanding.
  • Trusted Firms: Companies like Clapham Construction offer insights.


  • Ceiling Joists: Ensure joists bear added load; consult a structural engineer.
  • Staircase: Plan for regulation adherence and space efficiency.
  • Heating: Achieve warmth through radiators and insulation.
  • Ventilation: Maintain optimal air quality with windows or vents.
  • Design Cohesion: Ensure the conversion complements the existing home aesthetics.


  • Regular Checks: Consistent maintenance ensures longevity.
  • Inspections: Identify wear; professional checks every two years.
  • Material Care: Address specific requirements, e.g., wooden beams.
  • Ventilation: Check systems to avoid dampness and mould.
  • Warranty: Be aware of warranties for workmanship or materials.


  • Structural Integrity: Consult a structural engineer for weight guidance.
  • Fire Safety: Adhere to regulations for escape routes and alarms.
  • Ventilation: Combat dampness and ensure warmth.
  • Electrical Norms: Adhere to safety standards for installations.
  • Safe Access: Ensure staircase width and headroom.

Interested in an Attic Conversion? Contact Us Today


New build houses, detached houses, semi-detached houses, and terraced houses are all eligible for a loft conversion, as long as they have a pitched roof with enough headroom and space for a staircase.

  • New build houses are often designed with the potential for a loft conversion in mind, and may already have the necessary structural support in place.
  • Detached houses, semi-detached houses, and terraced houses are also commonly converted, as they often have a pitched roof and enough space for a staircase.

However, the suitability of these houses for a loft conversion will depend on the specific design of the house and the amount of headroom and space available in the attic. A professional assessment by Clapham Construction may be needed to determine the suitability of these types of houses for a loft conversion.


New Build Houses

Read on to find out more about how new build houses can benefit from a professionally designed and executed loft conversion, adding valuable space and increasing the overall value of the property.

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Detached Houses

Find out more about the potential of detached houses and how a well-planned and executed loft conversion can transform them into spacious and functional living spaces.

Read More

Semi-Detached Houses

Semi-detached houses offer great potential for a well-designed loft conversion, Read our guide on semi-detached loft conversions here.

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Terraced Houses

A terraced house loft conversion can provide many benefits beyond just added space and increased value. It can also improve the overall functionality and layout of the house.

Read More

Find Our More About Loft Conversions Today!

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