Loft Extensions London



Completed loft conversion with kid theme interior

Loft Extension Specialists

Welcome to Clapham Construction Service, a construction company serving the London area. Here at Clapham Construction, we provide our clients with a first-class service thanks to our 20 years of experience within the construction and home renovation industry. 

From our specialist loft conversions to our stunning home extensions, we go above and beyond to create that much needed extra space in your home where you need it most. 

Whether you’re looking to increase your property’s value or simply make it more liveable for your growing family, we can help make your home extension dreams a reality.

What’s included in a Free Loft Extension Consultation?

Clapham Home Renovation Case Studies:

The Almeric Road Loft Conversion

Clapham Construction Service was appointed to undertake this complete home renovation project by our clients. The works involved converting a single 3 storey home in Clapham into 3 separate self-contained apartments.

The project involved adding a basement to the ground floor, which also benefited from a rear wrap around extension to increase both the living space as well as the number of bedrooms this property was able to house. We also added a Mansard loft conversion at the top of the property to create the 5th and final floor of the building.

A rewarding project converting an old run-down property to into three separate dwellings to provide new living spaces in a beautiful area. Breathing new leases of life into these projects are what we absolutely love to do, whether this be for a young family, working professionals or group of friends, we are positive the new owners will enjoy this space for years to come.

completed home renovation

Looking For Loft Extension Services in London? Contact Us

Here are our

Loft Extension Services London

Home renovation


Loft conversions are without a doubt our speciality. From creating a small loft conversion in the space you have available to creating entirely new floors, here at Clapham Construction Service, we can make your loft conversion work for you. 

We have experience working on a range of loft extensions throughout London, from dormer loft conversions to mansard and Velux loft conversions. We’ve even worked on hip-to-gable as well as L-shaped hip-to-gable loft conversions, so you could say our experience is vast.

We’ve been there, done it and got the t-shirt on more than one occasion. Not only do we know the best ways to approach any loft conversion project but we’re able to give you the best possible advice and guidance at every stage too.

Home renovation with home extension


Loft conversions aren’t the only area in which we shine. We also take on home extensions throughout the capital, from small additions to much larger scale designs.

With our experience, knowledge and network of contacts that we’ve built up over the years, we can ensure your home extension is completed using the best materials at some of the most competitive prices out there.

Our knowledge of home extensions allows us the freedom to work on any home extension project, regardless of the shape and size. We’ve even worked on totally bespoke designs, creating some truly amazing results.

Home renovation consultation

Free Consultations

Here at Clapham Construction Service, you can trust in us to provide you with the best service possible. Whether you’re looking for a loft conversion in London or a 100% bespoke home extension on the outskirts, it all begins with our free consultations in which you’ll receive honest feedback and advice about the project you have in mind. 

We have a lot to look at

Stunning Looks & Functionality

Full Accountability

We own our business, we sell you our service and
then we manage your project for you directly on site.

10 Year Protection

All our projects come with a 10 year protection warranty.
Our warranty cover is one of our key elements

Unbeatable Prices

Our prices, like us, are straight forward and laid out right at the
beginning and  do not change unless you want it to, prices
are fixed, guaranteed!

100% Customer Focus

Just ask our clients, they will not only tell you, but show you what
we do and what sets us apart in the market.

Detailed Specification

We offer full specifications so you know exactly what
you’re getting. No surprises.

View Warranty and Insurance

What our clients have said


Clapham Construction Service completed our loft conversion. We are extremely pleased with the results. The work is of extremely high standards. It was important to us to have people we can trust. We are so happy – Thank you Dangis and Alfred.

Frank Waithright

Clapham Construction Service built our loft in Dulwich. I found them very professional right from the consultation to completion. The project management team were very informative, and the build quality is exceptional. I had a couple of delays regarding the snagging stage at the end, but they informed in advance and works were finished well. I own a mechanic franchise and wish I had these guys working for me.

James De Ville

Both I and my wife would like to extend our sinceres thanks to you for everything you did for us in ensuring a success completion of our loft conversion. We are very pleased and happy with the ends result. It meets and exceeds our expectations. We wish to you great favour and fortune in the future.

Liu Jianguo

We are very pleased in dealing with Clapham Construction Service
to build loft conversion. Clapham Construction Service has nothing but constant good service; follow up 8 weeks on site and fixed price for loft conversion. I cannot express how grateful and appreciative my wife and I are for the fantastic new room in loft. Thank you once again.

Emma G

Quill Lane

Rear Dormer Conversion
incorporating the retained
chimney into the design.

Hillbrook Road

Rear Dormer conversion
with Juliet Balcony.

Courcy Road

Loft Conversion with
exposed brickwork

Completed Home Renovations

See what we can do and get some ideas!


Whats included in a Free Consultation?

Our free consultations can usually last from 20 minutes to one hour depending on whether you just want a fixed price quote, or you would like some advice on your options and knowledge on what’s involved in undertaking a Loft or Extension project.

We will also provide you will a written fixed price quotation
following the meeting and some key materials on the things
we have discussed for reference.

Here’s what we are able to cover in our consultations:

  • Review the suitability of your property for the proposed project
  • Conduct some prior planning research to review your options
  • Discuss specification and options available for the works
  • Discuss things to budget for… beyond our works to complete
    the build
  • Provide you an introduction to:
  • The Design Process
  • The Build Schedule and Timing
  • Building Regulations
  • Partywall Matters
  • Provide you with a No Obligation
  • Fixed Price quotation
Google Rating
Based on 56 reviews