house extension builders

Local Clapham Builders

If you are after the best builders in Clapham, you need a building company with a reputation for transforming living spaces and homes. Proficiency isn't just about building extensions. We create spaces in which you and your family thrive. This is achieved by listening to you and building around your ideas, visions, and design inspiration.

High end extension builders
extend your home

End-to-end building company

We value just how important exceptional customer service is, from the very first design briefing until the moment the final finishing touch is completed.

Proficiency is a design and build company that specialises in converting lofts, renovating, and extending properties, we have a team of Clapham builders that can take care of the whole project from the planning, and the design all the way to the completion. Maybe your kitchen needs updating or you are planning an extension, all these and other projects and assignments can surely be handled by our team of professionals.

We are versatile, we flex and fit to meet your needs – a testament to which is the fact that we offer two packages: a comprehensive service from design to build, and a build-only service, where our builders in Clapham work hand in hand with the other professionals you’ve commissioned.


Design and Build Service

At Proficiency, the qualifications and expertise of our team are the foundation of our success when it comes to transforming living spaces in Clapham. Our dedicated professionals have an average of, over 15 years of experience in the building and construction industry bringing a wealth of knowledge and skill to every project. Our architects, builders and project managers hold certifications from organizations such as the Chartered Institute of Building and the Royal Institute of British Architects. This high level of expertise ensures that we handle every aspect of your project from design to execution with utmost professionalism and precision. Our team possesses skills ranging from architectural design, to advanced construction techniques allowing us to cater to a wide range of client needs and preferences. At Proficiency we don't simply construct buildings; we create living spaces tailored specifically for you.



open plan kitchen extension
The Avenue, Queen's Park

Rear and side extension
View Project

navy blue kitchen
Islington, Canonbury

Rear Extension
View Project

Cambridge Road, Twickenham

Extension & Loft Conversion
View Project

Hillfield Road, West Hampstead

Wrap Around Extension
View Project

Shall we get to work?

When you choose builder in Clapham SW4 areas, make sure you choose a team who cares about your project. Proficiency have an excellent portfolio of homes improved beyond measure around Clapham Junction, with exceedingly happy clients. Let’s talk about your project.

Building a room

Contact Us


This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.