Contemporary open plan Kitchen design and build by Proficiency
| 4.8 42+ Reviews
Considerate Construction Scheme
Basement
Specialists

Building Company in London

For over a decade, Proficiency, a building company in London, has led all aspects of high-end construction. Whether you're looking to expand or refine your home with a loft conversion, new build rear or side extension, basement conversion, or a top-to-bottom refurbishment, our ethos is high quality first craftsmanship for the very best in residential design and build in London.

Build With Us
narrow rear home navy blue extension

Every day, we aim to be London's premier construction company, delivering nothing less than our absolute best.

Leaders in Design & Build

Heritage
Expertise

Specialists in heritage property and Georgian-style townhouses, preserving original character while integrating modern living.

Listed
Building Specialists

We expertly manage Listed Buildings, navigating permissions and regulations to ensure compliant, high-quality renovations.

Town House
Planning

Local London expertise ensures smooth planning approval for Town House projects, reducing delays and uncertainty.

Residential Refurbishment specialist

As a main contractor and principal contractor in North West London, Proficiency delivers luxury renovations and residential refurbishment projects with precision, care and strong technical oversight, supported by a dedicated architect service for cohesive project delivery. From basement construction and vertical extensions to heritage roof upgrades, we work on ambitious homes in areas such as Maida Vale and Earls Court, combining structural expertise with refined finishes such as skylights, steel frames, exposed timber, bespoke fireplaces and marble tiles.

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Building Services

extension
House Extension Spacious Living Upgrades Extend Home
New builds
New Builds Build Your Custom Dream Homes Build Process
renovation
Renovation Upgrade your home Our Process
basement
Basements Convert your basement Our Process
loft
Loft Conversions Stylish Space Solutions Create Space
design
Design and Build End-to-end solutions Our Process

Featured in KBB Magazine

Industry recognition for exceptional design and craftsmanship

KBB Magazine

UK's Leading Kitchen & Bathroom Publication

One of our London kitchen extension was highlighted on the front cover of KBB Magazine, reflecting our dedication to innovative design and outstanding craftsmanship.

Build On Our Proven Success
KBB Magazine featuring Proficiency kitchen extension on Front Cover

LATEST PROJECTS

kitchen extension with skylight built by a building company Proficiency
Hillfield Road, London Wrap Around Extension View Project
Open plan living room with Kitchen
Wesbere Road, West Hampstead Kitchen Renovation See the Project
kitchen
Cambridge Road, London Extension & Loft Conversion View Project
Modern house renovation
Conewood Street, Highbury Side Extension View Project

A Complete Design & Build Service

We manage every stage of your project in-house, from initial design concepts and planning guidance through to construction and final finishes. With a single, dedicated team overseeing the entire process, you benefit from clear communication, better coordination and a more efficient build, ensuring your home is delivered to the highest standards without unnecessary delays or complications.

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Why Our Building Company

When it comes to the quality and care that we put into every project, we think of ourselves as one of the leading building companies in London. This means that, as the right builder, we have the team, the interior design expertise and the commitment to a high quality that sets us apart.

  • 14+ years of experience: Proficiency has been building, renovating, designing and refining homes across London, with projects in the south and beyond, since 2011.
  • Fully Insured: Fully insured with Public and Employers Liability, Professional Indemnity, Contractors All Risk and high-risk basement works.
  • Luxury Results: Everything we do is finished to the highest standards so you can get the luxury home of your dreams.
  • FMB Accredited: Proud members of the Federation of Master Builders, independently verifying our craftsmanship, reliability, and professional standards.

TESTIMONIALS