Building the most exquisite house extensions in London requires two fundamental: a client with a dream and the right team of architects, builders, and interior designers to make that dream a marble-edged, fabric-matched, open-plan, high-tech, bi-fold lit reality. Proficiency Design and Build has just such a team, so what are your property extension dreams?
Don’t let your home restrict your life. Extend your home to suit your lifestyle.
Don’t move out, move outwards. If you have outgrown your home, a tailored building solution is a great way to transform your space, no matter where you stay in London.
From Central London to South East London, our expert workmanship makes it easier than ever to create that stylish kitchen extension, fully equipped home gym, or single-storey extension you've always wanted.
Combine this with a complete house refurbishment of your existing home, and you'll have a completely transformed living space without the hassle of moving.
Our expert team conducts a thorough on-site inspection of your property to fully understand your house extension ideas. We assess structural feasibility, explore design possibilities, and identify potential challenges early on to ensure seamless project delivery.
Our experienced team handles all aspects of the planning permission process, should you need it. While some extensions, like single-storey and loft conversions, don't require permission, we'll assist with your planning application through the local planning authority, should it be required.
As part of our collaborative approach, homeowners are assigned a dedicated project manager as their point of contact throughout the building process. Our team provides regular updates and tailored advice and guidance, ensuring your house extension in London is built with your lifestyle in mind.
With over 14 years of experience, our London extension company is adept at handling the most complex party wall agreements. Our professional team will guide you through the process, prepare the relevant paperwork, and work with neighbouring properties without delay.
Whether building works are done in North or South West London, we adhere to strict building regulations that ensure the highest quality. Upon completion, we will provide you with all the necessary documents from the local authority's building control office for your peace of mind.
Proficiency refurbished this exquisite home, redesigning the kitchen, living areas, staircase, bathroom, and bedrooms. The design process used light neutral tones for additional space and brightness, while structural work added moulded cornice and herringbone flooring for timeless elegance. Extension plans and architectural design created extra living space with style and practicality.
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Transform your ground-floor living space with a beautifully designed rear house extension. This extension type is ideal for creating larger living spaces, blending seamlessly with your existing home.
Whether you envision a contemporary kitchen with luxury finishes or a versatile family room flooded with natural light, our single-storey extensions offer valuable square meterage to enhance your lifestyle and evolving needs.
Double your London property's potential with a double-storey extension.
Our expert workmanship and award-winning designs ensure both levels of your house extension project are seamlessly integrated. From fabulous master bedrooms and en-suites to additional rooms for your growing family, Proficiency's double storey house extensions exceed expectations.
As the name suggests, a wrap-around extension combines the benefits of rear and side designs to create an L-shaped extension for extra space. This impressive layout boasts open-plan living spaces that transform how you use your home, upping the flow and functionality of the house.
Make use of overlooked spaces with a side return extension. This clever solution is particularly common if you have a terraced house, offering a practical way to increase square meterage without sacrificing the garden.
Maximise the unused space between your rear rooms and boundary; perfect for extending a dining room or lounge, or building a new kitchen or conservation area.
Some extension builders just build, but at Proficiency, we use over a decade of experience in London's property market, planning authorities and innovative building techniques to guide you through the entire project.
No home renovation or extension job is too big for our team. From grand new build construction projects to new room additions, our building work is always of the highest standard.
We partner with you from initial concept to final completion, no matter if your property is in the North West London or South London. We're committed to providing transparent communication, unmatched quality, and start-to-end expertise.
In 2025, the typical price range for a house extension in London falls between £65,000 and £100,000. Many London residents opt for double-storey extensions as they provide additional living space.
What you can be assured of is our client first philosophy regarding your budget. From material selection to on-time project delivery, we focus on exceptional attention to detail with our personalised project plans.
Trusted by London homeowners for over a decade, Proficiency is the high-end construction company you can count on. Every time.
Ready to start your new house extension in London? Get in touch with Proficiency Design & Build for a free consultation today.
As one of London's leading luxury house extension specialists, we provide personalised solutions to bring your dream home goals to life.
Our dedicated team of architects, interior designers, builders, and structural engineers are ready to take your home from ordinary to extraordinary. Contact us now.
