House Extensions in London – Designed, Built, Delivered

At Simply Construction Group, we are one of London’s most trusted home extension builders, offering bespoke house extensions designed to transform your living space and enhance the way you live. Whether you’re looking to create an open-plan kitchen and dining area, a light-filled family room or a dedicated home office, we offer a fully project-managed design and build service from start to finish.

As part of the Simply Construction Group, we combine years of experience, architectural expertise and customer-first values to deliver beautifully finished house extensions across London.

A Complete Design & Build Package for Your Home Extension

We specialise in single storey, rear, side return and wraparound house extensions, and manage every stage of your build with precision – from initial drawings and planning permission, to structural calculations, groundworks and the full construction process.

If you already have an architect or design team in place, we’re also happy to work collaboratively to bring your vision to life. Our goal is to make the house extension process as smooth and stress-free as possible, whether you’re starting from scratch or joining us mid-project.

Why Choose Simply Construction for Your London House Extension?

• Full Design and Build Service – including architectural design, planning support and build
• Experienced Home Extension Builders – delivering high-quality craftsmanship across London
• 10-Year Structural Guarantee – for your peace of mind
• Dedicated Project & Site Managers – ensuring progress, safety and quality at every stage
• Flexible Approach – we work with you or your existing team

With thousands of completed home extensions across London and a long list of happy clients, Simply Construction has earned a reputation for delivering beautiful, functional spaces with outstanding customer service.

Expert Home Extension Builders Covering All London Boroughs

All construction work is carried out by our network of trusted, vetted contractors – ensuring your house extension is delivered on time, on budget and to the highest standard. Every contractor operates under strict agreements with Simply Construction, allowing us to maintain control and consistency throughout your build.

From concept to completion, we’re here to help you reimagine your home – whether that means adding extra space for a growing family or increasing the value of your property with a high-specification extension.

Get in Touch

If you’re planning a house extension in London, call us today on 0800 917 7571 or complete our online enquiry form to arrange your free, no-obligation site survey. One of our experienced advisors will be in touch to discuss your project and explain the next steps.