REAR EXTENSIONS, SIDE RETURNS & SINGLE STOREY BUILDS

More space without compromising how your home works

A good extension should feel like it has always been part of the house. We build rear extensions, side returns and single storey extensions across South London, focusing on structure, light, and a finish that blends in properly. You get clear costs, realistic timelines, and a hands-on team from start to finish.

House extension builders in South London

Extensions that improve how the whole house works

We look at the layout as well as the extra square metres. That means thinking about flow, kitchen positioning, natural light, storage, and how the new space connects to the rest of the house.

Whether you have drawings already or you are still working things out, we can help you understand what is practical, what will affect cost, and how to avoid common issues on site.

Enquire now

What you get with a Building Plus

Clear communication, tidy work, and an extension that feels like part of the original house. We focus on the details that matter: structure, levels, junctions, and the finish.

Better space

Layout-led building that improves flow, not just floor area.

Build quality

Solid structure, good levels, and clean detailing throughout.

Looks right

We take care with brickwork, rooflines and finishes so it blends in properly.

Managed build

Clear plan, realistic timelines and issues dealt with properly as they come up.

Make an enquiry

Frequently asked questions

How long does a typical extension take?

Timelines vary by size and complexity. Once we have the scope and access details, we will give you a realistic programme and keep you updated as the job progresses.

Can I live in the house during the build?

In most cases, yes. We plan the work to reduce disruption, keep the site tidy, and keep the house usable wherever possible.

How do you handle changes during the project?

Any changes are discussed first, priced clearly, and agreed before we proceed. That way there are no surprises later.

Do you use subcontractors?

We stay hands-on and keep a consistent main team on the job. If a specialist trade is needed, we will tell you upfront and manage it properly.

Do you help with planning permission and building control?

Yes. We regularly work alongside architects and building control. If planning approval is needed, we can help you understand what is required and how it affects the build.

How do you keep the site safe and tidy?

We keep the site organised, protect existing areas, and tidy up daily. It makes the build safer and helps reduce disruption while you are living in the house.

Will I have one main point of contact?

Yes. You deal directly with the people running the job, so communication stays clear and decisions are dealt with quickly.

Are you fully insured?

Yes. We carry full public liability and employer’s liability insurance, so your home and everyone on site is properly covered.

WORKING ACROSS LONDON & SURROUNDING AREAS

House extensions in South London

REAR EXTENSIONS, SIDE RETURNS & SINGLE STOREY BUILDS

More space without compromising how your home works

HOW WE WORK

Clear plan, tidy site, proper oversight

Extensions that improve how the whole house works

What you get with a Building Plus

Better space

Build quality

Looks right

Managed build

Frequently asked questions

Start your project with us

About Building Plus

Services

Site links

Contacts