Wraparound extensions

The biggest, brightest ground floor your house can have.

Wraparound (L-shaped) extensions combine a side and rear extension to create one generous open-plan kitchen, dining and living space.

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Open-plan interior — Hemel Hempstead

What it is

Side and rear, combined.

Best for

Terraces and semis with both a side passage and a rear garden
Families wanting one large open-plan room
Houses where a rear extension alone would feel narrow

A wraparound extension wraps around the back corner of the house — filling the side return or side passage and extending across the rear. The result is usually a single large room with space for kitchen, dining and living zones, and glazing on two sides.

Planning

Almost always needs planning permission.

Because a wraparound combines a side and rear element, it usually falls outside permitted development and needs a full planning application. It will also typically involve party wall notices on both the side boundary and the rear.

Summary for England, for guidance only — see the Planning Portal or our permitted development guide. We confirm the route for your house before design starts.

Design considerations

Designing a wraparound well.

Big spans

Removing a rear corner needs careful steelwork — our engineers design it to keep the space clear of posts.

Light to the middle

Roof lights over the old side return stop the centre of the house going dark.

Planning strategy

Height and depth are tuned to what the council will approve.

Drainage

Side passages often carry drains that need diverting.

Real project

Built by AMH in Hemel Hempstead.

Read the case study

Before: an overgrown sloping rear garden with sleeper steps and a shed — Rear garden — terrace, retaining walls & steps

After: a porcelain terrace, rendered retaining walls and steps up to a level lawn — Rear garden — terrace, retaining walls & steps

Before: a brick semi with a small canopy porch and an overgrown front garden — Front — porch extension, walls & garden

After: a new brick front extension, gravel garden and new steps — Front — porch extension, walls & garden

FAQs

Questions we're often asked

Is a wraparound extension worth it?

It creates the largest ground-floor room of any extension type and often transforms how a family uses the house. We'll compare it honestly against a simpler rear extension at the site visit.

How long does a wraparound take?

Typically 16–20 weeks on site, after design and planning.

Will we need party wall agreements?

Very likely — often with neighbours on the side and rear. We serve notices early so they don't delay the start.

Start your project

Planning an extension?

A free, no-obligation site visit — an honest view on feasibility, budget and timing before anything is drawn.

Arrange a site visit 07347 160630 amhbuild@hotmail.com