If you’re looking to add value as well as extra space to your home, then a rear extension may be the project for you.

If you are carrying out your work under Permitted Development, you will be expected to build in the same material as the existing dwelling. This must be done carefully, perhaps requiring you to source reclaimed materials to get a good match, or tint the bricks for a seamless look.

Alternatively, you could design an addition in a contrasting style. This makes a statement and can be easier to achieve success with than trying to match old and new.

Here, we take a look at some of the finest examples of rear extensions in recent times.

1. A Striking Clad Extension

A grey rendered blockwork ground floor extension supports the timber frame bedroom ‘box’ above

This grey rendered blockwork ground floor extension supports a timber frame bedroom ‘box’ above.

  • Build cost: £175,000
  • Location: Hampshire

2. A Sensitive Extension

A contemporary-style extension clad in western red cedar contrasts with the original Grade II-listed cottage

A contemporary-style addition clad in western red cedar contrasts with this original Grade II-listed cottage.

  • Build cost: £175,000
  • Location: Hampshire

Do I Need Planning Permission for a Rear Extension?

If your home is not in a conservation area or restricted by Listed Building consent, you may find your rear extension falls under Permitted Development.

This means that you can extend up to 8m from the original rear wall of your property on a detached home, or up to 6m on a semi detached or terraced home. In either case, your extension must not be higher than 4m. There are further restrictions if your project is to sit within 2m of a boundary (in this case the eaves must not be higher than 3m).

These measurements apply to single-storey extensions only, but some two-storey additions are allowed too.

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3. An Extended and Renovated Cottage

A new glazed extension to a traditional whitehouse croft, provides a kitchen and utility space filled with natural light

A new glazed space to a traditional whitehouse croft, provides a kitchen and utility room filled with natural light.

  • Build cost: undisclosed
  • Location: Isle of Skye

4. A Modernist Addition

A cantilevered timber-clad roof appears to float on clerestory windows set above a white rendered wall on one side, and sliding doors on the other

A cantilevered timber-clad roof appears to float on clerestory windows set above a white rendered wall on one side, and sliding doors on the other.

  • Build cost: undisclosed
  • Location: Denbighshire

5. A Listed Stone Cottage Extension

The sympathetic oak frame extension, with reclaimed triple Roman clay tile roof, offers a family sunroom

The sympathetic oak frame addition, with reclaimed triple Roman clay tile roof, offers a family sunroom.

  • Build cost: undisclosed
  • Location: Bath

6. An Extended Farmhouse

Two extensions, clad in timber and Cor-ten steel, are linked to the old farm building with a glazed corridor

Two new structures, clad in timber and Cor-ten steel, are linked to this old farm building with a glazed corridor.

  • Build cost: £355,800
  • Location: Inverness-shire

7. An Extended 1950s Home

A large rear extension incorporates a spacious kitchen-diner and separate open-plan living room, which open on to a patio

This large rear addition incorporates a spacious kitchen diner and separate open plan living room, which open on to a patio.

  • Build cost: undisclosed
  • Location: Cardiff

8. A Glazed Kitchen Addition

single-storey kitchen extension

This single-storey kitchen extension opens onto the garden with powder-coated bifold doors from Origin.

  • Build cost: £120,000
  • Location: West Midlands

9. A Zinc-Clad Rear Extension

Zinc-clad single storey extension

This rear single-storey addition to a London flat in a conservation area has been clad in a pre-coloured dark zinc.

  • Build cost: £240,000
  • Location: North-west London

10. A Frameless Glass Extension

A frameless galss extension on a Victorian house

Using contemporary frameless glass, a new bright open plan kitchen/dining/living space has created, which opens on to the rear garden without impacting on the traditional brick shell of the building.

  • Build cost: £400,000
  • Location: Hampshire

11. A Dramatic Remodel

A remodelled 1930s bungalow

This 1930s dormer bungalow has been transformed into a stunning chalet-style home thanks to a series of rear and side additions.

  • Build cost: £150,000
  • Location: Worcestershire

12. A 1950s Home Extended

This rear extension has been clad in white render to contrast against the 1950s brick building

This 1950s home has been opened up thanks to a rear extension which houses a new kitchen diner that connects with the garden through bifold doors. The addition has been clad in white render to contrast against the existing brick building.

  • Build cost: £95,000
  • Location: Bedfordshire

13. A Budget Addition

Thanks to a new kitchen extension, this formerly cramped 1930s semi-detached home now offers the family with much-needed additional space

Thanks to a new kitchen extension, this formerly cramped 1930s semi-detached home now offers the family with much-needed additional space. The crisp white render and modern glazed openings create a clear distinction between old and new.

  • Build cost: £40,000
  • Location: Nottingham

14. A Cantilevered Wing

As part of the conversion of the stone barn on site, a dramatic cantilevered bedroom wing extension has also been added to create the space the homeowners need

As part of the conversion of the stone barn on site, a dramatic cantilevered timber-clad bedroom wing extension has also been added to create the space the homeowners need and create a clear separation between living and sleeping quarters.

  • Build cost: £350,000
  • Location: Northern Ireland

15. An Extended Barn Conversion

Built of and clad in CLT (cross-laminated timber) with frameless glazed openings, this lateral extension spans the rear of the site, consequently reorientating the outlook of the existing Grade II-listed barn, to make the most of the garden views

Built of and clad in CLT (cross-laminated timber) with frameless glazed openings, this lateral extension spans the rear of the site, consequently reorientating the outlook of the existing Grade II-listed barn, to make the most of the garden views.

  • Build cost: £250,000
  • Location: Hampshire

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