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Wraparound house extension

Updated: Nov 17, 2023

Everything you need to know about wraparound house extensions in London and the United Kingdom, including types of wraparound extensions, what are the planning rules, costs associated when building a wraparound house extension and questions to bare in mind before starting your project.


Wraparound house extensions are an excellent way to fully maximise the ground floor space available in your home, taking full advantage of both the side and rear space adjacent to the property. There are many possible layouts avaible to suit your needs with a wraparound house extension which typically wraps around the ground floor in an L-shape. Here is everything you need to know about wraparound house extensions in London and the United Kingdom, including what are the planning rules, costs associated when building a wraparound house extension and questions to bare in mind before starting your project.


Learn more about side return house extensions https://www.lcclconstruction.co.uk/post/side-return-house-extension


Wraparound house extension in London
Wraparound house extension in London

What is a wraparound extension?


Wraparound house extension combines both side return and rear extension to create an L-shaped space. If you are looking to utilise the kitchen or dining/living areas, create an additional utility room, ground floor shower room and maybe a boot room then this is the best way forward.


Wraparound extensions add an amazing amount of space too, anything from 15m2 to 60m2. they are ideal for ground floor flats, houses that have an outrigger, semi detached houses that have unused space to the side or even an existing garage at the side of the house. In some circumstances terraced properties can benefit from a wraparound extension too for example an end of terraced property.


Wraparound extensions are very popular with homeowners looking to increase the footprint of their homes and even to transform the existing layout so that it is more complimentary to modern family life, allowing for the addition of a large kitchen and more open plan family space. These extensions are transformative on suitable properties due to the size they offer and the flexibility of the layout maximising wasted areas which will be utilised to create a generous ground floor space.



Wraparound home extension
Wraparound house extension

What are the advantages of a wraparound of house extension:



Whether your aim is to increase the kitchen size, add living space, a utility room or create a ground floor bedroom to meet the needs of your family the advantages of a wraparound extension are numerous:

  • Utilise otherwise wasted space such as a side ally or garage.

  • Improved saturation of natural light in the downstairs areas through addition of skylights/lanterns

  • Create space for a large open plan kitchen diner and casual living space where everyone can spend time together

  • A generously sized utility room can be added to free up space in the kitchen and reduce noise from washing machines/dryers

  • Add a boot room to reduce dirt and clutter cominh into the house

  • Create much needed extra storage space

  • A private courtyard can be created at the side

  • Extra 16m2 to 60m2 of additional space

  • Potential for additional space to be added to the first floor too in some circumstances

  • If the garden space is small this is a good solution

  • Extra guest bedroom and bathroom can be added for visiting relatives


Wraparound rear house extension plans by Lccl Construction
Wraparound rear house extension plans by Lccl Construction

Will I need planning permission for my wraparound home extension?


A wraparound rear house extension will most likely require full planning permission. At LCCL Construction we can help you with the full design and build of your wraparound extension in one convenient package. Our architect will visit your property and produce existing vs proposed drawings so that we can submit a planning application to your local planning authority. We will also take care of structural drawings, Party Wall Agreements and of course complete the build stages of your extension project. If you are planning on building to the side only and to the rear only without the L connection then this may not require planning permission it could fall under your homeowner permitted development rights.


For all extensions:


  • Only half the area of land around the "original house"* can be covered by extensions or other buildings.

  • Extensions cannot be higher than the highest part of the existing roof; or higher at the eaves than the existing eaves.

  • Where the extension comes within two metres of the boundary* the height at the eaves cannot exceed three metres.

  • Extension cannot be built forward of the ‘principal elevation’ or, where it fronts a highway, the ‘side elevation’.

  • The work cannot include:

  • verandas, balconies or raised platforms.

  • a microwave antenna (e.g. TV aerial or satellite dish).

  • a chimney, flue or soil and vent pipe.

  • any alteration to the roof of the existing house.

  • On Article 2(3) designated land* the work cannot include cladding of the exterior.

  • The materials used in any exterior work must be of a similar appearance to those on the exterior of the existing house.


For single storey extensions:


  • Single-storey rear extensions cannot extend beyond the rear wall of the original house* by more than four metres if a detached house; or more than three metres for any other house.

  • Where not on Article 2(3) designated land* or a Site of Special Scientific Interest; and subject to ‘prior approval’, the limit for single-storey rear extensions is increased to eight metres if a detached house; or six metres for any other house.

  • This requires that the relevant Local Planning Authority is informed of the proposed work via a prior approval application.

  • Single-storey rear extensions cannot exceed four metres in height.


For Extensions more then one storey:


  • Extensions of more than one storey must not extend beyond the rear wall of the original house* by more than three metres or be within seven metres of any boundary* opposite the rear wall of the house.

  • Roof pitch must match existing house as far as practicable (note that this also applies to any upper storey built on an existing extension).

  • Any upper-floor window located in a ‘side elevation’ must be obscure-glazed; and non-opening (unless the openable part is more than 1.7 metres above the floor).

  • All side extensions of more than one storey will require householder planning permission.

  • On Article 2(3) designated land* all rear extensions of more than one storey will require householder planning permission.

For side extensions

Where it would extend beyond the ‘side elevation’ of the original house*, the extension:

  • Cannot exceed four metres in height.

  • Can only be a single storey.

  • Can only be up-to half the width of the original house*.

On Article 2(3) designated land* all side extensions will require householder planning permission.



At LCCL Construction we are committed to simplifying the process of designing and building your kitchen extension, house extension or loft conversion, we understand the rules for side return, rear extension and wraparound extensions both single storey or two storey wraparound home extensions. We can help you and guide you with our design and build services.


Cross section and elevations of wraparound home extension
Cross section and elevations of wraparound home extension

What are the types and costs of a wraparound house extension?



Small wraparound house extension
Small wraparound house extension

Design and Build Flat Roof Small Wrap a Round Extension.


Estimated cost: from - £57,700.00

Optional Extras:


  • 1 x Skylights or Lantern on flat roof

  • Bi-fold doors

  • Kitchen

  • Floor finishing

  • Patio at rear of the property

  • Downstairs Bathroom





 Pitched small wraparound house extension
Pitched small wraparound house extension

Design and Build Pitched Hip Roof Small Wrap a Round Extension.


Estimated cost: from - £58,000.00

Optional Extras:


  • 2 x Velux Windows

  • Bi-fold doors

  • Kitchen

  • Floor finishing

  • Patio at rear of the property

  • Downstairs Bathroom





Mid wraparound house extension
Mid wraparound house extension

Design and Build Single storey Flat Roof Large Wrap Around Extension.


Estimated cost: from - £70,000.00

Optional Extras:

  • 2 x Skylights or Lantern on flat roof

  • Bi-fold doors

  • Kitchen

  • Floor finishing

  • Patio at rear of the property

  • Downstairs Bathroom




Is my house suitable for a wraparound extension?

The wraparound extension can be created on terraced houses, end of terraced houses, semi detached houses or detached houses including Period style properties, Edwardian, Victorian or modern homes that have space to the side of the ground floor outrigger/kitchen or even to infil alongside an existing rear extension that is not full width.


What kind of layout can I expect internally?

Internally the wraparaound house extension can have a large kitchen with a kitchen island, underfloor heating, upgraded electrical and plumbing solutions. Typically homeowners are trying to achieve a spacious open plan layout to the rear of the wraparound house extension with additional rooms to the side of the extension, such as utility room and downstairs bathroom or bootroom. Clever design will improve levels of natural light with velux skylights, or on a flat roof lanterns or flat skylights. Bifold, Crittal or sliding doors add more light and create a view of the garden with increased glazing to the rear of the extension. As well as the large open plan kitchen living area other popular additions to a wraparound extension include the installation of an understairs wc and construction of a utility room or utility cupboard to house all the laundry equipment out of the way.


What type of roof can I have on my wraparound house extension?

Features of a wraparound house extension with a pitched roof - the pitched roof would be covered in roof tiles such as clay, concrete or slate tiles, velux lights can be installed to the pitched roof, at the rear of the wall there can be various types of glazing but the most common are bi-fold doors, sliding doors, crittall or french doors. The finish of the exterior walls comes in render, brick finish or cladding such as zinc clad. In addition a new patio can be added towards the rear of the property to create an outdoor seating and dining area outside the new extension.


Wraparound house extension with flat roof - the roof is all on one level with only a very slight pitch to prevent water pooling. There are many options for flat roof coverings such as mineral felt, GRP, torch on felt, EPDM, fibreglass or GRP to name a few. In terms of glazing features include options similar to above except the flat roof would have flat roof skylight or lantern added instead of velux windows.


How much value will a wraparound extension add to my home?

A wraparound extension brings many benefits to the house and naturally homeowners are keen to find out if the work completed adds value to the property. According to The Times Money Mentor (source https://www.thetimes.co.uk/money-mentor/article/best-ways-add-value-home/) building a side or rear extension can add around 15%, with an additional bathroom adding around an additional 3% to the value of the existing house. It is also widely thought that having a large open plan kitchen makes a property more easily saleable.

What is the cost of the wraparound or side return home extension?


You can use our "instant quote calculator" and find out the cost in seconds! for both design and build, architecture services or just construction services depend what stage you are in and what you have so far completed.


We have experience of over 15 years in design and construction of the wraparound or side return home extension both single storey or two storey, in the London and Hertfordshire area and have worked out a unique calculation formula to help you find out to what will your wraparound or side return home extension could cost in seconds.


Wraparound two storey and single storey by Lccl Construction
Wraparound two storey and single storey by Lccl Construction

What is the cost of a loft conversion and house extension?

You can use our "instant quote calculator" and find out the cost in seconds! for both design and build, architecture services or just construction services depend what stage you are in and what you have so far completed.


We have experience of over 15 years in design and construction of loft conversions and home extensions in London and Hertfordshire areas and have worked out a unique calculation formula that you can find out to what your house extension and loft conversion will cost in seconds.


How can Lccl Construction be of help?


Do you require a loft conversion and house extension to add extra space?

Then look no further get in touch with us for a detailed free no obligation quote. We can accommodate a very quick turnaround. Our loft conversions and house extensions come with 10 year guarantee and 12 month workmanship guarantee.


Use our instant quote calculator for a quote about your project whether construction only or design and build.


Use our Free consultation call booking system to schedule a call at the time and date that suits you best.

Telephone: 020 8037 7332

Email: info@lcclconstruction.co.uk

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