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    • The Annex
          • The Annex specialises in permanent living solutions, creating garden houses complete with a kitchen and bathroom. Available in two customisable designs.

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Using our configurator you can design your perfect garden office with minimal effort, ensuring it’s tailored to your own personal preferences and specifications.

You can get a great idea of how your new garden office will look by using the 360 degree rotating viewer.

Also compatible with mobile and tablet devices

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Annex 1

Compact classic design

Our Annex 1 design combines contemporary vertical cladding with classic compact styling. Perfect for maximising space in the garden, the Annex 1 gives you maximum internal space without compromising on looks.

See The Annex 1

Annex 2

Modern contemporary styling

Our Annex 2 range is designed to look as good from the outside as it does from within. Wraparound glass corners, a composite deck step and a stylish overhang make this one of our most popular designs ever.

See The Annex 2

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The Process

We’ve used our years of experience to make the process as simple for our customers as possible. Understanding you'd rather not deal with third parties in the process, we offer an all in one garden annex solution. Simply sit back and let us take care of the rest. Our vast experience of installing buildings for every use means we are well placed to help you along your journey.

Our Buildings

We take great pride in the design and build quality of your annex. All of our garden annexes are signed off by building control and come with a comprehensive 10-year guarantee. We have to meet the same insulation requirements as a new build house, so you can be sure your garden annex will keep you warm, whatever the weather outside.


Our external wall sections are based on the design of a modern timber framed house.

3mm Plaster Skim

Insulated plasterboard

A cavity for your wires and pipework

Timber frame mounted SIPs panel

Photonwrap Breather Membrane

Cavity Gap

17mm External cladding

External cladding is all treated with a fire-retardant coating.

We can install partition walls to create additional rooms in your annex. Our internal walls featuring sliding doors feature 4x2 studwork backed both sides with plasterboard. All other internal walls feature 3x2 studwork double lined with both a melamine panel and plasterboard.

Our external walls are clad as standard in FSC certified Norwegian redwood. We offer upgrades to a honey redwood and cedar, and slatted redwood and honey.

All walls are painted white as standard. If you would like your building painted a specific colour, just provide our painters with the paint colour of your choice and we will use this for you.

Foundations and Floor Panels

Our foundation system is a screw method. The suitability of this foundation type is assessed during your site survey where we will inspect your ground and check the length of screws required.

Once the foundations are laid, the team will install a 6mm steel plate attached to a screw which allows us to adjust levels. We use a laser level to ensure your plates are completely level before laying the floor panels.

Our floor panels are structurally insulated panels, featuring 100mm of insulation, sandwiched between powder coated steel. On top we lay an underlay and your choice of laminate flooring.


We use Kingspan structurally insulated panels on your roof. These 5-part panels feature a powder coating to the underside, a layer of steel and 120mm-151mm of insulation. Another layer of steel sits on top and an epoxy resin is applied to the surface to protect the steel. Our one-meter wide panels have a core thickness of 120mm and peak at 151mm at the ridge. We screw plasterboard to the underside of the panel which is plastered and painted ready for you to move in.

Doors and Windows

Our doors and windows are all made by Clear Edge. Clear Edge are one of the leading suppliers of garden room and residential doors and windows in the UK. All door and window locking mechanisms meet the latest insurance standards. Glazing u-values exceed UK building regulations and we install toughened glass in all units.

All buildings come with a 1.45 or 2.3m wide French door set as standard. We also include an opening rectangle and an opening lozenge window with every annex. We also offer a range of larger French doors, sliding doors and bi-fold doors as upgrade options. Every building must be installed with a low threshold French door to be signed off by building regulations. All habitable rooms (bathrooms and hallways are excluded) must have a either an opening door or a rectangle opening window as an escape route.

We also offer a range of picture and full height windows which are available to allow more light into your garden annex. Doors can be located on any front elevation and windows can be located on any elevation. Window location and size may be restricted on elevations built closer than one meter from your property boundary.


Our garden annexes come with a fully installed kitchen as standard. This includes an oven, induction hob, extractor hood and a sink with hot and cold water. We also include a fully integrated 70/30 Fridge/Freezer. You can upgrade to a 6-unit l-shaped configuration which adds a washer or dishwasher, or our 8-unit l-shaped design, which includes a microwave and both a washer and a dishwasher. We also offer a micro 2.5-unit kitchen for those looking to use their space in different ways.

Upgrade options include:

  • - Top cupboards
  • - Microwave
  • - Washer/Dryer
  • - Dishwasher

We offer a range of three different worktop surfaces, three different door colour options and three different splashback options.


We include a 2850mmx900mm, 2000mmx1400mm, 1900mm x 1900mm or 3350mm x 900mm bathroom as standard.

Standard Options to pick from
Softclose Toilet and Sink 3 different colours of shower unit
Aqualisa Quartz electric shower 3 different shades of wall tile board
Low profile shower tray 3 different shades of bathroom cabinet
Heated towel rail  
Vanity Unit under sink Additional Extras
Water heater under sink Heated Wall Mirror
Extractor Fan Shaver Socket
3 different bathroom floor colours  


Every annex comes as standard with the following electrics:

  • - 5 double recessed white sockets
  • - Smoke Alarm system
  • - Wall mounted eco smart heaters with digital display
  • - Electric towel rail in the bathroom
  • - 2 light panels, or 2 tracks, or 4 up-down
  • - IP rated bathroom light
  • - External up-down/torch light

Electrical upgrades available:

  • - Additional double sockets
  • - Brushed aluminium sockets
  • - USB socket upgrades
  • - Bathroom shaver socket
  • - Underfloor Heating
  • - Air Conditioning
  • - External up-down/torch lights
  • - LED deck and hood lights
  • - TV aerial
  • - Network points
  • - Network switch
  • - Wi-Fi router
  • - Additional light panels, track lights, up-down lights, wall lights, IP rated bathroom lights.
  • - Recessed ceiling includes LED down lights

We include up to 20m of 35mm armoured cable, connection to the fuse box in both your home and the building and our electricians will issue a part p certificate. Our onsite consultants can give you additional pricing for longer runs at your site survey.


Plumbing and ground works

We include the following as standard:

  • - Up to 10m of cold water piping, including connection both ends
  • - Up to 10m of foulage piping, including connection both ends
  • - A soakaway

Additional levelling, additional pipework and septic tanks or pumping stations for uphill connections are available as an upgrade. The route and requirements will be confirmed at your technical survey. Drain covers will be left raised to allow our customers flexibility when landscaping.

Annex 2 Annex 2
Annex 1 Annex 1

Annex 1

From £81,745

Compact classic design

See The Annex 1

Annex 2

From £81,745

Modern contemporary styling, overhanging roof, extra window & decking step

See The Annex 2