Annexe Style - Bespoke From



No problem - we can make to measure



granny annexe-2-bed

A Granny Annexe from Rubicon is truly a safe and comfortable home from home. It’s built to Housing Standards with exceptional levels of insulation, ensuring your loved ones will not only be super cosy, but the costs of heating will be minimised, even in the most extreme of winters.

Looking after an elderly relative these days is an expensive business with care home fees reaching extortionate levels. With residential care now costing anything from £40-£60,000 a year and the inherent health risks within communities of elderly residents (Covid risks etc), it makes sense to keep your loved ones close.

They can enjoy independent living, safe in the knowledge that a caring relative is just across the lawn in case of need. It makes sense economically too, with the cost of installing a luxury granny annexe in your garden often being recovered within 12-18 months of installation when compared to external residential accommodation.

For elderly relatives, selling the family home can be a traumatic and emotional experience. But when their home becomes too big to manage and with health deteriorating, liquidating this asset will free up substantial funds, enabling not only the purchase of the granny annexe, but also savings which can be banked for future security.

Furthermore, a granny annexe is well known to add value to your property, so instead of wasting huge sums on residential care homes, your investment is not wasted as you retain the asset value.

Even a large 2 or 3 bedroom Granny Annexe of up to 20m x 6.5m can often be built in your garden without Planning permission, incorporating lounge/diner, double bedrooms, toilet, shower room and kitchen. PRICED FROM £49,995 (8m x 4m) everything can be made to your requirements with this model, but standard specifications include (model shown with cost optional front and side canopies):


-       Comfortable All-Year Round Living

-       Full Turn-Key Build & Installation (incl external services at extra cost)

-       True Zero Maintenance Wood Fibre Composite Exterior Cladding

-       Natural Wood, or Coloured Render Cladding as cost options

-       Front or Side Canopies (incl Downlights) as cost options

-       French or Sliding UPVC Doors as standard

-       Fully Plasterboarded & Skimmed Interior 

-       Laminate Floors or Carpets included

-       Super Warm Insulated & Certified U-Values

-       Concrete Pile/Pad Base Included

-       20yr Treated Timber Frame Guarantee

-       20yr Composite Roof Guarantee

-       Fully Breathable & Ventilated Structure to avoid mould/damp

-       Fully Underboarded for Vermin Control

-       28mm Triple Glazed UPVC Doors/Windows as cost option (Double Glazed as standard)

-       Comprehensive Electrical Package inc 2Kw Wall Heaters

-       High Specification Toilet/Shower and Kitchen

-       Fully Decorated

-       Prices Include Fitting & VAT

-       Built to Housing Standards - it’s Like a House, Not a Caravan!


Fully transportable, prefabricated dismountable structure. Bespoke, Made to Measure sizes available. Full Turn-Key Package. Top of the range specifications. UPVC French or Sliding Doors as standard. Aluminium Bi-Folds or Sliding Doors as a cost option. Fully insulated for year-round comfort with the equivalent of 300mm of fibreglass in the Roof and 200mm in the Walls and Floor.

Offered with optional front and/or side canopy. The top section incorporates a UPVC soffit and fascia board with Composite Cladding as standard. Cedar or Render cladding is a cost option. Final cost depending on customer specifications.


Made to Measure - built to fit your available space.  


Deduct 350mm from width and depth to establish approximate interior floor space.


This building can have normal housing ceiling heights under current Regulations.


Mounted on galvanised 6ton steel legs. Pre-installed Concrete pile/pad base to suit ground conditions included.


Fully Insulated & Ventilated Cavity Walls comprising: Overall thickness 170mm (approx); 19mm Cedar (cost option), Wood Fibre Composite or Self-Coloured Render Cladding (cost option); Ventilated Cavity; Du-Pont Tyvek (or similar) Breather Membrane; 11mm OSB3 Exterior Grade Sheathing for rigidity; 96mm x 47mm (approx) treated C16 or C24 structural grade timber frames; standard 100mm (approx 200mm fibreglass equivalent) Foiled Foam primary insulation layer; Vapour Control Membrane; 12.5mm Plasterboard and skim to interior walls; 3” White Skirting around base of interior walls.


Our standard supply is a Zero Maintenance Wood Composite cladding material with a manufacturers 10 year guarantee offering true ZERO maintenance, unlike timber cladding (see FAQs for explanation).  Self-Coloured Render or Cedar cladding is offered as a cost option if preferred.


Fully Insulated Floors comprising: (minimum) 125mm tanalised treated C24 Floor Joists; Double Joist Perimeter; Adjustable 6 Ton rated Steel Galvanised Legs; 100mm (approx) Composite Foile Foam Insulation, under-boarded with metal skins for rodent protection; Heavy Duty Damp Control Visqueen Membrane; 22mm Industrial Grade Moisture Resistant Floor Boards. Composite Laminated floor finish or carpets


Fully Insulated Roof comprising: 20 year guaranteed Composite Roof Panel; 150mm (approx 300mm fibreglass equivalent) Composite Metal skinned Roof Panel with 12.5mm Plasterboard and skim.


Black plastic gutters and downspouts connected to Water Butt with integral tap. Black and Grey UPVC Fascias 


Secured by Design (SBD) specifications for extra security; 28mm Double Glazed (Triple Glazing as cost Option) twin or single doors (Sliding Doors extra cost option) in Grey outside/white inside (other standard RAL colours no cost option, special colours at cost) UPVC (aluminium available as a cost option); Insurance Rated Multipoint security locking system; Pilkington's Reflective 28mm 'K' Glass as standard. 


28mm Double Glazed (Triple Glazed cost Option) in Grey outside/white inside (other standard colours no cost option, special colours at cost) UPVC (aluminium available as a cost option). Pilkington's 'K' 28mm Reflective Glass as standard; SBD Insurance standard Security Locks.


All assembled with stainless steel, galvanized or green coated exterior fixings.


Minimum 6 Gang RCD protected Consumer Unit; LED Ceiling Spotlights to suit size of room; minimum 10 Double Switched Sockets; interior Light Switches; all fascias in brushed or chromed steel; Exterior Water-Proof Socket; 2 Exterior Wall Lights and canopy downlights (where canopy specified); 2KW Electric Convector Heaters to main living areas with Timer and Thermostat; external Connector Box for incoming SWA electrical cable - connection of Granny Annexe to incoming services by others or priced upon application


All Structural Floor, Roof and Wall Timbers pressure preservative treated for minimum 30 year life expectancy


Your fully transportable Granny Annexe Building will arrive with our trained installers ready for full site assembly by us on our own base pads (excludes armoured electrical mains supply cables and connection of incoming services, priced extra if required due to variable site requirements). 


Click HERE for a list of areas that may incur additional delivery charges.

We primarily operate across the Chester, Cheshire, Wrexham, Wirral, Deeside, Flintshire, Denbighshire, North Wales, Manchester, Lancashire, Liverpool, Warrington, Crewe, Nantwich and Shropshire areas, but welcome enquiries within around 100 miles of our Deeside base.



  • Purchase Options
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  • Base Recommendations
  • Delivery

FULLY ASSEMBLED OPTION - Your Garden Building will arrive at your chosen address with our trained installers. We will provide specialist pile foundations and will fully assemble your building, including internal plaster skim and electrical wiring to our RCD electrical consumer unit. Please note, we will not provide any interior painting nor an external electrical supply from your house to your new Garden Building unless contracted to do so separately. Click HERE for a list of areas which incur extra delivery charges.


In order to ensure that your RUBICON™Garden Building is installed in the correct manner it is important that the following Requirements are understood:

1) Ground conditions must be suitable for the installation of concrete pile foundations or cast in-situ concrete pads unless a suitable existing concrete slab is already in place. We can advise on this during our FREE site survey

2) Our quoted price for your RUBICON™Garden Room assumes that the area where the Building is to be fitted is reasonably flat. Although the feet of the building are adjustable by up to 18" there are limits which can incur additional costs. We will identify if this is the case during our FREE Site Survey.

3) From a Planning Permission perspective, most of our buildings can be fitted right up against your neighbouring walls or fences. However, we normally require a minimum of 600mm (2') clearance to three sides (unless you have permission from your neighbour for us to access via their land) and usually 2m to the front elevation of the building to facilitate access for assembly, and to allow us to take the necessary Health and Safety precautions on behalf of our fitting teams.

4) Some components of our buildings are very large and heavy, such as the panel assemblies which can be up to 10' x 4' and 200mm thick weighing in excess of 60 kilos. Consequently, it is important that access to site is unencumbered and free of obstruction. Please note: Access to site via an internal route through an existing building is not usually practical or permissible - check with us first.

5) Vehicular access to the front of the property at which the Garden Room is to be installed needs to be suitable for a large delivery vehicle, with adequate space for unloading large quantities of material. Talk to us if you think this may be a problem - we can usually find a solution...!

6) The area where your Garden Room is to be assembled should not be overgrown by hedges, trees, vegitation or other material obstructions or debris such that would impede our installation team, cause them potential physical harm (hawthorn hedges etc), or undue delays in having to clear the site and surrounding area prior to starting work.

7) You will need to ensure that there are no overhead or underground services such as electricity, water, telephone, gas or drainage which will impair our ability to install your Garden Room on the proposed site. Again, we can help to confirm this during our FREE Site Survey visit.

8) We will require access to a suitable 240v 50Hz mains electricity supply and mains running water for our staff during normal working hours, typically from 8:00am to 6:00pm each working day.

We now only supply/install within approx 60miles radius of our Deeside base (CH5)

Delivery is FREE within this area

Specifically, we NO LONGER supply to the following areas due to the distances and logistics involved:

All areas outside of the UK mainland


Greater London

South & SE beyond London 

South beyond Stoke on Trent


North beyond Preston and Manchester

Hastings, Dover etc


Norfolk Broads

Wiltshire & SW




Scotland & Isles

The Borders beyond Shrewsbury

mid Wales beyond Welshpool

South Wales

Northern Ireland