An extra bedroom

The Sanctuary is an ideal annexe for those who simply need an additional sleeping space. A more cost-effective way to increase bedrooms on your property than moving house, the Sanctuary is a popular choice. This annexe comes with an open plan bedroom/living room and a bathroom as standard. As for the finishing touches, the choice is yours!

Being our smallest annexe, coming in at 15sqm – 20.5sqm, customisation is largely in your finishing touches rather than functionality. But the team at Custom Garden Rooms are always up for a challenge, so if you want something a little different or would like to add a kitchenette to your Sanctuary annexe, just let us know!

Compact living, your way.

Sanctuary is unique in its own right, but you can make it even more bespoke to your needs using our extensive range of optional extras and layouts. We design for what you require, so speak to us and we can work out what floor plan works for your, the choice really is yours.

Floorplans are examples of how to customise a Sanctuary annexe, not the final product. You’ll be provided with a bespoke floorplan for your build.

Standard Features

  • Structural

    • Full building regulations compliance and sign off
    • 15-year insurance backed structural guarantee
    • Galvanised Groundscrew base
    • Structure built from c24 4×2 structural timbers
    • EPDM Rubber roof with a 50 year life expectancy

  • Design

    • Shower room and toilet (options available)
    • Kitchenette (options available)
    • Room configuration – up to 2 bedrooms

  • Insulation

    • Fully insulated – compliant with building regulations

  • Electric

    • Full electrics to include 4 double sockets, internal/external lights and 2-way consumer unit – site hook up is quoted separately
    • Electric radiators

  • Doors & Windows

    • High Performance UPVC French doors and 3 windows

  • Finishes & Trims

    • Painted and plastered walls, finished in a colour of your choice
    • Tanalised redwood cladding

  • Flooring

    • Laminate floor of your choice

Customisable Features

  • Base

    • Resin plate system for concrete slabs

  • Insulation

    • Upgrade for more acoustic sound insulation in walls and ceilings – perfect for music rooms, cinemas or office privacy

  • Electrical

    • Extra lighting and socket options
    • USB sockets
    • Downlighters
    • Exterior motion sensor
    • Cat 6 ethernet cable

  • Doors, Windows & Glazing

    • UPVC anthracite French doors in multiple sizes
    • UPVC anthracite Slide doors in multiple sizes
    • Aluminium anthracite or black French doors in multiple sizes
    • Aluminium anthracite or black Slide doors in multiple sizes
    • Aluminium anthracite or black Bifold doors
    • Selections of different styles and sizes to suit building
    • All seasons thermally efficient solar glass
    • Integrated blinds (within glass)

  • Finishes & Trims

    • Thermowood
    • Larch cladding
    • Cedar cladding
    • Composite cladding in a choice of colours

  • Flooring & Decking

    • Vinyl-click
    • Engineered wood floor
    • Anthracite composite decking

Our styles explained

Here’s a breakdown of each of our styles so you can see the key differences between them. All our garden annexes are built to a very high quality, and the specifications of each are fully interchangable, meaning you can get creative, designing an annexe that perfectly fits your vision and requirements if there’s something specific you have in mind. Need some help? We can guide you through a design process, using our years of experience and creativity!





Master bed

Bedroom 2





Living Room


Fully customisable

Our commitment to building Annexes that are bespoke to your needs is what sets us apart from our rivals. Everything from flooring to fascias, through to size and shape is fully customisable.


Any space. Any size.

The Custom Garden Rooms team are always up for a challenge. We use our years of industry experience and knowledge to create your Annexe in any space, and to fit any size.


Planning permission required

Annexes are ‘habitable’ spaces, so they may require planning permission. Although this makes the project timelines longer than our custom made Garden Rooms, the benefit of having the options of living and sleeping in these bespoke built rooms is a huge benefit.

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