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Beautiful glazing, bespoke design

One of the many joys of installed a Spaces Annexe is the freedom to design something truly stunning, yet exceptionally energy efficient. As our website images reflect, most choose to incorporate bi-folding and / or sliding doors and full height windows, particularly in their living areas, giving great views, a sense of spaciousness and a connection with the outside, from within. Our experienced designers will work with you to create your perfect living space, with its bespoke glazing layout.

Energy efficiency at its best

Current regulation demands outstanding energy performance from any new building (Building Regulations Part L1A - new domestic buildings). Our buildings are exceptionally thermally efficiency due to the structural building materials used and the high performance glazing we recommend throughout. We use SBEM (Simplified building energy model) to calculate energy consumption and emissions and to produce the EPC (Energy Performance Certificate) for your new building.

Bi-folding and sliding doors

Opening onto an area of anti-slip decking, bifolds and sliding doors truly extend your living space. In the winter, you will enjoy better natural light and additional warmth through solar gain and in the summer, you can open them fully to extend your dining and seating areas.

High Performance Glazing:

To achieve the energy efficiency required by government, we strongly recommend high performance glazing, which offers many advantages:

  • PLANITHERM technology for outstanding energy efficiency
  • Minimises UV rays
  • Argon filled double glazing
  • Easy clean
  • Toughened glass
  • Opaque glass (optional)

Your choice of frames and colours

We use quality uPVC and powder coated aluminium frames (depending on your budget) and you can choose from a wide range of RAL colours allowing you to match your Annexe with surrounding buildings is desired. Please note: Bi-folding doors are only supplied with powder coated aluminium frames.


All our windows and doors come with high security locks as standard with optional extras such as PIR security lighting available.

Window dressing

Your home needs to feel welcoming and comfortable. Whether your taste is contemporary or more traditional we can provide the perfect finishing touches to your home by installing integral blinds (these sit within the glazed unit) and wooden or aluminium blinds (on the outside of the glazed unit).