01625 875588 support@swiftorg.co.uk

Keeping your loved ones close.


This striking granny annexe has been finely tuned to the specific preferences and needs of this London-based family.   As with all garden rooms that will be used for regular overnight accommodation, planning permission was gained and building regulations met.


Project Overview

Size: 11m x 6m
Cost: £119,380 incl. VAT*

Use: Annexe
Location: Harrow

Doors & windows: 1 set of aluminium sliding
Walls, floor & ceiling: BBA certified, engineer-approved SIP structure.
Decking: Extended stepped design

Air conditioning: Yes

*Estimated current Cost – subject to change

Living annexe exterior

Key bespoke features…

  • Large shower room / WC
  • Bespoke fitted kitchen
  • Planning Permission and Building regs
  • Two sets of internal pocket doors
  • Climate control, through twin air-sourced heat pump systems.
  • Beautifully finished throughout
  • Cedar cladding and custom doors/windows
  • Completed in 4 weeks
Living annexe exterior
Living annexe interior


“Swift provide a quality product with an exceptional finish delivered by a superb team. I could not recommend them highly enough, you need to experience the service and product first hand if you are in the market for high-quality outbuilding.”


Living annexe kitchen interior
Living annexe bathroom
Living annexe
Annexe floorplan

Let’s build something together!

We only use the very best materials and installers to ensure that your garden room is a solid, efficient and durable feature. You will also receive a 10-year insurance backed structural warranty as part of our service. Give us a call, or send an email using the details below, or we can call you. Just complete this brief form and we’ll phone you at your specified time.

T: 01625 875588
E: support@swiftorg.co.uk

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