Garden Annexes
The Diamond
A self-contained 24ft × 17ft (7.32m × 5.19m) annexe — bedroom, fitted kitchen and bathroom. No planning permission under the Caravan Act.
- 25 Year
- Guarantee
- Free
- UK Delivery
- Zero
- Maintenance
Garden Annexes
The Diamond
The Diamond is a self-contained garden annexe with a footprint of 24ft × 17ft (7.32m × 5.19m). It includes a full fitted kitchen and bathroom and is insulated for year-round living. Supplied to comply with Section 13(2) of the Caravan Sites Act 1968, so for a family member in a correctly positioned annexe no planning permission is required — and the price includes VAT. Free delivery and installation in mainland England are included, backed by our 25-year structural guarantee.
Configure your annexe
£27/sq ft · optional
£35/sq ft · optional
Your total · to buy
—
Inc. VAT, free delivery & installation in mainland England
Your configuration
- Size —
- Flyover depth —
- Decking depth —
That exact size isn’t a standard build for this model — adjust the width or depth, or ask us for a bespoke quote.
Rent: £5,995+ install · 24-month minimum.
Specifications
What's included as standard
Every The Diamond, fully fitted
- ✓ 90mm top-class Ecotherm insulation in floor, walls and roof
- ✓ A-rated double glazing (triple-glazing equivalent), full-length front windows
- ✓ 4 double mains sockets
- ✓ 2 outside PIR movement-sensor lights
- ✓ Mains connection up to 40 metres
- ✓ Internet via TP-Link router
- ✓ Recessed blinds and lighting included
- ✓ Adjustable concrete feet — no concrete base, portable/relocatable
Optional extras
What's already in the price — and what isn't
Every annexe price already includes air conditioning, fitted kitchen, full bathroom, blinds, interior lighting, commercial-grade flooring, groundworks up to 20 metres, and electric supply & certification up to 40 metres.
Quoted at site survey
- + Groundworks beyond the included 20 metres
- + Electrical or mains run beyond the included 40 metres
- + Decking, flyover roof and skirting upgrades
- + Sloped-site adaptations and restricted-access installs
- + White goods (fridge, microwave, etc.) and furniture
And, like every Booths building
A zero-maintenance exterior
Built from steel and UPVC — no external timber. It never needs painting or staining, so you are never left maintaining a building, and it keeps its just-installed look for the full 25 years.
The UK’s only 25-year guarantee
A 25-year structural guarantee on the building itself — not a one or two-year warranty. It is built, and warranted, to be used for decades rather than treated as a temporary garden room.
Portable — and still an asset
Every building is 100% portable. If your circumstances change it can be lifted out and relocated, or sold on, so it stays a resaleable asset rather than money sunk irreversibly into the house.
Customer Stories
Customers with The Diamond
The Diamond — your questions
Can I attach my annexe to my house?
No — annexes cannot attach to existing properties, but can be positioned within about 2 inches of the home or garage.
How do I buy a garden annexe?
A £1,000 deposit reserves your installation date; you pay nothing more until the groundworks team arrives. Designers email floor plans and conduct a site visit to finalise the design, which must be confirmed 15 working days before installation.
What height is my garden annexe?
All annexes are 2,500mm tall, which falls within permitted development for garden structures.
What is included in the annexe price?
Groundworks (up to 20m), electrical connections, air-conditioning heating/ cooling, flooring, blinds and exterior lights — plus the 25-year guarantee.
Is my garden annexe insulated?
Yes — 90mm Ecotherm flooring and 90mm Actis wall/ceiling insulation. As an annexe faces weather on six sides, robust insulation is essential.
Listed building or AONB — can I still have an annexe?
Contact your council and emphasise the low carbon output — some planners have approved installations. Material samples are available on request.
Will I need planning permission for my annexe?
Annexes for a family member comply with the Caravan Act and qualify as permitted development, avoiding planning permission. See the Planning Permission page for the full conditions.
What are your most popular annexe sizes?
The Squire (16'x17'), Rockingham (20'x17') and Lincoln L-shape (24'x8' / 12'x8'). For smaller gardens, 20'x8' or 24'x8' with kitchen and bathroom are favoured.
Get your free quote for The Diamond
Tell us a little about your garden and what you need. We’ll do our best to come back to you the same working day.
Prefer to talk?
07746 665560Want to speak to someone straight away? We pride ourselves on quick, friendly replies — contact us now →