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Swift UnlimitedExplore what’s possible
Bespoke Living AnnexesAward-Winning Designs15 Year WarrantyOver 18 years’ experience5 Star ReviewsFully Bespoke or Straight to SiteFriendly, Flexible and Capable ServiceComplete turnkey service — Design, Planning, BuildingYour Life, Your Choice, Your HomeSafe, Secure and Trusted
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Annexe project · Green Retreats

Garden living annexes by Green Retreats

Three annexe ranges from one of the longest-established garden room companies — the Den and the Nest under the Caravan Act, the Hide with full planning and Building Regulations.


Published 23 October 2025 · Updated 23 September 2026 · 3 minute read · Written by The Garden Room & Annexe Guide

Example of The Den range
Green Retreats  the Den, from the Annex Range

Green Retreats is one of the longest-established names in the garden room industry. Having built their reputation on well-specified garden rooms for work and leisure, they expanded their portfolio several years ago to include garden living annexes designed for year-round comfort.

Their latest signature range brings together everything they’ve learned about contemporary design and efficient off-site construction to create stylish, self-contained homes that can be tailored for relatives of all ages. Each annexe includes a kitchen, bathroom, and comfortable living/sleeping space, and can be built under the Caravan Act or with full Planning Permission and Building Regulations for permanent residential use.

At a glance

  • The range: three designs, each with a kitchen, bathroom and living and sleeping space, built off-site and tailored around the occupant.
  • The Den: mono-pitched and cubed, with a recessed entrance under a three-sided canopy; ten sizes; Caravan Act.
  • The Nest: pitched roof with a vaulted ceiling, a choice of cladding and a standing seam metal roof; thirty sizes; Caravan Act.
  • The Hide: a permanent home built to Building Regulations, with planning and Building Control approval included; seventy-eight sizes.
  • See them: several furnished examples at the Green Retreats showroom in Buckinghamshire.

Part of our one-bedroom annexe guide →

Visit the Garden Annexes website
A self-contained annexe
in your garden
No planning permission
required in most cases
Kitchen, bathroom & bedroom
— a home from day one
Fully fitted & insulated,
built in weeks
Based in Brighton & Hove,
building across England
Explore annexes →
Caravan Act

The Den and The Nest – Caravan Act compliant designs

Green Retreats’ Caravan Act annexes provide a quicker and more cost-effective route to creating an independent living space in your garden. These are not temporary units but well-specified, multi-layer buildings designed for everyday living.

Example of The Den range
The Den  recessed entrance under a canopy

The Den is the mono-pitched design in the collection, offering a stylish contemporary cubed form. We can see that it takes inspiration from a popular detail in Green Retreats’ garden room designs – a recessed front elevation framed by a three-sided roof canopy and decked step, creating a welcoming entrance into the space. The Den is available in ten size options, offering flexibility whether you’re designing a compact studio or a more generous home for a relative.

Example floor plan in The Den range
An example layout from the Den range.
The Nest annexe by Green Retreats
The Nest  pitched roof, standing seam metal

The Nest takes a different approach, featuring a pitched roof that creates a vaulted ceiling inside the room, adding a real sense of height and light. This design has a contemporary feel, with options to choose your preferred cladding finish and a standing seam metal roof for a clean modern edge. The Nest is available in thirty size options, giving plenty of scope to configure layouts and features to suit your needs.

Inside The Nest - the vaulted ceiling creates light and airy rooms
Inside the Nest  the vaulted ceiling
Inside The Nest range of annexes. Look at those high ceilings
The Nest  height and light

Both designs can be tailored around how you want to live. The Green Retreats team will help you plan the layout of rooms, positioning of windows, and finishes to create a comfortable space that feels just like a home.

Green Retreats' annexes feature well-specified kitchens
The kitchen
Inside The Nest annexe range
Inside the Nest
Full planning

The Hide – full planning and building regulation annexe

For those who prefer a fully regulated permanent home, The Hide is built to full Building Regulations standards and includes Planning Permission and Building Control approval as part of Green Retreats’ service.

Example of The Hide range
The Hide  eaves overhang on three sides

The Hide combines a modern aesthetic with practical comfort. A roof overhang creates an elegant eaves detail on three sides, giving balance and symmetry to the design while providing extra shelter around the entrance. With seventy-eight size options to choose from, the layout can be configured to suit your garden and lifestyle.

Layout option in a 12m x 4m annexe from The Hide range
A layout option in a 12m x 4m Hide.

As with all Green Retreats projects, the team will guide you through the approval process, ensuring your annexe meets all relevant standards while keeping the project as smooth and stress-free as possible.

The showroom

Experience the Annex Range

Visitors can explore The Annex Range in person at Green Retreats’ Buckinghamshire showroom, where several fully furnished examples show the scale, finish, and versatility of the designs.

These buildings have been created for year-round use, using high-quality materials, sustainable construction methods, and advanced insulation systems that Green Retreats has refined over many years of designing garden buildings for work, leisure, and living.

Planning something similar?

Learn more about Green Retreats

Discover the full Green Retreats Annex Range on their website, where you’ll find detailed information, floorplans, and video walkthroughs of The Den, The Nest, and The Hide. You can also visit their Buckinghamshire showroom to explore furnished examples in person.

Learn more about the Green Retreats Annex Range on their website, or chat with the team about your plans. You can call 01296 325 777, email info@greenretreats.co.uk, or visit their website to arrange a showroom visit.

Visit Green Retreats More Green Retreats projects
More projects like this One-bedroom annexes Two-bedroom annexes Open-plan annexes
Read the guides Garden annexes: the complete guide What an annexe costs The Caravan Act route Granny pods

Published 23 October 2025 · Photographs courtesy of Green Retreats.

Visit the Garden Spaces website
Visit the Timeless Garden Rooms website
Visit the Garden2Office website
A self-contained annexe
in your garden
No planning permission
required in most cases
Kitchen, bathroom & bedroom
— a home from day one
Fully fitted & insulated,
built in weeks
Based in Brighton & Hove,
building across England
Explore annexes →
Visit the Modern Garden Offices website

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Planning & building regs handled Self-contained homes Bespoke to your needs Independent living, close to home Ideal guest accommodation Fully project-managed build Fitted kitchens & bathrooms Insulated for year-round living Light-filled, open-plan living Handcrafted quality throughout Full-height glazing & bifolds One team, from design to completion
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Visit the Modern Garden Rooms website
A self-contained annexe
in your garden
No planning permission
required in most cases
Kitchen, bathroom & bedroom
— a home from day one
Fully fitted & insulated,
built in weeks
Based in Brighton & Hove,
building across England
Explore annexes →
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A self-contained home with its own kitchen, bathroom and bedroom.
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From £18,750 inc. VAT · base extra Hand-built on site, not prefabricated More than 350 garden rooms built Western Red Cedar as standard Electrical connection included Free site visit, in person or by video Building across the UK from Nottingham
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Two-bedroom annexes from £130,000

Room for two bedrooms, and a proper kitchen.

  • Two bedrooms and a shower room
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