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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 · Executive Garden Rooms

7m x 5m contemporary garden annexe

Three parts to a 35sqm footprint — a living space with an L-shaped kitchen, a double bedroom, and a shower room bigger than most annexes get.


Published 7 January 2018 · Updated 30 September 2026 · 3 minute read · Written by The Garden Room & Annexe Guide

Low maintenance granny annexe building
Executive Garden Rooms  7m x 5m, low-maintenance outside

Executive Garden Rooms designed and built this 7m x 5m contemporary garden annexe, a striking addition to their extensive portfolio of self-contained garden homes. This annexe has been thoughtfully designed to provide a comfortable and light-filled living space for one person.

At a glance

  • Size: 7m x 5m, divided into three — a generous living space with an L-shaped kitchen, a double bedroom, and an en-suite shower room.
  • Who for: designed as a comfortable, light-filled home for one person.
  • Foundations: traditional reinforced concrete rather than the pads some companies use — more groundwork, more long-term stability.
  • Also below ground: a pumping station and the piping to connect the annexe to the mains.
  • Light: a corner run of floor-to-ceiling glazing in the living space — French doors flanked by large windows whose upper sections open. A smaller corner window in the bedroom keeps the privacy.
  • Kitchen: high-gloss, with base and overhead units, inset hob, sink, electric oven, plumbing for a washing machine and an under-sink water heater.
  • Warmth and wiring: insulated beyond new-build standards, heated by two electric wall panels; 18 recessed LED downlights, an external security light, two smoke alarms and hardwired Cat6.

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 →
The service

Comprehensive turnkey service including planning applications

Known for their fully managed approach, Executive Garden Rooms are experienced in creating self-contained granny annexes. Their turnkey service ensures a seamless process from initial consultation and bespoke design to final build, including handling all planning and Building Control applications. Unlike many other companies, Executive Garden Rooms include these essential applications as part of their overall service, providing clients with peace of mind and hassle-free project management.

Below ground

Extensive groundworks and reliable foundations

Upon securing planning approval, the team begins on-site groundworks. This particular project required extensive groundwork preparation before construction could commence. Executive Garden Rooms favour traditional, reinforced concrete foundations for their annexes, offering long-lasting stability that many buyers prefer over the pad foundations used by other companies.

Additional excavations were also needed to install a pumping station and to lay piping for connecting the annexe’s utilities to the mains supply.

Inside

Bright and comfortable living space

The design brief focused on creating a spacious, one-bedroom home with ample natural light. The 7m x 5m annexe footprint was divided into three main areas: a generous living space incorporating an L-shaped kitchen, a double bedroom, and an ensuite shower room.

The interior of the annexe is finished like a new build house
The living space
The garden annexe has a well equipped kitchen with high gloss units
The kitchen  L-shaped, high-gloss

The high-gloss kitchen is well-equipped, featuring both base and overhead storage units, good work surfaces, an inset hob, and a sink. The kitchen also includes an electric oven and provisions for a washing machine, with an under-sink water heater ensuring instant hot water.

Natural light floods the main living area through a stylish corner section of floor-to-ceiling glazing, consisting of French doors flanked by large windows. The upper sections of these windows open for convenient ventilation.

The main room has a corner section of floor to ceiling glazing
Corner glazing  French doors flanked by windows

In the bedroom, a smaller corner window setup allows for light while maintaining privacy. This thoughtful design leaves space for the bed and wardrobes.

The bedroom has a smaller corner window
The bedroom  a smaller corner window

The ensuite shower room is more spacious than typical annexe layouts and includes a large shower cubicle with a glass door, a washbasin set into a vanity unit, and a toilet.

The shower room is bigger than we often see in garden annexe design
The shower room
A spacious shower cubical has been installed
The cubicle
Warmth and wiring

Heating and electrical features

Compliant with Building Regulations, this annexe is insulated to exceed new build standards. However, heating is still necessary for colder days. For this project, two electric wall panel heaters were chosen to maintain a cosy environment.

The electrical setup includes numerous double power sockets strategically placed throughout the annexe, 18 recessed LED downlights, an external security light, and two smoke alarms for safety. Internet connectivity is assured through hardwired Cat6 data cabling.

Planning something similar?

Learn more about Executive Garden Rooms

For more information, contact the Executive Garden Rooms team on 01202 874 766 or via email at info@executivegardenrooms.co.uk. Visit their website for further details.

Visit Executive Garden Rooms More Executive Garden Rooms projects
More projects like this One-bedroom annexes 35–45 sqm annexes
Read the guides Garden annexes: the complete guide What an annexe costs The Caravan Act route Granny pods

Published 7 January 2018 · Photographs courtesy of Executive Garden Rooms.

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 →
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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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