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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

One-bedroom granny annexe with well-equipped kitchen

Thirty-six square metres for a lady moving in beside her niece, built round an L-shaped kitchen larger than most annexes get — a keen cook need not give it up on moving.


Published 6 October 2020 · Updated 30 September 2026 · 2 minute read · Written by The Garden Room & Annexe Guide

Granny annexe with well-equipped kitchen by Executive Garden Rooms
Executive Garden Rooms  8m x 4.5m, one bedroom

This stylish garden annexe by Executive Garden Rooms features one of the largest kitchen areas we’ve seen, proving that a keen cook doesn’t need to give up their passion when downsizing.

This custom-designed annexe was created for a lady moving to her niece’s home, allowing her to be part of family life while maintaining her independence.

Executive Garden Rooms have extensive experience in designing self-contained living annexes. As bespoke designers, they work closely with each client to create a building tailored to their needs. Clients can choose from a wide range of materials, allowing them to achieve the look they desire.

At a glance

  • Size: 8m x 4.5m, 36 sqm — a bedroom with an ensuite shower room, and an open-plan living room with the kitchen in it.
  • The kitchen: L-shaped and among the largest we have seen in a granny annexe, with a single oven, induction hob, extractor fan and integrated fridge.
  • Water: a 125-litre pressurised system in a utility cupboard beside the kitchen, so the main house drawing water does not affect the supply.
  • Light: a glazed stable door by the kitchen, sliding doors onto the garden, and a large Velux worked by remote with rain sensors.
  • Cladding: two walls in Western Red Cedar treated with UV oil, two in dark grey Cedral board.
  • The site: it sloped, so a retaining wall went in as part of the groundworks.

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
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The service

From planning to final connections

Executive Garden Rooms offer a complete turnkey service, managing all aspects of the project from start to finish. This includes the initial design phase and handling the Planning Application required for living accommodation like this. They then oversee the entire build, including the groundwork for foundations, and trenching for plumbing, sewerage, and electrical connections. All work is signed off by Building Control, ensuring a fully compliant build.

The Cedar cladding has been protected with a UV-oil
Cedar  UV-oiled to hold its colour
A retaining wall was built as the site was sloping
The retaining wall  the site sloped
Layout

8m x 4.5m one-bedroom annexe

At 8m x 4.5m, totalling 36 sqm, this is a generously sized granny annexe. The layout includes a bedroom with an ensuite shower room, and an open-plan living room with a well-equipped kitchen.

36sqm granny annexe by Executive Garden Rooms
The plan: 36 square metres, bedroom and ensuite off an open-plan living room.

The L-shaped kitchen is one of the largest we’ve seen in a granny annexe. It is well specified, featuring a single oven, induction hob, extractor fan, and integrated fridge.

Adjacent to the kitchen is a utility cupboard that houses a 125-litre pressurised water system, ensuring the water supply in the annexe remains unaffected, even when the main house is using water.

L-shaped kitchen with large Velux roof window
The L-shaped kitchen  under a large Velux
Ensuite shower room in the Executive Garden Rooms self contained annexe
The ensuite
A 125 litre pressurised water system has been fitted in the annexe
The pressurised cylinder  125 litres, in the utility cupboard
Light

Naturally light living space

As shown in the photos, the living space is wonderfully light and airy. A glazed stable door near the kitchen provides convenient access, while a large set of sliding doors on the front wall opens onto the garden.

The pièce de résistance is the large Velux window installed in the roof. This electronically controlled window comes with a remote control and rain sensors, automatically closing when it detects rain.

Outside

A mix of contemporary claddings

The exterior of the annexe is stylish, thanks in part to the mix of claddings. Two walls are clad in Western Red Cedar, which has been treated with UV oil to prevent it from weathering to silver. The other two walls are clad in dark grey Cedral board, a cement fibre board coloured during the manufacturing process that doesn’t require painting to maintain its colour.

One bedroom granny annexe by Executive Garden Rooms
Two claddings  Cedar and dark grey Cedral
Planning something similar?

Learn more about Executive Garden Rooms

To learn more about creating a self-contained living annexe, contact the Executive Garden Rooms team on 01202 874 766 or email info@executivegardenrooms.co.uk. You can also explore their website for more information about their buildings.

Executive Garden Rooms are based in Dorset and focus on projects in the South of England.

Visit Executive Garden Rooms More Executive Garden Rooms projects
More projects like this Granny annexes 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 6 October 2020 · Photographs courtesy of Executive Garden Rooms.

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A self-contained annexe
in your garden
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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 annexe
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