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Annexe project · Annexe Spaces

En-suite garden bedroom

The house extension was refused. The garden bedroom that replaced it was approved — 6.4m by 3.4m, rendered on three sides and finished like a new build.


Published 9 December 2017 · Updated 30 September 2026 · 2 minute read · Written by The Garden Room & Annexe Guide

The white render looks crisp with the dark grey doors
Annexe Spaces  white render against dark grey doors

Garden rooms and annexes are versatile buildings that can provide the ideal solution for creating extra space when other types of home extensions aren’t an option. This project, completed by Annexe Spaces, is a great example of how a compact en-suite garden bedroom can add functional living space.

The customer initially sought to extend their property through a house extension, but the planning application was rejected. After reassessing their needs, they turned to their garden as a way to create the extra room they required. The design for the en-suite garden bedroom was subsequently approved, and the project moved forward.

At a glance

  • How it came about: a planning application for a house extension was rejected, so the family looked at the garden instead. That design was approved.
  • Size: a 6.4m x 3.4m footprint — a main room of 4.78m x 3.08m and a shower room of 1.2m x 3.4m.
  • The finish outside: Silicon K-Render on the three visible sides, a cement-based system with silicone in it to repel water; the rear elevation is cement particle board painted to the same RAL colour as the doors, windows and roof trims.
  • Shower room: a 1200mm x 900mm tray with a curtain, fully tiled, with an extractor fan as Building Regulations require, and a modern towel rail.
  • Inside: oak-effect laminate, walls and ceiling plastered and decorated, wired to Part P — 8 LED downlights and 6 double sockets in brushed steel.
  • Why it is unusual: very few garden building companies offer a rendered finish at all.

Part of our open-plan annexe guide →

A self-contained annexe
in your garden
No planning permission
required in most cases
Kitchen, bathroom & bedroom
— a home from day one
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built in weeks
Based in Brighton & Hove,
building across England
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Outside

High-quality render finish

We appreciate the simplicity of the design and the selection of materials used. Annexe Spaces is one of the few companies that offers a rendered finish on their buildings. They use Silicon K-Render, a specialist cement-based system that incorporates silicone, helping to repel water and keep the render looking fresh. The breathable, pre-coloured render doesn’t require painting. In this case, the customer chose a crisp brilliant white finish, which, combined with the dark grey composite decking step that matches the doors and windows, creates a striking look.

The annexe has a crisp rendered finish
Silicon K-Render  on the three visible sides

Only the three visible sides of the annexe have been finished in the render. The rear elevation has been clad in cement particle board, which is both durable and dimensionally stable. These boards are painted in the same RAL colour as the doors, windows, and roof trims, creating a cohesive and stylish finish that ties the whole structure together.

Inside

New-build style finishes

The en-suite garden annexe has a spacious feel, with room for a bed, storage, and seating areas. The building sits on a footprint of 6.4 metres by 3.4 metres, creating a main room measuring 4.78 metres by 3.08 metres, and a shower room measuring 1.2 metres by 3.4 metres.

Plan of the garden bedroom
The plan: a main room of 4.78m x 3.08m, with the shower room along one end.

The shower room is well-equipped, featuring a spacious 1200mm x 900mm shower tray with a curtain. An extractor fan has been fitted, in line with Building Regulations for shower rooms. The room is fully tiled, with easy-to-maintain flooring and a modern towel rail.

A 1200mm x 900mm shower has been created
The shower  1200mm x 900mm
The en-suite has all mod cons
The en-suite

Inside the bedroom, the finish feels akin to that of a new-build home. A durable oak-effect laminate floor has been installed, while the walls and ceiling have been fully plastered and decorated. The annexe is wired to Part P regulations, with 8 LED downlights in the ceiling and 6 double power sockets, all finished with brushed steel fittings. Externally, three LED downlights have been fitted in the roof overhang along the front of the building.

The main room has a spacious feel
The main room
French doors lead onto the garden
French doors  onto the garden
Planning something similar?

Learn more about Annexe Spaces

To learn more about creating an en-suite garden bedroom, get in touch with the Annexe Spaces team on 0845 387 9 387 or via email at info@annexespaces.co.uk. Visit www.annexespaces.co.uk to explore the options available for customising your building.

Visit Annexe Spaces More Annexe Spaces projects
More projects like this Open-plan annexes Annexes under 25 sqm
Read the guides Garden annexes: the complete guide What an annexe costs The Caravan Act route Granny pods

Published 9 December 2017 · Photographs courtesy of Annexe Spaces.

Visit the Garden Spaces website
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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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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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