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Annexe project · Timeless Garden Rooms

A one-bedroom annexe in reclaimed barn boards by Timeless Garden Rooms

A 50sqm home for elderly relatives in a forgotten corner of the garden, pairing a modern form with reclaimed barn boards and Crittall-style glazing.


Published 27 September 2026 · 3 minute read · Written by The Garden Room & Annexe Guide

One-bedroom garden annexe by Timeless Garden Rooms, clad in stained reclaimed boards with green-blue framed windows
Timeless Garden Rooms  10m x 5m one-bedroom annexe, 50sqm

A tired timber shed stood in a forgotten corner of this garden, backed by an old brick and flint wall. The owners wanted to replace it with somewhere their elderly relatives could live independently, close to the family but in a home of their own.

This 10m x 5m one-bedroom annexe by Timeless Garden Rooms now fills the corner. The 50sqm plan holds a bedroom, a shower room and an open-plan living space with a kitchen.

The Timeless team worked with the clients throughout, and the materials were chosen together. The result would not be out of place at a boutique hotel.

At a glance

  • Size: 10m x 5m, 50sqm. A bedroom, a shower room, and an open-plan living space with a kitchen.
  • Built for: the owners’ elderly relatives, replacing a dilapidated shed in a forgotten corner of the garden.
  • Construction: a traditional timber frame, built with full planning permission and Building Regulations approval. New electricity and water supplies run more than 100m.
  • Finishes: reclaimed barn boards stained in Jacobean and Crittall-style aluminium glazing outside; oak floors, a copper-topped reclaimed kitchen unit and Farrow & Ball Charlotte’s Locks cupboards inside.
  • Company: Timeless Garden Rooms, as a turnkey service. The project cost was in the region of £150,000.

Part of our one-bedroom annexe guide →

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The site

Replacing the shed by the garden wall

The old shed was a long, patched-together run of timber buildings with a felt roof, set against the brick and flint wall.

The old timber sheds against a brick wall, before Timeless Garden Rooms began work on the annexe
Before: the old shed
The old shed beside an ivy-covered brick and flint wall, before the Timeless Garden Rooms annexe
The forgotten corner

Once it was cleared, the annexe went onto a new concrete slab in the same position, edged in red brick to match the old wall behind. The annexe is built with a traditional timber frame.

New concrete slab edged in red brick along an old garden wall, laid by Timeless Garden Rooms
The new slab  edged in red brick to match the wall

A corner this far from the house had no services to connect to. Timeless Garden Rooms installed new electricity and water supplies over a run of more than 100m.

Outside

Reclaimed barn boards on a modern form

The building itself is a simple box form, which leaves the character to the materials and detailing.

The cladding is reclaimed barn boards, sourced by the Timeless team, then prepared and stained in Jacobean. The boards run horizontally in mixed widths, and their knots and marks add to their character. The stain gives them a warm brown that sits well against the brickwork.

Timeless Garden Rooms annexe in reclaimed boards, green-blue French doors and windows still in protective film
Reclaimed barn boards  stained in Jacobean, RAL 5001 frames

The windows and French doors are heritage aluminium, sprayed in RAL 5001, a green-blue, to replicate traditional Crittall steel windows. Slim frames and glazing bars divide each opening into small panes, as the steel originals did.

Inside

An open-plan living space and kitchen

Inside, the brief was a mix of rustic character and modern convenience, and the kitchen shows both. A reclaimed kitchen unit with a worn painted front serves as the counter, with a copper worktop and an inlaid copper sink. A Quooker tap supplies boiling water on demand.

Behind the counter, the fitted cupboards are painted in Farrow & Ball Charlotte’s Locks, a strong orange-red. They rise to the ceiling as open shelving, which gives the room a focal point seen from the other end.

Timeless Garden Rooms annexe living space with a reclaimed kitchen counter, orange-red shelving and oak floor
The kitchen  copper worktop, Charlotte’s Locks cupboards

Painted horizontal boarding lines the long wall, echoing the barn boards outside. Wide oak boards run across the floor, and a wall of full-height glazing looks out over the garden. Sockets, switches and light fittings come from Corston and Pooky, in brass.

Inside

Bedroom and shower room

The oak floor continues into the bedroom, where the same painted boarding forms the wall behind the bed. Glass pendants hang low on either side of the bed.

The shower room is fully tiled in the shower and on the floor. The blue and white patterned floor tile appears again in the shower storage niche, so the two areas read as one room. The walk-in shower has a glass screen and a Bluetooth electric shower. Opposite, a hand-made vanity unit in dark timber has reeded drawer fronts and brass taps, and a tall built-in cupboard holds the towels.

Bedroom in the Timeless Garden Rooms annexe, with a painted boarded wall, glass pendants and oak floor
The bedroom
Shower room by Timeless Garden Rooms with blue and white patterned tiles, a walk-in shower and a timber vanity
The shower room
The company

Materials sourced for the clients

Timeless Garden Rooms take the time to source materials and finishes that suit each client, rather than working from a fixed palette. On this annexe that included the barn boards and the kitchen unit. That makes them a great choice for clients with an eye for detailing and style.

Pairing a cubic, contemporary form with reclaimed and traditional finishes is what makes this annexe stand out among the garden annexes featured on the Guide.

The annexe went through full planning permission and Building Regulations approval, and the Timeless team handled both as part of their turnkey service. The project cost was in the region of £150,000.

One job remains: a reclaimed brick patio goes in next spring.

Timeless Garden Rooms annexe in stained reclaimed boards, with lawn, lavender and hydrangeas in front
Planning something similar?

Learn more about Timeless Garden Rooms

To talk to Timeless Garden Rooms about an annexe of your own, call 01843 821 851, email sales.timelessgardenrooms@gmail.com, or visit their annexe site at www.timelessgardenannexe.com.

Visit Timeless Garden Rooms More Timeless Garden Rooms projects
More projects like this Granny annexes One-bedroom annexes 45–55 sqm annexes
Read the guides Garden annexes: the complete guide What an annexe costs The Caravan Act route Granny pods

Published 27 September 2026 · Photographs courtesy of Timeless Garden Rooms.

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A self-contained annexe
in your garden
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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 annexe
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