Annexe company · Timeless Garden Rooms

Personalised living annexe designs

No pre-set layouts — every annexe drawn from scratch, from an 85sqm two-bedroom home with two en-suite wings to a 40sqm room with a sleeping deck under the ridge.

Published 20 March 2023 · Updated 30 September 2026 · 5 minute read · Written by The Garden Room & Annexe Guide

Inside a Timeless Garden Rooms annexe designed as a teenagers den and guest bedroom — **Timeless Garden Rooms** drawn from scratch, not from a catalogue

Garden living annexes are a practical and stylish solution for modern family needs. Whether you’re bringing ageing parents to live closer, accommodating an adult child returning home, or simply creating extra space, a bespoke living annexe can be the perfect answer.

At a glance

The approach: no pre-set layouts. Every project is drawn from scratch around the family’s needs, in contemporary styling or something more traditional.
What you can personalise: wall panelling, Farrow & Ball finishes, and bespoke kitchens and bathrooms.
What they handle: Local Authority planning approval and Building Control sign-off, tree and biodiversity surveys where needed, then groundwork through to final decoration and the kitchen and bathroom fit.
The big one: an 85sqm L-shaped two-bedroom annexe for an elderly couple, one needing specialist long-term care, with two en-suite bedrooms in separate wings joined by an open-plan living space.
The small one: a 40sqm building doing three jobs — teenage retreat, family entertainment space and occasional guest room, with an offset ridge that keeps the front elevation low while making room for a mezzanine.
The construction: built to Building Regulations and certified by Building Control, with multi-layer insulation that meets or exceeds the thermal targets for new homes.

Part of our garden annexe guide →

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 approach

Tailor-made designs by Timeless Garden Rooms

Timeless Garden Rooms specialise in creating customised garden annexes designed around your family’s unique needs. Rather than offering pre-set layouts, their team crafts every project from scratch, ensuring the design, layout, and finishes are personal and functional.

While their portfolio includes sleek, contemporary designs, Timeless Garden Rooms also excel at delivering annexes with traditional, homely charm. You can personalise your annexe with options such as wall panelling, Farrow & Ball finishes, and bespoke kitchens and bathrooms configured to your preferences.

From expansive multiple-bedroom annexes to compact solutions for smaller gardens, Timeless Garden Rooms bring flexibility and expertise to each project, as seen in the examples below.

The service

A comprehensive turnkey service

Timeless Garden Rooms manage every stage of the process, from initial design to handing over the keys to your move-in ready home. Their service includes:

Handling Local Authority Planning Approval and Building Control sign-off.
Organising tree and biodiversity surveys, if needed.
Preparing installation method statements to protect the surrounding environment.

The team also manages every aspect of construction, from groundwork to final decoration, including the installation of kitchens and bathrooms. This seamless approach ensures you’re left with a fully finished home, ready to enjoy.

Inside a two bedroom living annexe by Timeless Garden Rooms — **Inside a two-bedroom annexe**

Case study

Case study 1: spacious two-bedroom garden home

This 85 sqm two-bedroom annexe showcases Timeless Garden Rooms’ commitment to creating homes that feel truly personal. Designed for an elderly couple, one requiring specialist long-term care, the annexe was built in their daughter’s garden.

Design Features:

Layout: An L-shaped design with rustic exterior styling. Two en-suite bedrooms are located in separate wings, connected by an open-plan living area.
Accessibility: Pocket doors were used for the en-suite bathrooms to maximise space and provide easy access.
Living Space: A large, well-equipped kitchen supports independent living, with designated dining and sitting zones.
Outdoor Integration: Each room has garden views, with doors opening onto a covered veranda. This not only provides a shaded seating area but also naturally regulates light and heat.
Modern Comforts: The annexe is fitted with an underfloor heating system controlled via an app.

Planning approval was straightforward, as the Local Authority recognised the annexe’s role in keeping the family together while avoiding residential care.

Floorplan of 2 bedroom annexe by Timeless Garden Rooms — The 85sqm plan — two en-suite bedrooms in separate wings, joined by the living space.

L-shaped 2 bedroom living annexe by Timeless Garden Rooms — **The L-shape**

Kitchen in a 2 bedroom Timeless Garden Rooms annexe — **The kitchen**

The main living area in a 2 bedroom living annexe — **The living area**

Each room leads out onto a covered veranda — **The veranda** every room opens onto it

Case study

Case study 2: multifunctional family space and guest room

This 40 sqm annexe demonstrates Timeless Garden Rooms’ versatility. Designed for a family seeking a multifunctional space, the building serves as a teenage retreat, family entertainment area, and occasional guest accommodation.

Design Highlights:

Design Innovation: To meet Local Authority requirements, an offset ridge created a shallower front elevation while allowing for a mezzanine level.
Space Optimisation: The mezzanine accommodates a double bed, offering a unique solution for teenagers and guests.
Interior Features: Rustic beams, faux wall panelling, and warm flooring create a charming aesthetic.
Technology: Hardwired internet provides seamless access to streaming services and lighting controls.

A stylish kitchen and a spacious shower room complete the design, ensuring comfort and functionality for every use.

40sqm living annexe by Timeless Garden Rooms — **The 40sqm annexe**

The roofline creates space for a sleeping deck above the bathroom — **The sleeping deck** made possible by the offset ridge

Shower room in a 40sqm Timeless Garden Rooms living annexe — **The shower room**

The annexe has a stylish kitchen area — **The kitchen area**

The main room has doors leading out onto the garden — **Doors to the garden**

The construction

Built to modern housing standards

Timeless Garden Rooms construct each living annexe to meet Building Regulations, with work certified by Building Control. Their multi-layer insulated construction meets or exceeds thermal performance targets for new homes.

A striking example of their insulation quality can be seen in a winter project photo. While snow in the surrounding garden melted, the snow on the annexe roof remained intact, proving its excellent thermal efficiency.