Should You Build a Garden Room or a Garden Annexe? A Complete Guide

People often get confused between a garden annexe and a garden room, and while both may be slightly synonymous, they do vary in their design, function, and purpose. A garden is essentially an extension of your own space outside your house. You could typically use a garden room for a home office, gym, or hobby room. A garden annexe, on the other hand, offers greater independence and is ideally used for long-term residential purposes.

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At London Timber Buildings, we specialise in building premium, bespoke garden structures designed to elevate your outdoor living. In this guide, we will dive deep into understanding the fundamental difference between a garden room and a garden annexe.

What is a Garden Room?

A garden room is a versatile outdoor structure that enhances your lifestyle without disrupting your main home. It can be used year-round and has multiple use cases, such as:

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• Home offices 
• Gyms or yoga studios 
• Hobby room
• Entertainment room
• Teen hangouts or gaming dens 

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At London Timber Buildings, our Garden Rooms are custom-built with premium materials, integrated electrics, and bespoke layouts tailored to your purpose.

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What is a Garden Annexe?

A garden annexe is a self-contained living space for independent residential use. It is also known as a 'granny annexe' and includes:

• A private bedroom
• Bathroom facilities
• Kitchen/kitchenette
• Living area

Garden annexes are an ideal choice for growing families to keep their loved ones near them while offering greater independence. It can be used as a residential property for elderly parents, adult children, guests, or even as a rental opportunity.

Discover our range of Garden Annexes that are fully bespoke, insulated, and designed to meet residential building regulations.

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Key Differences Between Garden Rooms and Garden Annexes

Functionality

Garden Room: Suitable for leisure or work, not sleeping or living for an extended period.

Garden Annexe: Designed for full-time residential use.

Plumbing and Electrics

Garden rooms, in general, only need basic electrics.

Garden annexes require plumbing, drainage, hot water systems, and complete electrical installations.

Planning Permission

Garden Room: Planning permission is usually not required. It falls within Permitted Development.

Garden Annexe: This usually requires planning permission and needs to conform to Building Regulations.

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Design Considerations for Both

Size & Layout

We can help you design the perfect footprint for your outdoor space, taking into consideration access, privacy, and sunlight.

Materials & Insulation 

All of our builds use premium timber, top-tier insulation, double-glazing, and durable finishes.

Custom Features

From bi-fold doors, skylights, underfloor heating, and smart home integration, the options really are endless.

Discover our bespoke design services or get in touch to discuss your vision.

Why Choose London Timber Buildings?

We are a trusted UK specialist in bespoke timber garden structures, known for:

• Beautiful craftsmanship
• Bespoke designs
• Turnkey project management
• Transparent Quotes
• Planning and compliance support

Whether you're expanding for lifestyle or living, we deliver quality that lasts.

Garden Room or Garden Annexe?

If you need to add a functional, beautiful space without major red tape, then a garden room is your answer. But if you are after long-term independent living, a garden annexe is the smarter move.

Let's talk through your goals: Contact our expert team for a no-obligation consultation today.

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