Do I Need Planning Permission for a Garden Annexe?

A garden annexe can be a fantastic addition to your property, providing an independent yet connected space for family members. However, all garden annexes require planning permission and building control approval here in the UK. This is due to their status as being self-contained living accommodation, which is subject to specific regulations.

At London Timber Buildings, we work closely with specialists to streamline the planning process for your garden annexe. Here’s what you need to know before you get started.

What is a Garden Annexe?

A garden annexe is a self-contained living space within the grounds of your property, typically used as accommodation for family members. It often includes essential facilities like a bedroom, bathroom, kitchen, and living area. These structures are distinct from garden rooms or summerhouses as they are designed for permanent residence.

Do You Need Garden Annexe Planning Permission?

Due to an annexe being classified as a self-contained living space, planning permission is mandatory. Whether the annexe is used as a “granny flat” for a family member or additional accommodation, it must meet the legal criteria set out by local authorities.

At LTB, we partnered with one of the UK's only annexe and garden room planning and development consultancies. Their expertise spans all aspects of the planning process, ensuring the best chance of success for your application. Having worked with over 250 local planning authorities, they boast an impressive 93% success rate from more than 500 applications.

Building Control & Regulations for Annexes

In addition to planning permission, all garden annexes must comply with building regulations. These standards ensure:

• Safety: The annexe is structurally sound and safe for occupants.
• Energy Efficiency: Compliance with insulation and energy-saving measures.
• Health Standards: Proper drainage, ventilation, and fire safety provisions.

A building control surveyor will review your plans and construction materials before work begins. They’ll also conduct regular site inspections at key stages of the build to verify compliance. Meeting these standards ensures your annexe meets the same quality as a permanent home.

Our Planning Permission Service

At London Timber Buildings, we simplify the planning process by partnering with specialists who handle the entire application on your behalf. Our service includes:

1. Preparing and providing all necessary drawings.
2. Submitting your planning application to the local authority.

This service is available for £1,150 (excluding the local authority’s planning application fee, typically £322, including a Planning Portal surcharge).

Please Note:

• While we offer guidance on planning requirements, final confirmation must be obtained from your local authority.
• We do not require evidence of planning permission to complete your annexe build, but it is the homeowner’s responsibility to ensure compliance.

Why Choose London Timber Buildings?

We specialise in creating bespoke garden annexes that are both functional and beautiful. With our expert planning partner and years of timber construction experience, we deliver premium-quality structures tailored to your requirements.

Get in touch with the team at London Timber Buildings, your trusted supplier of bespoke garden annexes, log cabins and garden rooms and let us guide you through the planning and building process with confidence.

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