One of the most common questions homeowners ask is: “Can I build a garden annexe without planning permission?” The short answer is it depends on your situation, the type of annexe you want to build, and how it will be used.

At Hawksbeck Annexes, we specialise in designing and building stunning annexes with a full turnkey service, taking care of everything from design and planning to construction and interior finishes.

Permitted Development vs Planning Permission

In some cases, you may be able to build a garden annexe under Permitted Development rights, meaning you do not need to apply for planning permission. However, strict criteria must be met for this to apply:

The annexe must be considered an “incidental building” to your main house. This means it can’t be a completely self-contained residence with full living facilities if you’re claiming Permitted Development rights.

It must not exceed 2.5m in height if built within 2m of a boundary, and the total footprint and placement must adhere to outbuilding regulations.

The annexe should not be used as a separate dwelling. For example, a garden office with a kitchenette or a gym room is incidental, whereas a fully self-contained granny annexe often requires planning.

When Planning Permission is Required

If your annexe will be used as a full-time residence for a family member, or as a rental unit, planning permission is usually required. This is because it becomes an independent living space, and local councils treat this differently from a standard garden room.

Why Choose Hawksbeck Annexes

Our full turnkey service covers:

•  Free initial consultation and feasibility assessment
• Bespoke garden annexe design tailored to your needs
• Planning permission management or LDC applications
• Complete build, interior finishes, and utility connections

We build annexes for elderly relatives, adult children, home offices, and lifestyle spaces across the UK with superior quality, fast construction times, and transparent pricing.