Understanding the Rules Before You Build

Planning permission is one of the most common concerns when adding a granny annexe.

As a general rule, if the building is going to be used as living accommodation where someone will sleep overnight, then yes, planning permission is usually required.

The type of application needed can vary. At The Green Room, we take care of this process for you, so there’s no added stress. Our team has years of experience working with planning officers and local councils across Northamptonshire and beyond.

Learn more about how we manage the process on our Installation Services page.

Different Routes: Planning Permission or Lawful Development Certificate?

In most cases, a granny annexe will need a householder planning application because it’s being used as living space. However, sometimes, especially if the annexe is classed as ancillary to the main home, a Lawful Development Certificate (LDC) may be used instead. This is often suitable when there are no separate utility connections or postal address.

We’ll help you choose the right route and submit the proper paperwork on your behalf.

Visit our FAQs page for more planning guidance.

What Affects the Need for Permission?

A few key points can influence whether planning permission is needed:

  • Will someone be sleeping in the building?
  • Is it a fully self-contained unit with its own kitchen or bathroom?
  • How close is it to the property boundary?
  • Is it for a family member or for rental use?

All of our granny annexes and garden lodges are designed to meet the correct regulations. We build each one with planning and compliance in mind.

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We Take Care of It for You

The planning process can feel complex, especially if it’s your first time dealing with it. That’s where we come in. We’ll guide you from the very beginning. From drawings and paperwork through to speaking with your local authority, we take care of it all.

We’ve helped hundreds of families through the process and understand exactly what councils look for. This means we can help avoid unnecessary delays and keep your project moving forward.

See our latest case studies to see how we’ve helped others.

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Get Help With Your Granny Annexe Planning

If you’re in Northamptonshire or the surrounding area, we’re here to help. Our team provides complete design, planning, and build services for granny annexes near you.

Book your free site survey or get in touch today to begin your project the easy way.

Planning Permission FAQs

Do I need planning permission for a granny annexe?

In most cases, yes. If someone is going to sleep in the building, you’ll need planning permission. We’ll take care of the whole process for you. From design to application, our team handles the paperwork and contacts the local authority on your behalf.

Is planning permission required for a garden lodge?

No, planning permission is not required, but a  Lawful Development Certificate is. We handle the LDC application for you as part of our service.

Who handles planning and building control?

We take care of it all. Whether it’s a full planning application or a Lawful Development Certificate, we deal with the local authority on your behalf.

Are there any local planning rules for granny annexes in Northamptonshire?

While the general rules for garden annexes are the same across the UK, each local authority may have slightly different preferences. We have experience dealing with councils across Northamptonshire and handle all planning or LDC applications on your behalf.

What is a garden lodge?

A garden lodge is a self-contained living space, often constructed under Caravan Act rules. It includes everything needed for independent living and is ideal for a family member or guest.

What is a Lawful Development Certificate?

A lawful development certificate (LDC) is a legal document from a local planning authority that confirms a development is lawful, meaning it doesn’t require planning permission. We can help you apply for this as part of your project. For further information, please visit the planning portal.

Do I have to pay council tax on a granny annexe?

If a dependent relative lives in the garden annexe, you are usually exempt from council tax. Rules can vary slightly depending on your local council, but we can help guide you.

Want to Avoid the Planning Permission Process?

If you’d prefer to avoid applying for full planning permission, a garden lodge may be the better route

Garden lodges are usually designed as ancillary accommodation and can often be installed with a Lawful Development Certificate instead. This means less paperwork and a faster route to completion, depending on your local authority.

Our garden lodges are built with the same care and quality as our larger annexes. They offer a fully insulated, self-contained space that can suit a wide range of needs. Whether you need extra living space, guest accommodation or a place for a younger relative, we’ll help you explore the best option based on your setup.

Find out more about our garden lodge options here.

Get in Touch with The Green Room

Our team of down-to-earth experts genuinely care about great garden spaces and excellent customer service. Whether you’re just starting to explore your options or ready to move forward with your project, we’re here to help.