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Maximizing Your Space: Understanding Permitted Development for Garden Rooms

Garden salon


The allure of a garden room as a versatile and functional extension to your living space is undeniable. Before embarking on the journey of creating your oasis, it's crucial to understand the regulations surrounding garden rooms under permitted development. In this blog, we will delve into the specifics of size limitations and guidelines, empowering you to make informed decisions while expanding your living space within the bounds of the law.

Permitted Development Overview:

Permitted development rights allow homeowners to make certain changes to their properties without the need for planning permission. These rights cover a range of alterations, including the construction of garden rooms, as long as specific criteria are met. These criteria often include limitations on size, height, and placement within the property.

Size Restrictions:

As of my last knowledge update in January 2022, permitted development rules in the UK state that a garden room or outbuilding must not exceed 50% of the total land around the original house. It's important to note that this calculation considers any existing outbuildings on the property, such as sheds or garages. Additionally, the maximum height for a garden room under permitted development is typically 2.5 meters, or 4 meters if the structure has a dual-pitched roof. The building must also be under 30m2

Distance from the Main Dwelling:

Permitted development guidelines often specify that a garden room must not be situated forward of the principal elevation or side elevation of the original house. The distance from the boundary may also be regulated, and structures are generally not allowed to be closer than 2 meters to the property boundary.

Design Considerations:

While there are size restrictions, permitted development regulations are often more lenient when it comes to the design and appearance of the garden room. This allows homeowners to exercise creativity and individuality in shaping the aesthetics of their space, provided it remains within the specified size and height limits.

Neighbourhood and Conservation Area Considerations:

It's important to be aware that if your property is located in a conservation area or a designated area of outstanding natural beauty, additional restrictions may apply. In these cases, it's advisable to consult with your local planning authority to ensure compliance with specific regulations unique to these areas.


Understanding the size limitations of a garden room under permitted development is crucial for a smooth and hassle-free construction process. By adhering to the guidelines regarding size, height, and placement, you can create a stunning and functional space that enhances your lifestyle while remaining in harmony with local planning regulations. Always check with your local planning authority or consult a professional to ensure that you are up to date with the latest regulations and to receive personalized advice based on your specific circumstances. With careful consideration and adherence to the rules, you can transform your garden into a haven that seamlessly integrates with your home.

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