If you want to build a shed in your garden without dealing with planning permission, here is the short answer:
You can usually build a shed up to 2.5m high and up to 15m² in floor area without planning permission in the UK, as long as it meets permitted development rules. Always consult the planning portal for planning laws in your area.
This guide explains how big you can build a shed without planning permission, how high a garden shed can be, and when you should speak to your local council. You will also find links to suitable options on MCD Garden Buildings.
1. Understanding UK Planning Permission Rules
Most garden sheds fall under Permitted Development (PD). If your shed meets PD rules, you usually do not need to apply for planning permission.
These rules control:
- How big a shed you can build without planning permission
- How high you can build a shed without planning permission
- Where you can place the shed in your garden
The goal is to stop outbuildings from being too large, too tall or too close to boundaries or roads.
2. Maximum Dimensions for Sheds Without Planning Permission (UK)
When people ask “what is the maximum size shed without planning permission UK?”, they are usually talking about floor area and total coverage.
Maximum Floor Area
- You can normally build a shed up to 15m² in floor area without planning permission.
- All outbuildings together (sheds, garages, garden rooms) should not cover more than 50% of the total area of your garden.
If you want ideas for sheds that sit well within these limits, start with our Garden Sheds
3. Height Restrictions for Garden Sheds
A common question is “how high can you build a shed without planning permission?” Height is where many people accidentally break the rules.
The Key Height Rule Near Boundaries
If your shed is within 2 metres of any boundary (fence, wall, hedge), the maximum height is 2.5m from ground level to the highest point of the roof.
So if you are wondering “how high can a garden shed be” or “how tall can I build a shed” close to a fence, the safest answer is: keep the overall height under 2.5m.
Height Limits Further From the Boundary
If the shed is more than 2m from the boundary, other height limits apply:
- Maximum eaves height: 2.5m
- Maximum overall height with a dual pitch roof: 4m
- Maximum overall height with a flat or single pitch roof: 3m
Most ready made sheds, including many on the MCD Garden Sheds page, are designed to work within these rules.
4. Considerations Beyond Size and Height
Even if your shed fits within the size and height limits, there are other reasons you might still need planning permission.
- Your home is a listed building.
- You live in a conservation area, National Park, Area of Outstanding Natural Beauty, or similar protected area.
- You want to use the shed as separate living accommodation (for example, a place for someone to sleep full time).
- You plan to add plumbing, a toilet, shower, or kitchen facilities.
- The shed is closer to a road than the main house in some situations.
If you plan to use your shed as a workshop, office or hobby room rather than just storage, it is worth looking at our Garden Offices
5. Exceptions and Local Variations in Shed Regulations
Standard permitted development rules do not apply everywhere in the same way. Some areas have tighter controls, especially on how big a shed can be without planning permission.
You should be extra careful if you live in:
- A conservation area
- A National Park
- An Area of Outstanding Natural Beauty (AONB)
- The Broads
- A World Heritage Site
In these areas, local rules can remove or restrict permitted development rights. Always check your local council planning guidance if you are unsure.
6. Steps to Building Your Shed Legally
Here is a simple step by step process to follow.
1. Measure Your Garden
Work out the total area of your garden (excluding the house). Make sure all outbuildings combined will not cover more than 50% of that space.
2. Decide Where the Shed Will Go
Measure the distance from the shed site to each boundary. If it will sit within 2m of a boundary, you must keep the overall height to 2.5m or less.
3. Choose a Shed That Fits the Rules
Pick a design that meets both size and height limits. If you are asking “how big a shed can I build in my garden” or “how big can I build a shed without planning permission”, the safest choice is usually a compact, low profile design.
You can browse suitable options here: Garden Sheds at MCD Garden Buildings .
4. Check Local Planning Guidance
Visit your local council website or the Planning Portal for your area. Check if there are any extra restrictions where you live, especially if your property is listed or in a protected area.
5. Keep the Use Incidental to the House
Your shed should be used for storage, hobbies, a workshop, home gym, or home office. Once you want to use it as a separate home, granny annexe or regular sleeping space, you will likely need planning permission and building regulations approval.
7. When to Seek Professional Advice
You should get advice from your local planning department or a professional if:
- Your shed will be larger than 15m².
- You want a shed taller than 2.5m within 2m of a boundary.
- You plan to run a business from the shed.
- You plan to add a bathroom, kitchen, or complex electrics and plumbing.
- You live in a conservation area or your home is listed.
8. Encouraging Responsible Shed Building Practices
Even when you stay within permitted development rules, it is worth being a good neighbour and thinking about long term use.
- Keep a sensible distance from boundaries where possible.
- Avoid blocking your neighbour’s windows or main light.
- Plan roof drainage so rainwater runs away safely.
- Choose quality materials that will last and look tidy.
- Maintain the shed to prevent rot, leaks and damage.
FAQ: Common Questions About Shed Size and Planning Permission
How big can a shed be without planning permission in the UK?
In most cases, you can build a shed up to 15m² in floor area, as long as all outbuildings together do not cover more than 50% of your garden and other permitted development rules are met.
How big can I build a shed without planning permission?
Think about both floor area and height. Staying under 15m² and 2.5m high near boundaries will keep most people within the rules. For larger sheds, it is best to check with your local council.
How high can you build a shed without planning permission?
If the shed is within 2m of a boundary, the maximum allowed height is 2.5m. Further away from the boundary, the maximum height can be up to 4m with a dual pitch roof, or 3m with a flat or single pitch roof.
Final Summary: How Big Can You Build a Shed Without Planning Permission in the UK?
- Maximum typical size without planning permission: around 15m² floor area.
- If within 2m of a boundary, the shed should be no higher than 2.5m.
- All outbuildings together should not cover more than 50% of your garden.
- Use must be incidental to the main house (storage, hobbies, workshop, office).
- Extra rules may apply in conservation areas, national parks and for listed buildings.
If you are ready to choose a shed that fits within these rules, start here at MCD.
