What Is the Maximum Shed Size Without Planning Permission?

If you’re planning a new garden shed, one of the first questions you’ll ask is: “Do I need planning permission?” In most cases, the answer is no — as long as your shed meets specific size and location rules.

This guide explains exactly how big your shed can be without planning permission in the UK, including height limits, placement rules, and common mistakes to avoid.

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Large apex shed within permitted development limits

When You DON’T Need Planning Permission

In England, most sheds fall under permitted development if they meet specific size and placement rules.

The shed must be for incidental use (storage, hobby, workshop)
It must not be in front of the main house elevation
No more than 50% of the garden may be covered by buildings
It must not be used as a separate dwelling

Most garden sheds from our Small Shed and Medium Shed ranges comply automatically.

Maximum Shed Height Rules (UK)

Location	Maximum Height Allowed
Within 2m of a boundary	2.5 metres (flat or pitched)
Over 2m from boundary (pitched roof)	4 metres
Over 2m from boundary (flat/pent roof)	3 metres

These limits apply to garden buildings such as sheds, workshops, and summerhouses.

Pent roof garden shed suitable for boundary placement

When You DO Need Planning Permission

You will usually need planning permission if:

Your shed exceeds permitted height limits
The building is forward of the main house
The property is listed or in a conservation area
The shed will be used as living accommodation
The structure covers more than 50% of your garden

In these cases, consult your local authority or review the official guidance: Planning Portal – Outbuildings

Compact garden shed suitable for small gardens

Choosing the Right Shed for Your Garden

If you want to stay within permitted development rules, these options work best:

Small Sheds – ideal for compact gardens
Medium Sheds – balance of space and compliance
Pressure Treated Sheds – long-lasting with less maintenance

Need help choosing? Use Our Shed Builder

Quick Summary

Most sheds do not need planning permission
Height and location are the key restrictions
Check local rules if you live in a conservation area
When in doubt, choose a smaller or lower-profile shed

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