Planning
Does garden decking need planning permission?
Many low domestic decks are permitted development, but height, coverage, listed status and local restrictions can change the position.
Low garden decks are often permitted development
Planning Portal guidance for England explains that decking and raised platforms can fall within permitted development when all relevant limits and conditions are met. The exact measurement is taken from the site, so sloping ground can make a seemingly low deck more complicated.
Do not rely on the height beside the back door alone. Check the highest point above the original ground across the complete platform.
Coverage and property restrictions matter
Decking, extensions and outbuildings can count together when considering how much of the original garden has been covered. A previous extension or garden building can therefore affect a new deck.
Listed buildings, planning conditions, Article 4 directions and some designated locations may remove or limit ordinary permitted-development rights.
Raised decks bring more design questions
As height increases, privacy, overlooking, steps and guarding become more important. The structural frame and balustrade should be designed together, and the relationship to neighbouring gardens considered early.
A change in garden level may also affect how height is measured. If the design is close to a limit, obtain advice before construction.
Confirm before ordering materials
Use the current Planning Portal guidance and ask the relevant local planning authority where the position is unclear. Keep any written response with the project documents.
Heritage can help develop a practical layout and installation specification, but planning confirmation remains the homeowner’s responsibility unless a different service is expressly agreed. This guide is general information, not planning advice.
Common questions
Questions this guide often raises.
01Does replacing an existing deck need permission?
02Does composite decking follow different planning rules?
03Who should I ask if the garden slopes?
Related installation services
Keep planning
Related practical guides.
Timber decking or composite decking: which suits your garden?
The visible board matters, but drainage, ventilation, subframe and edge details determine whether either deck performs well.
Read the guide
What affects the cost of decking installation?
Deck area alone does not define the price. A low platform on open ground is different from a raised deck with steps and finished edges.
Read the guide
How to plan decking around doors, drainage and garden levels
Good deck design starts with water and access. Finished board level should never be chosen before the surrounding thresholds are understood.
Read the guide