decking over sloped ground

Perhaps the legislation was carelessly drafted, or perhaps the intention was there all along to impose stricter controls over all decks, including those over sloping land. Either way, you do require planning permission if ANY part of the deck is 30cm or more above existing garden height the fact that you're 

The initial phase of building a deck over a slope or on un-level ground includes stringing lines at the perimeter and installing the concrete footings or piers for posts that support the deck girders. Before installing the posts, it's necessary to cut each one to a specific length so the girders will be level. The depth and spacing of 

Homeowners with a concrete surface outside their home already have a sturdy foundation for garden decking, but concrete, unlike soil, cannot easily be adjusted to create a level surface. Constructing the deck's frame first and then using the frame as a guide is the simplest way to lay garden decking on 

This article will show you how to build a sturdy deck using common tools with minimal cuts and expense. Follow How to Build Your Own Elevated Deck on Uneven Ground - DIY - Small Budget, Minimal Cuts Instead of removing those concrete front steps, save some time by building a wood deck over and around them.