A new wooden deck can be a very practical solution in situations where the underlying ground is not very useful and where more useful living space is required. The key benefits of a modern wooden deck that the deck is a solid flat surface that can be useful for passageway or for furniture, and more importantly the deck is self draining and therefore usable immediately after wet weather.
This is virtually never the case with underlying soil and grass, which are generally regarded as out of bounds until properly dried out after a rainfall. A good well built deck can immeasurably improve the appearance of the area and the usefulness, and is generally very easy to keep clean and tidy.
Often the deck does not need to be very high at all of the ground to the useful, and in some situations maybe only really a slightly raised platform. A sensible approach is to place weed mat under the deck so that no Grass Grows through. Such low decks can be placed over 100 by 50 mm rails treated to H4 and that are placed directly on the ground, although it is preferable to embed the rails in a small shallow concrete Trench., these decks can be very quick and easy to build and they do not require a council permit.
A deck can also be built over sloping ground, but in these cases it will be necessary to use posts concreted into the ground supporting the bearer and joists. The benefit of the deck or perhaps even walkway is that the sloping ground is now completely usable, and zero maintenance if the ground is covered in weed mat before the deck as laid.
All decks need to be built to withstand the likely maximum weight, and even if the deck is simply a low platform on the ground the decking timber chosen should be sufficiently robust, and the joist spacing should also be close enough to ensure that the deck will not move even in the slightest under any possible future weight