The cost of garden decking in the UK typically ranges from £80 to £220 per square metre fully fitted, depending on the material. Softwood is the cheapest option at £80 to £110 per m2, while hardwood ranges from £130 to £180 per m2. Composite decking is more expensive, with standard composite costing £120 to £160 per m2 and premium capped composite ranging from £160 to £220 per m2. A typical 20m2 medium-sized deck will cost between £2,000 and £4,400.

Composite decking has a higher upfront cost than softwood, but it is often considered worth the investment for many homeowners. Unlike wood, composite does not rot, splinter, or warp, and it requires zero annual maintenance—no sanding, staining, or sealing is needed. It also typically comes with a 25 to 30-year warranty. Over a 10-year period, the maintenance costs of a wooden deck (paints, stains, oils, and your time) can narrow the price gap significantly.

In most cases, you do not need planning permission for a garden deck under permitted development rights. However, you will need planning permission if the deck is raised more than 30 centimetres (about 12 inches) above ground level, or if it covers more than 50% of your total garden area (including any other outbuildings). If you live in a listed building or a conservation area, you should always check with your local council before starting work.

The lifespan of your deck depends heavily on the material and maintenance. A softwood deck (like pine or spruce) typically lasts 10 to 15 years, provided it is cleaned and re-stained annually. A hardwood deck (like oak or iroko) can last 20 to 30 years with proper care. Composite decking is the most durable, typically lasting 25 to 30 years or more with virtually no maintenance required, as it is resistant to rot, insects, and weathering.

Yes, installing decking yourself can save you roughly 40% to 50% on the total project cost, as labour is a significant expense. A ground-level, straightforward deck is a manageable DIY project for someone with basic carpentry skills and the right tools (saw, drill, spirit level). However, raised decks require precise structural calculations, proper concrete footings, and strict adherence to safety building regulations to prevent collapse.

Softwood (typically pressure-treated pine or spruce) is the cheapest decking material available in the UK. It is widely available, easy to cut and install, and ideal for ground-level decks on a budget. However, it is the least durable option and requires annual maintenance with preservatives and stains to prevent rot and splintering.

Yes, a well-designed and well-maintained deck can add value to your home. Estate agents often estimate that a high-quality garden deck can increase a property’s value by up to 5% to 10%, as it creates a highly desirable ‘outdoor room’ for entertaining. To maximise the return on investment, ensure the decking complements the style of your home and is kept in excellent condition.