The average deck is constructed from three main features – the decking, the frame / foundation, and the railings. Decking and rails can be made from wood, composite materials or Metal. The foundation is always made of concrete and the frame out of treated wood. Costs vary quite a bit when comparing different rail and decking options which is why these factors will generally be the biggest drivers of cost.

Framing wood and concrete costs won’t vary much when comparing decks of equal size. So spend most of your time pricing out the finish materials. That’s where the big money generally gets spent.

Aside from the cost to build a deck you should also consider long term maintenance costs. While an all wood deck can be built for a much lower price than a composite one, it requires yearly maintenance. Composite decks are more expensive up front but have a much longer lifespan and are maintenance free.