The contractor bids your project for a specific price and that is how much it will cost...in theory. For small, simple projects, you can probably count on this contract to work for you and for your contractor.However, for larger and more complex projects, the final cost is likely to be higher.he contractor bids your project for a specific price and that is how much it will cost...in theory. For small, simple projects, you can probably count on this contract to work for you and for your contractor. However, for larger and more complex projects, the final cost is likely to be higher.
Decks are less expensive than most other home additions. And because decks are so popular, they also make homes more marketable and valuable. Here's a look at what they cost. For basic designs using the least expensive lumber, you can expect to pay from about $6 to $8 per square foot of deck area.Even if you choose top-of-the-line redwood lumber or want a hot tub, material costs are still reasonable, anywhere from $20 to $35 per square foot.ere's a look at what they cost. For basic designs using the least expensive lumber, you can expect to pay from about $6 to $8 per square foot of deck area. Even if you choose top-of-the-line redwood lumber or want a hot tub, material costs are still reasonable, anywhere from $20 to $35 per square foot.
Cost of Hiring a Contractor. Contractor prices vary widely depending on the type of wood you choose and the size and configuration of the deck. The average price to build a deck with pressure-treated pine is about $30 to $35 per square foot.That price includes the wood planks, supporting framework, railings and all labor costs.ontractor Cons. 1  More expensive-If youâre hiring a contractor to build the deck, plan on spending double. 2  Contractors have to make money, of course, so they charge labor and overhead fees. 3  Most of the time, those fees add up to about the same cost as the materials.