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.
For instance, Remodeling Magazineâs Cost Value Report in 2013 states the average cost of a midrange deck addition project runs around $15,000 for a composite deck and $9,327 for wood. While This Old House averages a new deck to be just shy of $6,000. A new patio might cost the homeowner a third of that lower-end price.Additionally, according to this article from HouseLogic, a free source from the National Association of Realtorsâ¢, decks run around $33 per square foot while a patio might cost as low as $15 per square foot.In short, patios are usually cheaper than decks.dditionally, according to this article from HouseLogic, a free source from the National Association of Realtorsâ¢, decks run around $33 per square foot while a patio might cost as low as $15 per square foot. In short, patios are usually cheaper than decks.