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Question DetailsAsked on 12/25/2013

how much is the per square foot cost of composite deck in northern VA

500 sq. ft. with composite decking, composite rail, 16 steps staris, wooden stained posts with vinyl facia

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2 Answers


There is a wide range of prices on composite decking from the product made for just the Big Box stores to the better quality ones many local lumber yards sell. The materials can range from $6.50 to $8.50 per s/f and the labor around $1.50 per s/f depending on the deck. The more cuts and such may push up the price.


Answered 6 years ago by ContractorDon


I was going to give basically the same price range as Don - my experience is it tends toward the $10 range generally for a routine composite deck. My impression, from your desire for 16 steps and vinyl fascia is you are going to be a bit more - probably about $10-13/SF, assuming you are talking 16 steps in one stairway which makes it about 10 feet high, so your posts are going to have to be a bit larger or closer together than usual (generally cheaper to go with larger posts like 6x6 instead of 4x4 if it turns out 4x4 is too light for your height rather than mmore 4x4's, as you do not need more foundation holes. Also, 4x4's, if actaully about 10' off the ground, will require some pretty unsightly cross-bracing to provide adequate lateral stability and to damp out "quivering" when people are using the deck. Also, the $10 range deck would be with pretty simple railing - basically plain-jane, just to code - any fanciness would increase your price.

With that high a deck, to provide strength and minimize sway, I would recommend in-ground piers (preferably concrete-encased ground-contact treated wood posts embedded in concrete almost full depth or full moment capacity embedded brackets rather than the common light-duty, one-dimensional resistance central pin type pier to post connectors) to stiffen it up, and if properly designed with moment connections to the beams, can totally eliminate lateral bracing (in most jurisdictions), leaving the underside of the deck wide open for storage bins, recreational item storage, extra parking, or whatever.

Answered 6 years ago by LCD

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