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How much does a deck cost to build in NJ?

Deck Cost: 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. Foundation and Frame are always wood and concrete. The costs between the different rail and decking choices as well as additional trim options will usually serve as the overall deciding factor. While wood comes in at a much lower price it requires yearly maintenance. Composite materials are more expensive up front but have a much longer lifespan and are maintenance free.

For the purpose of this post we will consider the costs and requirements for the construction of a wooden deck measuring 16’x20′. Keep in mind this information is for NJ residence on the East Coast only. Prices for labor and materials vary from place to place.

The cost for a new deck with wood rails and decking averages at $9,600 or $30 per square foot. Remarkably, the project has an impressive resale value, and a homeowner can reasonably expect to recoup around 80% of the total construction costs for such a deck at the time of sale.

This is considering the deck has a single set of stairs and is approximately 3 steps high. Stairs are more expensive to build than the deck itself so higher decks or decks with more than one set of steps are more money.

Cost breakdown

This is not a DIY project. The average homeowner is not going to have the advanced knowledge of carpentry that is demanded by such a project. You also need knowledge of local building codes and construction practices.

The costs for the project will include:

  • Materials – the deck described would require pressure treated framing lumber, pressure treated decking and railings. Decking installed in a basic linear array with appropriate galvanized screws (usually around 15 pounds) or clips which give the deck a screwless look to complete construction.
  • Excavation and site preparation – costs will vary according to the level of work necessary, but all projects will require leveling and the insertion of form tubes for the concrete footings.
  • Concrete – the 6×6 posts used as the framing for the structure must be set on top concrete footings.
  • Stairs and RailingsĀ  – in NJ it is illegal for any contractor to construct a deck without also ensuring that a set of stairs and safety railings were in place unless the deck is ground level.
  • Trim – On a wood deck typically the frame and stairs are kept as exposed wood.
  • Deck Skirt – The bottom space or skirt of the deck is left open. You can close it off with lattice or make it solid if you like at additional cost. The price for this will depend on the height of the deck and material used but generally is not that expensive. Maybe an extra $1500 for a deck this size for solid skirt, $600 for lattice.

Enhancement and improvement costs

  • Stain or seal – even if the decking is pressure treated it may be a good idea to seal or stain it against the weather. This is especially true in NJ where summer temperatures can be high and winter weather includes a lot of precipitation and freezing temperatures.
  • Electrical service – most decks should have at least a single electrical outlet appropriate for outdoor use. This will allow the homeowner to have access to such service without running extension cords into the home or the basement. Generally this is already on the exterior of the home but can be added if need be.
  • A pergola or awning – uncovered decks can become unpleasant during the worst of the hut summer. A pergola or awning can be added to the deck at additional cost.

NJ Wood Deck Cost Summary

Deck Cost - how much does a deck cost to build NJ

What does a deck cost in NJ? Approximately $30 a sq. ft. will buy you a deck built from wood with concrete footings, wood decking and wood rails with a single set of steps. The deck will be built to all local codes and pass all applicable inspections. Pretty basic but affordable. This example pic cost approximately $12,000 to build at 16×20 including the optional lattice and some deck lighting. Pavers cost an additional $4000.

NJ Composite Trex Deck Cost

On average synthetic decks run about $5 more per sq ft for both decking and rails than pressure treated decks. So the same deck shown above with trex decking would be $35 a sq ft or $11,200. $40 a sq ft with trex decking and composite rails or $12,800. But again keep in mind that for decks with long flights of steps or multiple sets the cost per square foot will be higher.

You could also add Azek trim to cover all the pressure treated lumber. This is called Fascia. Azek fascia is figured in linear feet not square feet. Add an average of another $5 per sq. ft for the option. Bringing this deck to $45 per sq ft or $14,400.

If this deck was a 2nd story deck you could add an under deck or dry deck product. This is basically a gutter system that covers the under side of the deck keeping it dry when it rains. This adds an average of about $12 per sq ft to the deck.

As you make your decision keep in mind the cost of yearly maintenance for a pressure treated wood deck.

Keep in mind these numbers are just estimates. Actual costs will vary some because every deck is different, but the prices we charge are always very close to these. Below is an example of a fully finished deck with composite deck and railings, Azek fascia, lighting, and under decking.

deck cost - What does a deck cost to build NJ

What does a deck cost in NJ with all the options? This deck with Trex decking and railings, Azek fascia, lighting, under decking, custom built Azek columns and Pergola cost around $65,000 not including the patio. All in was about $100,000 including the custom outdoor fireplace.

Additional Costs to build a Deck in NJ

Some additional costs you’ll have to pay are zoning and building fees for permits. You’ll also need a set of plans. A homeowner can draw they’re own plans and we can help, but a builder can’t draw plans for a homeowner. If you don’t want to draw them up we have an architect that can do it for you. I Can’t say exactly how much that is but I’d figure at least $1000 for something very basic.

New Deck Shape

All these prices assume the deck your building is square. If you want a deck with multiple levels, cut outs or some complicated shape or round, it’ll be custom pricing. Round is by far the most expensive. We’ve done round decks in the past that started at $100 a sq. ft. Multi level would be the next highest followed by a custom designed single level deck.

Additional Deck Option Costs

Deck options are all priced separately as per the customers design. There’s really no way of giving you a good idea of what they cost but I’d budget in a couple grand for an average size deck for things like:

  • Benches
  • Planters
  • Lighting or additional outlets
  • Gas line to a grill
  • Access door or stair gate
  • Stair Landing
  • Fancy decking pattern or border
  • Ramp

Hope this information helps you better understand the costs involved in building a deck at the Jersey Shore.