How Much Does It Cost to Build a Deck?

Pressure-treated vs composite vs hardwood: what each costs installed

When you look at a deck quote, the decking material itself is the single biggest variable. According to data from Angi and HomeAdvisor, the national average cost to build a deck ranges from $4,340 to $12,653, with most homeowners spending around $8,318 Angi, HomeAdvisor. However, your choice of material dictates where you will fall in that range.

Here is how the most common decking materials compare on an installed basis per square foot (including the joist-support framing and labor):

• Pressure-Treated Pine: $25 to $50 per square foot HomeGuide. This is the most budget-friendly option. The raw planks cost just $2 to $5 per square foot Angi. While highly accessible, it requires annual staining or sealing to prevent warping and splinters.
• Composite (e.g., Trex): $40 to $80 per square foot installed HomeGuide (some premium composite projects can exceed $100 per square foot HomeGuide). Composite boards cost $12 to $22 per square foot for materials alone HomeAdvisor. They are low-maintenance and resist rot, but they carry a higher upfront cost.
• Ipe Wood: $50 to $70 per square foot installed HomeGuide (some sources report up to $80 per square foot HomeAdvisor). This dense Brazilian hardwood is incredibly durable, lasting 50 to 75 years HomeGuide, but it requires specialized tools and pre-drilling, which drives up labor costs.
• Cedar: $30 to $47 per square foot installed HomeGuide. Cedar naturally resists insects and moisture, but because it is a softer wood, it scratches easily and requires regular maintenance.

Cost by deck size

Because deck building is largely priced by the square foot, size is a direct multiplier of your total cost. Below is a planning aid showing estimated price ranges for common deck dimensions using standard pressure-treated pine versus composite materials:

Note: Estimates are based on standard ground-level or first-story attached builds. Multi-level or second-story designs will require additional structural support and labor.

What drives the price

To understand a contractor's bid, you must look past the bottom line. A professional quote is built on four pillars: labor, materials, access, and disposal.

1. Labor

Labor typically accounts for 50% to 70% of a deck building budget Angi. Standard professional labor rates run between $15 and $35 per square foot HomeAdvisor. If you choose a hard-to-work-with material like Ipe or design a complex shape with curves and multiple levels, expect labor rates to sit at the higher end of that range.

2. Materials

This includes the surface decking boards, concrete for footings, framing lumber, joists, hangers, and fasteners. Framing alone adds about $9 to $12 per square foot in labor HomeAdvisor. If you are replacing an old deck but your existing wooden substructure is structurally sound, you might only need new surface boards, though labor and disposal fees can make this cost similar to installing a new deck HomeAdvisor.

3. Access

How easily can workers get to your yard? If your property has a steep slope, narrow gates, or obstacles that prevent machinery from transporting concrete and heavy lumber, contractors will charge more for the manual labor required to haul materials by hand.

4. Disposal

If you are replacing an old deck, do not assume demolition is free. Tearing down and hauling away an existing deck typically costs $5 to $15 per square foot HomeAdvisor. Always ask whether debris removal and local landfill fees are explicitly included in your written estimate. If you want to learn more about reading these details, check out our guide on how to read a contractor quote.

Railings and permits: the two lines people forget

Many homeowners calculate their budget using only the square footage of the deck floor, forgetting two essential expenses that can trigger unexpected change orders:

• Deck Railings: If your deck is elevated, building codes will require a railing. Railing costs range from $20 to $600 per linear foot installed HomeGuide. Basic wood or vinyl railings cost $20 to $60 per foot, while high-end glass or cable systems can run $100 to $600 per foot HomeGuide.
• Permits: Because decks are permanent structures, most municipalities require a building permit. These typically cost $225 to $500 HomeAdvisor. Ensure your contract specifies whether you or the builder is responsible for pulling the permit.

If you are planning other backyard improvements at the same time, you might also want to compare these costs with a fence installation cost to budget your entire outdoor perimeter effectively.

DIY vs. pro

Building a ground-level platform deck is a feasible DIY project for an experienced homeowner with the right tools. Doing so can save you the $15 to $35 per square foot labor fee HomeAdvisor.

However, if your design is elevated, attached to the house, or built on a slope, hiring a professional is highly recommended. Elevated decks require precise structural engineering, including concrete support footers dug below the frost line. Mistakes in foundation work or framing can compromise the deck's safety and longevity.

Quick answers

How much does a standard 12x12 deck cost?

A standard 12x12 deck (144 square feet) costs between $3,600 and $7,200 on average for pressure-treated wood, while a composite version typically ranges from $5,760 to $11,520 installed.

Does a floating deck cost less than an attached deck?

It depends. While a simple freestanding deck does not connect to your home, it needs additional framing materials and concrete footings for support, which can affect the final price.

How long do different decking materials last?

Pressure-treated wood typically lasts 10 to 15 years with regular maintenance, cedar lasts 15 to 20 years, composite materials last 25 to 50 years, and exotic hardwoods like Ipe can last 50 to 75 years.