EZ Deck Co. homeowner guide
What Drives Composite Deck Cost in the Chicago Suburbs?
The scope and site factors that shape a project—without false fixed-price promises.
The short answer
Composite deck cost is driven by the complete scope: size, height, demolition, framing, stairs, railing, access, features, permits and the selected product level. Square footage alone cannot price the project accurately.
The largest cost drivers
A simple ground-level rectangle and an elevated deck with multiple stairs, premium railing and lighting are different construction projects even at similar square footage.
- Deck size, shape and elevation
- New construction versus tear-off or resurfacing
- Footings, beams, framing and house connection
- Number and configuration of stairs
- Railing system, gates and handrails
- Decking product level, fascia and picture framing
- Lighting, pergolas, roofs and screened features
- Access, disposal, permit drawings and municipal review
Why price per square foot can mislead
Stairs, railings and mobilization do not increase in a straight line with deck area. A smaller elevated deck can cost more per square foot than a larger simple deck. Use square-foot figures only as rough context, never as a substitute for a defined scope.
What a useful proposal should explain
A professional proposal should make the major assumptions visible so competing bids can be compared fairly.
- What is being removed and disposed of
- What structural work is included
- Exact decking and railing product levels
- Stair, fascia, lighting and finish details
- Permit responsibility and known exclusions
- Payment schedule and change-order process
How to control the investment
The best savings usually come from simplifying geometry, stair configuration and feature scope—not from hiding structural work or retaining an unsuitable frame. Establish priorities early and price alternates deliberately.
Common questions
What does a 12-by-16 composite deck cost?
The dimensions are not enough to answer responsibly. Height, stairs, railing, demolition, framing, access and material level can change the result materially.
Is resurfacing always cheaper?
Only when the existing structure is sound, compatible and worth retaining.
Do permits affect deck cost?
Yes. Fees, drawings, engineering needs and municipal requirements vary by property and scope.