Deck cost in Chicago, IL (2026)
Planning a deck in Chicago? Here is what decks typically cost, what is different about building one in Chicago, and how to get a price range for your own yard in about two minutes.
Short answer
Using typical national ranges from published 2026 cost guides (the same sample rates as our calculator), an installed deck runs about $28 to $55 per square foot in pressure-treated wood, $45 to $78 in composite, and $58 to $95 in PVC or premium composite, from ground level up to a walkout or second-story deck. Railing and stairs are extra.
These are not Chicago prices. We do not have Chicago price data and we do not make up a local average. A local builder sets the real price after seeing your yard, height, footings, access and permit needs.
Typical deck costs by size and height
These worked examples come from the same estimator as the deck cost calculator, using national sample rates:
| Deck | Height | Pressure-treated wood | Composite | PVC / premium composite |
|---|---|---|---|---|
| 12 x 16 ft (192 sq ft) | At ground level | $4,550 to $6,200 | $7,350 to $9,950 | $9,450 to $12,800 |
| 12 x 16 ft (192 sq ft) | A few steps up | $6,700 to $9,100 | $9,650 to $13,050 | $11,950 to $16,150 |
| 16 x 20 ft (320 sq ft) | Raised | $17,100 to $23,150 | $22,550 to $30,500 | $26,900 to $36,400 |
| 16 x 20 ft (320 sq ft) | Walkout or second story | $23,550 to $31,900 | $29,800 to $40,350 | $34,450 to $46,600 |
Examples assume one side against the house, black aluminum railing where railing is required, and stairs on the raised examples. Typical national ranges, not a quote.
Installed price per square foot (national sample rates)
| Height | Pressure-treated wood | Composite | PVC / premium composite |
|---|---|---|---|
| At ground level Under 2 ft · 0-2 steps | $28 | $45 | $58 |
| A few steps up About 2-4 ft off the ground | $34 | $52 | $66 |
| Raised About 4-6 ft off the ground | $42 | $62 | $78 |
| Walkout or second story About 6-12 ft, off an upper door | $55 | $78 | $95 |
What is different about building a deck in Chicago
- A building permit is always required to repair or replace structural parts of a porch or deck (columns, beams, foundations, stringers, joists), and the application needs plans prepared by an Illinois-licensed architect or structural engineer. (Chicago: Porch and Deck Safety)
- No permit is needed to repair or replace a residential porch less than 6 feet off the ground with no more than 50 square feet of landing, or to replace non-structural parts like deck boards, stair treads or pickets when there is no open violation. (Chicago: Porch and Deck Safety, Chicago permit guide: porch work)
- By ordinance, all parts of porches and decks must carry 100 pounds per square foot live load, and inspectors check joists, beams, columns, stairs, rails, ledger boards, connections and footings. (Chicago: Porch and Deck Safety)
- You may act as your own general contractor if the building is your primary residence, no more than three stories, with no more than six units. Otherwise a Chicago-licensed general contractor is required. (Chicago: Porch and Deck Safety) Permit applications for plan-based work go through a licensed architect, engineer or a City-licensed expediter. (Chicago: How to apply)
Permit office: City of Chicago Department of Buildings, call 3-1-1 for porch and deck questions. Rules change, so confirm with the office before you build. Facts checked October 27, 2026.
Climate and materials in Chicago
Chicago winters bring hard freezes, lake wind and snow, and spring and fall bring plenty of freeze-thaw cycles. Rot at post bases, rusted connectors and loose stairs are the usual trouble spots on older wood porches and decks. Composite or PVC boards cut down on refinishing, but the frame underneath still needs to be built to the city's load rules.
Lots, slopes and deck height
Many city homes, including two-flats and three-flats, have rear porches that serve more than one floor, and many lots are narrow. That pushes projects toward the taller height levels and toward stairs and landings, which raise the price more than square footage alone. Chicago suburbs have their own building departments and rules, so check with your village or city if you are outside Chicago.
When to plan
Because new and structural work needs licensed plans before the permit, add design time to the schedule. Lining up drawings in winter puts you in a better spot for a spring or summer build.
Draw your deck and see a price range
Find your home on the satellite map, tap the corners of your deck, pick the height and materials, and see typical ranges for wood, composite and PVC side by side. Free, no sign-up, no contact details, nothing saved.
Open the deck cost calculatorHow to use these numbers
- Use the range to set a budget before you call builders, not as a price to hold anyone to.
- Height is the biggest lever. Measure from the ground to the door threshold where the deck will attach.
- Ask each builder whether the quote includes the permit, footings, railing, stairs and removal of any old deck, so you compare like with like.
Deck builders in Chicago
QuoteDecking puts this estimator on your own website with your prices, and each homeowner's drawing and estimate come to you as a lead. Starter $49/mo, Pro $99/mo. 30-day free trial, no card needed.
Frequently asked questions
Do I need an architect for a deck in Chicago?
For new decks and structural repair or replacement, the permit application needs plans by an Illinois-licensed architect or structural engineer. Small low porches and non-structural repairs can be exempt.
Can I replace my deck boards without a permit in Chicago?
If there is no open violation, replacing non-structural parts like deck boards, stair treads or pickets does not need a permit.
Do these prices apply to Chicago?
They are typical national ranges, not Chicago prices. Licensed plans, multi-story porches and city inspections can push local costs up, so get local quotes.
Is this what a deck costs in Chicago?
The ranges are typical national ranges from published 2026 cost guides, not Chicago price data. A local builder sets the real price after seeing your yard.
Sources
- https://www.chicago.gov/city/en/depts/bldgs/supp_info/porch-safety.html
- https://www.chicago.gov/city/en/sites/guide-to-building-permits/home/help/faq/DOB/bldg-permit-not-required/worktype/porch.html
- https://www.chicago.gov/city/en/sites/guide-to-building-permits/home/apply.html
Prices are typical national ranges from published 2026 cost guides, not Chicago prices or a quote. Local permit facts are summarized from the official pages above. Deck cost in other cities.