Deck Cost in Brookfield, WI: Cedar, Pressure-Treated and Composite Prices
A typical new deck costs $9,000 to $20,000, about $14,000 on average, according to NerdWallet's 2026 guide. In Brookfield, where many homeowners are pricing cedar, the material decides how long the deck lasts and how much upkeep it needs: This Old House says cedar is naturally resistant to rot and insects and can last over 20 years with proper maintenance, but costs a little more up front and has to be sealed to keep from graying, while pressure-treated wood lasts around 15 years and many composites carry warranties of around two decades. If your existing deck frame is sound, replacing only the boards can cost far less than a new deck.
Published 2026-10-28 · 6 min read · 1,370 words
Deck project - T&JHere is how cedar, pressure-treated and composite compare for a Brookfield deck, when re-decking makes sense, and how permits work in the City and the Town of Brookfield.
Brookfield Deck Costs at a Glance
| Item | Figure |
|---|---|
| Typical new deck, total | $9,000 to $20,000; national average about $14,000 |
| Pressure-treated decking | Lasts around 15 years; water repellent every two years |
| Cedar decking | A little more expensive up front; lasts over 20 years with proper maintenance; seal to prevent graying |
| Composite decking | Warranties of around two decades on many products; fading, scratches and stains usually not covered |
| Re-decking an existing frame with synthetic boards | About $23.50 to $28.75 per sq ft installed (May 2026) |
| Footings for an attached deck | Below the frost line and at least 48 inches deep |
This Old House puts the life of a pressure-treated deck at around 15 years and a well-maintained cedar deck at over 20 years, which is why the cheaper board up front is not always the cheaper deck over time.
Cedar, Pressure-Treated or Composite for a Brookfield Deck
Cedar. The choice most Brookfield searches ask about. Cedar is naturally resistant to rot and insects, so it does not need heavy chemical treatment, and heartwood is far more durable than sapwood, so ask which you are getting. It needs sealing to keep its color; left alone it weathers to gray.
Pressure-treated wood. The budget option. It lasts around 15 years but tends to crack, split and warp as it dries, and This Old House recommends a water repellent every two years.
Deck - T&JWant this priced for your deck?
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Composite. Very durable and easy to care for, with no painting and simple washing; many products carry warranties of around two decades, though fading, scratches and stains are usually not covered.
A Wisconsin winter is hard on any deck: snow sits on the boards, ice melt lands on the stairs, and freeze-thaw cycles work at every fastener. For a closer look at upkeep in this climate, see our guide to composite vs wood decking in Wisconsin weather.
Repair, Re-Deck or Rebuild?
Many Brookfield decks are old enough that the boards are worn but the structure underneath still has years left. Three options:
Repair.
Replace a few damaged boards, tighten or replace loose railings, refinish the rest.
Re-deck.
Keep the frame and put new boards, and often new railings, on top. Homewyse's May 2026 estimate for installing synthetic decking on existing deck framing is about $23.50 to $28.75 per square foot; removing the old boards is extra.
Rebuild.
Needed when the posts, beams, joists or the connection to the house are failing, or when the deck does not meet today's code for footings, guards or stairs.
The deciding question is the frame. Soft or split joists, rusted hardware, posts sitting on shallow footings, or a ledger board pulling away from the house mean a rebuild, not a re-deck. Our deck replacement cost guide covers tearing out an old deck.
Composite boards often need closer joist spacing than the wood boards they replace. Re-decking an old frame with composite may mean adding joists, so check the board maker's spacing before you price it.
What a Complete Deck Quote Covers
- Footings below the frost line, at least 48 inches deep for a deck attached to the house.
- The attachment to the house, flashing and hardware. Wisconsin's deck code covers footings, loads, stairs, guards and decay protection, and its 2016 update added anchorage provisions.
- Framing, decking, railings and stairs.
- Permits and inspections.
- Removal and disposal of an old deck, if there is one.
- Lighting or outlets, if you want power on the deck.
Ask every bidder to list the same items so the totals compare. For statewide pricing per square foot, see our Wisconsin deck cost guide.
Deck Permits in Brookfield: City or Town?
Brookfield has two separate local governments, the City of Brookfield and the Town of Brookfield, each with its own building department, so start by confirming which one your address is in.
- Town of Brookfield. The town states plainly that a deck requires a building permit, because a deck must support occupancy loads and resist frost damage to both the deck and the house. Interior remodels and additions need one too.
- City of Brookfield. The city issues its own building permits; call its building inspection office before you finalize the design.
- Either way, a deck attached to the house has to meet Wisconsin's Uniform Dwelling Code for footings, frost depth, loads, stairs, guards and decay protection.
Deck - T&JOur guide to deck permits in Wisconsin covers the common requirements, such as plans, setbacks and inspections.
Planning a Spring Deck Over the Winter
Winter is the time to settle the design, the material and the permit so the build can start when the ground thaws:
Find your plat of survey
permit offices usually ask for one.
Decide repair, re-deck or rebuild
after the frame is checked.
Choose the material:
cedar, pressure-treated or composite.
Plan stairs, railings and lighting.
Get two or three itemized quotes
that list the same scope.
Getting a Deck Estimate in Brookfield
A free in-home estimate checks your existing deck's frame and footings, tells you honestly whether a re-deck will last, and prices cedar, pressure-treated and composite side by side, permit included, in writing.
T&J is a father-and-son team that has worked in Wisconsin since 1989. John is your single point of contact from the first call through the final walkthrough, Telli is on site running the work, and T&J gives a written 2-year warranty. Homeowners in Brookfield and across Waukesha County can see our Brookfield deck construction page, our deck construction services, or request a free in-home estimate.
Frequently asked questions
How much does a deck cost in Brookfield?
A typical new deck costs $9,000 to $20,000, with a national average of about $14,000. Size, height, material, railings and footings decide where yours lands.
Is cedar a good choice for a deck in Wisconsin?
Yes, with upkeep. Cedar is naturally resistant to rot and insects and can last over 20 years with proper maintenance, but it costs a little more up front and needs sealing to keep from graying.
How long does a pressure-treated deck last?
Around 15 years, according to This Old House, with a water repellent applied every two years.
How much does it cost to replace just the deck boards?
Homewyse estimates about $23.50 to $28.75 per square foot to install synthetic decking on existing deck framing, before removing the old boards.
Do I need a permit for a deck in Brookfield?
Yes. The Town of Brookfield requires a building permit for a deck, and the City of Brookfield issues its own permits; attached decks must meet Wisconsin's deck code either way.
How deep do deck footings need to be in Wisconsin?
For a deck attached to a house, below the frost line and at least 48 inches below the adjacent grade.
Should I re-deck or rebuild my deck?
Re-deck if the posts, beams, joists and house connection are sound. Rebuild if the frame is rotting, the footings are shallow, or the ledger is pulling away from the house.
Pricing is based on our own recent projects. Written by John (PM, 14 yrs) and reviewed by Telli, who has been remodeling in Wisconsin since 1989. Published 2026-10-28.
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