Deck Building · Illinois
Deck Building in Illinois
Custom new decks planned around your home, yard and how you'll use the space for homes in Illinois, where the median home was built in 1975. Free referral to an independent contractor serving 123 covered ZIP codes.
Local guide
Deck Building in Illinois: what to know
Quick answer
Deck Building in Illinois is available through DeckBuildingServices.net, a free referral service that connects homeowners in 102 covered towns and 123 ZIP codes across Illinois with independent deck contractors. In our covered Illinois ZIP codes, the median home was built in 1975 and the area averages 121 freezing nights a year (NOAA).
Deck Building and local data in Illinois
Footing depth is the first local question. The Chicago Ohare Intl. AP weather station records about 121 nights a year at or below freezing for in our covered Illinois ZIP codes, so footings must reach the frost depth the building department sets, and about 42.3 inches of yearly snowfall feeds into beam and joist sizing.
59% of the 1,249,514 homes in our covered Illinois ZIP codes are detached houses and 10% are townhouses or other attached homes, which sets the mix between open backyard decks and compact elevated ones; with a median build year of 1975, most new decks bolt to a modern rim joist behind proper flashing.
About 17 days a year reach 90°F, so orientation, shade and board color are design decisions in our covered Illinois ZIP codes, not afterthoughts.
| County | Covered towns | Covered ZIPs |
|---|---|---|
| Cook County | 49 | 64 |
| DuPage County | 31 | 35 |
| Lake County | 13 | 13 |
| Will County | 5 | 6 |
| Kane County | 4 | 4 |
| McHenry County | 1 | 1 |
Who issues permits for deck building in Illinois?
Illinois building codes for single-family homes are largely adopted and enforced at the municipal and county level, so requirements differ between suburbs. Contact your village or city building department. New decks, replacements and structural repairs usually need a permit; staining and like-for-like board swaps often do not.
Who licenses deck contractors in Illinois?
Illinois has no single statewide license for deck builders; licensing and permits are mostly municipal. The state's Home Repair and Remodeling Act does protect homeowners: on jobs over $1,000 the contractor must give you the 'Home Repair: Know Your Consumer Rights' pamphlet before you sign.
When is the best time for deck building in Illinois?
Average lows near Illinois stay above freezing from April–November, which is the main building window. For staining and sealing wood, the best-balanced months are April, July and September–October.
The coldest month is January (average low 19°F) and the hottest is July (average high 85°F). May is typically the wettest month, with about 4.5 inches of precipitation — plan finish work around it. January brings the most snow on average (about 11.3 inches), so footings and framing are best finished well before then. Use the winter months to settle the design and apply for permits, so footings can go in as soon as the ground allows.
| Month | Avg high °F | Avg low °F | Precip (in) | Snow (in) |
|---|---|---|---|---|
| Jan | 32 | 19 | 2.0 | 11.3 |
| Feb | 36 | 22 | 2.0 | 10.7 |
| Mar | 47 | 31 | 2.5 | 5.5 |
| Apr | 59 | 40 | 3.8 | 1.3 |
| May | 71 | 51 | 4.5 | 0.0 |
| Jun | 80 | 61 | 4.1 | 0.0 |
| Jul | 85 | 66 | 3.7 | 0.0 |
| Aug | 83 | 65 | 4.3 | 0.0 |
| Sep | 76 | 57 | 3.2 | 0.0 |
| Oct | 63 | 45 | 3.4 | 0.2 |
| Nov | 48 | 34 | 2.4 | 1.8 |
| Dec | 37 | 24 | 2.1 | 7.6 |
Authoritative references
- Home Repair and Remodeling Act (Public Act 91-0230) — Illinois Attorney General
- Prescriptive Residential Wood Deck Construction Guide (DCA 6) — American Wood Council
- U.S. Climate Normals — NOAA National Centers for Environmental Information
How the work itself is done is covered in our deck building guide.
FAQs
Deck Building questions in Illinois
Who provides deck building in Illinois?
Independent deck contractors. DeckBuildingServices.net is a free referral service: you call, confirm your ZIP code and describe the project, and you are connected with a contractor serving Illinois who gives their own site visit, written scope and price.
Do I need a permit for deck building in Illinois?
Illinois building codes for single-family homes are largely adopted and enforced at the municipal and county level, so requirements differ between suburbs. Contact your village or city building department. New decks, replacements and structural repairs usually need a permit; staining and like-for-like board swaps often do not.
What affects the cost of deck building in Illinois?
deck size and shape — angles and curves add labor, height above grade and the amount of post, beam and bracing work and decking material and fastening system. Locally, footing depth for about 121 freezing nights a year adds to foundation work. Prices come from the contractor after a site visit.
What decking material works best in Illinois's climate?
Capped composite is a good starting point: about 78 freeze-thaw days a year are hard on unsealed wood and roughly 42.3 inches of snow a year means regular shoveling.
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Deck Building in Illinois towns
Illinois
Deck Building in Illinois
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