Deck builders in Streamwood, IL

Homes in Streamwood have a median construction year of 1981, so a deck original to a typical house would now be about 45 years old — beyond the point where wood framing, fasteners and flashing can be assumed sound.

Many decks from the 1970s and 1980s were built before today's detailed deck provisions appeared in model codes. Common issues on decks of this age include corroded hangers, posts set directly in soil and ledger boards fastened with nails. Replacement is often the better value than repeated repairs.

That makes Streamwood's housing 20 years newer than Cook County as a whole, where the median home was built in 1961. Statewide, the median Illinois home was built in 1971. Among the 102 covered Illinois communities with Census data, Streamwood ranks #75 for oldest housing. In this ZIP code, 11% of homes were built before 1960, 37% between 1960 and 1979, 38% between 1980 and 1999, and 14% since 2000 — the single largest group dates to the 1980s.

The nearest NOAA climate station with 1991–2020 normals is Streamwood. It records an average of 153 days a year with a low at or below 32°F — a long, hard freezing season. On roughly 111 of those days the temperature climbs back above freezing, so water in wood, soil and gaps between boards repeatedly freezes and thaws.

For Streamwood, that means footings must bear below the locally required frost depth to avoid heaving, and wood surfaces should be kept sealed so absorbed water doesn't split boards over winter. Synthetic decking tolerates freeze-thaw well but still needs the manufacturer's expansion gaps.

Average snowfall near Streamwood is about 34 inches a year (Streamwood). That's enough that shoveling and ice-melt choices affect deck surfaces, and stair treads benefit from good texture and drainage.

Precipitation averages about 38 inches a year, falling on about 71 days with 0.1 inch or more — wet enough that drainage and flashing still matter, but dry spells also let wood surfaces dry out and check in the sun.

Average summer highs reach about 85°F, and around 28 days a year top 90°F. On a deck with full afternoon sun, dark composite can get uncomfortable on those days, so test samples in the sun before choosing a color.

Other Streamwood factors: many elevated townhouse decks are hard to reach for re-staining. Budget, upkeep tolerance and sun exposure on your particular lot still decide the final choice between these options.

Streamwood has about 13,402 housing units across its covered ZIP code. 67% are single-family detached homes, 23% are attached homes such as townhouses and rowhouses, and about 10% are in buildings with two or more units. Roughly 89% of occupied homes are owner-occupied.

With a large share of townhouses, many decks in Streamwood are elevated rear decks over a walk-out level, built close to neighbors. Privacy screens, setbacks, guard height and HOA design approval tend to drive these projects, and repairs to shared structures may require coordinating with an association.

• Replacement and major repair: about 7,636 homes (57%) were built between 1970 and 1999, the age group whose original or early add-on decks are most likely to have worn-out framing, connectors and boards.
• Retrofit decks on older homes: about 3,940 homes (29%) predate 1970. Here the priority is confirming that add-on decks are properly attached — or rebuilding them freestanding — before any cosmetic work.
• Upgrades and expansions: about 205 homes (2%) were built since 2010. Their decks are usually sound but small or builder-grade, so enlarging the deck, adding stairs and switching to composite or upgraded railings are common.

With about 153 freezing days a year, the building window in Streamwood is compressed. Design, drawings and permits are usually handled in winter so footings can go in as soon as the ground allows in spring, and finishes like stain are applied before nights turn cold in fall.

For Streamwood, IL, ask the permit office whether your deck needs a permit based on its size, height and attachment to the house, which drawings and inspections are required, and whether your townhouse association must approve the design first. Statewide code background for Illinois is on our state page; local rules change, so the building department remains the authority.

The closest covered area is Hoffman Estates, about 2.9 miles from the center of Streamwood's covered ZIPs. Its median home was built in 1976, 5 years earlier than in Streamwood. Streamwood has 7 percentage points more detached single-family homes (67% vs. 60%), which changes how many projects are backyard decks versus compact townhouse decks. Owner-occupancy is 89% in Streamwood compared with 74% in Hoffman Estates. Streamwood's covered ZIP code span about 7.7 square miles of land with roughly 13,402 homes — about 1,741 per square mile, a typical suburban density where most homes have usable backyards.