Home Addition
in Oak Brook.
Home Addition in Oak Brook sees strong homeowner demand across the Chicago Metro.
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FreeHow Much Does Home Addition Cost in Oak Brook, IL?
Typical Range
$40,000 to $150,000
Typical Home Addition projects in Oak Brook run $40,000 to $150,000.
What Home Addition Returns in Oak Brook
Mid-range cost and resale value from the 2025 Remodeling Cost vs. Value report. Oak Brook is benchmarked using the East North Central regional average.
| Project | Cost | Resale Value | ROI |
|---|---|---|---|
| Deck Addition | Wood | $18,263 | $17,323 | 95% |
| Deck Addition | Composite | $25,096 | $22,199 | 89% |
| Bathroom Addition | Midrange | $60,645 | $32,347 | 53% |
| Bathroom Addition | Upscale | $111,255 | $40,526 | 36% |
| Primary Suite Addition | Midrange | $170,517 | $55,097 | 32% |
| Primary Suite Addition | Upscale | $351,613 | $63,136 | 18% |
Source: Remodeling Magazine 2025 Cost vs. Value. Mid-range tier.
Deck Addition ROI Trend
Regional ROI by year
| Year | ROI |
|---|---|
| 2020 | 72.1% |
| 2021 | 65.8% |
| 2022 | 64.8% |
| 2023 | 50.2% |
| 2024 | 82.9% |
| 2025 | 94.9% |
Source: Remodeling Cost vs Value data, 2020 to 2025.
Oak Brook Market
Screened Home Addition Pros in Oak Brook, IL
This is what we have checked in Oak Brook so far. Every contractor we found is shown here, not ranked.
No contractors found in this area yet. We are expanding coverage market by market.
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Nearby areas: Chicago
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Home Addition Cost Estimator: Get Your Budget in 2 Minutes
Home additions cost $150–$310 per square foot for finished living space, with second-story additions running 25–40% more. Use our estimator to get a realistic budget range before you meet with a general contractor.
Home Addition Permit Guide: What to Expect in KC, Chicago, St. Louis, and Other Midwest Cities
All home additions require permits for structural, electrical, plumbing, and HVAC work. Permit costs run 0.5–2% of project cost. Here's what gets inspected, how long approval takes, and what happens if you skip it.
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