Looking for an addition contractor in Harvey, IL? Describe your project once and up to three addition contractors who work in Harvey and Cook County get back to you with a quote. It's free and there is no obligation.
Harvey is home to about 19,781 people (2024 Census Bureau estimate), a shrinking community (−2.7% since 2020). With 3,187 people per sq mi, it is a suburban area. Growing families here often add space instead of moving.
Harvey at a glance
- Population (Census Bureau estimate, 2024)
- 19,781 (−2.7% since 2020)
- Rank in Illinois
- 124th of 1,294 cities and towns
- Land area
- 6.2 sq mi
- Population density
- 3,187 people per sq mi (suburban)
- Type
- City (Harvey city)
- Main county
- Cook County
What to check before hiring in Harvey
- Zoning: check Harvey's setbacks, lot coverage and height limits first.
- License and permit: in Illinois, additions are built by licensed contractors under a permit.
- Structure: second stories need an engineer to check the existing house.
- Price drivers: size, foundation, roof tie-in, plumbing and finishes.
Useful official resources
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ICC: International Code Council
Official information and guidance.
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NAHB
Official information and guidance.
Services available in Harvey
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Room addition
Ground-floor addition with foundation, framing, roof and finishes.
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Second-story addition
New floor over the existing house, with structural engineering.
Frequently asked questions in Harvey
How much does an addition cost in Harvey, IL?
It depends on size, foundation and finishes. Describe your project: contractors who serve Harvey reply with a quote.
How long does it take?
Often a few months, plus design and permits.
Does an addition raise property taxes?
Usually, since it increases the assessed value.
Which addition contractors will contact me?
Up to three independent addition contractors who serve Harvey and the surrounding area, chosen for the service you need. Your details are shared only with your consent.
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.