Looking for a garage builder in Rock Island, IL? Describe your project once and up to three garage builders who work in Rock Island and Rock Island County get back to you with a quote. It's free and there is no obligation.
Rock Island is home to about 36,434 people (2024 Census Bureau estimate), a shrinking community (−1.8% since 2020). With 2,078 people per sq mi, it is a suburban area. Extra storage, workshops and EVs are driving garage projects here.
Rock Island at a glance
- Population (Census Bureau estimate, 2024)
- 36,434 (−1.8% since 2020)
- Rank in Illinois
- 51st of 1,294 cities and towns
- Land area
- 18 sq mi
- Population density
- 2,078 people per sq mi (suburban)
- Type
- City (Rock Island city)
- Main county
- Rock Island County
What to check before hiring in Rock Island
- Zoning: check setbacks and size limits in Rock Island.
- License and permit: in Illinois, garages are built by licensed contractors under a permit.
- EV ready: add a 240-volt circuit while walls are open.
- Price drivers: size, slab, doors, finish and electrical.
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 Rock Island
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Detached garage
Design and construction of a detached garage with slab, permit and electrical.
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Attached garage or garage apartment
Attached garage or garage with living space above.
Frequently asked questions in Rock Island
How much does a garage cost in Rock Island, IL?
It depends on size, materials and finishes. Describe your project: builders who serve Rock Island reply with a quote.
How long does it take?
Often a few weeks once permits are issued.
Kit or custom?
Kits can save money; custom builds match the house.
Which garage builders will contact me?
Up to three independent garage builders who serve Rock Island 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.