Aggregate base course cost per square yard in Illinois
Updated · BuildGets Team
Public bids in Illinois put the aggregate base course at a median of $14.00 per square yard, with the middle half of bids between $10.00 and $21.00. That is 7 % below the national median of $15.00. Based on 77 bidder prices from 10 public bid tabulations opened between December 2022 and May 2026.
| Median bid in Illinois | $14.00 / SY |
| Middle 50 % of bids | $10.00 – $21.00 |
| National median | $15.00 (-7 %) |
| Bidder prices · bid tabs · owners | 77 · 10 · 2 |
Bid tabs in Illinois
| Owner | Bid opening | Low bid | Median of bids | Bids |
|---|---|---|---|---|
| Village of River Forest | May 2026 | $140 | $65.00 | 6 |
| VILLAGE OF ELBURN | Feb 2026 | $1.00 | $101 | 2 |
| 2025 Non-MFT Resurfacing | May 2025 | $35.00 | $25.00 | 5 |
| Old Town 1-A Recon. | Jun 2024 | $8.00 | 9 | |
| 2024 Kings Road and Alameda Drive Drainage Improvements | Nov 2023 | $15.00 | $18.00 | 9 |
| 2023 Eastside and CDBG Resurface Project | Aug 2023 | $11.75 | $11.83 | 5 |
| 2023 Carpentersvile Golfview and Williams Road Culverts | Apr 2023 | $9.00 | $11.50 | 12 |
| 2023 South Lord On-street Parking | Apr 2023 | $54.00 | $15.11 | 12 |
| 2023 HIGH CAPACITY INLET PROJECT | Apr 2023 | $26.00 | $40.00 | 3 |
| 2022 LINCOLNWOOD MANOR RECONSTRUCTION | Dec 2022 | $13.00 | 20 |
Prices are what contractors bid on public jobs in Illinois, not installed costs from a price book. What each item includes varies by owner: read the item description in each bid tab before comparing. National figure and every state: aggregate base course unit price. Every unit price in Illinois: Illinois unit prices.
Cite as: BuildGets BID, Aggregate base course cost per square yard in Illinois, October 2026. https://www.buildgets.com/us/unit-prices/aggregate-base-course-per-sy/il/ (CC BY 4.0)
Questions
How much does an aggregate base course cost in Illinois?
Public bids in Illinois put the aggregate base course at a median of $14.00 per square yard, with the middle half of bids between $10.00 and $21.00. That is 7 % below the national median of $15.00. Based on 77 bidder prices from 10 public bid tabulations opened between December 2022 and May 2026.
Is Illinois more expensive than the national average?
For this item the Illinois median bid is 7 % below the national median of $15.00. Bid prices depend on the owner, the job size and what the item includes, so compare with the sources below.