Subgrade preparation cost per square yard in Illinois
Updated · BuildGets Team
Public bids in Illinois put the subgrade preparation at a median of $1.45 per square yard, with the middle half of bids between $1.25 and $2.06. That is 61 % below the national median of $3.75. Based on 12 bidder prices from 2 public bid tabulations opened between November 2023 and June 2024.
| Median bid in Illinois | $1.45 / SY |
| Middle 50 % of bids | $1.25 – $2.06 |
| National median | $3.75 (-61 %) |
| Bidder prices · bid tabs · owners | 12 · 2 · 1 |
Bid tabs in Illinois
| Owner | Bid opening | Low bid | Median of bids | Bids |
|---|---|---|---|---|
| Fire Station 93 Parking Lot | Jun 2024 | $0.01 | $0.55 | 6 |
| 2024 Kings Road and Alameda Drive Drainage Improvements | Nov 2023 | $1.10 | $1.98 | 9 |
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: subgrade preparation unit price. Every unit price in Illinois: Illinois unit prices.
Cite as: BuildGets BID, Subgrade preparation cost per square yard in Illinois, October 2026. https://www.buildgets.com/us/unit-prices/subgrade-preparation/il/ (CC BY 4.0)
Questions
How much does a subgrade preparation cost in Illinois?
Public bids in Illinois put the subgrade preparation at a median of $1.45 per square yard, with the middle half of bids between $1.25 and $2.06. That is 61 % below the national median of $3.75. Based on 12 bidder prices from 2 public bid tabulations opened between November 2023 and June 2024.
Is Illinois more expensive than the national average?
For this item the Illinois median bid is 61 % below the national median of $3.75. Bid prices depend on the owner, the job size and what the item includes, so compare with the sources below.