4-inch underdrain cost per linear foot
Updated · BuildGets Team
Public bids put the 4-inch underdrain at a median of $35.00 per linear foot, with the middle half of bids between $21.50 and $64.55. Based on 31 bidder prices from 9 public bid tabulations.
| Median bid | $35.00 / LF |
| Middle 50 % of bids | $21.50 – $64.55 |
| Bidder prices | 31 |
| Bid tabulations | 9 |
By project
| Owner | State | Bid opening | Low bid | Median of bids | Bids |
|---|---|---|---|---|---|
| CITY OF AUSTIN | TX | Nov 2025 | $65.00 | 3 | |
| City of Worthington | MN | May 2023 | $12.00 | $12.00 | 2 |
| S. Platte River Drive Improvements, W. Virginia to W. Bayaud Ave. | $194 | $147 | 4 | ||
| South Federal Green Boulevard | $50.00 | $72.50 | 4 | ||
| I-25 & Broadway Interchange Reconstruction Segment | $220 | 1 | |||
| High Line Canal Underpass at Hampden and Colorado | $15.00 | 6 | |||
| High Line Canal Parker & Mississippi | $21.50 | 6 | |||
| Federal Blvd Reconstruction, 5th Ave to Howard Place | $33.64 | 5 | |||
| Colfax & Lipan Intersection Improvements, Phase 1 | $19.50 | $38.00 | 4 |
Related unit prices
- Underdrain: $49.77 / LF
- 6-inch underdrain: $20.00 / LF
Prices are what contractors bid on public jobs, not installed costs from a price book. What each item includes varies by owner: read the item description before comparing. Methodology and all items: water and sewer unit price index.
Questions
How much does a 4-inch underdrain cost?
Public bids put the 4-inch underdrain at a median of $35.00 per linear foot, with the middle half of bids between $21.50 and $64.55. Based on 31 bidder prices from 9 public bid tabulations.
Does the price include excavation and restoration?
It depends on each bid form: some owners include excavation, bedding, backfill or restoration in this item and others pay them as separate items. Check the item description of each source.