12-inch connection to existing main cost

Updated September 27, 2026 · BuildGets Team

Public bids put the 12-inch connection to existing main at a median of $7,100 each, with the middle half of bids between $4,435 and $10,750. Based on 71 bidder prices from 12 public bid tabulations.

Median bid	$7,100 / EA
Middle 50 % of bids	$4,435 – $10,750
Bidder prices	71
Bid tabulations	12

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By state

State	Median bid	Bids	Bid tabs
Texas	$8,000	60	8
Illinois	$5,911	14	3

By project

Owner	State	Bid opening	Low bid	Median of bids	Bids
CITY OF AUSTIN	TX	Apr 2026	$4,250	$6,113	18
City of Austin	TX	Apr 2026		$7,500	6
CITY OF AUSTIN	TX	Feb 2026		$9,250	6
City of Austin	TX	Feb 2026		$36,055	6
City of Austin	TX	Jan 2026		$6,534	4
CITY OF AUSTIN	TX	Dec 2025		$8,000	5
CITY OF AUSTIN	TX	Nov 2025	$3,500	$6,750	12
CITY OF AUSTIN	TX	Nov 2025		$9,000	3
Kings Road Watermain	IL	Jun 2025		$13,125	2
City of Falls City	NE	Jun 2025		$1,502	2
Lake Marian Woods Watermain Replacement	IL	Jun 2023		$5,821	7
2022 LINCOLNWOOD MANOR RECONSTRUCTION	IL	Dec 2022		$5,450	5

Related unit prices

Connection to existing main: $3,000 / EA
4-inch connection to existing main: $2,977 / EA
6-inch connection to existing main: $4,000 / EA
8-inch connection to existing main: $3,500 / EA
10-inch connection to existing main: $3,132 / EA
16-inch connection to existing main: $13,000 / EA
24-inch connection to existing main: $9,000 / EA

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 12-inch connection to existing main cost?

Public bids put the 12-inch connection to existing main at a median of $7,100 each, with the middle half of bids between $4,435 and $10,750. Based on 71 bidder prices from 12 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.