Sewer Line Replacement cost: Denver vs Longmont (2026)
In 2026, sewer line replacement is about 9% more expensive in Denver than in Longmont. Most homeowners pay around $8,850 in Denver versus $8,150 in Longmont — a gap of roughly $700.
Denver CO
Typically around $8,850
Longmont CO
Lower costTypically around $8,150
Denver vs Longmont: full breakdown
| Factor | Denver | Longmont |
|---|---|---|
| Typical 2026 cost | $8,850 | $8,150 |
| Estimated range | $3,700–$14,000 | $3,400–$12,850 |
| Labor index (vs US) | ×1.09 | ×1 |
| Climate zone | Cold | Cold |
| Climate factor | ×1.05 | ×1.05 |
| Local permit | $275 | $250 |
| Labor share | $5,300 | $4,900 |
| Materials/equipment | $3,550 | $3,250 |
Sewer line replacement numbers here are 2026 planning ranges, adjusted per city — useful for budgeting, not a substitute for an actual quote.
Is the gap worth worrying about?
A 9% spread (roughly $700) is significant enough to plan around, but not fixed — off-peak timing and sharper bidding in Denver typically recover some of it.
Sewer line replacement by type: Denver vs Longmont
We localize each sewer line replacement type separately for both metros, applying the same labor, climate and permit adjustments each time, so you're comparing like for like.
| Type | Denver | Longmont |
|---|---|---|
| Trenchless lining (CIPP) | $4,850–$14,000 | $4,450–$12,850 |
| Pipe bursting | $6,000–$15,150 | $5,500–$13,900 |
| Traditional excavation | $3,700–$15,150 | $3,400–$13,900 |
All figures are 2026 localized planning estimates for sewer line replacement — get an actual quote before you commit.
Sewer line replacement by line length: Denver vs Longmont
Sewer replacement is priced largely by the length of line from the house to the city main, at roughly $50–$250 per foot depending on method, depth, and what's above the trench.
| Size | Denver | Longmont |
|---|---|---|
| 25 ft (short run) | $2,550–$7,150 | $2,350–$6,550 |
| 50 ft (typical) | $3,700–$10,550 | $3,400–$9,700 |
| 75 ft | $5,400–$14,000 | $5,000–$12,850 |
| 100+ ft (long / deep run) | $7,150–$20,850 | $6,550–$19,150 |
All figures are 2026 localized planning estimates for sewer line replacement — get an actual quote before you commit.
What plumbing pros earn in each metro
With labor making up about 60% of a sewer line replacement job, wage differences between metros do most of the work here. These figures are real BLS OEWS installer wages, not modeled estimates.
Denver-Aurora-Centennial metro · about 15% above the US average installer wage.
No BLS metro wage series for Longmont; we use Colorado regional price parity instead.
Source: U.S. Bureau of Labor Statistics, OEWS metro wages for HVAC installers (used as a trade-labor index).
Cheapest time for sewer line replacement in either city
You can't time an emergency, but you can time a repipe or sewer job — and doing it in a slower month means slightly better pricing and a crew with the bandwidth to do it right.
How do you budget a major plumbing job?
There's no fixed price for a repipe or sewer job until you know the method and what's below the yard. Our editors on how to think about the scope.
The material case
In freeze-prone regions PEX has the advantage: cheaper, quicker to run, and forgiving when temperatures drop. Copper asks for more up front but outlasts it and can nudge resale with certain buyers. The tiebreaker is your weather and your timeline in the house, not a blanket rule.
The diagnosis-first case
The estimate is only as honest as the inspection behind it. Push a camera down the line first and the scope becomes a documented fact — no padding for problems that aren't there, no ambush once the trench is open.
The method case
Trenchless runs a higher per-foot rate, but the savings hide in what you never have to rebuild — no torn-up driveway, no re-sodded lawn, no ripped-out patio. Open-cut digging only wins on price when there's almost nothing on top of the line to put back.
Get the camera inspection first, weigh trenchless against the full restoration cost — not just the dig — and pick pipe material for your climate. The scope, not the brand, sets the price.
Denver vs Longmont
Is sewer line replacement cheaper in Denver or Longmont?
Longmont wins on price: sewer line replacement runs about $8,150 there versus $8,850 in Denver, a gap of roughly $700 (9%) as of 2026.
Why does sewer line replacement cost more in Denver than Longmont?
It comes down to labor: Denver indexes at 1.09 against Longmont's 1. The cold-vs-cold climate difference, plus permit fees, adds to the gap.
How much is sewer line replacement in Denver, CO?
Denver homeowners can expect $3,700 to $14,000 for sewer line replacement in 2026, with $8,850 the typical number.
When is the cheapest time to buy sewer line replacement — and does it differ by city?
It doesn't vary by location — Off-peak winter for planned work is the discount window in both Denver and Longmont (roughly Around 5% off), while anytime it becomes an emergency tends to be the most expensive in either city.
Should I choose where to live based on sewer line replacement cost?
Rarely. The $700 difference is real but one-time, and you can often close most of it in Denver by buying in the off-season and getting tighter, apples-to-apples bids. Ongoing factors — energy prices, climate and home condition — matter more over the life of the system.
Compare sewer line replacement in other cities
Updated June 2026 · By Serhat Özçelik