Unclogging a main sewer line costs $350 – $650 for most jobs, with a national average of $475.3 Fixr (updated January 2025) scopes that average to hydro jetting a mid-sized clog in the pipe between a house and the municipal main; its low end is $75 (a chemical clearing) and its high end $2,750 (replacing a 10-foot section of line with an unrepairable clog).3 Angi (2026 data, from 1,037 verified projects) separately reports a $380 national average for main sewer line clog repair, with most homeowners paying $188 – $573. Corporate sibling HomeAdvisor publishes nearly identical but not matching figures – $376 average, $187 – $569 – kept with its own labels since the difference is unexplained.1,2 Fixr’s figures are separately published, and the pages state no shared sourcing. Prices below are national averages*.
*National averages, not local quotes. Your price depends on clog severity, clearing method, line accessibility, and local labor rates.
A note on safety. If the clog means part of the line must be replaced, the work involves excavation. Before any digging, contact 811 – the free national before-you-dig service – a few business days ahead so buried utility lines can be marked with paint or flags.4
$475
national average (Fixr)
$350–$650
average range (Fixr)
$380
average, 1,037 projects (Angi)
$188–$573
most homeowners (Angi)
What the sources say
| Source | Headline figures | Notes |
|---|---|---|
| Fixr (updated Jan 2025) | $475 average; average range $350 – $650; low $75; high $2,750 | Average scoped to hydro jetting a mid-sized clog between house and municipal main; high end is a 10-foot section replacement; separately published, pages state no shared sourcing |
| Angi (2026 data, updated Oct 2026) | $380 average (1,037 verified projects); most homeowners $188 – $573 | Corporate sibling of HomeAdvisor |
| HomeAdvisor (2025 data, updated Jun 2026) | $376 average; normal range $187 – $569 | Sibling-published figures nearly identical to Angi’s but not matching; the difference is unexplained, so each keeps its own labels |
All three sources report $45 – $200 per hour for this work (identical figures; sibling pages plus a separately published Fixr figure with no stated shared sourcing).
Cost by clearing method
Snaking and hydro jetting are the standard methods; the sibling pair publish identical snaking and jetting figures, and Fixr’s hydro jetting figure matches both (cross-owner, separately published):1,2,3
| Method | Angi/HomeAdvisor | Fixr (labor included) |
|---|---|---|
| Chemical clearing | – | $75 – $300 |
| Snaking (augering) | $100 – $250 | $100 – $500 |
| Rodding | – | $150 – $600 |
| Roto-rooter machine | – | $200 – $450 |
| Hydro jetting | $350 – $600 | $350 – $600 |
Angi prices a simple snake job at a flat rate averaging around $250.1
Cost by underlying problem
When the clog comes from damage rather than debris, costs rise; the sibling pair and Fixr price the common problems on their own spans:1,2,3
| Problem | Angi/HomeAdvisor | Fixr (labor included) |
|---|---|---|
| Minor debris removal | $100 – $600 (Angi) | – |
| Tree root removal | $100 – $1,000 | $100 – $800 |
| Bellied (sagging) pipe | – | $1,500 – $3,000 |
| Broken line section | – | $1,500 – $3,000 |
| General line repairs | $1,000 – $4,000 | – |
| Full pipe replacement | $3,000 – $25,000 | $50 – $250 per linear ft. |
| Trenchless pipe repair | $60 – $250 per foot | – |
| Basic pipe repairs | $50 – $250 per foot | – |
| Sewer line installation | $1,400 – $5,800 (HomeAdvisor) | – |
The tree-root spans differ between the sibling pair and Fixr; the sources do not reconcile the difference. Fixr prices replacement labor separately at $30 – $150 per linear foot, and excavation to reach a line under a concrete slab at around $150 per hour.2,3
Camera inspection and diagnostics
Angi and HomeAdvisor put a sewer camera inspection at $200 – $1,300 or more (sibling-published figures). Fixr reports $100 – $800, up to $1,500 for inspecting the entire sewer line system. The sources do not reconcile the difference.1,2,3
Labor fees and related services
HomeAdvisor notes a minimum service fee of about $200 is common even for quick repairs. Fixr adds: emergency service during non-business hours adds $50 – $100, evening, weekend, or holiday work adds a $45 – $200 premium to the hourly rate, and clearing branch drain lines costs $350 – $650 – the same as a main line clog.2,3
Related work: installing a sewer cleanout for easier future access costs $600 – $2,000 (Fixr); cleaning up after a sewage backup runs $2,000 – $10,000 depending on extent (Fixr).3
Ongoing and maintenance costs
Angi prices prevention and recurring items: drain traps $5 – $15 each, an annual plumbing inspection $100 – $1,380, septic tank pumping $175 – $600 every three to five years, and municipal water and sewer service at $15 – $150 per month.1
Fixr separately prices septic tank cleaning at $400 – $1,000 and periodic professional line cleaning at $150 – $600. Both HomeAdvisor and Fixr suggest professional cleaning every 18 – 22 months (a publisher recommendation, not a requirement).2,3
Permits
Cleaning a line rarely needs a permit, but repair or replacement work usually does: Angi and HomeAdvisor report $400 – $1,600 for extensive sewer repair permits (sibling-published). Fixr separately puts the average plumbing permit at $75. The figures reflect different scopes and are not directly comparable.1,2,3
Related projects
Main Water Line Repair Cost
See our guides to sewer line repair, sewer line replacement, trenchless sewer line repair, hydro jetting, and drain cleaning for those projects.
Frequently asked questions
How much does it cost to unclog a main sewer line?
Fixr reports $350 – $650 for most jobs, averaging $475 for hydro jetting a mid-sized clog. Angi reports a $380 average from 1,037 verified projects, with most homeowners paying $188 – $573.1,3
How much does hydro jetting a main line cost?
All three sources report $350 – $600 for hydro jetting (identical figures across Angi, HomeAdvisor, and Fixr; sibling pages plus a separately published Fixr figure with no stated shared sourcing).1,2,3
How much does a sewer camera inspection cost?
Angi and HomeAdvisor report $200 – $1,300 or more; Fixr reports $100 – $800, up to $1,500 for a full-system inspection.1,2,3
How much does tree root removal from a sewer line cost?
Angi and HomeAdvisor report $100 – $1,000; Fixr reports $100 – $800 with labor included. The sources do not reconcile the difference.1,2,3
Related guides
Sewer Line Repair Cost
Sewer Line Replacement Cost
Trenchless Sewer Line Cost
Hydro Jetting Cost
Drain Cleaning Cost
All cost guides
Sources
1. Angi — Main Sewer Line Clog Repair Cost (2026 data)
2. HomeAdvisor — Main Sewer Line Clog Repair Cost (2025 data)
3. Fixr — Cost to Unclog Main Sewer Line (updated Jan 2025)
4. 811 — Before You Dig