If you sit on a condo board or HOA, sewer repair is one of the least-fun line items you'll ever approve. It's expensive, it's disruptive, and it usually shows up right after a backup that nobody saw coming.
Before you sign a contract with the first plumber who quotes you, there are a few things worth knowing — some of which can save your association tens of thousands of dollars and months of resident complaints.
Here's what to look for, what to ask, and what to push back on.
Understand what you're actually repairing
The first thing to figure out — and it's often not what the first estimate assumes — is what section of sewer actually needs work.
Multi-unit buildings typically have three layers of sewer infrastructure:
- Individual unit branch lines run from each unit's plumbing fixtures to a shared stack or lateral.
- The building's main sewer line collects flow from all the units and runs out to the property line.
- The service lateral connects the building's main to the public sewer.
Backups can originate anywhere in that stack. Before your association pays for a repair, someone should do a video inspection of the entire run — not just guess at where the problem is based on which unit called first.
We've seen buildings pay for excavation-based repairs that didn't actually fix the problem because the real damage was in a section nobody looked at. A camera inspection is cheap insurance against that.
Ask about trenchless options before approving excavation
Traditional sewer repair means digging up the pipe. In a condo building, that can mean tearing up parking lots, courtyards, driveways, mature landscaping, and sometimes concrete pads under the building itself. Add restoration costs, and a "simple" repair can double or triple in price.
Trenchless methods — specifically cured-in-place pipe lining (CIPP) — restore the existing pipe from the inside without digging. A liner is inserted through an access point, expanded, and cured in place. When it's done, the building has what's effectively a new pipe inside the old one, with a lifespan measured in decades.
For associations, the math matters:
- Trenchless work is typically completed in one to a few days, versus one to several weeks for a full dig.
- Residents don't lose access to parking, entryways, or common areas the way they do with excavation.
- Restoration costs — the money you spend rebuilding what got dug up — largely disappear.
- The pipe itself often costs less to line than to replace by excavation, especially once restoration is factored in.
Not every pipe is a candidate for lining. Fully collapsed pipes, severe misalignments, and certain material combinations can rule it out. But the only way to know is to have someone qualified assess the pipe first.
Get a real scope of work — not a range
The single biggest source of board frustration on sewer projects is scope creep. You approve a $30,000 project, and it comes in at $52,000 because "we found more damage once we opened it up."
Some of that is unavoidable, you don't always know what's underground until you look — but a lot of it comes from vague estimates that leave the contractor room to expand.
Before you sign, the estimate should include:
- The specific length of pipe being repaired, measured in feet.
- The method being used (excavation, lining, pipe bursting, spot repair, etc.).
- What's included in the price: access points, camera inspection, cleaning, restoration, permits, and cleanup.
- What's not included — usually landscaping restoration, concrete work, or repairs to sections not identified in the initial scope.
- A written warranty on both the pipe and the work.
If any of that is missing, ask for it in writing before you sign. A reputable contractor will provide it without pushback.
Verify the contractor actually does this kind of work
Multi-unit sewer work isn't the same as residential sewer work. The pipes are longer, the diameters are larger, the access points are trickier, and the coordination with residents and building staff takes real project management.
Ask any contractor bidding on the job:
- Have you done work on condo buildings or multi-unit properties of similar size?
- Can you show me a recent case study or reference from a similar association?
- What's your process for communicating with residents during the work?
- Who's the point of contact for the board during the project?
If the answers are vague, keep shopping.
For reference, we recently completed a 200-foot sewer lining project for an 18-unit condominium association in northern Illinois. The board had originally approved a full traditional replacement — until a second opinion showed the pipe was a candidate for lining, which reduced the project cost significantly and cut the disruption timeline down to a fraction of the original plan.
Plan for financing before the emergency
The worst time to figure out how a project gets paid for is after a backup has already flooded three units.
If your association has a reserve fund earmarked for major repairs, great — that's what it's for. If it doesn't, or if the repair is larger than reserves can cover, most associations use one of three approaches:
- A special assessment distributed across all units.
- A loan or line of credit at the association level, repaid through regular dues over time.
- Contractor financing, when it's available, spreading the payment across months rather than requiring a lump sum.
Each has trade-offs, and each takes time to arrange. Boards that plan for how they'd finance a major sewer repair before they need one are in much better shape than boards that don't.
The bottom line for boards
Sewer repair for a multi-unit building isn't a decision to rush. The differences between doing it well and doing it fast are measured in tens of thousands of dollars and months of resident complaints.
Before your board approves anything, make sure you have:
- A full camera inspection of the entire affected run.
- At least one bid that includes trenchless options, not just excavation.
- A written scope with specific lengths, methods, and inclusions.
- A contractor with real multi-unit experience and references.
- A plan for how the project gets paid for.
If you've already been quoted for a traditional excavation-based repair and want to know whether trenchless is an option, we offer a Free Second Opinion — no obligation, and if the pipe isn't a candidate for lining, we'll tell you.
Get a Free Second Opinion for Your Association