Most sewer bids are lost on paper, not in the trench. I watched a $90,000 lateral replacement go to a crew that quoted higher than everyone else, and the winning package was forty pages thin. The reason was simple: their submittal answered every question a general contractor’s project engineer had already written down before anyone picked up a shovel.
If you run a small plumbing outfit and you’re tired of being the low bid that still loses, the fix usually isn’t your price. It’s the packet you hand over. Let’s walk through what a commercial GC actually needs from you, and how to build a documentation habit that pays for itself on every sewer line repair job you quote.
The short version: treat every bid like a submittal. Document the pipe, the soil, the access, the risk, and the closeout. Do that consistently and you stop competing on price alone.
What GCs Actually Check Before They Call You Back
A project engineer on a mid-size commercial build has a mental checklist, and it has almost nothing to do with your hourly rate. They want to know: can you get in and out without shutting down their site, can you prove the fix, and will you create paperwork problems for them later?
According to the Environmental Protection Agency, most sewer collection systems in older cities are combined or aging, which means what you find underground is rarely what the drawings show. That single fact drives every question a GC will ask you. They’ve been burned before by a crew that hit a surprise and disappeared into a change order fight for six weeks.
So build your bid around the unknown. Show them you’ve already thought about it. A one-page site assessment with photos, a marked-up utility map, and a stated contingency approach beats a glossy brochure every time. I’ve seen estimators drop a fancy cover page and win on that alone.
The Five-Part Job Packet That Wins Repeat Work
Here’s the framework. Call it the FIVE packet: Findings, Interface, Verification, Escalation, Exit. I built it after losing three bids in a row to a competitor who was simply more organized. It’s not clever. It’s just complete, and that’s the whole point.
Findings. Every bid gets a pre-bid inspection note. Pipe material, diameter, depth, soil type, and any root intrusion you can see. If you can’t get on site before bidding, say so in writing and price the inspection as a line item. GCs respect that more than a guess.
Interface. How your work touches theirs. Traffic control, excavation limits, restoration scope, and who owns the spoils. This is where most small contractors get hammered on change orders, because they never defined the edges of the job.
Verification. Post-repair CCTV footage with a time stamp, plus a short-written pass on pipe condition. Ten minutes of recording has saved me more arguments than any contract clause.
Escalation. A named contact, a phone number, and a stated response window. Not “call us anytime.” An actual person and an actual window.
Exit. Restoration, cleanup, and a one-page closeout summary the GC can staple into their own project file. That last item is why they call you back.
Why the Exit step matters more than you think
When a GC’s project engineer has to assemble closeout documents, every sub who handed them a clean summary saves them hours. Those hours get remembered. I know contractors who win work purely because their closeout packets are easy to file. Boring advantage, but a durable one.
How to Price the Unknown Without Blowing the Bid
Split your number into fixed and provisional. The fixed piece covers labor, equipment, and materials you can guarantee. The provisional piece handles rock, unexpected utilities, or deeper-than-anticipated pipe, and it comes with a written trigger for when it kicks in.
General contractors hate a lump sum that hides a landmine, and they hate an open-ended hourly just as much. A split number with a defined trigger reads as professional. It also protects you from the job that eats your margin because you bid one fixed price against a site you’d never seen dry.
Use standard construction cost baselines when you justify the provisional figure. The U.S. Census Bureau publishes broad construction spending data that can support an industry-level assumption about material and labor volatility, and citing the general trend beats inventing a percentage you can’t defend in a bid meeting.
Three Documentation Mistakes That Quietly Cost You Work
You probably know the big ones. These are the small ones, and they’re sneaky.
- Photos without scale or orientation. A crack shot with nothing for reference reads as noise to an engineer.
- Scope language that says “as needed” instead of naming a limit. That phrase is where change order fights are born.
- No stated assumption about access. If you assumed a clear path to the cleanout, write it down.
Fix those three and your bids start reading like they came from a bigger shop. That’s not a bad thing. Commercial clients pay a premium for the feeling that nothing is going to surprise them.
Building a Repeatable Bid System
Consistency is the whole game. Keep templates for the FIVE packet, the split pricing sheet, and the closeout summary. Update them after every job with what actually happened on site, because the surprises repeat more than anyone admits.
I’d rather lose a bid because I was honest about a risk than win one and spend three months defending a change order. In commercial plumbing work, the contractors who survive are the ones the GC trusts to be boring and predictable. Predictability is a product. Package it that way.
Next time you quote a sewer job, hand over the full packet instead of a number. Then ask the GC one question: “What’s missing from this that would have made your job easier?” That answer is worth more than any bid you’ll ever win.
