Waterproofing & Foundation Waterproofing in Chicago, scoped line by line
Waterproofing in Chicago, IL — foundation membranes, interior systems, and crack repair that keep water out for good, installed by OnSite crews. Your phone estimate is free; call (773) 900-7007.
Exterior membranes and interior systems matched to how water gets in
Foundation cracks sealed and drained, not just painted over
Sump, drain tile, and grading addressed as one system
One accountable crew and a documented, line-item scope
Scoped, priced, approved — then built.
Send photos
Text us a couple of photos of what you're looking at. That's enough to start.
Walkthrough
A Zoom walkthrough of the space — it waives the $149 in-person written estimate.
Line-item estimate
A sectioned estimate with every line priced. You approve every line before any crew arrives.
The build
Our crews run the sequence — demo to punch list — and you sign off on the finished work.
- 01Excavation
- 02Membrane
- 03Crack injection
- 04Drain tile
- 05Grading
Each pass lands in your estimate as its own priced section — nothing hides in a lump sum.
Get your waterproofing & foundation waterproofing estimate
Your phone and text estimate is free. An in-person written estimate is $149 — a Zoom walkthrough waives it. On hourly (time-and-materials) jobs, a $129 fee applies per material run. Tell us about the project and we’ll come back with a clear, line-item scope.
The waterproofing & foundation waterproofing estimate, sectioned
- Excavation
- Membrane
- Crack injection
- Drain tile
- Grading
Every line priced. No lump sums.
Itemized · you approve every lineWaterproofing & Foundation Waterproofing in Chicago — common questions
How do you stop a wet basement in Chicago?
We trace where the Chicago, IL water actually enters — grading, cracks, or hydrostatic pressure — and build the system to that, not a one-size patch.
Is interior or exterior waterproofing better?
It depends on the source and the site. We tell you straight which one solves your problem and why, and price both when both are real options.
Do I get a written, line-item estimate for waterproofing & foundation waterproofing?
Yes — you get a sectioned, itemized estimate before any commitment, so you see exactly what each part of the work costs. No lump sums, no surprise change orders.
Are OnSite crews licensed and insured?
Yes. Every OnSite crew is insured, bonded, and background-checked, and one accountable team stays with your project from the first estimate to the final walkthrough.
Do you offer financing?
Yes — financing is available through licensed lending partners, so you can spread the cost over time. It's optional and there's no obligation; we can set it up once your estimate is ready.
Is the estimate really free?
Yes. Your estimate is free and there's no obligation — we scope and price the work up front so you can decide with the full picture in hand.
More work we take on in Chicago
Terms & disclosures — Illinois
OnSite General Contracting is licensed and insured to perform work in Illinois. Estimates are provided under the Illinois Home Repair and Remodeling Act.
- Illinois Home Repair and Remodeling Act: a written contract is provided for projects over $1,000.
- Consumers receive the "Home Repair: Know Your Consumer Rights" pamphlet before work begins.
- Right to cancel within 3 business days for eligible home-solicitation sales.