Basement waterproofing contractors, whether solo operators or small crews, send invoices for interior drainage systems, sump pump installs, crack injection, exterior excavation and membrane work, and window well or grading fixes. Jobs are usually billed per linear foot, per fixture, or as a flat project price, often with a deposit and a progress or final payment.
Create an invoice for payment collection
Upload logo
PDF will be generated with filename:
Invoice_1001_Client_2026-10-14.pdf
Most basement waterproofing is priced as a flat project fee built from linear footage of drain tile or perimeter system, the number of sump pits and pumps, and any add-ons such as dehumidifiers, vapor barrier, or wall sealing. Interior drain systems are typically quoted per linear foot, exterior excavation and membrane per linear foot of wall with depth factored in, and crack repair per crack. Small repairs and diagnostic visits may be billed hourly or as a trip-plus-labor charge. Materials such as pumps, basin liners, discharge pipe, gravel, and membrane are either built into the unit price or itemized with a markup of roughly 15-30%. Concrete removal and replacement, difficult access, rock or high water table, and electrical work for pump circuits are the common reasons for change orders. Many contractors also sell warranty tiers and maintenance plans, such as annual sump pump inspections.
| Service | Priced | Typical range |
|---|---|---|
| Interior perimeter drain tile system (French drain with sump discharge) | per linear foot | $50-100 |
| Sump pump and basin installation (primary pump) | flat fee | $1,000-2,500 |
| Battery backup sump pump system | flat fee | $800-2,000 |
| Foundation crack injection (epoxy or polyurethane) | per crack | $400-900 |
| Exterior excavation, membrane, and drain tile | per linear foot | $80-200 |
| Interior wall sealing or crystalline waterproof coating | per sq ft | $3-8 |
| Crawl space vapor barrier installation | per sq ft | $2-6 |
| Diagnostic inspection and moisture assessment | flat fee | $150-400 |
Typical US ranges. Rates vary by region, experience, and job size.
| Description | Qty | Rate | Amount |
|---|---|---|---|
| Interior perimeter drain tile system installed along north and east walls, including concrete break-out, gravel bed, and drain tile | 70 linear ft | $70.00 | $4,900.00 |
| Sump basin with 1/3 HP primary pump, check valve, and discharge line to exterior | 1 each | $1,650.00 | $1,650.00 |
| Battery backup pump system with 12V battery | 1 each | $1,100.00 | $1,100.00 |
| Epoxy crack injection, south wall | 2 crack | $550.00 | $1,100.00 |
| Concrete patch and floor restoration over drain channel | 70 linear ft | $12.00 | $840.00 |
| Debris haul-away and disposal | 1 flat fee | $350.00 | $350.00 |
| Total | $9,940.00 | ||
Notes: Deposit of $3,000 received on contract signing, remaining balance due on completion. Payment due within 7 days by check, ACH, or card (3% card fee applies). Workmanship warranty of 10 years and pump manufacturer warranty of 3 years provided separately in writing. Warranty is conditional on the pump discharge remaining unobstructed and annual pump testing.
Disputes about where work was done come up when water returns later, and a clear record shows exactly what was covered.
Per-foot and per-unit pricing is easy to verify, so the client can match the invoice to the signed contract.
Warranty claims depend on identifying the exact equipment, and homeowners will need this for insurance and resale.
Many states and municipalities require a license for foundation or drainage work, and permits may apply to excavation or electrical work. Showing them proves the work was legal and inspected.
Hitting unexpected rock, additional cracks, or failed concrete changes the price, and signed approvals prevent the client from disputing extra charges.
A written transferable or limited warranty is a major selling point, and stating conditions like pump maintenance prevents claims for unrelated water issues.
Large jobs are paid in stages, and the invoice should show payments already made so the balance due is clear.
Waterproofing jobs are large enough that a deposit is standard, commonly 10-50% at signing with the rest due on completion or split into progress payments for excavation work. Materials-heavy jobs sometimes require a deposit big enough to cover pumps and membrane. Final payment is typically due on completion or within 7-14 days, with a late fee such as 1.5% per month stated in the contract. Many homeowners pay by check, ACH, or card, and some finance the work through the contractor or a third-party lender, so confirm how and when funds are released. Check your state's rules on deposit limits, right-to-cancel periods for home improvement contracts, and lien rights before setting terms.
Pumps, liners, and membrane are bought upfront and cannot be returned once installed. A deposit covering at least materials protects you if a job is cancelled or delayed by weather.
Photograph the wet walls, cracks, and open trenches before closing them up, and attach key photos to the invoice or job file. If the client claims work was skipped, you have proof of what is under the concrete.
When excavation uncovers a failed drain, a bigger crack, or extra concrete, get written approval and add it to the invoice immediately rather than adding surprise charges at the end.
If you sell annual pump checks or backup battery replacement, invoice those as their own line items so recurring revenue is distinct from installation.
State what the warranty covers, for how long, and what voids it, such as power failure, clogged discharge, or new foundation movement. Vague promises cause disputes years later.
Quote and invoice both ways by showing how the flat price is built from linear feet, fixtures, and add-ons. Unit pricing makes change orders easier because you can add or subtract footage at the same rate.
A deposit of 25-50% is common on larger jobs, and at least enough to cover materials on smaller ones. Some states cap home improvement deposits, so check your local rules.
Yes, many contractors charge a flat inspection fee of roughly $150-400 and credit it toward the job if the client signs. State this when scheduling so it is not a surprise.
Refer to the written scope and warranty, inspect the area, and document the cause. If it is a covered item, fix it under warranty. If the work matched the contract, send a reminder citing the due date and late fee terms, and consider a lien notice where allowed.
It depends on the state. Many states treat installation as a service or capital improvement and tax the contractor on materials instead, while others tax certain labor. Check with your state revenue department or a tax professional.
Send a Basement Waterproofing estimate for approval, then turn it into an invoice when the work is done.
Basement Waterproofing estimate template