Price guide · updated October 2026
Basement Waterproofing Cost in Lancaster, PA
What a dry basement costs in Lancaster County.
Typical installed prices for every service we offer, what moves them, and the questions people ask before they call. These are typical ranges. They are not quotes, and every real number starts with a free inspection and a written estimate.
Typical prices
Typical installed prices, service by service
Residential work with labor and materials included, from 2025 and 2026 cost guides checked against construction wages in the Lancaster area. They show what homeowners typically pay. They are not a Basement Gurus price list, and your free inspection sets the real number.
Basement Waterproofing
Typically $3,000–$12,000 · one or two walls up to a full perimeter
- Interior drain and sealed sump, one or two walls
- $3,000–$7,000
- Draining only the walls that leak. A small job still carries the cost of the sump basin and the crew’s day.
- Full-perimeter interior drain and sealed sump
- $6,000–$12,000
- A 30 by 40 foot basement has 140 feet of wall. Stone or block walls, a second sump and finished walls push it up.
- Interior drain, per linear foot
- $40–$85 / ft
- The trench, stone, pipe, new concrete and the connection to the sump.
- Exterior excavation and membrane
- $10,000–$15,000+
- Digging to the footing outside. Depth, decks, walks and landscaping add to it.
- Crack injection
- $250–$800 / crack
- For a leaking crack in a wall that has not moved. A wall that has moved is a structural repair.
- Wall vapor barrier
- $1,500–$3,000
- Over block walls that wick moisture into the room.
- Dehumidifier, installed
- $1,000–$2,000
- Sized to the space and drained to the sump or a drain line.
Sump Pump Systems
Typically $1,200–$2,500 · new pump and sealed basin
- New sump pump and sealed basin
- $1,200–$2,500
- Cutting the floor, setting the basin and the hookups.
- Battery backup pump
- $600–$2,000
- Keeps water moving through a power outage.
- Replacing a pump in an existing basin
- $350–$1,000
- No digging. Cast-iron and high-capacity pumps sit at the top of the range.
Drainage Solutions
Typically $150–$350 · per buried downspout
- Buried downspout line
- $150–$350 each
- Carries roof water away from the wall in solid pipe.
- Regrading along the foundation
- $1,000–$3,000
- Soil sloped away from the house so rain runs off.
- Yard or curtain drain
- $10–$35 / ft
- About $1,000–$4,000 for a typical run. Rock and heavy clay cost more to trench.
- Exterior drain dug to the footing
- $1,500–$4,000 / side
- Per side of the house, where water is reaching the wall below grade.
Foundation Repair
Typically $2,200–$8,200 · most repairs
- Most foundation repairs
- $2,200–$8,200
- From sealing cracks to reinforcing a wall.
- Bowing wall stabilized
- $5,000–$12,000
- Wall anchors, carbon fiber or steel straps, or braces, depending on how far the wall has moved.
- Underpinning piers
- $1,000–$4,000 / pier
- Most guides put a pier at $1,000–$3,000, helical piers at $2,000–$4,000. Settlement repairs usually need several.
- Stone foundation repointing
- $5–$25 / sq ft
- About $3,500–$10,000 for a whole stone foundation.
Crawl Space Repair
Typically $2,500–$7,500 · most repairs
- Most crawl space repairs
- $2,500–$7,500
- Water, wood and supports, priced after someone has been underneath.
- Sistering a damaged joist
- $200–$1,000 / joist
- New lumber fastened alongside a cracked or sagging joist.
- New support beam or posts
- $1,500–$4,000
- Where the floor above sags along one line.
- Sill plate replacement
- $120–$200 / ft
- Rotted wood on top of the foundation wall, replaced in sections.
Crawl Space Encapsulation
Typically $3–$7 / sq ft · most homes $5,000–$15,000
- Full encapsulation
- $3–$7 / sq ft
- Most full encapsulations land at $5,000–$15,000, depending on size and what is underneath.
- Dehumidifier, installed
- $1,000–$2,000
- Holds the sealed space at a steady humidity.
- Floor vapor barrier only
- $1,500–$4,000
- Covers the ground without sealing walls or vents.
Mold Remediation
Typically $15–$25 / sq ft · of affected area
- Mold remediation
- $15–$25 / sq ft
- Per square foot of affected area, with containment and HEPA filtration.
- Part of a basement
- $1,500–$3,000
- A wall or a corner. A whole basement runs well above this.
- Crawl space
- $500–$2,000
- Depends on the size of the space and how much wood is affected.
Basement Finishing
Typically $30–$50 / sq ft · finished space
- Basement finishing
- $30–$50 / sq ft
- About $30,000–$50,000 for 1,000 square feet, before any waterproofing.
- Egress window
- $2,500–$8,000 each
- Window, well and a new opening cut in the wall. Guides disagree widely on this one.
Typical ranges as of October 2026, from HomeGuide, HomeAdvisor, Fixr, This Old House and Groundworks cost guides and U.S. Bureau of Labor Statistics wage data for the Lancaster metro. They are not quotes; your written estimate is.
Worked example
How the math works on a typical basement
A 30 by 40 foot basement has 140 feet of wall. At the $40–$85 a linear foot that cost guides give for an interior drain, a full perimeter comes to about $5,600–$11,900, which is why most full systems land in the $6,000–$12,000 range.
Draining only the walls that leak costs less, though a small job still carries the sump basin and a crew’s day, so one or two walls typically run $3,000–$7,000. A battery backup, a second sump, stone walls and finished walls that have to come down and go back up are what move a basement from the bottom of its range to the top.
What moves the price
Six things that decide what your basement costs
How much wall needs draining
One leaking wall on the uphill side is a different job from a full perimeter. The written scope names the walls and the reason for each.
What the walls are made of
Poured concrete is the simplest. Block walls often need a barrier because they wick moisture, and stone foundations may need repointing before anything is fastened to them.
The ground under the house
Limestone delivers water fast and needs pump capacity, shale clay holds water against the wall and pushes, hillside schist sends it to one wall, and river terraces push it up through the slab.
Sumps, backups and the discharge
A second sump, a battery backup and a long discharge line carried far enough downhill each add a line to the estimate.
Finished space and access
Drywall, flooring and built-ins along the walls come out and go back. Tight stairs and low crawl spaces slow the work.
Repairs found along the way
A bowing wall, a settled corner or a rotted sill is priced as its own line, and the inspection is where those get found.
Not sure which ground you are on? Find your town and its page explains the ground under it.
Cost questions
Questions about prices
Are basement repair prices in Lancaster County higher or lower than the national average?
About the same, or a little lower. Construction wages in the Lancaster metro run about 5 percent below the national average (U.S. Bureau of Labor Statistics, May 2025), so national cost ranges are a fair guide here. Old stone and block foundations, limestone and shale ground, and tight access are what push individual jobs up.
Is it cheaper to fix a wet basement from the inside or the outside?
Inside, usually. An interior drain with a sealed sump typically runs $6,000 to $12,000 for a full perimeter, while excavating the outside of the foundation and membraning it typically starts around $10,000 and climbs from there. Outside work still has its place: downspouts, grading and yard drains are among the cheapest fixes on this page.
How much does it cost to fix a crack in a basement wall?
Injecting a leaking crack in a wall that has not moved typically costs $250 to $800 per crack. A crack that is wide, horizontal, or comes with a wall that has moved is a structural repair, and stabilizing that wall typically runs $5,000 to $12,000.
Why do two waterproofing estimates for the same basement differ so much?
Usually because they price different jobs. One may drain every wall to a single pump with no backup, another two walls to a sealed basin with a battery backup; one may include a wall barrier or crack repairs and the other leave them off. Line them up on feet of drain, sumps and backups, wall barrier, discharge route and warranty before comparing totals.
Does homeowners insurance pay for waterproofing?
Usually not for the waterproofing itself. Standard policies tend to exclude groundwater seepage and flooding, while sudden events such as a burst pipe are treated differently, so read your own policy or ask your agent. Flood coverage is a separate policy.
Will waterproofing pay for itself when I sell?
National cost guides say you may not get every dollar back at resale, but a dry basement with a transferable warranty is something buyers and their inspectors ask about. Our waterproofing warranty transfers with the house, so the paperwork can be handed over at closing.
Can I spread the cost of a bigger job?
Yes. Financing is available and there is no money down, so a full system or a foundation repair can be paid over time. Ask about the options when you get the written price, and compare them against the fixed total on the estimate.
More answers on the FAQ page, and each service page has its own questions.
Get a real number on your basement.
A free inspection, then a written scope and a fixed price before anyone touches your house. No money down, financing available.