Lycoming County · 22 years · Family-owned
Basement Waterproofing & Foundation Repair in Williamsport, PA
Wet basement in Williamsport?
We tell water bye.
Family-owned, licensed and insured, with 22 years of keeping Pennsylvania basements dry, now with an office on West 4th Street serving Williamsport and Lycoming County. Free estimate, no money down, and a lifetime waterproofing warranty that transfers when you sell.
Transferable WarrantyNo money down · Financing
Get your free estimate
Send it and we’ll get in touch to set up your free inspection.
22years in business
8services, one call
A+BBB rated
Lifetimetransferable waterproofing warranty
$0down, financing available
Why Williamsport basements are different
Behind the levee, along the creeks, up the hillsides. Different water, different fix.
The West Branch has passed its 20-foot flood stage at Williamsport about 40 times since records began in 1865. The 1936 flood put water in roughly 70 percent of the city. The levee built after it, dedicated in 1955, held through the record 34.75-foot crest of Agnes in 1972. It keeps the river out of the streets. Groundwater under the city, runoff off the hillsides and fast creek water are another matter, and that’s what reaches basements here.
Behind the levee
When engineers evaluated the levee in 2014, they found silt and clay sitting on a layer of sand and gravel. High water moves through that gravel, which is why the levee has relief wells on its dry side. The same high water table can push up through basement floors and the joint where the floor meets the wall.
What usually fixes it
Interior drainage to a sump pump with a battery backup, plus sealing the floor-wall joint.
Along the creeks
Loyalsock, Lycoming and Muncy Creeks rise fast. In September 2011 the remnants of Tropical Storm Lee pushed Loyalsock Creek up almost 15 feet in about 12 hours, to a record 19.78 feet at Loyalsockville, and flooded many properties in Montoursville. In an ordinary heavy storm, ground near a creek can soak through quickly, and water comes in low and fast.
What usually fixes it
A sump sized for fast inflow, a backup pump, and exterior grading and downspout fixes.
Hillsides above the river
From the slopes north of the city to South Williamsport at the foot of Bald Eagle Mountain, hillside homes catch runoff from everything uphill. It collects against the uphill wall and builds pressure there.
What usually fixes it
French drains and yard drainage to move water away, with wall crack repair and interior drainage where water is already getting in.
Pre-1940 city houses
About half of Williamsport’s homes were built before 1940, by Census estimates. Houses that age often stand on stone or brick foundations, and their lime mortar wears out. Walls weep, and some start to bow.
What usually fixes it
Interior drainage, a vapor barrier on the walls, and foundation wall stabilization where it’s needed.
Flood figures: National Weather Service gauges for the West Branch at Williamsport and Loyalsock Creek at Loyalsockville, the Williamsport Sun-Gazette, and the 2014 levee certification evaluation for the City of Williamsport. Housing age: U.S. Census Bureau, American Community Survey 2020–2024.
What we do
Eight services, one call
Basement Waterproofing
Interior drainage, sump pumps and wall sealing that keep water out for good.
Foundation Repair
Cracked, bowing and settling walls stabilized and repaired.
Crawl Space Encapsulation
Sealed vapor barrier and dehumidifier for a dry, clean crawl space.
Crawl Space Repair
Sagging floors and failing supports fixed from below.
French Drains & Yard Drainage
Move water away from the house before it reaches the foundation.
Sump Pumps
New installs, replacements and battery backups.
Mold Remediation
Mold removed and the moisture that caused it fixed.
Basement Finishing
Turn a dry basement into living space.
Waterproofing systems carry our lifetime warranty, which transfers when you sell. The written warranty terms for your job come with your estimate.
30-second self check
Is your basement telling you something?
Check anything you have noticed. No email required — the answer appears right here.
Nothing checked yet
Pick whatever sounds familiar
Most homeowners check two or three without realizing they are connected. If you are only here because something smells off, that counts.
How it goes
Four steps, no pressure, no gimmicks
You get a written scope and a fixed price before anyone touches your house. If a single wall is the problem, we quote a single wall.
You call or send the form
Call (570) 989-4489 or send the form, and we’ll get in touch to set up your free inspection.
A free inspection
We check where the water is coming from (inside, outside, grading and downspouts) and photograph what we find. You keep the photos.
A written scope and a fixed price
One page, no financing pressure and no expiring discount.
We build it and warranty it
Most jobs take one to three days. The waterproofing warranty lasts the life of the home and transfers when you sell.
On the road
Look for the black trucks with the green wizard
Customer reviews for Basement Gurus
What Basement Gurus customers say
“I needed a drainage system for my basement and received two quotes from two other companies before I spoke with Josh from Basement Gurus. Josh presented a solution that aligned more with what I wanted vs the other companies which offered cheap shortcuts.”
“Dylan and crew were absolutely as professional as I could ask. From the consultation estimate to the completed basement was very quick. They were on time every day complete with a call before they would arrive.”
“Josh was honest and thorough about my problem and scheduled the work super fast. His crew completed the job in 2 days. They were hard, fast workers.”
“I did lots of research and many estimates and Basement Gurus was the best value for high quality. Josh and the team were kind and reasonable, and did an excellent job explaining each piece of the process.”
Where we work
Serving Williamsport and Lycoming County
From the city out to the river towns and creek valleys. Don’t see your town? Call and ask.
- Williamsport17701
- South Williamsport17702
- Duboistown17702
- Loyalsock Township17701
- Old Lycoming Township17701
- Montoursville17754
- Cogan Station17728
- Linden17744
- Jersey Shore17740
- Muncy17756
- Hughesville17737
- Montgomery17752
- Trout Run17771
- Waterville17776
Williamsport, PA 17701
(570) 989-4489
Questions Williamsport homeowners ask
My house is behind the levee. Why is my basement still getting water?
The levee holds back the river. It isn’t built to keep groundwater out of basements. Engineers who studied it in 2014 found sand and gravel underneath that carries water when the West Branch runs high, which is why it has relief wells on its dry side. When the river is up or the ground is soaked, groundwater can rise and push up through the floor and the floor-wall joint. Interior drainage to a sump pump relieves that pressure, and it’s often part of the fix on low ground. The free inspection tells you what your house needs.
Will waterproofing protect my basement in a flood like Agnes or Lee?
No. If river or creek water comes over the ground and into the house, no basement system stops it. Waterproofing handles the water that gets in the rest of the time: groundwater pushing up, seepage through the walls, and runoff after heavy rain. A battery backup keeps the sump running when a storm knocks the power out. For flood risk itself, look up your property on the FEMA flood map and talk to your insurance agent about flood coverage.
Do you serve my town?
We serve Williamsport and Lycoming County, including South Williamsport, Montoursville, Loyalsock, Jersey Shore, Muncy, Hughesville, Montgomery and Linden. If your town isn’t listed, call (570) 989-4489 and ask.
Can an old stone foundation be waterproofed?
Yes. Stone and brick foundations can’t be sealed like poured concrete, so instead we manage the water: interior drainage at the base of the wall, a sump pump, and a vapor barrier on the walls. If a wall is bowing, we stabilize it first.
Water only shows up after heavy rain. Is that a waterproofing problem or a drainage problem?
It can be either one, and often it’s both. Clogged gutters, short downspouts and ground that slopes toward the house send rainwater straight to the foundation. Sometimes fixing the outside is enough. If water is already coming through the walls or floor, you’ll also need interior drainage. The free inspection tells you which, and we only quote what you need.
What does the free estimate include?
We inspect inside and out, find where the water or damage is coming from, photograph it, and give you a written scope with a fixed price. You don’t pay anything for the estimate and you’re under no obligation.
Let’s get your Williamsport basement dry.
Free estimate, no money down, financing available, and a waterproofing warranty that stays with the house when you sell it.