Basement Waterproofing Cost in Schenectady

Interior perimeter systems run $70 to $115 a linear foot here. Crack injection is $400 to $950. Stone wall repointing with drainage lands between $2,000 and $12,000 depending on how much wall is failing. Every line item is below, along with what moves the number and how to read a quote you already have.

(518) 617-4320

We'll give you a usable range on the phone before anyone visits.

Full price table
Why the ranges are wide
The stone premium
What moves your number
Reading a quote
Cheapest real fixes
Questions

Every price, in one table

Installed prices for Schenectady, Niskayuna, Rotterdam, Glenville and the surrounding towns in 2026, including materials, labor and cleanup.

Work	Typical range	What you get
Downspout extensions	$150–$650	Above-ground extensions carrying roof water 8–10 ft out. Highest value per dollar on this page.
Buried downspout leaders	$650–$2,400	Solid pipe, buried, daylighted or to a dry well. Survives the mower.
Regrading	$450–$2,600	Rebuilding positive slope, roughly 6 in of fall over 10 ft.
Window well drain + cover	$300–$950 each	Gravel-and-drain retrofit plus a clear cover.
Crack injection, poured wall	$400–$950 per crack	Epoxy for structural, polyurethane for active leaks. Two hours.
Repointing, stone or block	$40–$95 per sq ft	Raking out failed mortar and repacking. The core Schenectady repair.
Interior parging, stone wall	$1,200–$4,500	Cementitious coat over a repointed wall. Cosmetic and protective, not waterproofing.
Sump pump replacement	$550–$1,250	New pump into a serviceable pit, new check valve, discharge checked.
New sump pit + pump	$900–$2,700	Cutting the slab, sealed liner, pump, sealed lid, discharge routed away.
Battery backup pump	$950–$1,900	Second pump, deep-cycle battery, alarm. See the FAQ on why this matters here.
Interior perimeter system	$70–$115 per ft	Floor cut, drain tile in washed stone, drainage board, slab edge re-poured, tied to a sump.
— typical whole basement	$4,200–$12,000	Most basements here run 60–120 linear feet.
— one wall only	$1,900–$4,400	Legitimate when water only ever appears on one side.
Exterior excavation + membrane	$160–$360 per ft	Dig to footing, clean, membrane, dimple board, footing drain, backfill, regrade.
— one wall, average depth	$6,500–$15,000	Access is the biggest single variable.
Carbon fiber straps	$550–$950 each	Usually every 4–5 ft along a bowing wall.
Steel I-beam bracing	$750–$1,400 each	For walls past what carbon fiber can hold.
Wall rebuild	$16,000–$45,000+	Genuine last resort. Get an engineer and a second opinion.
Basement dehumidifier	$1,200–$2,700	Ducted, condensate plumbed to the sump. Handles humidity, not liquid water.
Elevating mechanicals	$1,500–$6,000	Raising furnace, water heater and panel above expected flood level.

Holding a quote that doesn't match these numbers? Read it to us and we'll tell you whether it's fair. Call (518) 617-4320.

Why the ranges are wider here than elsewhere

In a subdivision of poured-wall houses from 1985, a waterproofing contractor can quote within ten percent over the phone. Schenectady doesn't work like that. On a single street you may have an 1890s rubble cellar, a 1925 block foundation, and a 1960s poured wall, each of which fails differently, takes different materials, and prices differently.

So a wide published range is honest and a narrow one usually isn't. What we can do is narrow it fast: tell us the decade the house went up, what the wall is made of, and roughly how many feet of perimeter, and the range tightens considerably before anyone gets in a truck.

What the per-foot price buys: slab edge cut and removed, pipe bedded in washed stone beside the footing, drainage board up the wall, and the trench re-poured flush.

The stone premium

Interior drainage along a rubble foundation costs more per foot than the same work against a poured wall, and it's worth understanding why so the difference doesn't read as padding.

The footing is irregular or absent. On a poured wall the crew digs to a known, level footing. On rubble they're following whatever the 1890s mason left, which means hand work and slower going.
The wall can't be undercut. Excavating beside a rubble wall risks pulling stone out of the bottom course. It gets done carefully, in shorter runs, sometimes with temporary support.
Mortar is usually failing too. Nine times out of ten a leaking stone wall also needs repointing, and doing that while the floor is open is far cheaper than coming back.
Nothing is square. Wall thickness varies, the floor isn't level, and neither is the footing line. Everything is cut to fit.

Expect roughly 15 to 30 percent above poured-wall pricing for interior work on rubble. Any contractor who quotes a 130-year-old fieldstone cellar at the same per-foot rate as a 1990s poured basement either hasn't looked closely or intends to renegotiate mid-job.

The six things that move your number

Linear feet. The dominant variable on any interior job. Pace your perimeter before you call and you can sanity-check every quote you receive.
What the wall is made of. Poured is most predictable, block next, rubble slowest and dearest.
Access. A bulkhead versus a narrow turning staircase swings an interior job by a thousand dollars in labor. For exterior work, whether a machine can reach the wall decides everything — and on the tighter city lots in the Stockade and Central Park, frequently it can't.
What's in the way. Finished walls, a workshop, decades of storage, a furnace on the wrong wall.
Discharge routing. The sump has to put water somewhere sensible and frost-safe. A long run adds a few hundred dollars and prevents a January failure.
Depth. A full eight-foot cellar costs more to work around than a shallow one, and this city has both.

How to read a quote you already have

Is the linear footage stated? If an interior quote doesn't say how many feet of drain you're buying, it can't be compared to anything. Ask.
Where does the discharge terminate? "To the exterior" isn't an answer. Ten feet out, downhill, not toward a window well or the neighbor's lot.
Does the warranty cover the wall or only the system? On old masonry this distinction matters enormously, and it's usually buried. Read it, and check whether it transfers on sale.
Is the price still good next week? A discount that evaporates when the salesperson leaves your kitchen isn't a discount. It's the oldest tactic in this trade and it's a reason to get another quote.
Who is actually doing the work? Several of the larger names quoting in this county are dealers within a national franchise network, working from a corporate product catalog. That isn't automatically bad, but you should know whether you're buying a system or a diagnosis.

The cheapest fixes that genuinely work

Clean the gutters twice a year. Free, and the single most neglected item on the list.
Extend the downspouts. $150–$650. One downspout at the wall delivers thousands of gallons a year exactly where you least want them.
Fix the grade at the corners. $450–$2,600. A century of settlement tips soil back toward the house; corners fail first.
Cover the window wells. $300–$950 each. An open well is a bucket set in the ground beside your foundation.
Add a battery backup. $950–$1,900. Read the FAQ below before deciding this is optional.

Cost questions

Why is one quote $3,500 and another $14,000?

Usually different scopes wearing similar words. Check linear footage, check one wall versus four, and check whether one includes a new sump and discharge while the other assumes you'll reuse what's there. Where both are genuinely the same scope, the gap is often interior versus exterior — two different products at two different prices.

Is a battery backup really necessary in this area?

More than in most places, because of when our water arrives. The heaviest groundwater loading here comes with late-winter thaw and ice-jam conditions, and that is precisely when wind and ice bring the power down. A sump pump without power during a February thaw is an ornament. If you're going to economize somewhere on a quote, economize somewhere else.

Does waterproofing add resale value?

It removes a deduction more than it adds a premium. In a city where half the stock is pre-war and buyers arrive braced for a bad basement, a documented dry one with transferable paperwork takes an entire category of anxiety out of the negotiation. Think of it as protecting your number rather than raising it.

How much can I do myself?

Gutters, downspout extensions, window well covers, and swapping a failed pump into a sound existing pit — all genuinely reasonable, and we'll talk you through the pump swap on the phone at no charge. Cutting a slab, excavating beside a rubble footing, or touching a wall with horizontal cracking is not DIY territory; the failure modes are expensive and a couple of them are dangerous.

Do you charge for estimates?

No, and there's no obligation attached. We'll also give you a range on the phone first, which saves everyone an appointment if the number is nowhere near your budget.