Licensed and insured Manhattan, Brooklyn, Queens and the Bronx Mon to Sat, 9:00 AM to 6:00 PM
(718) 468-8803

Gramercy Park Basement Waterproofing

Basement Waterproofing in Gramercy Park, Manhattan

Damp garden levels, seeping cellar walls and wet areaways in older row houses traced to the source and repaired.

  • Water source traced before any repair
  • Walls, floors and areaways sealed
  • Free on site written estimate
Licensed and insured Free on site estimates Local NYC crews
Concrete foundation slab with steel reinforcement and dowels along its edge, foundation work by Sidewalk Repair Near Me in NYC
25+ YearsLicensed and insured

Why Do Gramercy Park Garden Levels and Cellars Get Wet?

The neighborhood has no particular flood exposure beyond heavy rain, so most dampness comes from the building and its surroundings. Cracked areaway floors, failing sidewalk slabs, old porous brick and stone, and blocked drains let water reach below grade walls.

Row houses near Irving Place and Lexington Avenue often have a garden level room with an areaway in front. The areaway floor and walls hold water against the house if they are cracked or poorly pitched.

  • Cracked or tilted areaway floors
  • Clogged areaway drains
  • Crumbling mortar in cellar walls
  • Failed sidewalk slabs beside the house
  • Downspouts that empty against the wall
  • Efflorescence, the white powder on damp masonry

Tree roots near the foundation can crack drains and shift slabs. They are rarely the only factor, but they are worth checking.

Pre war co ops on the avenues have deeper basements with their own drainage. Those spaces usually involve the managing agent, and we work from the building plans where they exist.

Damp concrete wall with white mineral deposits and moss where water seeps through

Damp Walls After Every Rain?

Send photos of the wet areas and tell us when it happens. We will plan a visit.

How We Fix It

How Do You Stop Water in an Old Row House Basement?

The repair follows the source. We fix the areaway floor and drain, repoint and seal the wall, repair slabs that tilt toward the house and, where needed, add interior drainage. Fixing the outside cause first prevents sealing a wall that keeps getting wet.

Old brick and stone absorb water. Sealing their inside face alone can trap moisture and make paint peel. We choose treatments that let the wall breathe where we can.

Floors that seep from below may need repair at cracks and joints. If water pressure is steady, a drain and pump system can carry it out, as long as there is a safe place for the water to go.

We also look above the wall. A cracked sidewalk or tilted patio slab next to the house can be the real culprit.

Many of these houses share party walls, so a repair on one side should not push water toward the neighbor. We plan the drainage with that in mind.

Parged foundation base with a sealed joint where it meets the wall above, foundation work by Sidewalk Repair Near Me in NYC

What Rules and Limits Apply to Waterproofing Here?

Sewer backups need a licensed plumber and a backwater valve, which we do not install. A structural problem may call for an engineer, and DOB permits can apply to structural jobs. A DOT permit covers sidewalk work. The Gramercy Park Historic District can affect visible exterior changes.

Most waterproofing is hidden below grade. Areaway walls, railings and front paving are visible, though, and Landmarks review can apply to changes there. Confirm requirements with the city before altering anything seen from the street.

If walls bow or crack widely, an engineer should look at them before we seal. Waterproofing cannot fix a wall that is moving.

We promise no specific result. We explain what each repair is meant to do and what it cannot do, so you can decide with clear information.

Will a coating alone stop the damp?

Seldom. A coating over a live leak peels off. Fix the water source, then treat the wall.

Concrete wall with dark water stains running down from a joint

Why Us

Why Gramercy Park Owners Choose Us for Wet Cellars

Source first

We trace the water before we price anything, so you pay for the right fix.

No false promises

We say what the repair will and will not do.

Whole path covered

Areaway, slab, wall and floor can all be handled by one crew.

Nearby

Basement Waterproofing Near Gramercy Park

Nearby neighborhoods where we also waterproof cellars.

Basement waterproofing across Manhattan

FAQ

Gramercy Park Waterproofing Questions

A licensed plumber installs them. We coordinate with your plumber and handle the masonry and concrete work.

We promise no outcome. We reduce the ways water can enter and explain the limits of each repair.

Often. A cracked floor or clogged drain sends water against the house. We check it before we recommend interior work.

Our crew files the DOT permit for sidewalk work and the DOB permit when structural work calls for one. Confirm current rules with the city.

Call (718) 468-8803 and our office will schedule a no cost inspection and mail the written quote.

Free on site estimate

Dry Out Your Gramercy Park Cellar

Find the water, fix the cause and treat the walls.

Contact

Book Your Gramercy Park Waterproofing Visit

Note which walls get wet and what the weather was like. Photos of the walls and areaway are useful.

  • Free on site estimate with a written price
  • Licensed and insured, 25+ years in business
  • We handle DOT sidewalk permits
  • Serving Manhattan, Brooklyn, Queens and the Bronx

Get Your Free Estimate

Takes about a minute. No cost and no obligation.

Do you have a DOT sidewalk violation?

A photo of the damage or a violation notice helps us quote faster.

No cost and no obligation. We never share your details.