Grymes Hill Retaining Walls on the North Shore Slopes
A serpentinite hill above the harbor, a zoning district written for steep lots, and a 2026 Local Law 37 deadline for the walls along its winding streets.
NYC Retaining Walls is a licensed and insured retaining wall contractor that builds and repairs retaining walls on Grymes Hill and the surrounding North Shore: Silver Lake, Ward Hill, Sunnyside and St. George. This is the second most active area for retaining walls in the city: the West New Brighton–Silver Lake–Grymes Hill neighborhood ranks #2 of 262 citywide, and ZIP 10301 ranks #2 of 178, with 55 permitted wall jobs, 68 properties with an inspector-confirmed wall problem and 75 Local Law 37–cited lots since 2015 (NYC Open Data).
- Local Law 37 window
- Jan 1 – Dec 31, 2026 (open now)
- Terrain
- Serpentinite hill; Special Hillsides district
- Most common jobs
- Homeowner hillside walls, multifamily LL37 walls
- Site visit
- Within 3 business days
Common retaining wall problems on Grymes Hill.
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Your LL37 report is due this year
Staten Island's Cycle 3 window closes December 31, 2026. Late filing costs $1,000 a month on top of $5,000 a year for failure to file.
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The zoning district adds a step
On lots with an average slope of 10% or more, the Special Hillsides Preservation District rules can apply before DOB will permit a new wall.
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A street-front wall is tipping
Tall walls hold houses and apartment buildings above winding streets. Lean, bulges and open joints at the sidewalk are LL37 problems as well as structural ones.
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Runoff is coming straight down
Hillside lots send stormwater at the wall. Blocked weep holes turn a soil-retaining wall into a dam.
Retaining wall services on Grymes Hill.
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Hillside Retaining Walls
Terraced and tall walls for steep lots, including Special Hillsides and Natural Area District sites. -
Retaining Wall Inspection
Local Law 37 compliance: we coordinate an independent QRWI, prepare the wall, and handle required repairs. -
Retaining Wall Violation Repair
SREM and Unsafe ratings, DOB violations and complaints — repairs scheduled against your deadline. -
Stone Retaining Walls
Natural stone and fieldstone walls built and restored — repointing, resetting and matching old stone. -
Retaining Wall Drainage Repair
Weep holes, perforated pipe and clean-stone drainage zones that take the water pressure off the wall.
How we handle a Grymes Hill hillside job.
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Call or send photos
Tell us the street and what the wall is doing. Grymes Hill visits are scheduled in blocks to keep travel off your bill.
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Free site visit
Measured height, length and lean, a crack map, a drainage check and a DOB records lookup for the lot.
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Written scope and price
Repair, stabilize or rebuild, with engineering, permit and any zoning-district review spelled out.
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Build and closeout
Clean site, before-and-after photos, and the paperwork your inspector or insurer will ask for.
Why Grymes Hill walls come with paperwork.
Grymes Hill rises above the North Shore on the same serpentinite bedrock as Todt Hill, with Ward Hill and Silver Lake on its flanks and Wagner College on its crown. The buyer mix is wider than mid-island: in ZIP 10301, 56% of permitted wall jobs were on one- to three-family homes, and the rest were apartment buildings, co-ops and institutions on the slopes down toward St. George (NYC Open Data). The LL37-cited walls cluster on a few streets, chiefly Skyline Drive, Hygeia Place and Howard Avenue, where tall walls hold houses and buildings above the roadway. Those walls, 10 feet or taller and fronting a public right-of-way, are inside Staten Island's open window and need a Qualified Retaining Wall Inspector's report by December 31, 2026.
The zoning is the other Grymes Hill factor. The Special Hillsides Preservation District, created in 1987 to reduce erosion, landslides and stormwater runoff on the North Shore hills, covers much of this area. Lots with an average slope of 10% or more fall under its rules (ZR §119-20), and on those lots regrading and new walls can need City Planning review before DOB will issue a permit. Then the DOB rule applies as everywhere: walls 4 feet or taller from the top of the footing, or any wall with a surcharge, need a permit with plans by a PE or RA. We check the zoning map and slope for the lot before we price, so the schedule shows any review time. See our hillside retaining walls service for how terraced walls are designed on lots like these.
Open Grymes Hill in Google Maps ↗ Why Grymes Hill owners call NYC Retaining Walls.
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Retaining walls are the focus
Site visits, estimates and repairs here are about one thing: walls that hold back soil — how they're drained, footed, reinforced and filed.
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Numbers on the first visit
Measured height, length and lean, a crack map and a DOB records check — not a guess from the curb.
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A written, line-item price
Repair, stabilize or rebuild, priced side by side, with engineering and permit steps spelled out.
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Licensed and insured
Licensed and insured for home improvement work in New York City, and we build to stamped plans when the code calls for them.
How we reach you on Grymes Hill.
From 27 Knickerbocker Ave in Brooklyn we take the BQE and Gowanus Expressway to the Verrazzano-Narrows Bridge, then leave the Staten Island Expressway at the Clove Road and Richmond Road exits for Howard Avenue and Victory Boulevard. North Shore visits are booked in blocks with the rest of Staten Island, and every Grymes Hill property gets a site visit within 3 business days of your call.
Grymes Hill neighborhoods we cover
- Grymes Hill
- Silver Lake
- Ward Hill
- Sunnyside
- St. George
- West New Brighton
- Stapleton
Near landmarks like
- Wagner College
- Silver Lake Park
- Serpentine Art & Nature Commons
- Clove Lakes Park
- Snug Harbor Cultural Center
- St. George Ferry Terminal
Routes we use
- Verrazzano-Narrows Bridge (I-278)
- Staten Island Expressway (I-278)
- Howard Avenue
- Victory Boulevard
- Clove Road
Transit: Staten Island Railway and the St. George Ferry Terminal.
Grymes Hill retaining wall questions.
How much does a retaining wall cost on Grymes Hill?
Published Staten Island figures put installed walls at about $21 to $64 per square foot of wall face (homeblue), and HomeAdvisor's Staten Island average is about $6,000. Grymes Hill walls tend to sit at the high end because they are taller, often need engineering and a DOB permit, and can involve rock excavation. Our NYC working band for a rebuild is about $90 to $160 per linear foot.
Is my lot in the Special Hillsides Preservation District?
Many Grymes Hill, Ward Hill and Silver Lake lots are. The district covers much of the North Shore hills, and its rules bite on lots with an average slope of 10% or more. On those lots, regrading or building a new wall can need City Planning review before DOB issues a permit. We check the zoning map for your lot before we price the job.
Our Grymes Hill building has a tall wall on the street. Is it covered by Local Law 37?
If any part of it is 10 feet or taller and it fronts a public right-of-way, such as a sidewalk, street or public stair, yes. Height is measured from the ground in front of the wall to the top, including any fence that holds back material. The 2026 report must be filed by a Qualified Retaining Wall Inspector within 60 days of the inspection, and the window closes December 31, 2026.
Who pays for a wall between two Grymes Hill lots?
A wall on the common lot line is the joint responsibility of both owners, half each (Admin Code §28-305.1.1). A wall entirely on one lot is that owner's, and the neighbor must allow access for repairs. If one owner cut or filled the slope, that owner builds and maintains the wall at their own cost (§28-305.2). A licensed survey settles where the line is.
Book a free Grymes Hill site visit
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Callback within 1 business hour. If it's urgent, call (718) 555-0100.
Nearby service areas.
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Todt Hill
The city's #1 neighborhood for wall work: driveway, terraced and stone walls on the ridge.
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Staten Island
Hillside, driveway and timber-replacement walls, and the 2026 Local Law 37 window.
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Brooklyn
Rowhouse rear-yard walls, subway-cut walls, and the ridge from Green-Wood to Bay Ridge.
Retaining wall work on Grymes Hill?
We call you back within 1 business hour during business hours (Mon–Sat, 7am–7pm) and schedule a free site visit within 3 business days.