How much does a retaining wall cost in Smithtown, NY?

Most Smithtown retaining wall projects fall between $180 and $360 per linear foot installed, including drainage and base prep. A typical 50 linear foot wall runs $12,000 to $20,000. Bigger walls, walls requiring geogrid, or walls needing an engineer's stamp run higher. We provide written itemized quotes within 5 business days of a site visit.

Do I need a permit for a retaining wall in Smithtown?

On Long Island's North Shore, retaining walls over 4 feet tall almost always require a permit, and many villages require an engineer's stamp for walls of that height. We file the permit for you as part of the job.

How long does a retaining wall job in Smithtown take?

Most Smithtown retaining wall jobs take 4 to 10 working days on site. Larger walls, tiered walls, or jobs with engineered geogrid runs longer. Permit review adds 4 to 11 weeks depending on the village or town.

Retaining Wall Contractor in Smithtown, NY — Long Island Retaining Walls

What it's like building a wall in Smithtown

Smithtown's North Shore villages (Nissequogue, Head of the Harbor) sit on dramatic terrain falling toward Stony Brook Harbor and the Nissequogue River. Soil is glacial till with sand pockets near the water.

The Smithtown neighborhoods we work in most: Smithtown Village, Nissequogue, Head of the Harbor, Nesconset. If you're in or near any of these and need a wall built or replaced, we likely know your street and the soil under it.

The walls Smithtown homeowners ask us about

Waterfront slope stabilization, large estate walls on the Nissequogue and Head of the Harbor properties, driveway walls on the river-side lanes, and erosion control on properties losing yard to the harbor.

// MIKE'S NOTE

Job in Head of the Harbor in 2023. 110 LF Nicolock Olde Greenwich tiered along a lawn that had been sliding toward the river for years. Two layers of geogrid going 7 feet back into the slope. Engineer's stamp required. Came in at $48,200. The slope hasn't moved in three growing seasons.

// SMITHTOWN NOTE Head of the Harbor and Nissequogue villages have their own building departments. Both review wall plans carefully because of proximity to the river and harbor. We design with their standards in mind.

What you actually get from us

Engineered design. We don't just stack block. Soil, slope, drainage, load. All of it.
Permits handled. Suffolk County (or your village, if applicable), filed and followed through inspection.
Real drainage. Geotextile fabric, clean 3/4 inch crushed stone, 4 inch perforated pipe, daylight outlet. Always.
Material options. Cambridge, Nicolock, natural fieldstone, or pressure-treated timber. We'll tell you the honest tradeoff for your property.
Written warranty. In writing. Not just verbally.
Licensed and insured. Suffolk and Nassau both. Current COI on hand before work starts.

How a Smithtown retaining wall job actually goes

1. Free site visit. We come out, walk the property, measure grade, take notes on drainage and access, and listen to what you want it to look like and do. Usually 30 to 45 minutes.

2. Written quote. Within 5 business days you get an itemized quote: length, height, material, drainage spec, base prep, geogrid (if applicable), permit handling, cap details, warranty terms. No one-line guesses.

3. Permit filing. If your wall needs one, we file it and chase the approval. You don't have to think about it.

4. Build. Most Smithtown walls go up in 4 to 10 working days depending on length and conditions. We clean up daily.

5. Walkthrough and warranty. We walk the finished wall with you, confirm drainage outlets are clear, hand over the written warranty.

Smithtown retaining wall FAQ

How much does a retaining wall cost in Smithtown? Most Smithtown projects fall between $180 and $360 per linear foot installed, including drainage. A typical 50 LF wall runs $12,000 to $20,000. Bigger walls, walls needing geogrid, or walls needing an engineer's stamp run higher.

Do I need a permit? On the North Shore, walls over 4 feet almost always require a permit, and many villages want an engineer's stamp at that height. We handle the filing.

How long does the job take? 4 to 10 working days on site for most jobs. Permit review adds 4 to 11 weeks depending on the village or town.

What block do you usually use? Cambridge Pavingstones (Pyzique, MaytRx, Olde English) and Nicolock (Olde Greenwich, Stonegate). For natural stone we work with local Long Island suppliers.

Retaining Wall Contractor in Smithtown, NY