Do I need a permit for a retaining wall in Locust Valley?

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 Locust Valley take?

Most Locust Valley 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 Locust Valley, NY

Q: How much does a retaining wall cost in Locust Valley, NY?

Most Locust Valley 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.

What it's like building a wall in Locust Valley

Locust Valley sits on the higher inland terrain of Nassau's North Shore. Gentle to moderate slopes, mostly wooded, with clay-loam soil that drains slowly. Mature trees and existing landscape features are the norm.

The Locust Valley neighborhoods we work in most: Locust Valley hamlet, Matinecock, Bayville border. 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 Locust Valley homeowners ask us about

Estate driveway walls, garden retaining walls integrated with hardscape and patio work, and replacements of decades-old fieldstone walls that have lost their courses.

// MIKE'S NOTE

We worked under Hoffman Landscapes on a Matinecock estate in 2023. Our scope was the 188 LF Nicolock Olde Greenwich wall running along an upper terrace. Owner never saw us, never had to make a decision. The architect handled all the communication. Our piece came in at $84,000, on schedule, no callbacks.

// LOCUST VALLEY NOTE Locust Valley jobs often involve coordinating with established landscape architects. We're set up to work as a sub on those projects and stay out of the homeowner's hair while the main design firm runs point.

What you actually get from us

Engineered design. We don't just stack block. Soil, slope, drainage, load. All of it.
Permits handled. Nassau 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 Locust Valley 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 Locust Valley 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.

Locust Valley retaining wall FAQ

How much does a retaining wall cost in Locust Valley? Most Locust Valley 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.