Snow removal for Westchester driveways and lots

• Driveway plowing, including the apron the town plow closes back up
• Walkways, steps, stoops and entrances cleared by hand or blower. A plow does not do steps
• Commercial lots plowed and stacked, fire lanes and dumpster approaches kept open
• Sidewalk runs along a commercial frontage
• Salting and sanding on cleared surfaces, matched to the temperature
• Pre-treating ahead of a forecast storm where it is worth doing
• Return passes through a long storm instead of one push after it ends

For commercial properties, our guide to commercial snow contracts covers response windows, ice management and service records.

That is the question behind every snow contract, and it has a real answer. We pulled ten winters of daily snowfall from two NOAA stations in northern Westchester, South Salem in Lewisboro (9 complete winters) and Shrub Oak in Yorktown (8), and counted each snowfall (consecutive snowy days, added together).

The two stations agree on the storms that matter (about 4 plowable snowfalls a year) and differ on the small ones, which is normal for light amounts measured at different spots and by different observers.

Both are reasonable arrangements, and which is better depends on a winter nobody can see in October. The table above is the closest thing to a forecast: about 4 plowable snowfalls in a typical winter, as few as 1 and as many as 10 at these stations.

A seasonal contract usually fits if:

• You need the drive open every time, for work, school or a medical reason, and want a fixed spot on the route. Per storm work gets fitted in around contracted accounts.
• The property is commercial, with a lot, fire lanes and walks that have to be open before the business day.
• You would rather know the winter's cost in October than find out in March.

Per storm usually fits if:

• You can wait a few hours after a storm without trouble.
• You are away for part of the winter.
• You accept that in a heavy year you pay for every visit, and in a light year you pay for little.

Nelson writes either one out after a walkthrough, with the trigger depth, what happens below it, and how ice is handled. Our guide to driveway plowing cost explains what sets the number and what a cheap quote leaves out.

Every snow contract has a trigger depth: the accumulation at which the crew rolls without being called. Two inches is the usual number on a residential driveway. Commercial lots are often set lower, because a lot with an inch of packed snow is a lot people are walking on.

Below the trigger, nothing happens automatically. The counts above show how much that covers: at South Salem, every one of 9 winters had more snowfalls under 2 inches than at or over it. A half inch that glazes over is not a plow event, which is why ice treatment is written into the contract separately from plowing. If you want the property touched at every event regardless of depth, say so while we write the scope.

The trigger also resets during a storm. Eight inches over eighteen hours is not one visit. The crew works through it as it accumulates, because plowing eight inches in one pass pushes a wall of snow that does not scrape close to the surface.

Rock salt (sodium chloride) has a temperature limit, and it is pavement temperature that counts, not air. The Minnesota Local Technical Assistance Program puts its practical limit at about 15F. One pound of dry rock salt melts 46.3 pounds of ice in 5 minutes at 30F, and only 6.3 pounds in an hour at 15F. Below that, it mostly sits on the surface.

That cold is common here. Westchester County Airport recorded a median of 10 nights a season at 15F or colder from October to April (range 2 to 19), and a median of 21.5 nights at 20F or colder, 2015 to 2025. At South Salem, 41% of the snowfalls of 2 inches or more were followed within two days by a night at 15F or colder at the airport (29% at Shrub Oak). Those are the storms where more rock salt melts nothing and only puts more chloride on the surface.

Sources: Minnesota LTAP, "Pavement Temperature and Deicer Use"; Concrete Masonry and Hardscapes Association, "The Effects of Deicing Chemicals on Interlocking Concrete Pavers".

The paver industry's own guidance comes down to three things: use rock salt where it works, use as little deicer as the job needs, and get loosened snow, ice and excess salt off the surface promptly so it does not build up in the joints. Plantings along a driveway edge take it twice, as spray off the plow and as runoff at every thaw. We built a lot of these patios, walls, stoops and driveway aprons ourselves, which is a useful thing to have on the other end of the shovel. See masonry for the stone work itself.

Push a pile to the uphill side of a sloped driveway and the first sunny afternoon melts the bottom of it. That water runs across the surface just cleared, and when the temperature drops after dark it freezes into a sheet. So we stack downhill of the running surface where the grade allows, or off a side that drains away from the drive.

Piles do not go on a catch basin, because that is where the melt needs to leave, and they do not block the sight line pulling onto the road. They do not go on beds and shrubs either. A season under a salted plow pile is how foundation plantings die. If melt keeps freezing across the same spot every winter, that is a grading question as much as a snow one; see drainage solutions.

Some towns also regulate where plowed snow can go. White Plains, for example, bars private contractors from pushing snow into or across public streets and requires it to go to the rear of the property, and sets sidewalk clearing deadlines for homes and businesses. Check your own municipality's rules; they differ.

It comes down to the length and slope of the drive, turnaround room, how many feet of walk and how many steps are cleared by hand, the size and layout of a commercial lot, where snow can be stacked, the trigger depth, whether salting or sanding is included, and seasonal versus per storm. Nelson walks the property before the season and writes it out. The estimate is free.

• Snowfall: NOAA GHCN-Daily, South Salem 2.1 NW (US1NYWC0006, CoCoRaHS volunteer station, Lewisboro) and Shrub Oak (USC00307742, NWS cooperative station, Yorktown), winters July 2015 to June 2025. A winter counts only if at least 230 of its 243 October to May days have a snowfall reading: 9 winters at South Salem, 8 at Shrub Oak. A snowfall is a run of consecutive days with snow, summed.
• Cold nights: NOAA GHCN-Daily, Westchester County Airport (USW00094745), October to April, 10 seasons. This is air temperature; pavement can be colder or warmer.
• Deicers: Minnesota LTAP, "Pavement Temperature and Deicer Use"; Concrete Masonry and Hardscapes Association, "The Effects of Deicing Chemicals on Interlocking Concrete Pavers". Snow placement and sidewalk rules: City of White Plains, "Seasonal Snow Removal Guidelines".
• Limitations: two snow stations; a hilltop property may see more snow than these, a valley property less.