Keeping HOA Cluster Mailboxes Clear for USPS Delivery in Winter
November 3, 2026 · JRW Services LLC
What mail carriers need to reach cluster mailboxes after a storm, why delivery can be curtailed, who should clear them in an HOA, and how to plan for it.
In a townhouse community or apartment complex, the mail usually does not go to each front door. It goes to a bank of cluster box units, often called CBUs, set on a pad near the entrance, along an internal road, or next to a clubhouse. After a storm, those boxes become one of the most visible things on the property. When the mail does not come, residents do not call the post office. They call the board or the management office.
The fix is usually simple, but only if someone owns it.
What does USPS need to deliver to cluster mailboxes in snow?
The Postal Service puts out the same winter request every year through its local newsrooms: keep walkways, sidewalks and areas around mailboxes clear of snow and ice, including steps, porches, walkways and the street approach. A few specific points from those releases matter for a community with cluster boxes:
- The vehicle approach. For boxes served from the street, USPS asks customers to clear enough snow to allow mail trucks to approach the box, deliver the mail and drive away without danger of the need for backing. It also asks that the approach to and exit from the box be kept clear of snow and other obstacles, including trash cans and vehicles.
- Plow piles. USPS asks customers to remove snow piles left by snowplows so carriers can reach the boxes.
- Walkways and traction. Where the carrier walks to the boxes, USPS asks that walkways be cleared of snow and ice with enough traction to avoid slips, trips or falls.
- Collection boxes. Blue collection boxes on or near the property need to be kept clear so people can deposit mail and the Postal Service can collect it.
Can the post office skip delivery if the mailboxes are blocked?
Yes. USPS says delivery may be delayed or curtailed whenever streets or walkways present hazardous conditions for letter carriers or when snow is plowed against mailboxes. The Postal Service also says it curtails delivery only after careful consideration and as a last resort, and that curtailed mail is attempted on the next delivery day. That is little comfort to a resident waiting on a prescription, and missed days across a whole community end up on the next board agenda.
How snow operations block the boxes
Nobody plows a mailbox shut on purpose. It happens in a few predictable ways:
The windrow. Cluster boxes often sit right at the curb of an internal road. When a plow clears the road, it leaves a ridge of snow along the curb. If the boxes are on that curb line, every pass adds to the ridge in front of them, and the carrier's truck cannot pull up.
The convenient pile spot. A mailbox pad at the end of a road or in a cul-de-sac looks like open space to an operator at 3 a.m. Snow pushed there closes both the vehicle approach and the walk-up side.
Refreeze. A pad that was cleared but not treated can glaze over as meltwater from nearby piles runs across it and freezes overnight.
Parked cars. Residents stop at the boxes to pick up mail. If a plow cannot get close because someone parked there during the storm, the approach stays half cleared.
Whose job is it: association, contractor or residents?
Answer this in writing before the season, because it varies by property. In many associations and managed communities, the cluster boxes sit on common property that the association or owner maintains, and the governing documents or management agreement usually say who handles snow on common areas. The USPS guidance puts the clearing on customers, not carriers. So in practice the choice is between the association's snow contractor, the association's own staff, and the residents.
Leaving a shared pad to residents rarely works, because everyone assumes someone else will do it. If the boxes are on common property, it is cleaner for the association to include them in the snow scope. Check your governing documents or ask your association attorney if you are unsure who is responsible; this is general information, not legal advice.
Once it is the contractor's job, the scope should spell out:
- Which mailbox locations are included, marked on the site plan.
- Whether the scope covers the vehicle approach, the walk-up side, or both.
- Whether the pad is treated for ice, not just plowed.
- When in the storm sequence the boxes get cleared.
- What happens if a plow pass after cleanup leaves a new ridge in front of them.
Our guide for HOA boards reviewing a snow contract covers the rest of what a board should look for in a scope.
Setting up the curb approach
For boxes served from a vehicle, the carrier needs a clear lane to pull up beside the boxes, reach them from the driver's seat or a step away, and pull out forward. That means:
- The windrow in front of the boxes is cut back to the pavement, not just knocked down.
- The lane before and after the boxes is clear enough that the carrier does not have to back up.
- No snow is pushed onto the pad or against the boxes from the road side.
A plow truck can do most of this if the operator plans the pass. The last bit, right against the boxes, is a shovel or small machine job.
The walk-up side and pathways
Some cluster boxes are served on foot, from a sidewalk or a path off a parking area. Residents also walk to the boxes from their units. That path needs to be cleared to the pad, not stopped at the curb, and the pad in front of the box doors should be clear and treated so people can stand there to open their box. Some cluster units are loaded by the carrier from the front and some from the back, so it is worth checking which sides of your boxes need access. This work belongs with the walkway and sidewalk crew rather than the plow truck.
Where the snow goes instead
If the mailbox pad was the old pile spot, the pile has to move. The site plan should mark a no pile zone around each bank of boxes, on both the road side and the walk side, and name a new pile location that does not block sight lines or drainage. Our post on where snow piles go explains how we pick pile spots on a property.
Timing
Mail usually arrives during the day, after overnight plowing is done, so the boxes do not need to be first on the route, but they should be cleared and treated before the carrier's usual time. If the storm is still going, one cleanup pass during the event and a final detail pass after it is often enough. On a multi-day storm, the plan should say how often the boxes get checked.
A short note to residents helps too: do not park in front of the boxes during a storm, and do not shovel your own walk back onto the pad.
Put the mailboxes on your site plan
Mailbox access belongs on the written site plan for any HOA or multifamily property, and the service report after each event should note what was cleared. If your community has cluster boxes and you want to talk through how they fit your snow plan, call (973) 459-0074 or request a free site assessment.
Common questions
Who is responsible for clearing snow around HOA cluster mailboxes? In many associations the cluster boxes sit on common property that the association maintains, and USPS guidance puts clearing on customers, not carriers. The cleanest approach is to include the boxes in the association's snow scope. Check your governing documents or ask your association attorney if you are unsure; this is general information, not legal advice.
Will USPS skip delivery if the mailboxes are blocked by snow? It can. USPS says delivery may be delayed or curtailed when streets or walkways are hazardous for carriers or when snow is plowed against mailboxes. It describes curtailment as a last resort, and curtailed mail is attempted on the next delivery day.
How much snow needs to be cleared for a mail truck? For boxes served from the street, USPS asks that enough snow be cleared for the mail truck to approach the box, deliver and drive away without needing to back up, with the approach and exit kept clear of snow and obstacles such as trash cans and vehicles.
Should snow ever be piled next to cluster mailboxes? No. The site plan should mark a no pile zone around each bank of boxes on both the road side and the walk side, and name another pile location that does not block sight lines or drainage.
Looking for a contractor that is prepared for the worst?
That is the whole way we run. Fill out the form or call (973) 459-0074, and we will walk your property and build the plan before the first storm.