Since 2006, new construction and major renovations require
STD-4C compliant mailbox systems. What this means is that 4C horizontal
mailboxes and parcel lockers must be installed during new construction and
major renovations, pending a discussion with your local Growth Manager. These mailboxes
are flatter than previous models and incorporate stand-alone parcel locker
options. At least one parcel locker must be present for every ten tenant
compartments, but are not required for units containing less than ten tenant
compartments.
While new construction requires the use of 4C units,
mailboxes that are being replaced may be able to use 4B+ or vertical units. It’s
best to check with your local postmaster before you complete a renovation project.
What is a Major Renovation?
A major renovation occurs anytime the wall is being modified
where existing wall-mounted units are installed. In other words, if the rough
opening of the wall is being changed, this would constitute as a major renovation.
If that rough opening will be remaining the same, you are
not required to convert to STD-4C mailboxes.
STD-4C Requirements
There are certain mailbox specifications that must be met in
order for you to comply with the USPS guidelines.
·
12”W x 15”D x 3”H is the minimum size
requirement
·
1 parcel locker required for every 10 tenant
compartments
·
ADA compliant
·
Increased security requirements
·
Improved tenant compartment lock design
·
Testing requirements to see if unit is suitable for
indoor/outdoor use
You can find the full details on the USPS
website.
Residential
Applications
While the USPS prefers the most efficient mode of delivery,
not all new residential developments must comply to the centralized delivery
system standard. When building, connect with the local USPS Growth Manager to
go over the specifics of your project.
Homes being built in more rural areas, for example, are not
likely to be required to meet the CBU guidelines. There is no strict mandate
when it comes to the size of the development property, so be sure to touch base
with a Growth Manager.
The Postal Service will consider input from all parties
involved in the planning process before issuing a final decision about
mailboxes and mailbox placement.
Mailbox Approval
Email Delivery.Growth@usps.gov
to identify your coordinator and get in contact them before you finalize any of
your building plans.
The USPS will not start mail delivery until your coordinator
has approved not only the mode of delivery but the location of the mailboxes.
While they will work with you during all stages of development, we recommend speaking
with them early in the process.
