USPS-Approved Mailboxes in Illinois
Cluster & Pedestal Multi-Family Options
U.S. Mail Supply ships USPS-approved multi-family mailbox
solutions to construction projects across Illinois. We offer trusted
options for multi-unit housing projects and new developments, including
durable CBUs, pedestal-mounted mailboxes and other centralized units.
All models meet USPS standards for secure, centralized mail delivery. Be
sure to check with your postmaster about installation requirements.
Mail Package Drop
Mail Package Drop/Mail Chest In-Ground Pedestal
Florence 8 Tenant Cluster Mailbox (CBU) Traditional Decorative w/ Pedestal #1570-8V2
Available Finish options
Postal Grey
Dark Bronze
Black
White
Forest Green
Sandstone
Florence 4 Unit Outdoor Parcel Locker w/ Pedestal #1590-T2
Available Finish options
- Postal Grey
- Dark Bronze
- Black
- White
- Forest Green
- Sandstone
Florence 16 Tenant Cluster Mailbox (CBU) w/ Pedestal #1570-16
Available Finish options
- Postal Grey
- Dark Bronze
- Black
- White
- Forest Green
- Sandstone
Front-Loading Horizontal Mailboxes – 35 Doors
Available Finish options
Anodized Aluminum
4-Door 3500 Series Vertical Mailbox
Available Finish options
- Sandstone
Bronze
Aluminum
Double Letter Locker Collection Box-Front Access
Available Finish options
- Black
- White
Tan
Gray- Bronze
Multi-Family Mailboxes for New Property Developments in IL
Illinois’s growing multi-family housing market requires secure, reliable mail delivery systems. USPS-approved mailboxes offer convenient access for residents while complying with postal regulations in new developments.
U.S. Mail Supply provides dependable mailbox systems suited for apartments, townhomes and condominiums. Our cluster and pedestal mailboxes deliver long-term durability and straightforward installation.
U.S. Mail Supply Has Multi-Family Mailbox Solutions For
- Apartment Complexes
- Condominiums
- Townhome Communities
- Student Housing
- Senior Living Facilities
- Military Housing
- Public Housing Authorities
- Mixed-Use Developments
- Affordable Housing Projects
- Property Management Companies
- Real Estate Developers
- New Multi-Family Construction Projects
- Renovation & Retrofit Projects
- HOAs (Homeowners Associations)
- Section 8 and Government-Sponsored Housing
Requirements for Multi-Family Mailboxes in IL
Mailbox regulations in Illinois are primarily governed by the United States Postal Service (USPS) standards, local municipal codes and specific requirements for multifamily dwellings.
It’s essential to consult with local authorities or the local postmaster to comply with any additional regulations or standards specific to your area.
USPS Mailbox Requirements
Placement and Height
Mailboxes in Illinois must be installed 6 to 8 inches back from the curb or road edge, with the bottom of the mailbox or mail entry point positioned 41 to 45 inches above the ground or road surface.
Address Visibility
Each mailbox must clearly display the address number, with numerals at least 1 inch high, placed on the front or flag side for visibility.
Cluster Box Units (CBUs)
For new construction or major renovations, USPS requires the use of STD-4C Horizontal Mailboxes or Cluster Box Units (CBUs). The highest tenant lock must be no more than 67 inches above the finished floor and the lowest must be at least 28 inches above the finished floor.
Parcel Locker Ratio
In multi-family housing, there must be at least one parcel locker for every five mailbox compartments in new installations.
Illinois-Specific Mailbox Requirements
Mailbox Supports
The Illinois DOT requires mailboxes to be mounted on breakaway wood or steel posts, such as a 4×4 wooden post or a 2-inch diameter steel pipe. Posts should be securely set no more than 24 inches into the ground. Rigid or decorative posts are not allowed due to safety concerns.
Locking & Parcel Delivery
Locking mailboxes are permitted as long as they are USPS-approved. Slots must accept standard mail and unfolded Priority envelopes. In centralized STD-4C installations, USPS requires one parcel locker for every five tenant compartments.
Mailbox Placement
Curbside mailboxes must be installed 41–45 inches above the road surface and placed 6–8 inches back from the edge of the pavement. Boxes must face the street and display the correct house number for identification.
ADA Compliance
Multi-family mailbox installations must follow ADA reach range standards. At least one tenant compartment must be no higher than 48 inches from the finished floor. Parcel lockers must be mounted at least 15 inches off the ground and USPS master locks should fall between 36–48 inches.
Requirements by Property Type
Site-Constructed Single-Family Developments
Developers must coordinate with the USPS during the design phase, as centralized mail delivery with secure parcel lockers is the standard for new communities. If new homes are within one block of existing ones, they may adopt the same delivery method pending USPS review; otherwise, current centralized delivery standards apply.
Mobile or Trailer Home Developments
Apartment Communities
Use USPS-approved 4C centralized mailbox units with at least one parcel locker per five mailboxes, installed near main entrances and accessible to carriers. Outdoor units require USPS approval, must avoid streets or sidewalks and include a canopy with lighting and weather protection.
Student Housing & Off-Campus Dormitories
USPS delivers mail in bulk to a designated representative for distribution within dormitories, with no individual mailbox delivery provided. Dormitories—defined by shared living spaces—require early coordination with a USPS Growth Manager and may need named designees to accept mail.
*See the USPS National Delivery Planning Standards: A Guide for Builders and Developers for more information.
Fastest Growing Multi-Family Property Investments in Illinois
Illinois’ multi-family market remains active, with steady growth
centered in and around Chicago. High construction volume, increased
demand for rental housing and continued urban investment have kept
Chicago among the leading metros for apartment development in the
Midwest. Transit-oriented projects and adaptive reuse of historic
buildings are driving new construction in both downtown and suburban
areas. Beyond Chicago, regional hubs like Rockford and
Champaign-Urbana are also seeing an uptick in development tied to
university growth and local economic expansion.
Other Illinois cities are also making significant strides in the multi-family sector:
- Chicago-Naperville-Elgin continues to lead the state in new apartment construction, ranking among the top 15 metros nationwide in annual deliveries.
- Rockford is experiencing revitalization with new residential and mixed-use developments focused on its downtown corridor.
- Champaign-Urbana benefits from stable housing demand driven by the University of Illinois and associated research sectors.
As multi-family construction expands across Illinois, U.S. Mail Supply provides developers and property managers with USPS-compliant mailbox systems meeting the needs of today’s high-traffic residential properties.
Top Multi-Family Property Management Firms in IL
Illinois’s multi-family property management sector thrives around the Chicago metro, with increasing investment in both urban and suburban rental properties. U.S. Mail Supply delivers secure, USPS-approved mailbox systems statewide, ranging from cluster box units in dense city high-rises to pedestal-mounted options in suburban neighborhoods. USPS-approved boxes help with efficient and reliable mail delivery for residents.
Medallion Property Management
Medallion specializes in multi-family buildings throughout Chicago’s South and West sides. They offer comprehensive services including leasing, tenant screening and in-house maintenance tailored to owner and tenant needs.
McCaffery Interests
McCaffery oversees a portfolio of Class‑A multi-family and mixed-use communities across the Chicagoland area. Their full-service approach covers property leasing, management, maintenance and strategic capital enhancements.
Choose U.S. Mail Supply for Your Multi-Family Mailbox
- USPS Compliance Guaranteed
- Constructed With High-Quality Materials
- Custom Design & Sizing Options
- Nationwide Delivery Network
- Woman-Owned Business
- Installation Support
- USPS & Unit Quantity Guidance
- Volume Discounts
- Solutions For Every Multi-family Property Type
Equip your multi-family development with the best USPS-approved mailboxes in Illinois. Contact U.S. Mail Supply today for a consultation and to explore our range of cluster, pedestal and other mailboxes for multi-family properties.
USPS-Approved Mailbox FAQ
Where can I buy mailboxes in Illinois?
USPS does not sell mailboxes. In Illinois, USPS-approved mailboxes can be purchased from U.S. Mail Supply, hardware retailers and specialty vendors. Residential, commercial, wall-mounted and centralized options are available.
What mailboxes are approved by USPS in Illinois?
Any mailbox marked “Approved by the Postmaster General” and “U.S. Mail” meets federal USPS standards. Local governments may have extra requirements, so contact your local post office before installing.
How do I get a new mailbox in Illinois?
Buy a USPS-approved mailbox and follow USPS installation standards. Confirm placement, construction and size rules for new installations or mailbox replacements.
Can I customize my mailbox in Illinois?
Yes, if the custom mailbox design meets USPS size and visibility rules. Approval from the local postmaster is required before installing a custom mailbox.
How do I install my Illinois mailbox?
Install curbside boxes 6–8 inches from the curb and 41–45 inches from the ground. Use sturdy posts buried less than 24 inches deep. Wall-mounted and centralized mailboxes, like STD-4C or CBUs, must comply with USPS and ADA guidelines.
Can I get private mail delivery in Illinois?
Yes. UPS, FedEx and Amazon deliver in Illinois, but only USPS can use official mailboxes. Add a separate delivery box for non-postal services.
Can a Illinois property owner create a custom mail service?
Businesses, universities and multi-family buildings can create custom centralized mail services if they meet USPS STD-4C and ADA regulations. All units must follow safety and access standards.
USPS-Approved Mailboxes for Illinois Multi-Family Properties In:
- Chicago
- Aurora
- Joliet
- Naperville
- Rockford
- Springfield
- Peoria
- Elgin
- Waukegan
- Cicero
- Champaign
- Bloomington
- Decatur
- Evanston
- Schaumburg
- Bolingbrook
- Palatine
- Skokie
- Des Plaines
- Orland Park
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