Your rental application is approved, you’ve paid your rental fees, and you’re all set to move into your new apartment. The thought of choosing new furnishings, exploring a different neighborhood, and starting your life’s next chapter is exciting.
But before you’re ready to settle into the new apartment, there’s one important thing you need to do: update your address for mail, official documents, magazine subscriptions, and more.
While you can use different formats for everyday situations, it’s a good idea to understand how to write an apartment address in the USPS format. It helps prevent delayed deliveries, lost packages, and returned mail.
Here’s your handy guide on how to write an apartment address the USPS way and common mistakes you should avoid.
The Standard USPS Apartment Address Format
The United States Postal Service (USPS) outlines clear guidelines on how to write an address with the recipient’s name, apartment number, and other details.
The standard apartment address format, as defined by USPS, includes three lines:
- Line 1: Recipient name
- Line 2: Street address + Apartment/Unit number
- Line 3: City + State + ZIP
Street address includes the street number, predirectionals (if any), street name, and street suffix (ST). Unit number includes the secondary designator (APT/UNIT) followed by the number.
USPS guidelines require the street address and apartment number to be written on the same line. It’s because the third line is typically reserved for special designators like “care of” or handling instructions.
Also, keep in mind that USPS prefers all caps and no punctuation, such as commas and periods, in the address. Writing a mailing address according to these guidelines ensures faster, error-free processing.
Apartment Address Examples by Situation
While it’s crucial to know how to write an apartment address the USPS way, remember that the same address can look different depending on the situation.
For instance, a standard USPS address will look like:
JANE SMITH / 123 MAIN ST APT 4B / DENVER CO 80202
This format is ideal for mail, subscriptions, government forms, bank accounts, and utilities. It helps mail sorters process packages quickly and accurately.
On the other hand, for everyday situations like grocery deliveries, you can use a casual format:
Jane Smith, 123 Main Street, Apt 4B, Denver, CO 80202
The casual format also works for job applications, email signatures, and online shopping checkouts.
If a friend, family member, or acquaintance wants to mail you from overseas, they’ll need to use the international recipient format:
Jane Smith / Apt 4B, 123 Main Street / Denver, CO 80202 / United States
Notice that the international recipient format includes the “United States” or “USA” on the last line.
The address format also changes when you fill out different online forms. For instance, if you’re filling a rental application online, the form can include separate fields for street, apartment, city, state, and ZIP. These fields may be spread across multiple lines.
How to Write Addresses with Apartment Numbers
Once your application for an apartment goes through, knowing how to write an address with an apartment number becomes crucial. You’ll need it for mail, government forms, online deliveries, and many other reasons.
USPS guidelines require you to put the apartment number on the same line as the street address using one of these designators:
- APT (Apartment) – 123 MAIN ST APT 4B
- UNIT (Unit) – 123 MAIN ST UNIT 3A
- STE (Suite) – 123 MAIN ST STE 2C
You can also use the pound sign (#) for the apartment number but make sure you include a space between the symbol and the unit number.
While the pound sign is acceptable, USPS recommends that you use a suitable designator like APT or STE whenever it’s known.
The USPS-preferred format is with abbreviations (APT, STE, or UNIT) and without punctuation (comma or period) between the street address and apartment number.
But how to write an address apartment number when you also need to include the building number?
Simply add the building number with the BLDG designator between the street address and apartment number.
Example: 123 MAIN ST BLDG 2 APT 5B
USPS-Preferred Abbreviations
Understanding the use of abbreviations is a key aspect of learning how to write an apartment address. USPS prefers abbreviations in all caps and without periods.
Commonly used abbreviations in the USPS address format include:
- APT (Apartment)
- BLDG (Building)
- FL (Floor)
- RM (Room)
- STE (Suite)
- UNIT (Unit)
While “Unit” doesn’t have an actual abbreviation, it still serves as a crucial secondary address designator.
It’s worth noting here that using abbreviations in an apartment address is technically optional. Your mail will be delivered, even if the address includes the full spelling. However, USPS recommends abbreviations for faster sorting.
When the Apartment Number Won’t Fit on One Line
If you ever come across situations where the apartment number doesn’t fit on one line, there’s no reason to worry. USPS allows the apartment number on a separate line above the street address.
Example: JANE SMITH / APT 4B / 123 MAIN ST / DENVER CO 80202
But remember that this is the second-preferred format. The single-line address format still gets more priority.
When filling forms, use a form field separator like “Apt: ______”, if available, to make the address easier to process.
How to Write an Address for an Apartment: Driver’s License Edition
Updating your correspondence address in official documents like a driver’s license should be a priority when moving into a new apartment. But how to write an address with apt for a driver’s license?
The good news is that DMV forms usually have designated fields for different elements of an apartment address. You just have to fill in the accurate details in the right fields.
The street address goes in a field labeled “STREET ADDRESS,” while the apartment number goes in another field “APT/UNIT # or FLOOR #.” Similarly, you’ll find other fields labeled “CITY/TOWN,” “STATE,” and “ZIP CODE” on the form.
Keep in mind that DMVs verify apartment addresses against USPS deliverability. Make sure the address in your lease and the mailing address in the DMV form match.
How to Write a Mailing Address for International Senders
Understanding how to write an apartment address in USPS format becomes particularly important when someone needs to mail you from overseas.
You may have ordered furnishings for your new apartment from an international e-commerce store. Or a friend from another country might want to send you a housewarming gift. Perhaps you may have signed up for a magazine subscription abroad.
Regardless of purpose, for international senders, the USPS-preferred address format includes a fourth line with “United States” or “USA.” Everything else remains the same.
Example: Jane Smith / Apt 4B, 123 Main Street / Denver, CO 80202 / United States
Make sure the address is written using English or Latin characters even if the sender’s country uses a different alphabet.
Keep in mind, though, that international postal services may have specific format requirements. It’s always a good idea for the sender to confirm the format with their local postal service before writing the address.
Apartment Address Mistakes That Cause Lost Mail
When you’re writing your apartment address, you should also keep an eye out for common mistakes that cause delays and lost mail. These include:
- Missing apartment number (the most common error)
- Wrong ZIP code
- Abbreviated city name
- Missing predirectional (N/S/E/W) on the street name
- Illegible handwriting
When the address is missing key elements, includes incorrect/incomplete details, or isn’t written neatly, it will become undeliverable. In most cases, USPS will return the mail to the sender.
The best way to avoid these mistakes is to confirm the format using a USPS address verification tool available online. Printing the address label also helps mail carriers process your package and ensure timely delivery.
Updating Your Address When You Move Into an Apartment
Moving into an apartment involves more than unpacking boxes and settling into your new space. You should update your address with all relevant organizations as soon as possible to avoid missed deliveries and important correspondence.
Start by submitting a USPS Change of Address request and setting up mail forwarding. USPS forwarding typically covers First-Class Mail for up to 12 months, so you get time to update your information with individual senders.
It’s a good idea to set up mail forwarding 7 to 14 days before your move-in date to ensure a smooth transition.
Next, update your address with your state’s DMV, voter registration office, bank, credit card providers, employer, insurance companies, subscription services, and magazine publishers.
Some states have legal deadlines to update your driver’s license and voter registration within a specific duration after moving, so don’t wait too long.
Taking care of these updates early helps you avoid lost mail, missed bills, and unnecessary administrative headaches.
Frequently Asked Questions About Apartment Addresses
Is it Apt or # for apartment number?
USPS recommends using APT before an apartment number. While the pound sign (#) is also acceptable for apartment numbers, it’s the second-preferred format.
Do I need to include the apartment number for delivery?
Yes. The apartment number helps mail carriers locate the specific unit within a building. If the mailing address doesn’t include the apartment number, there’s a good chance the mail will be returned to the sender.
How do I write a 4-line apartment address?
The standard USPS apartment address format includes three lines. If you can’t fit the street address and apartment number on the second line, you can add the apartment number on a separate line above the street address. The fourth line is reserved for the country name.
What if my building doesn’t use Apt numbers?
If your building doesn’t use apartment numbers, use whatever secondary address designator the property assigns. It can be a unit, floor, room, suite, or building number. If a secondary designator isn’t available, use the street address and building name given by your landlord or property manager.
Can I use Unit instead of Apt?
Yes. You can use both APT and UNIT as the secondary address designator, depending on what’s recognized by your landlord or property manager. Including the correct unit identifier helps ensure your mail and packages reach the right residence.
How do I write my address for online forms?
Most online forms provide separate fields for your street address, apartment or unit number, city, state, and ZIP code. Enter each part of your address in the appropriate field instead of combining everything into one line. If there’s a dedicated “Apt,” “Unit,” or “Suite” field, use it for your apartment number. If not, include the apartment number after the street address, such as “123 Main St Apt 4B.”
