To get an address for a new house, apply to your local city or county addressing authority, not the post office. Inside city limits, that’s usually the planning or building department; in unincorporated areas, it’s typically the county’s GIS office or 911 addressing coordinator. Once the address is assigned, you’ll need to register it separately with USPS, utility providers, and navigation apps before everything actually works.
Start early. Timelines run from a few business days to a couple of months depending on the jurisdiction, and utility companies, mail carriers, and emergency responders all depend on that address being in place.
Who Assigns the Address
USPS does not create street addresses for new construction. It confirms that local governments create the address and then report it to USPS for inclusion on delivery routes.1USPS. Where Can I Find New Construction and Street Address Information So your first call is to local government, not the post office.
If you’re not sure who handles addressing where you’re building, call your county government’s main line or your county appraisal district and ask to be directed to the addressing authority.
What to Gather Before You Apply
Requirements vary, but most addressing offices will ask for some mix of the following:
- Property deed or legal description, which identifies your parcel in county records and shows the assessor’s parcel number (APN).
- Plat map showing the boundaries of your lot. If the property was recently subdivided, you may need the recorded plat from the county recorder’s office.
- Site plan showing where the house sits on the lot, including the driveway and access from the road. The addressing office uses this to decide which road frontage dictates your address.
- Building permit or approved plans. Some jurisdictions won’t assign an address until a permit has been issued.
Copy the parcel number straight from the deed or the county assessor’s website. A single transposed digit can stall the application or tie your address to the wrong parcel.
Submitting the Application
Most offices accept applications in person, by mail, or through an online portal. Fees vary widely: some counties charge nothing, others charge a flat administrative fee. The form itself is usually short, focused on parcel information and the location of the structure and driveway.
Processing time is the part that catches people off guard. Some offices turn requests around in a few business days. Others require a site visit, or won’t assign an address until construction has reached a certain milestone such as a poured foundation or rough framing. Ask upfront how long the process takes so you can line it up with utility scheduling.
When approval comes through, you’ll get an official notification, typically a letter or email, with the assigned street address. Keep it. You’ll reference it when setting up utilities, registering with USPS, and updating lenders and insurers.
Getting USPS to Deliver
Having an address on the county’s books doesn’t mean mail will start arriving. The local government reports the address to USPS, but there’s often a lag before it lands in postal databases and gets added to a carrier’s route.1USPS. Where Can I Find New Construction and Street Address Information
To check whether USPS recognizes your address, run it through the ZIP Code lookup on the USPS website. If the system returns a valid ZIP Code, you’re in.2USPS. ZIP Code Lookup If it doesn’t recognize the address, call your local post office and ask for the postmaster. They can confirm whether the address has been reported and when it will be added to a route. Bring your county assignment letter.
Installing Your Mailbox
USPS won’t deliver to an address without a proper mailbox. For curbside delivery, position the bottom of the mailbox (or the mail entry point) between 41 and 45 inches above the road surface, and set it back 6 to 8 inches from the curb. The post should be a 4-by-4-inch wood post or a 2-inch-diameter steel or aluminum pipe, buried no more than 24 inches deep.3USPS. How to Install a Mailbox
If your road doesn’t have a raised curb, contact your local postmaster before installing so they can advise on placement. Getting it wrong means the carrier may skip deliveries until you fix it.
Adding the Address to Navigation Apps
New addresses can take months to appear automatically on Google Maps and similar tools. Delivery drivers, visitors, and 911 dispatchers all rely on those maps, so add yours manually.
On Google Maps, search the address. If it doesn’t come up, use the “Add a missing place” prompt, pin your location, fill in the details, and submit. Approval usually takes two to three weeks and can stretch longer. A photo of your house number or street signage helps verification. If the road itself is new and unmapped, you’ll need to submit the road first. Apple Maps offers a similar submission through its “Report an Issue” feature.
Setting Up Utilities
Electric, water, gas, and internet providers generally require an official assigned address before scheduling new construction hookups. Call several weeks ahead of when you need service. Have your assigned address, parcel number, and building permit ready.
Lead times vary. Providers already serving a new development can move quickly; rural properties may need line extensions that add weeks or months. Ask about connection fees when you call so nothing surprises you at billing.
Posting the Number So People Can Find You
Municipal codes commonly require house numbers to be at least four inches tall, made of materials that contrast with the background, and clearly visible from the street. Fire departments enforce these rules because seconds count when a crew is looking for the right house.
If the house sits far from the road, post the number at the end of the driveway as well as on the house. For properties on long access roads or shared driveways, marking the entrance matters most. Reflective numbers or a lighted sign cost very little compared to the risk of emergency responders driving past.