How Do I Find My Mailbox and Get Keys After Buying a Home in Austin?

Updated June 2026  •  Originally published October 2021

If you just closed on a home in Austin and you’re wondering how to get your mailbox key, you’re not alone. It’s one of those things nobody tells you at closing, and yet almost every buyer with a cluster mailbox runs into it. We figured it out the hard way when we bought our first home, so we put this guide together to save you the trouble.

Whether you’re moving into an established neighborhood, an HOA community, or a brand-new construction home, the process is a little different for each. Here’s what you need to know.

First: Find the Post Office Assigned to Your Address

Before you drive to the nearest post office, call ahead to confirm which branch handles your street. In Austin, the closest post office is not always the one assigned to your address. The lines at post offices can be long, so calling first saves you a wasted trip. You can look up your assigned post office on usps.com using your new address, or call the main USPS customer service line and ask.

Resale Homes: Visit Your Assigned Post Office

If you purchased a resale home (not new construction), here’s the process:

1. Gather your documents. Bring your Closing Disclosure — the document you signed at closing that shows the sale price and terms — and a valid government-issued photo ID. The Closing Disclosure is your proof of ownership. Renters should bring a copy of their lease showing they are the tenant at the address.
2. Complete PS Form 1094. The post office will have you fill out PS Form 1094, a short form requesting a lock change on a cluster box unit (CBU). You can download and pre-fill this form at usps.com to speed up the process. It asks for your name, address, and reason for the request.
3. USPS will rekey your mailbox. A USPS technician handles the actual lock change at the cluster box, so you don’t need to be present. Once complete, your new keys are ready to pick up in person at the post office. Budget about $20 to $50 for the rekey fee, and plan on 7 to 14 business days for the work to be done.
4. Ask about rekeying if they don’t bring it up. Some post office employees assume you already received keys from the seller and won’t automatically initiate a rekey. Ask specifically. Getting a new lock ensures you’re the only person with access to your mailbox.

HOA-Managed Neighborhoods: Check With the Association First

In some Austin-area communities, the HOA owns and manages the cluster mailbox units rather than USPS. This is especially common in master-planned communities and newer suburban developments. If your neighborhood has an active HOA, contact them before heading to the post office.

The HOA may distribute keys directly at move-in, have a locksmith they work with, or require you to submit a form before a rekey can be ordered. Getting this wrong means a second trip, so a quick call to the HOA management company first is worth it.

If you’re not sure whether your HOA manages the mailboxes or USPS does, check your HOA welcome packet or community documents. Your real estate agent can also help you track down the right contact.

New Construction Homes: Start With Your Builder

If you bought a new construction home, the mailbox key process is different. For most new builds, the builder or developer is responsible for purchasing and installing the cluster mailbox equipment serving the neighborhood, and they typically provide the initial keys to buyers at closing or at the final walkthrough.

Here’s what to do based on your situation:

If your builder provided keys at closing: You’re all set. Contact the builder’s warranty or customer service team if you need additional copies made.

If your builder did not provide keys: Contact the builder’s customer service department directly. They may still have keys, or they may need to coordinate with the HOA or USPS to complete the setup. This is common in communities still under development where the cluster box installation is newer.

If the neighborhood is still being built out: The postal address may not yet be fully set up in USPS systems. Your builder is the best starting point, and they can confirm when USPS begins servicing your address and what the key process looks like.

New construction communities in the Austin area often have dedicated community managers or HOA contacts who handle this transition. If your builder can’t resolve it quickly, reach out to the HOA management company as a second step.

Questions About Buying in Austin?

Whether it’s mailbox logistics or something much bigger, we’ve been through every part of the Austin home buying process. Check out our Austin Home Buyers guide for more tips, or browse our monthly Austin Real Estate Price Reports to stay current on the market.

If you’re actively buying or planning your next move, we’d love to help. Call us at (512) 827-8323 or email us at info@11OaksRealty.com.

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