Thinking of putting in a new letterbox? Whether your current one is damaged or you’ve just moved into a new home, learning how to install a letterbox is a simple and fun DIY mailbox installation project you can do yourself. You don’t need to be an expert—just have the right tools, a bit of time, and follow the steps below. In Australia, having a secure, weather‑resistant mailbox is important. A well‑installed letterbox protects your mail from bad weather and theft, and gives your home great curb appeal, a key home improvement task many homeowners search for.
Let’s walk through installing a letterbox on different surfaces, door, wall, brick, fence, and concrete. We’ll also answer common questions to help you pick the best mailbox design, lockable mailbox, and more.
How to Install a Post Letterbox on Door
Installing a letterbox on your front door is smart if you want mail delivered directly inside. It’s great for small homes and apartments and gives a polished modern mailbox look.
Here’s what to do:
- Measure and mark the center of your door at about chest height, this ensures comfortable reach.
- Use the template from the mailbox flap kit to trace the outline.
- Carefully cut the hole using a handsaw or jigsaw, this is the precise part of your door mailbox installation.
- Insert the letterbox flap from the outside.
- Secure with screws on both sides.
- Test that the flap opens and closes smoothly.
Choose a weatherproof mailbox flap if your door is exposed to rain.
How to Install a Post Letterbox on Wall Mounted
A wall‑mounted letterbox is perfect for places without space for a post and adds a clean, stylish presence, especially as a modern wall mailbox.
Follow these:
- Select a flat wall near the entrance, easy access is key.
- Hold the mailbox and use a level so it sits straight.
- Mark screw holes with a pencil.
- Drill, insert wall plugs, and mount securely.
- Screw it in tightly.
- Test the lid, door, and lock.
This option looks neat on brick or wood surfaces, giving a crisp contemporary mailbox design.

How to Install a Post Letterbox on Brick
Brick installations offer extra durability. Use the right tools and aim for the brick, not the mortar, for a stronger hold.
Steps include:
- Choose a flat brick panel.
- Mark the mounting holes.
- Drill with a masonry bit.
- Insert plug anchors made for brick.
- Align and secure the mailbox.
This method suits a brick wall mailbox, giving both strength and a classic aesthetic.
How to Install a Post Letterbox on Fence
Fence‑mounted mailboxes let mail carriers easily drop off mail without entering your yard. Many Australians prefer a gate‑mounted mailbox for convenience.
Here’s how:
- Pick a sturdy fence spot, about 1–1.2 m high, for easy reach.
- Hold it up and mark screw locations.
- Drill or hammer in screws or use brackets.
- Slide the mailbox in and fix it tightly.
Avoid blocking it with plants or gates. This is a common wood fence mailbox option.
How to Install a Post Letterbox on Concrete
A freestanding mailbox on concrete is solid and long‑lasting. Ideal for driveways or landscaped yards.
Steps are:
- Place the post and mark its base holes.
- Drill concrete with a masonry bit.
- Insert anchor bolts.
- Line up and tighten the post securely.
- Mount the letterbox on top.
Make sure everything is level and stable, a lasting solution, often found in post‑mounted mailboxes.
Where Is the Best Place to Put a Letterbox?
The best place depends on your property layout. Ideally, it’s easy for the mail carrier to reach without stepping inside. For suburban homes, that means a front garden fence or driveway. For apartments or smaller properties, near the front door on a wall works best. Your mailbox should also be clearly visible, with a street‑facing mailbox number, and not blocked by plants.
How Do I Choose a Letterbox?
Choosing the right mailbox depends on your needs. You want the right blend of size, material, security, and style.
- Size: Be sure it fits your usual mail, magazines, and small parcels.
- Material: Pick durable, weather‑resistant materials like stainless steel, aluminium, or strong plastic to fight rust and wear.
- Security: A lockable mailbox protects important mail.
- Design: Match your home with modern, classic, or decorative mailbox designs.
Also, check if your local council or post office has rules about mailbox type and placement.
Letterbox Price
Letterbox costs in Australia vary but here’s a good summary:
- Basic models (plastic or simple metal): A$30–A$50
- Wall‑mount or small lockable options: A$60–A$100
- Heavy‑duty or designer mailboxes: A$100–A$200+
You can find options at hardware retailers like Bunnings, or online marketplaces. Remember: materials, design, and security features matter more than price alone.
Final Tips Before You Start
Before installing, check with local authorities about rules for mailbox height or distance from the street. After installing, test it by placing mail inside and gently shaking it, tighten any loose screws if needed. Make sure your house number is clear and visible for efficient mail delivery.
Final Thoughts:
Learning how to install a letterbox is a useful, easy DIY home improvement project that protects your mail and improves your home’s street appeal. By choosing the right style, location, and materials, and carefully following installation steps, you’ll end up with a mailbox that’s practical, safe, and stylish.
Ready to start? Grab your toolbox and dive into this fun and rewarding task. Your mail, and mail carrier, will appreciate it!