Letterbox Rules for New Estates: Height, Placement & Installation Cost

If you've just moved into a new-build home in Rouse Hill, Box Hill or North Kellyville, chances are your letterbox is one of the last things on the list — and one of the first things Australia Post and your mail carrier will actually notice. Here's what to know before you install one.

Australia Post's placement guidelines

Australia Post asks that letterboxes be:

• Positioned at the front boundary, easily accessible from the street without the carrier needing to enter the property
• At a consistent, reachable height — generally around waist to shoulder height for a walking or cycling carrier to reach without dismounting or stretching awkwardly
• Clearly numbered, matching your street address, so mail (and deliveries) find the right house first go
• Not obstructed by plants, bins, or parked cars on a regular basis

These are guidelines rather than strict legal requirements, but estates increasingly bake similar rules into their design covenants — so it's worth checking both Australia Post's general guidance and your specific estate's covenant before you buy.

Estate design covenants

Many newer Hills District estates (parts of Box Hill, Rouse Hill and North Kellyville especially) have covenants that go further than Australia Post's guidelines, specifying things like:

• Approved letterbox styles or materials (brick-in, powder-coated steel, timber-look)
• Matching finishes with the rest of the streetscape
• A required installation window after handover

If you're unsure, your estate's handover pack or body corporate/community association usually has the covenant document. We're happy to install to match a specific covenant if you send it through with your enquiry.

Pillar vs wall-mounted vs brick-in

• Pillar letterboxes — freestanding, most common in new estates, easiest to install without needing to modify a fence or wall
• Wall-mounted — fixed to a front fence or wall, a good option where a freestanding pillar would sit awkwardly
• Brick-in retrofits — some estates require a brick pillar letterbox that matches the home's brickwork; this is more involved and usually needs to be scheduled with enough lead time to match materials

What installation costs

For a typical Hills District install:

• Install only (your letterbox): $110–$180
• Supply and install (standard letterbox): $220–$420
• Brick-in retrofit: $280–$480

Removal of an old or damaged letterbox is a small add-on, usually from $40.

Getting it right the first time

The most common mistake we see in new estates is a letterbox installed slightly too low, too high, or too close to the letterbox next door — easy to fix, but easiest to avoid by checking the covenant and getting a second opinion before you dig a post hole. If you're not sure what's compliant for your street, send us a photo of a neighbour's letterbox with your enquiry and we'll match the look.

See our letterbox installation page for full pricing, or get a quote for your suburb.