Get in touch

Build a Pallet Compost Bin the Easy Way for Your Backyard

Composting at home has quietly become a favourite weekend project for many Australians who want to turn kitchen scraps into rich soil without spending a fortune at the nursery. Pallets are a thrifty starting point because they show up at the side of the road, behind shopping centres, and stacked up at the local tip in just about every suburb from Penrith to Joondalup. With a few basic tools, a couple of afternoons in the shed, and a willingness to get your hands a bit dirty, you can build a sturdy composting station that handles everything from vegie peelings to lawn clippings.

The bonus is that a homemade pallet compost bin fits the way Aussies actually live. Backyard blocks often have room along the side fence or behind the garage, and the slatted timber sides let air circulate naturally, which is exactly what the microbes in your heap need to break things down fast. Whether you are in a fibro cottage in Brisbane, a weatherboard in Hobart, or a newer build out in the western growth corridors of Melbourne, the build is the same and the rewards are immediate.

This guide walks you through picking pallets, putting the frame together, choosing the best spot in the garden, and looking after the heap through the seasons. There is also a quick comparison further on if you are tossing up between a pallet bin and other backyard options.

Why Pallets Work So Well for Aussie Backyards

Pallet timber is designed to carry heavy loads, so the boards are usually thick enough to stand up to a couple of years of weather and the constant pushing and shoving of turning compost. Most pallets you find at the local recycling yard or behind a Bunnings Warehouse are made from hardwoods such as spotted gum or slash pine, both of which handle the humid summers along the east coast and the dry heat out west reasonably well. The slats also leave gaps, which means you do not have to drill dozens of air holes like you would with a solid timber build.

Another reason pallets make sense is the cost. A brand new timber compost bin from a garden centre can set you back well over a hundred dollars, while reclaimed pallets are often free for the asking. Many Australians have scored perfectly good pallets from small businesses around the industrial estates near Campbelltown, Campbellfield, or Yatala, where shops are happy to see them go rather than pay to dispose of them. That kind of bargain sits well with the practical, no-fuss attitude most of us take to weekend renos.

There is a small catch worth knowing about. Some pallets are treated with chemicals to stop insects and rot, and you want to avoid using those for anything that touches food scraps. Stick to pallets stamped with "HT" (heat treated) rather than chemical codes, and you will be right. This is especially important in parts of the country where termites are active, because you do not want to lure white ants into your garden bed with treated pine.

Picking the Right Pallets and Gear from Bunnings or the Local Yard

Most standard pallets in Australia are either the small 1165mm by 1165mm square style or the longer 1200mm by 1000mm rectangle, sometimes called "GMA pallets" if you are shopping at a wholesale supplier. Either size works, though the square ones are easier to square up into a box shape with four walls. Before you load anything into the ute, give each pallet a quick tap with a hammer to check for loose nails and a sniff for any strong chemical or fuel smell, which is a giveaway that the wood has been contaminated.

You will need four pallets to make a simple three-sided bin, or five if you want a removable front panel that slides up for turning. Beyond the pallets, a short trip to Bunnings or your local Mitre 10 will sort you out. Grab a box of 50mm galvanised screws, four corner brackets, a roll of chicken wire if you want to line the inside to keep finer material from washing out, and a simple latch or hook for the front panel. A couple of hinges on the front pallet makes access much easier when you are tipping out finished compost with the wheelbarrow.

If you would rather not build a front-opening system, you can simply stand four pallets on their edges in a square and tie the corners together with galvanised wire. This no-screws approach is dead simple and great for renters who want something they can take apart when they move. It also means no screws going into the pallets, which keeps them in good nick if you ever want to repurpose the timber for a vegie patch edge or a garden bench.

Tools and Materials You Will Need

The tool list for this project is short enough that you can probably borrow half of it from a neighbour. You will want a cordless drill with a pilot bit and a driver bit, a hammer, a tape measure, a pencil, and a pair of decent work gloves because old pallet timber can be surprisingly splintery. A hand saw or a small circular saw is handy if you need to trim a pallet down or cut a slat to size.

Materials-wise, beyond the pallets themselves, pick up a pack of 50mm or 65mm galvanised or stainless steel screws. Regular zinc-plated screws will rust quickly when exposed to moisture and compost, so do not be tempted by the cheaper box. A roll of 25mm galvanised wire or some heavy-duty cable ties will hold everything together if you are going the no-screws route. If you are lining the inside with chicken wire, the 25mm hole size works well to stop finer material from spilling.

It is also worth grabbing a bag of cow manure or a bag of compost starter from the garden centre to kick things off when you first fill the bin. Plain garden waste will eventually break down on its own, but a starter gets the microbes working in days rather than weeks. Some keen gardeners around the country also keep a worm farm running alongside the pallet bin, and a Tumbleweed worm farm tucked under the laundry tap is a common sight in many Aussie backyards for handling the smaller scraps the compost bin cannot take.

Building the Frame Step by Step

Start by laying out the pallets flat on a level patch of ground, ideally on top of a few bricks or pavers to keep the base off the damp soil. Arrange three pallets in a U-shape with their good faces facing inward. If you want a removable front, set the fourth pallet aside for now and cut two short timber offcuts to act as stops so the front panel does not slide out when you fork the heap. If you are happy with a fixed front, screw the four pallets together at the corners using your brackets and screws, pre-drilling first to avoid splitting the timber.

Once the frame is up, line the inside walls with chicken wire if you have chosen to use it. Staple it in place or simply peg it with a few U-shaped nails. The wire also helps if you are adding a hinged front panel later, because it gives the compost something to grip when you fork it out. Make sure the bottom of the bin sits directly on the soil rather than concrete or pavers, as the worms and microbes need to move up into the heap from the ground below.

If you have gone with the removable front option, attach a couple of small hinges to the bottom of the front pallet and screw the other side into one of the side pallets. A simple hook-and-eye latch at the top keeps the door closed against curious chooks or the family dog. Stand back, give it a shake to make sure everything is solid, and you are ready to start filling it.

Where to Put Your Compost Bin in the Garden

Location matters more than most people think. Aim for a spot that gets a bit of morning sun but is shaded from the harshest afternoon rays, especially if you are in Brisbane, Perth, or anywhere west of the Great Dividing Range where summer temperatures regularly push past 35 degrees. Too much direct heat will dry the heap out and slow the breakdown, while deep shade keeps it too cold and soggy through winter.

Think about access too. You will be walking out to the bin most days with a bucket of scraps, so put it within easy reach of the back door but not so close that any smell drifts into the kitchen on a warm arvo. A distance of about five to ten metres from the house is the sweet spot for most backyards. Also check the slope of your block. A slight downhill position helps water drain away rather than pool at the base, but you do not want the bin sitting in a low spot where it will turn into a bog every time it rains.

Before you commit to a spot, have a quick look at your local council's guidelines on composting. Most councils across Australia actively encourage home composting and even run free workshops through their sustainability programs, but a few have rules about distance from fences or boundary lines. A quick check of your council's website, or a call to the local sustainability officer, can save a neighbourly argument down the track.

Keeping the Compost Cooking Through Hot Aussie Summers

The number one job after building your bin is keeping the moisture balance right. The heap should feel like a wrung-out sponge, damp but not dripping. Through summer, especially during a dry spell in November or January, you will need to give it a good soak with the hose every week or so. A handful of dry grass clippings, straw, or shredded newspaper on top helps lock that moisture in and keeps the flies away.

Turning the heap every two or three weeks with a garden fork keeps air moving through the centre and speeds things up considerably. If you built the hinged door version, this is where it pays off. Fork everything from the back to the front, then back again, and the temperature inside will climb as the microbes get to work. A well-fed heap in the warmer months can hit 50 to 60 degrees in the middle, which is hot enough to kill off most weed seeds and a lot of the pathogens people worry about.

For winter, especially down south in Melbourne, Canberra, or Hobart, expect things to slow down. You do not need to do much beyond keeping the heap covered with a piece of old carpet or a tarp to hold a bit of warmth in. By spring, once the days warm up, you will be rewarded with dark, crumbly compost that smells like a forest floor after rain. Spread it on the vegie patch, around the citrus, or use it to top up the garden beds around the pool.

Troubleshooting Common Pallet Compost Issues

If the heap smells sour or rotten, it is usually too wet or has too much green material and not enough brown. Toss in a few handfuls of dry leaves, shredded cardboard, or straw and give it a turn. If it has gone slimy and acidic, a sprinkle of garden lime from Bunnings will bring the pH back into a comfortable range for the microbes.

If the heap is dry and nothing seems to be breaking down, it probably needs water and a bit more nitrogen. Add some fresh manure, blood and bone, or even a few spent coffee grounds if you are a regular at the local cafe. Coffee grounds are a favourite freebie among community composting groups in places like Fremantle and Newtown, where cafe owners are often happy to fill a bucket for keen composters.

Finally, if rats or mice become a problem, avoid putting bread, meat, or dairy into the bin and make sure you are burying fresh scraps under a layer of dry material rather than leaving them on top. A solid base with pavers and a lid of chicken wire weighed down with a brick will also discourage unwanted visitors without needing any chemicals.

Composting method Cost Speed Effort Best for
DIY pallet bin Very low 2-4 months Low Backyards with space, budget builds
Tumbler bin Medium-high 4-8 weeks Medium Small yards, quick results
Worm farm Medium Ongoing Medium Indoor scraps, small spaces
Bokashi bucket Low 2-4 weeks (fermented) Low Apartments, no garden
Pit composting Free 6-12 months Very low Large blocks, low maintenance

Kitchen scraps that compost well in a pallet bin:

Common mistakes to steer clear of:

Ready to turn this weekend into the start of a much richer garden? Grab a few pallets, head down to your local Bunnings for screws and a starter bag, and you will have a working compost bin before the barbie is even lit. Drop a comment below with a photo once yours is up and running, and tell us what you are planning to grow with all that lovely homemade compost.