Backyard Three-Bin Compost System Building Service

I build custom three-bin backyard compost systems designed for real turning workflow, not just a box that holds leaves. Each system has three side-by-side bays so material moves through fresh, active, and finished stages without you ever needing a second pile or a tumbler. I start with rot-resistant lumber selection — cedar or heat-treated pine depending on your budget and climate, never pressure-treated stock near edible gardens — and lay out the frame on a level, tamped gravel or paver foundation so the bins do not rack or settle unevenly over a few seasons.

The front of each bay uses removable horizontal slats that slide down channels, so you can pull boards as the pile lowers and get a wheelbarrow or fork straight into the bin without climbing over a wall. Side and back panels get calculated ventilation gaps — spaced for airflow without material sifting through and making a mess underneath — and I reinforce every corner post with galvanized hardware rated for outdoor exposure, not standard interior screws that rust and back out within a year.

I size the bays to the volume that actually heats up (roughly one cubic yard each is the sweet spot for hot composting), add a hinged or lift-off lid option to keep rain from waterlogging the active bay, and can include a hardware-cloth base if rodents are a concern in your area. Every build gets a walkthrough on layering greens and browns, turning frequency, and moving material bay to bay, so the system works for you from week one instead of sitting there unused. Typical turnaround is a few days from site visit to finished install, and I handle disposal of packaging and offcuts so your yard is left clean.