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A 4×8-foot raised bed costs anywhere from $0 to $400 or more, and the frame is rarely the biggest expense — soil is. A typical 12-inch-deep 4×8 bed holds 32 cubic feet of soil, which alone can cost $100–$250 in bags. So the cheapest bed is the one that combines a low-cost frame with smart filling.
Frame cost for one 4×8 bed
| Material | Frame cost | Lifespan | Cost per year |
|---|---|---|---|
| Free pallets / scrap wood | $0 | 2–4 yrs | $0 |
| Concrete (cinder) block, 1 course | $26–$40 | 20+ yrs | ~$2 |
| Untreated pine, 2×10 | $45–$80 | 3–5 yrs | ~$15 |
| Galvanized metal kit | $60–$150 | 10–20 yrs | ~$7 |
| Cedar, 2×10 or 2×12 | $150–$300 | 10–15 yrs | ~$20 |
| Composite / recycled plastic kit | $150–$400 | 20+ yrs | ~$13 |
Typical US price ranges in late 2026; local lumber prices swing a lot. Soil not included — see below. How we price.
The soil line: where budgets break
Most people price the frame and forget the fill. Here’s the soil math for a 4×8 bed:
- 8 in. deep: ~21 cu ft — about $110–$170 in bags.
- 12 in. deep: 32 cu ft — about $160–$250 in bags, or often less in bulk.
- With free filler in the bottom half: roughly half those numbers.
Plug your exact size into the raised bed soil calculator to get cubic feet, yards and bag counts.
Material by material
Free pallets or scrap wood — $0
Fine for a first season or a trial bed. Use only heat-treated pallets (stamped “HT”), never “MB” (methyl bromide). Expect it to rot in a few years.
Cinder block — about $26–$40
The best cost per year of anything permanent. No tools needed and the block holes double as planting space. See the full 4×8 cinder block receipt — about $110 including soil.
Untreated pine — $45–$80
Cheap upfront and easy to cut, but it rots fastest. Good if you rent or might move the bed.
Galvanized metal kits — $60–$150
Quick to assemble and long-lasting. Taller kits (17 in.+) need a lot more soil, which can cost more than the kit itself.
Cedar — $150–$300
Naturally rot-resistant and good-looking, but the most expensive wood option. Cedar prices vary the most by region.
Composite — $150–$400
Lasts the longest with zero maintenance. Rarely worth it on a tight budget.
The dirt cheap rule
Spend on the frame only as much as you need for the years you’ll use it, and never pay for soil you could fill with logs, leaves and cardboard. A $30 block frame with free filler beats a $250 cedar kit full of bagged soil for anyone on a budget.
FAQ
What is the cheapest way to build a raised bed?
Free pallets or scrap wood for the frame, cardboard over the grass, and logs and leaves in the bottom half. Concrete blocks are the cheapest permanent option.
Is it cheaper to build or buy a raised bed?
Building with blocks or pine is cheaper than most kits. Metal kits can be competitive with cedar lumber.
How deep does a raised bed need to be?
8–12 inches works for most vegetables if the ground below is loosened. Deeper beds cost more to fill.
Does a raised bed need a bottom?
No. Open-bottom beds on cardboard drain better and let roots reach the soil below.
