What you'll need
Avoid using reclaimed railway sleepers for food growing — they may have been treated with preservatives that persist in soil.
Step-by-step guide
- Choose the siteFull sun is ideal for vegetables — at least 6 hours per day. Avoid tree roots which will invade the bed. Position where you can comfortably reach the centre from either side without stepping in — 1.2m wide maximum.
- Cut timber to lengthStandard raised bed: 2.4m long boards for the sides, 1.2m boards for the ends. At 300mm height, use two courses of boards. Use untreated hardwood, pressure-treated softwood, or scaffold boards (note: some scaffold boards have been treated with preservative — use food-safe alternatives for edibles).
- Build the frameDrill pilot holes and screw boards together at the corners. Use 75x75mm corner posts for strength on beds over 1.2m long — the posts are on the inside, not visible from outside. A second pair of hands makes alignment easier.
- Position and levelSet the frame in position. Use a spirit level to check it's level. On sloping ground, pack under the lower side with gravel or sink one side slightly into the ground.
- Line the baseLay cardboard over the base — this suppresses weeds coming up from below and breaks down naturally over a season. No landscape fabric — it restricts worm activity.
- Fill with compostFill with a mix of topsoil (60%) and quality compost (40%). This is the most expensive part — 1.2m x 2.4m x 0.3m deep requires approximately 900 litres of growing medium.
Build the bed in place — a filled raised bed is impossible to move. Measure twice, position once.
Expert tips for the best result
- Railway sleepers make beautiful raised beds but new treated sleepers leach creosote — use oak sleepers or specifically untreated timber for food growing
- Raised beds 400-500mm deep allow root vegetables to grow without hitting subsoil
- A lid of chicken wire keeps cats out and can double as a frame for netting against birds
- Fill from the bottom with coarser material (twigs, bark, woody material) — it rots down and improves drainage
- Permaculture raised beds: fill the bottom third with logs and branches (hugelkultur method) — they slowly decompose and hold moisture
Useful tools and products
When to call a professional gardener
Large-scale raised bed kitchen gardens, beds requiring retaining wall construction (very deep or on slopes), or raised beds with integrated irrigation systems.
We connect you with vetted local gardeners across the UK — fast response, free quotes, guaranteed work.
💬 Get a free quote via WhatsAppFrequently asked questions
How difficult is how to build a raised bed for a beginner?
This guide is rated Easy. Raised beds are one of the most rewarding garden projects — they improve drainage, warm up faster in spring, and make veg growing productive even on poor soil. A simple 1.2m x 2.4m raised bed takes on If you're not confident, a professional gardener can do this quickly and provide a guarantee on the work.
How long does how to build a raised bed take?
Allow 2-4 hours. This assumes the tools and materials are ready before you start. First-timers should budget extra time for preparation and any unexpected issues.
How much does a gardener charge for this in the UK?
Most gardeners charge £40-80 per hour depending on location and complexity. For a straightforward job like this, expect 1-2 hours of labour plus materials. Get a fixed quote via WhatsApp — message us with your postcode and job details.
How do I find a reliable gardener near me?
WhatsApp us with your postcode and job description. We match you with a vetted local gardener from our network — most jobs get a response within the hour. Contact us here.