Free 4x2 starter plan

The 4x2 Starter Plan is a one page printable PDF for the most common first raised bed size, 48 by 24 inches outside, 11 inches tall. It reaches across from either side without stepping into the soil, and its long boards fit a single 8 foot board with minimal waste.

What is on the sheet

A dimensioned top view diagram, the full cut list with every board length and the corner posts, the standard boards to buy, the hardware needed, the soil volume to fill it in cubic feet and in bags, and the six step build sequence, the same figures the configurator on the homepage returns for a 48 by 24 by 11 inch bed.

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Want a different size or shape

For a different size, use the free configurator above to generate a cut list for any length, width, and height. For five more complete plans, including a full 4x8 bed, a bed on legs, and an L-shaped bed, The Raised Bed Build Pack extends this same format into a full 28 page document.

What the 4x2 bed needs in material

The whole point of this size is that it comes out of stock boards with almost nothing left over.

Stock board	Length	Where it is used
8 feet	96 inches	The 4 foot and 4 by 8 beds, cut with almost no waste
10 feet	120 inches	Long sides of a 10 foot run, or two 5 foot pieces
12 feet	144 inches	The L shaped bed and any run over 10 feet

Soil for this bed and the sizes above it

A 4 by 2 bed is the cheapest one to fill, which is why it is the sensible first bed. These are the volumes at 11 inches, two boards high.

Bed size	Soil to fill it at 11 inches	Bagged	Bulk
4 by 2 feet	7.3 cu ft	5 bags of 1.5 cu ft	0.27 cu yd
4 by 4 feet	14.7 cu ft	10 bags of 1.5 cu ft	0.54 cu yd
4 by 8 feet	29.3 cu ft	20 bags of 1.5 cu ft	1.09 cu yd
2 by 8 feet	14.7 cu ft	10 bags of 1.5 cu ft	0.54 cu yd

Which wood to build it from

For a first bed the species decides whether you rebuild in four years or in twelve.

Species	Lifespan in soil contact
Cedar	Naturally rot resistant, typically 8 to 15 years untreated in soil contact.
Pine	The least expensive option; untreated pine in soil contact often breaks down in 3 to 6 years, ground contact rated pressure treated pine lasts much longer.
Redwood	Similar rot resistance to cedar, typically 8 to 15 years untreated in soil contact.

When to move up a size

Reach is the limit, not area: 24 inches wide can be worked from either side without stepping into the soil, and so can 48 inches for most adults. Beyond that a bed needs a path or a centre access point. The configurator takes any size and returns the cut list, and the Build Pack carries six worked plans including a 4 by 8 with a centre brace and a waist height bed on legs.

Build procedure with practical tolerances

Work on a flat surface that is at least 5 by 3 feet, because a small twist in the first corner will show up as a gap at the last corner. Sort the boards before cutting. Put the straightest pieces on the long sides, because they set the shape of the bed. Mark all cuts from one end with a tape measure, then put a square line across the face and edge so the saw cut stays at 90 degrees.

After cutting, dry fit the rectangle before driving fasteners. Set the two long boards outside the two short boards, unless your plan sheet shows the opposite. Check the outside dimensions, then measure both diagonals from corner to corner. The two diagonal measurements should be within 1/8 inch of each other. If they differ by more than 1/4 inch, push the long diagonal inward and pull the short diagonal outward before fastening the next screws.

Fasten one corner first, then the opposite corner, then the remaining two corners. If you are using corner posts, keep the bottom of each post flush with the bottom edge of the boards so the bed sits level. Pre-drill near board ends, especially with cedar or dry pine. A pilot hole about the diameter of the screw shank reduces splitting and helps the boards pull tight.

Set the finished frame in place before filling. Remove sod or thick weeds inside the outline. If the ground is uneven, scrape the high spots rather than filling low spots with loose soil under the frame. A 1/2 inch dip under one side is usually harmless, but a rocking corner will open joints after the bed is filled.

Tools, layout dimensions, and working clearances

The frame is small enough for one person to build, but the filled bed is not movable. Choose the final location before soil goes in. Leave enough space for a wheelbarrow, watering can, and kneeling position. A 24 inch path works for foot access, while 30 to 36 inches is easier if you use a barrow or have a fence behind the bed.

Item to check	Useful figure	Why it matters
Diagonal difference	1/8 inch ideal, 1/4 inch maximum before correction	Keeps the rectangle square before soil pressure locks it in place.
Path at one long side	24 inches minimum	Allows kneeling and hand weeding without stepping into the bed.
Path for wheelbarrow access	30 to 36 inches	Reduces spilled soil and makes seasonal top-ups easier.
Level error along one long side	Less than 1/2 inch preferred	Limits water pooling at one end after irrigation or rain.
Time for first build	60 to 120 minutes before filling	Includes measuring, cutting, assembly, and leveling for a careful first build.

Use eye protection when cutting and drilling. A tape measure, pencil, square, saw, drill, driver bit, and level are enough for the frame. Clamps are useful but not required. If no clamp is available, stand the boards on edge, hold the corner tight with one hand, and drive the first screw slowly so the screw does not push the boards apart.

Frequent mistakes and how to recover

The frame is out of square. Stop before filling. Loosen, but do not remove, the screws at two corners. Push across the long diagonal until both diagonal measurements match. Retighten the screws and add the remaining fasteners only after the shape is correct.

A board end splits. Back the screw out. Drill a pilot hole farther from the end, usually at least 3/4 inch from the end grain if the board width allows it. If the split is short and does not run through the screw line, the board can often stay in service. If the split opens when the screw is tightened, turn that board so the damaged end is in the least stressed corner, or recut if length allows.

The bed rocks on the ground. Do not solve this by forcing soil under the outside edge after filling. Empty frames are easy to correct. Lift the low side, shave soil from the high spot, and set the frame down again. Check with a level across both the length and width.

Soil settles after watering. New fill commonly drops 1 to 2 inches after the first deep watering. Add soil or compost after the first settling, not before, so you do not overfill the bed and spill mix over the sides. More soil volume questions are covered in the raised bed FAQ.

Special cases before you fill the bed

Grass underneath: Cut the grass short, remove woody weeds, and cover the bottom with plain cardboard if you want to suppress regrowth. Overlap pieces by 4 to 6 inches so grass does not grow through seams.
Tree roots nearby: Keep the bed outside the heavy root zone when possible. Fine roots can enter a raised bed within one season if the bed is placed directly over active roots.
Sloped ground: For a small slope, level the frame by cutting into the uphill side. Avoid stacking loose soil under the downhill side, because it washes out.
Deck or paved surface: Do not place a soil filled bed on a deck unless the structure is designed for the load. Wet soil is heavy, and water must have a safe path to drain.
Very dry climate: Leave 1 to 2 inches of space below the top edge after filling. This makes watering easier and keeps mulch from blowing or washing out.

If the site has drainage problems, test before planting. Fill the bed, water it deeply, and check the surface after 24 hours. Standing water after a full day means the location or the soil mix needs correction before roots are added.