Raised Garden Design Layouts for Small London Plots
A raised garden design layout is, more than anything, a decision about proportion. Raised beds are often sold as a solution to poor soil or tired knees, and they are both of those things, but in a small London garden their real gift is structure. A well-placed raised bed draws a line in a space that otherwise has none, and once there is a line there is a room. This article is about where to draw it.
We will work through the layouts we return to most, the measurements that make them comfortable, the heights and materials that suit a town garden, and the planting that each arrangement invites. Nothing here needs a large site. Most of it comes from gardens under ten metres long.
Start from the path, not the bed
The mistake in most raised bed plans is to begin with the beds and leave the paths as whatever is left. Reverse it. Decide where you need to walk, how wide that walk should be, and what you want to see at the end of it. The beds then fill the remaining space, which is almost always a better shape than the one you would have drawn first.
A main path wants to be at least 900 millimetres wide, and 1,200 if two people will use it together or a wheelbarrow must pass. Secondary paths between beds can drop to 600, but no narrower, or the beds will be trampled at the edges and the path will disappear under foliage by July.
Decide, too, whether the path is straight or offset. A straight path to the end wall makes a small garden feel shorter. A path that steps sideways once, so the far end is not visible from the house, does the opposite.
Layout one: the single long bed
The simplest layout, and often the best. One raised bed runs the length of one boundary, 600 to 900 millimetres deep, leaving the rest of the garden open as lawn, gravel or terrace. It reads as a border with architecture.
This suits narrow gardens, where two beds would leave a corridor. Plant it in layers: a repeated shrub for structure, tall perennials and grasses behind, lower perennials in front, bulbs through everything. Our note on naturalistic planting with grasses and perennials is written with exactly this kind of bed in mind.
Keep the open side free of clutter. The point of the layout is contrast between the full bed and the empty ground.
Layout two: the pair
Two beds facing each other across a central path, each 700 to 1,000 millimetres deep. The path becomes an axis, so give it something to arrive at: a bench, a small tree, a water bowl, a change of surface.
This layout is formal by nature, which is a strength in a small space. Resist the urge to soften it with wiggles. Let the planting do the softening by spilling over the edges. A pair of beds in a six-metre garden, with a 1,200 path between, feels like a proper walk.
Layout three: the L and the U
An L-shaped bed wraps a corner, often the sunny one, and leaves the diagonal open. A U-shape wraps three sides of a small terrace or lawn. Both make an enclosure, which is what most town gardens lack.
The key dimension is the inside: the enclosed area should be at least 2.5 metres across to feel like a place rather than a slot. The bed depth can vary around the shape, deeper on the sunny run, shallower on the shady one.
We used a U-shaped arrangement in a small courtyard, where the beds also carried the seating. Sitting inside planting is a different experience from looking at it.
Layout four: the grid
Four or more beds in a regular grid, usually square, with paths between. This is the kitchen-garden layout, and it is the right one if growing food is the point. Beds of 1,200 by 1,200 millimetres can be worked from all sides without stepping in. Paths of 600 between them, and a wider one across the middle.
The risk is monotony. Break the grid with one bed taller than the rest, or a frame of fruit trees at the corners, or a single ornamental bed at the end the house looks at. The grid should have a view, not only a function.
Height and the view from inside
Raised beds in a small garden are seen as often from the kitchen as from the garden. Think about the eye line from a seated person indoors.
- 300 millimetres reads as a planted edge. Good for keeping lawn and border apart.
- 450 is comfortable to perch on and gives real soil depth. The most useful height for most gardens.
- 600 to 750 is a working height, kind to backs, and begins to feel like furniture. Suits a kitchen garden or a bed with seating built into the wall.
- Above 750 the bed becomes a wall, and the planting is seen from below. Use it only where you want enclosure.
Mixing two heights across a layout, and keeping to those two, makes a small plan feel composed rather than busy.
Materials for a town garden
Timber sleepers are the usual choice, and oak or a treated softwood will give a decade or more. Corten steel is slim, so it takes less space from the planting, and its colour sits well with brick. Rendered blockwork, painted a soft colour, suits a modern house and is the easiest to build a seat into. Brick on edge, to match the house, is the quiet option in a Victorian terrace.
Whatever the material, line the inside of timber beds, provide drainage holes or an open base, and fill with a loam-based mix rather than bagged compost alone, which slumps in a season.
Planting to suit the layout
The long bed wants rhythm: one or two plants repeated along its length. The pair wants symmetry at the ends and freedom in the middle. The L and U want a dominant plant in the corner where the arms meet, often a small multi-stem tree. The grid wants crops in the body and something ornamental at the edges.
Across all of them, a town garden benefits from evergreen structure, because it is looked at in winter from indoors. We wrote about designing for year-round interest, and the principles transfer directly to raised beds, where bare soil in January is more visible than it would be at ground level.
For a shaded north-facing plot the choice of plants narrows, but the layouts do not change. Our list of plants for a shady London garden fills a raised bed as well as it fills a border.
Soil, water and a word on drainage
Raised beds dry faster than the ground. Build in a watering line if you can, and mulch in spring. Where the garden collects water, raise the beds further and let the paths be the drainage, with permeable gravel over a free-draining base. The Royal Horticultural Society's guidance on raised beds covers construction and soil depth in detail if you are building the beds yourself.
A simple way to begin
Measure the garden. Draw the paths first, at proper widths, going somewhere worth going. Fill the rest with one of the four layouts. Pick two heights and one material. Then plant for the view from the kitchen window, in winter, because that is when the layout will have to carry the garden on its own.
