Side returns are the forgotten strip of most British homes. Too narrow to sit in, too useful to ignore, and usually reduced to a corridor for bins, a hosepipe and a downpipe. Yet a passage measuring roughly 900mm to 1.2m wide can be genuinely good — as long as you decide what it has to do before you start buying paving.
Begin with a tape measure and a notebook. Record the narrowest clear width, the position of every downpipe and soil stack, and where the sun falls through the day. North-facing side returns often see almost no direct light, which rules out lavender, rosemary and other sun-lovers. Note the overheads too: a first-floor window or a low gutter will dictate where you can plant tall climbers and where lights can safely sit.
Services matter more here than anywhere else in the garden. Drains, water mains, gas pipes and buried cables commonly run along side returns. If you plan to dig deeper than a spade's depth, use a cable avoidance tool, hand-dig around marked runs, and bring in a qualified contractor for anything unclear. Disturbing a shared drain is an expensive mistake, and it is entirely avoidable.
On a slim path, the surface has to look good, drain freely and cope with daily foot traffic plus the occasional wheelie bin.
Drainage is the detail most people overlook. A side return collects water from two roof slopes, so plan a channel drain across the far end or a soakaway at the lowest point. Keep the clear width at 900mm where you can — anything under 600mm quickly becomes a nuisance to walk through with shopping bags or a watering can.
The floor is precious in a narrow space, so let the walls do the growing. Fix trellis or a wire grid roughly 40–50mm off the brickwork to keep air moving behind the foliage, and keep climbers well clear of gutters, vents and windows. Star jasmine, climbing hydrangea, akebia and ivy all cope with the shade and shelter a side return provides, and Virginia creeper brings reliable autumn colour if you can give it room.
At ground level, square pots and tall, slim planters waste far less space than round ones. Stand them on feet so water drains away, and group them in odd numbers for a calmer look. Good candidates for a shady passage include ferns, epimedium, heuchera, brunnera, hostas in pots away from slugs, and sarcococca for winter scent. Fatsia japonica makes a bold, architectural statement where there is space for one larger container.
Keep soil and compost below the damp-proof course, and never raise bed levels against the house wall. A narrow border of 300–400mm is plenty for ferns and hardy geraniums without inviting damp problems.
Lighting is what turns a passage into a place. Choose warm white fittings around 2700K, rated IP65 for exposed positions and IP44 as a minimum elsewhere, and keep every lens shielded so you see the effect, not the bulb. Downlights mounted high on the wall at three or four metre intervals give even, practical light without glare.
Add a little theatre: small uplighters tucked into pots to graze a fern, step lights set into the path edge, and a single warm fitting at the far end to draw the eye towards the garden. Fit a PIR sensor for everyday use and a timer so the space glows rather than blazes. Be considerate with neighbours — direct light away from their windows, and avoid leaving everything on until midnight.
Light colours help enormously. Pale paving, limewashed brick and silver-grey foliage all bounce what little daylight reaches the passage back into the house.
A side return only stays attractive if the awkward items have a proper home. Measure your actual wheelie bins before buying a store — standard bins vary between councils, and slimline versions are noticeably narrower. A timber or metal bin store with a lift-up lid keeps things tidy and hides the mess from the kitchen window.
Little and often is the secret with a narrow space, because every flaw is close to the eye. Sweep weekly, jet-wash porcelain and clay once or twice a year, and top up jointing sand before winter. Clear gully gratings and channel drains in autumn, when leaves collect faster than anywhere else in the garden.
Cut climbers back from windows and gutters each spring, refresh the top layer of compost in pots, and move tender containers into shelter before the first hard frost. Check the seals on outdoor light fittings annually. Finally, give the far end a focal point — a single handsome pot, a small tree such as a Japanese maple, or a bench end — so that every glance out of the kitchen window lands on something worth looking at.