Why a Side Gate Earns Its Keep

If you have ever lugged a wheelie bin through the house on collection day, or tried to squeeze a bike down a narrow passage between the garage and the fence, you already know the problem a side gate solves. It turns a dead strip of ground into a working route. Bins, bikes, recycling boxes, bags of compost, a wet dog, a pushchair, sacks of gravel for the patio — all of it can go round the side instead of through the kitchen.

There is a security benefit too. A gap at the side of a house is the classic way into a back garden, and an open one tells anyone passing that the rear of the property is unguarded. A gate that latches shut and locks properly closes that route without making the house feel hemmed in. The trick is getting the details right before you buy, because a gate that is 50mm too narrow or swings the wrong way is a daily irritation for the next fifteen years.

Measure Your Worst Case, Not Your Best

Start by working out what actually has to pass through. A standard pedestrian gate leaf of 900mm is comfortable for people and fine for a bike you push through at an angle, but it is not generous once you add a bin.

• Wheelie bins: most UK council bins are around 580mm wide and 1100mm tall. One passes through 900mm easily; two side by side do not. If you regularly wheel two out together, you want a clear opening of 1200mm or more.
• Bikes: an adult bike is roughly 1.8m long, so it goes through a 900mm gate with a wiggle. Wide handlebars on a mountain or cargo bike are the real constraint — measure across the bars and add 100mm.
• Wheelbarrows and mowers: a loaded barrow is awkward and wide. 1000mm to 1200mm makes the difference between a smooth push and a scraped knuckle.

Remember that gate leaf width and clear opening are not the same thing. Hinges, latch stile and the posts themselves eat into the gap, so between the posts you need roughly 40mm to 60mm more than the leaf. Allow a little ground clearance as well: 25mm to 50mm under the bottom rail stops the gate dragging on uneven paving and keeps the timber out of standing water.

Height, Position and the Rules Worth Checking

In England and Wales, a gate or fence in a rear garden can normally go up to 2m without planning permission under permitted development. Where the boundary meets a highway — the pavement in front of the house — the limit drops to 1m. Conservation areas, listed buildings, Article 4 directions and any restrictive covenant on the deeds can change all of that, so a quick look at your title documents or a call to the local planning office is worth twenty minutes. If the gate sits across a shared alley used by a neighbour, check whether there is a right of access recorded before you block anything.

Think about which way the gate swings, too. Outward-opening gates into a passage are easier to use with an armful of bin bags, but only if there is space to stand back. On sloping ground, a gate that swings downhill will catch; a diagonal brace and a slightly raised latch side usually sort it.

Materials: Match the Boundary, Not the Catalogue

The gate will be read as part of your front boundary even though it sits at the side, so it should look deliberate next to the fence and any existing railings.

• Pressure-treated softwood: the practical choice. Cheap, repairable, takes a stain. Expect to re-oil or stain every couple of years.
• Cedar, oak or iroko: handsome and long-lived, with oak needing little more than an occasional oil. Heavier, so it needs sturdier hinges and posts.
• Galvanised or powder-coated steel: slim, secure and low maintenance, and it suits railings and modern boundaries. Watch for rust at cut edges and scratched corners.
• Composite: no rot, no repainting, but it can look plasticky against a period property and it is unforgiving if the posts move.

Locks, Latches and Hinges

A gate is only as secure as its hanging and its fastening. Lift-off hinges are the weak point on cheap gates: anyone can lift the gate clear of the pins in seconds. Anti-lift hinge bolts or security hinges solve this for a few pounds and are the single best upgrade you can make.

For the latch, a keyed-alike rim lock matched to your other outdoor locks saves hunting for the right key. Add a lockable drop bolt into the ground on the hinge side, and fit self-closing spring hinges if the gate is used constantly and left open. If your home insurance schedule requires the side access to be locked, check what it specifies before you buy — many policies simply ask for a key-operated lock on any external gate, but some are more particular.

Fitting It Properly and Keeping It Sweet

Posts should be at least 100mm square and set 600mm into the ground in concrete, deeper on soft ground. Undersized posts, or posts simply bolted to a wall plate, are behind most sagging gates. Hang the gate level and square, then check it after a fortnight and again after the first wet spell — timber swells and shrinks with the seasons, and hinges work loose.

Once a year, tighten the hinges, oil the lock, and treat any bare timber. Keep the bottom rail clear of the ground so air can move underneath, and clear fallen leaves from the swing path so the gate does not jam in autumn. Do that, and a well-chosen side gate quietly earns its place for decades.