What is a carport?

A carport is an open, roofed structure that shelters a vehicle from rain, sun and frost without enclosing it in solid walls. It usually has a roof carried on posts, sometimes fixed to the side of a house, and it is open on at least one or two sides. Think of it as a permanent canopy over a parking space rather than a lockable building. That open design is the whole point. A carport keeps the weather off the car and off you while you load the boot, but it does not lock, it does not fully enclose, and it will not store much beyond the vehicle itself.

The main types of carport

A carport does one job well: it puts a roof over your car. That roof keeps rain, snow, hail and bird mess off the paintwork, and it stops frost forming on the windscreen on cold mornings, which saves you scraping ice before work. In summer it keeps the cabin cooler and protects the dashboard and trim from sun bleaching. All of that comes without the cost or the footprint of a full building.

Because it is open, a carport is quick to use. You pull straight in, get out, and walk to the house without a door to lift or unlock. For anyone carrying shopping or wrangling children into car seats, that shelter over the open boot is the part people notice most. It is also handy as a general cover for bikes, a mobility scooter, a motorbike or garden furniture in the off season.

What a carport does not do is secure anything. There is no lockable door and usually no walls, so it offers no protection against theft and only partial protection against wind-driven rain. If a storm blows sideways, the sheltered side stays dry and the exposed side does not. It is shelter, not a strongroom. Understanding that trade-off is the key to deciding whether a carport is right for you.

The core difference is walls and a door. A garage is a fully enclosed, lockable building with solid walls all round and a door you can shut. A carport is open on one or more sides with no door. A garage gives you security, weatherproofing and storage. A carport gives you a roof and easy access, and little else.

That difference drives everything downstream. A garage costs more, takes longer to install and needs a proper poured concrete base to sit on, because a concrete or brick-clad building is heavy and needs an even, load-bearing slab. A carport is lighter, so it can often go on an existing driveway or a set of post footings, which makes it faster and cheaper to put up. You trade security and storage for speed and cost.

There is also a middle ground worth knowing about. A lean-to garage is a slim, fully enclosed building, while a lean-to carport is just a roof against the same wall. People often mix the two up when searching. If your real need is to lock a car and some kit away, price a garage. If your real need is simply to stop the car icing up and getting soaked, a carport does that for a fraction of the outlay.

Some people fit a carport now and add walls or a garage later, or use a carport to shelter a second car alongside an existing garage. Both are sensible. Just be clear which problem you are actually solving before you buy, because the two structures answer different questions.

Most modern carports are built from an aluminium or galvanised steel frame with a polycarbonate or metal roof. Aluminium does not rust, it is light to handle and it needs almost no upkeep, which is why it dominates the kit market. The roof is usually clear or tinted polycarbonate, which lets light through so the space underneath does not feel dark, or solid metal sheet where you want full shade.

Timber carports exist too, and they look warm and traditional, but timber needs treating and re-treating to keep it sound outdoors. Steel frames are strong and cheap but need a protective coating to stop corrosion at cut edges and fixings. Polycarbonate roofing is the common choice because it is light, shatter resistant and copes with UK weather, though it will collect leaf debris in a valley or against a wall and wants an occasional clear out.

The posts are the part that matters structurally. They carry the roof and take the wind load, so they need to be anchored properly, either bolted to a slab or set into concrete footings. A carport that is only weighted down or loosely fixed is asking for trouble in a gale. Get the fixing right and a good aluminium carport will stand for decades with a wash down now and then.

A carport needs something solid to anchor its posts to, but not always a full concrete slab. The posts carry the load, so each one needs a secure fixing: either bolted down to a firm, level surface, or set into individual concrete footings dug below ground. What you cannot do is stand a carport on soft or uneven ground and hope for the best, because wind uplift will find any weak point.

If you already have a sound concrete or block-paved driveway, a carport can often bolt straight down to it, which is one of the reasons carports go up so quickly. On bare or soft ground, the usual approach is to dig and pour a concrete footing for each post so it cannot lift or wobble. This is a much smaller job than pouring a full base for a garage.

This is where a carport differs sharply from a concrete garage or shed. A concrete building always needs a full poured concrete base, 100mm thick and 150mm bigger than the building on each side. Paving slabs, gravel, timber bearers or plastic grids are fine under a light timber shed but are never an option under a concrete building. A carport sits somewhere in between: lighter than a concrete building, but still needing its posts anchored to something that will not move.

In most cases a domestic carport counts as permitted development and does not need planning permission, but there are conditions and exceptions, so you should always check before you build. Permitted development lets you put up an outbuilding or canopy in your garden within set limits on height, siting and how much of the plot is covered, without a full application.

The rules that most often catch people out relate to position and height. A carport forward of the principal elevation, in other words in front of the building line facing a road, usually needs permission. Height near a boundary is capped, so a carport within two metres of a boundary generally must not exceed 2.5 metres. Listed buildings, conservation areas and some newer estates with planning conditions have tighter rules again, and flats and maisonettes do not get permitted development rights at all.

Keep planning permission separate from building regulations in your head, because people constantly conflate the two. Permitted development is about whether you are allowed to build; it has no floor area limit. Building regulations are a separate technical code about how a structure is built. An open carport below 30 square metres is normally exempt from building regulations anyway, but that 30 square metre figure is a building regulations threshold, not a planning one. Two different rulebooks, two different questions.

A carport can usually sit close to a boundary, even right up against it, but the height is limited once you are within two metres of that line. Under permitted development, any part of the structure within two metres of a boundary must not be more than 2.5 metres tall. Step back beyond two metres and you have more headroom to play with, subject to the other permitted development limits.

This matters more than it sounds, because a carport tall enough to clear a van or a 4x4 with a roof box can easily push past 2.5 metres. If you want that extra height and you are near the fence, you either move the structure inboard or you apply for planning permission. It is worth measuring the tallest vehicle you expect to park before you settle on a design and a position.

Boundary rules also affect your neighbour. Rain running off a carport roof must not discharge onto next door's land, and the structure should not overhang the boundary. Fixing a lean-to carport to a shared or party wall raises its own questions too. A quick conversation with the neighbour before you start saves a lot of grief later.

A carport can add value, but usually less than a garage of the same footprint, because buyers pay for the security and storage that a garage gives and a carport does not. Where a carport helps most is on a house that has no covered parking at all and no easy way to add a garage. Turning open driveway parking into sheltered parking is a genuine plus at viewing time.

The bigger effect is often on how quickly a house sells and how it shows, rather than a headline figure on the asking price. A tidy, well fitted carport signals that the parking is sorted and the car will be looked after. A cheap, wobbly one that looks like an afterthought does the opposite, so quality and neat installation matter.

If your main aim is resale value rather than day to day convenience, weigh a carport against a garage before you commit. A garage tends to return more, but it costs more and needs a full base and more space. A carport gives you most of the everyday benefit for far less outlay, and on the right house that is exactly the right call.

Choose a carport if you want cheap, quick, low maintenance shelter over a parking space and you do not need to lock anything away. Choose a garage if you need security, dry storage and a fully enclosed space you can also use as a workshop or store. That is the decision in one line, and most people know which side they fall on once they say it out loud.

Budget, space and time all point the same way for a carport. It is the lower cost option, it goes up fast, and it fits where a full building would not. If you have a second car, a caravan, a boat or just a drive that ices over every winter, a carport solves that neatly. It is also a good stepping stone if you might build a garage later and want shelter in the meantime.

A garage wins whenever security or storage is the real driver. If you keep tools, bikes, a motorbike or anything worth stealing, or you want a space to work in out of the wind, four walls and a lockable door are worth the extra. Some households end up with both: a garage for storage and security, and a carport alongside it for the second car. There is no single right answer, only the one that fits how you actually use the space.

A carport is an open, roofed structure that shelters a vehicle from rain, sun, frost and hail without enclosing it in solid walls. It has a roof carried on posts, is open on at least one side, and does not lock. That makes it cheaper and faster than a garage and easy to drive straight into, but it gives you no security and little storage. A carport needs its posts anchored firmly, either bolted to an existing solid drive or set into concrete footings, though it does not need the full poured base a concrete building requires. Most domestic carports fall under permitted development, with height limited to 2.5 metres within two metres of a boundary, but always check before you build and keep planning permission separate from building regulations. Choose a carport for cheap, quick shelter; choose a garage when you need to lock things away.