Cheap Shed, Real Cost: How to Read a Second-Hand Shed Before You Pay

Second-hand sheds occupy a strange corner of the UK market. They're almost never worth much as objects, yet there's a steady trade in them because the alternative — a new 8x6 from a garden centre — costs several times more and arrives flat-packed with a bag of screws and a bad mood.

So the question isn't really whether a used shed is worth £250. It's whether that particular shed, on that particular base, with that particular transport problem, is worth £250 plus everything else. Those extras are where the arithmetic gets interesting.

Start by asking why it's being sold

The listing almost always says 'moving house' or 'no longer needed'. Sometimes that's true. But a shed that's being sold because it's reached the end of its life looks much the same in a photograph as one that's simply in the way. Ask how old it is, whether it's been treated, and whether it's currently sitting on a base or straight on soil. A shed that's been on bare ground for a decade will have taken up water through the floor, no matter how tidy the walls look.

Read the frame, not the paint

Cladding is the easy bit. Anyone can paint over a tired panel, and a fresh coat of brown on a sunny afternoon hides a remarkable amount. What you're actually assessing is the framing behind it — the studs and rails that give the thing its shape.

Crouch down and look along the bottom of each wall from outside. The bottom rail is the first thing to go, because it sits closest to splashing and has the least airflow. Press it firmly with a thumb. If it gives, walk away — replacing a bottom rail on a shed you don't yet own is a project, not a purchase.

Inside, look at the corners where two walls meet. Push the panels gently. Movement of more than a few millimetres suggests the frame has loosened, usually through years of the building flexing on an inadequate base. Light coming through the joints on a bright day isn't automatically fatal, but gaps wide enough to see daylight through in several places mean the building has stopped being weathertight.

The felt is a receipt for neglect

A roof tells you how the shed has been treated. Original felt that's brittle, patchy, or curling at the eaves is a re-roof waiting to happen — and while that's not expensive in materials, it's a full day's work and it needs doing before the first autumn storm, not after.

Look inside at the roof boards for staining. Dark rings and tide marks mean water has been getting in for a while, and the boards above your head may be softer than they look. A single small leak is forgivable. A roof that's been leaking across a whole panel is not.

Damp you won't spot at three in the afternoon

Viewing a shed on a dry, breezy day is the worst possible conditions for finding moisture. Try to go early morning or after rain if you can, and pay attention to the smell when you open the door. Mustiness on a dry day is a signal.

Check the floor for soft spots with the heel of your boot, particularly along the edges. If it's a tongue-and-groove floor sitting on bearers, ask whether the bearers are still there and still solid. A floor that flexes alarmingly underfoot is a floor you'll be replacing within a season.

Now the sums nobody puts in the listing

Here's where a £250 shed stops being a £250 shed.

Dismantling. Sheds come apart, but old ones don't come apart cleanly. Screws shear, nails hold, and panels crack as you lever them. Budget a full day with two people, and accept that you'll lose some cladding in the process.

Transport. A 8x6 shed is roughly a small van load in panels, but the panels are long, awkward and heavy. Hiring a van for a day is typically £60–£100 plus fuel; a man-with-a-van is often £150 and up depending on distance. If you don't own a trailer, add that to the mental price straight away.

Replacement panels. Expect to need two or three boards and a sheet or two of felt. That's rarely more than £80, but it's real, and it's time.

A new base. This is the big one people forget. A used shed needs a flat, level, drained base — slabs, bearers or a proper timber platform. That can easily cost more than the shed itself, and if you skip it, the building will rack and leak within two winters.

Fixings and treatment. New screws, a tin of preservative, sealant, and a couple of vents. Call it £50 and a weekend.

Add it up honestly and a £250 shed often lands somewhere between £500 and £800 all-in. That's still cheaper than new, but it's not the bargain the listing implies — and it doesn't include your time.

When the cheap shed genuinely is good value

There are real wins. A shed that's two or three years old, still on a proper base, with sound felt and dry timber, is worth buying — you're getting a building that has already proved it stands up to weather while avoiding the new price. Similarly, a well-made shed from a decent manufacturer, even at ten years old, is usually better than a new budget one made of thin cladding and thinner framing.

The ones to avoid are the sheds that have been sitting under a tree on soil for a decade, with felt that's given up and a bottom rail that's gone soft. Those aren't cheap sheds. They're firewood with a door.

A twenty-minute pre-purchase routine

Ask for the age and the base. Walk the roof line from a distance. Press the bottom rail on all four walls. Look for daylight through joints. Check the roof boards from inside for staining. Smell the interior. Test the floor with your boot. Measure the door opening diagonally both ways. Then stand back and ask yourself whether, after a day of dismantling and another of rebuilding, you'd still be pleased with it.

If the answer is yes, hand over the money. If you're unsure, there's another listing along in a fortnight — there always is.