All 4 plastic sheds in this collection, ranked on size for the money, guarantee and features. Use the finder to narrow them down.
Why it ranks here: low price per sq ft for a plastic shed, 12-year guarantee, well equipped (floor, windows, lock or double doors), 9% off the RRP.
Why it ranks here: low price per sq ft for a plastic shed, 15-year guarantee, well equipped (floor, windows, lock or double doors), 6% off the RRP.
Why it ranks here: mid-range price per sq ft, 15-year guarantee, well equipped (floor, windows, lock or double doors), 5% off the RRP.
Why it ranks here: mid-range price per sq ft, 15-year guarantee, well equipped (floor, windows, lock or double doors), 5% off the RRP.
How we score. The value score is our own sum from the listed specs and Shedstore's price. It is not a customer review and we have not tested the products. For a shed: 45% is price per square foot against other sheds, 25% is guarantee length, 20% is features (floor, windows, lock, double doors) and 10% is any saving off the RRP. Bases are scored on price per square foot and guarantee, storage boxes on price per litre, guarantee and lock. Give us your space and it becomes a match score that also rewards the products that make best use of it.
8x8 plastic sheds are the square middle size: big enough for a mower, two or three bikes and all the long-handled tools, small enough to tuck into the corner of an average back garden. Resin and polycarbonate walls won't rot, never need painting and shrug off the British weather.
This range has the Keter Factor, the Palram Canopia Rubicon and the Keter Newton Plus in 7'5 x 9' and 9' x 7'5, all sold by Shedstore. Need a little less room? See 8x6 plastic sheds. A bit more? Try 10x8 plastic sheds.
An 8ft x 8ft shed gives you about 5 to 6 square metres of floor, close to double a 6x4. The square shape is the big win. You can stand in the middle and reach every wall, so shelves go on three sides and nothing gets buried at the back the way it does in a long, narrow shed.
It's also the largest size that fits most gardens without dominating them, and every model here is under 2.5m tall, so all of them can sit right by a fence under permitted development (more on that below). A plastic garden shed of this size gives you:
Here's every model in the range side by side. Sizes are the makers' own figures in metres, width first. Prices change daily and the grid above always shows Shedstore's live price, so they're shown in bands.
| Shed | Size (ft) | Size inc. roof (m) | Floor space (m) | Ridge height | Door width | Floor | Snow load | Guarantee | Price band |
|---|---|---|---|---|---|---|---|---|---|
| Palram Canopia Rubicon | 8' x 8' | 2.37 x 2.29 | 2.27 x 2.29 base | 2.35m | 1.30m, ramp | Yes | 80kg/m² | 12 years | £900 to £1,000 |
| Keter Factor | 8' x 8' | 2.57 x 2.55 | 2.37 x 2.37 inside | 2.43m | 1.39m | Yes | 75kg/m² | 15 years | £1,000 to £1,200 |
| Keter Newton Plus 7'5 x 9' | 7'5 x 9' | 2.30 x 2.87 | 2.10 x 2.82 base | 2.46m | 1.39m | Yes | Not stated | 15 years | £1,500 to £1,600 |
| Keter Newton Plus 9' x 7'5 | 9' x 7'5 | 2.87 x 2.30 | 2.79 x 2.16 base | 2.46m | 1.39m | Yes | Not stated | 15 years | £1,500 to £1,600 |
Quick picks from the table:
The Factor is the Keter shed most people mean when they search for one, and the best all-rounder here. Its walls are resin panels reinforced by steel, with a beige wood-effect finish that resists denting, fading, peeling and rot. Outside it's 2.565 x 2.55m and 2.43m high. Inside you get 2.365 x 2.37m of clear floor on a heavy-duty resin floor that's included in the kit.
Light comes from one framed window, which you can fit on either side, and a skylight. Air vents help cut condensation. Two shelves with brackets come in the box. The 1.385m double doors have bolts and a padlock fixing. The apex roof is rated for a snow load of 75kg per square metre, Keter estimates the build at 4.5 hours for two people and gives a 15 year warranty. Other sizes are on our Keter Factor sheds page.
The Rubicon is the budget pick and a different kind of plastic shed. Its dark grey walls are fortified 10mm multi-wall polycarbonate, the hollow sheet used on conservatory roofs, on a rust-resistant aluminium frame. With the roof it measures 2.37 x 2.29m, and it's the lowest shed here at 2.35m.
There are no wall windows. Shingle-style skylight roof panels let soft daylight in while keeping the inside private. The double doors open 1.295m wide and 1.78m high with a ramped entrance for mowers and barrows, and the polycarbonate floor has an anti-slip finish. Palram tested the apex roof to a snow load of 80kg/m² and the whole shed to 115km/h (71mph) winds. It must be fixed to a solid, level base, and a free Hilti screw anchor kit is in the box. Warranty: 12 years. See the other sizes on our Palram Canopia sheds page.
The Newton Plus is the premium choice. It's built from double-wall Evotech resin with a wood-textured finish and steel reinforcement, on a heavy-duty floor. The 7'5 x 9' is 2.30m wide and 2.87m deep with its doors in the short end. The 9' x 7'5 is the same box turned round with a reverse apex roof, so the doors sit on the long side and you can reach both back corners easily.
Both have two Victorian-style windows, a full-length skylight, built-in vents and a modular layout that lets you choose where the doors and windows go. The lockable doors open 1.388m wide and 1.81m high, and the 1.89m eaves give the most headroom along the walls of any shed here. Ridge height is 2.46m and the guarantee is 15 years. Longer sizes, up to 7'5 x 17', are on our Keter Newton Plus sheds page.
Keter also makes the Stronghold in this size, but Shedstore only sells the Stronghold from 10x8 upwards, so it's on our Keter Stronghold sheds page rather than here.
As a guide, all of this fits at once with a walkway down the middle:
Use the height. Moulded panels don't take screws like timber, so use the shelving and brackets made for them. The Factor includes two shelves, and our shed shelving page has more. If it's mainly for bikes, our plastic bike sheds are a smaller, cheaper fix.
"Plastic" covers a few different builds at this size:
Against a wooden shed, resin and polycarbonate win on upkeep and rot. Against a metal shed they suffer far less condensation and won't dent or rust. Our plastic vs wooden shed guide covers the trade-offs, and the toughest models are on heavy duty plastic sheds.
Every shed here has a floor, but a floor isn't a foundation. On lawn it sinks unevenly, the frame twists and the doors stop lining up. Lay a flat, level base at least as big as the shed's footprint: concrete, paving slabs or a gravel-filled plastic grid kit.
Each ProBASE grid is 500mm square in recycled plastic and filled with pea gravel, bought separately. Compare the kits on our 8x6 shed bases page (the 2.5m kit) and 10x8 shed bases page (the 3m kits). Got a slope? Use adjustable shed bases.
Usually not. In England a garden shed is permitted development if it meets a few rules. Within 2m of a boundary it can't be over 2.5m tall, and all four sheds here pass: the Rubicon is 2.35m, the Factor 2.43m and the Newton Plus 2.46m. The shed also can't go in front of the house, and outbuildings can't cover more than half the garden. Listed buildings and conservation areas have tighter limits, and Wales, Scotland and Northern Ireland set their own rules. The Planning Portal guide to outbuildings has the full rules for England.
All four arrive flat packed with instructions and need no cutting or sawing. Assembly of the Factor takes about 4.5 hours for two people, and the Rubicon uses Palram's sliding panel system. Build on a dry, still day, because big panels catch the wind. Delivery is by courier, so check the delivery charge, lead time and any postcode exclusions on each Shedstore product page before you order. Specs and manuals are on the makers' sites: Keter UK and Canopia by Palram.
None of these sheds comes with a padlock. The Factor has bolts and a padlock fixing, the Rubicon a sliding bolt and the Newton Plus a locking lever that takes one. For better security, fit a closed-shackle padlock, anchor the shed to its base and chain bikes inside. Alarms and stronger locks are on our shed security page.
About 2.4 x 2.4m, but it varies by maker. The Rubicon is 2.37 x 2.29m with its roof, and the Keter Factor is 2.57 x 2.55m outside with 2.37 x 2.37m of floor inside.
For most gardens the Keter Factor: resin walls, a floor, two shelves and a 15 year warranty. On a budget, the Palram Canopia Rubicon costs less and weighs half as much. For the most headroom and two windows, choose the Newton Plus.
Yes. A heavy-duty resin floor is in the kit. You still need a level concrete, slab or grid base underneath.
No. Lawn is too soft and uneven. Lay a solid base first, or the panels will twist and the doors won't close properly.
These are backed for 12 to 15 years, and the panels won't rot or rust, so maintenance is close to nil. On a level base, kept clear of heavy snow and leaves, a well-built shed should outlast its warranty.
Any closed shed can, and ventilation is the fix. The Factor and Newton Plus have vents built in. Keep the base dry, let wet tools dry before storing them and keep cushions in a sealed box.
Yes. The Factor has one window you can fit on either side, and the Newton Plus has two. The Rubicon uses a skylight roof instead. See every model with a floor on our plastic sheds with floors page, or all the brand's sizes on Keter sheds.
