3 products, all sold by Shedstore
All 3 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, 10-year guarantee, well equipped (floor, windows, lock or double doors), 6% off the RRP.
Why it ranks here: mid-range price per sq ft, 10-year guarantee, well equipped (floor, windows, lock or double doors), 5% off the RRP.
Why it ranks here: higher price per sq ft than most, 10-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.
Keter Stronghold sheds are the biggest and toughest resin sheds the brand makes: 3.05m wide, 2.51m to the ridge, with a steel-reinforced roof and double doors wide enough for a ride-on mower. They suit anyone who has outgrown a small storage shed and wants a large wood-effect building that never needs painting.
Shedstore sells three grey sizes, 10x8, 10x11.5 and 10x15, and all three are listed below with their current prices. For other big models see our heavy duty plastic sheds, or compare every range on our Keter sheds page.
The Stronghold is the heavy-duty range in the brand's line-up. It is bigger, taller and stronger in the roof than the Factor and Newton Plus models, and it is built for people who need to store a lot: a ride-on mower, three or four bikes, furniture over winter and a wall of tools.
The walls are Evotech panels: double-wall resin with a moulded wood-grain finish, 19mm thick according to Wickes. From a few metres away the shed looks like painted timber, but it will not rot, peel, dent or rust, and it is UV-stabilised so the grey does not fade. Every size has the same features:
All three share the 3.05m width, the 2.51m ridge, 1.88m eaves, an internal height of 2.35m and the same doors. What changes is the depth. Figures are from the maker's UK spec sheets and the Shedstore listings; the grid above always shows the live price.
| Size | External (m) | Internal (m) | Foundation needed (m) | Floor area | Capacity | Weight | Price band |
|---|---|---|---|---|---|---|---|
| 10x8 | 3.05 x 2.43 | 2.92 x 2.22 | 3.00 x 2.38 | 7.4 sq m | 18.6 cu m | 184kg | about £1,500-£1,650 |
| 10x11.5 | 3.05 x 3.50 | 2.92 x 3.26 | 3.00 x 3.42 | 10.7 sq m | 26.8 cu m | 260kg | about £1,900-£2,100 |
| 10x15 | 3.05 x 4.53 | 2.92 x 4.31 | 3.00 x 4.46 | 13.8 sq m | 34.7 cu m | 315kg | about £2,400-£2,650 |
The 10x8 gives 2.92m by 2.22m inside, which takes a ride-on mower side-on with bikes along the back wall. To compare it with other brands at the same footprint, see our 10x8 plastic sheds.
The middle size adds just over a metre of depth, enough for a bench or a run of shelving at the back without blocking the mower at the front.
At 13.8 sq m this is one of the largest resin sheds on sale in the UK. It works as a workshop or a store for furniture, bikes and a mower together. More buildings this size are on our large plastic sheds page.
The maker also sells the larger sizes in brown, plus a Stronghold 8x6 and 8x8 apex and a Belfort pent shed in 8x6. Shedstore lists only the three grey 10ft models, so those are the ones here. The 8ft sizes are 2.52m wide and rated for a lower snow load of 100kg per sq m. The brown versions share the grey specs, so everything on this page applies to a brown Stronghold too.
The UK spec sheet gives a snow load of 150kg per sq m for the three 10ft sizes. Some listings quote "20 PSF" instead. That is the US figure in pounds per square foot, roughly 98kg per sq m, so the two numbers are not comparable. Either way the reinforced roof copes with a normal UK winter. Brush heavy drifts off anyway, because wet snow is heavy and storm damage is not covered.
Wind matters more than snow in most UK gardens. A tall shed with large flat sides catches the wind, so retailers state it must be anchored to the foundation, with screws to suit the surface; those fixings are not in the box. Turn the doors away from the prevailing wind and keep them shut when you are not using it.
Every Stronghold needs a firm, flat, level foundation at least the size in the table. Grass, soil and loose sand will move and pull the doors out of line. Good options:
Our 10x8 and large shed base kits cover these footprints, and adjustable shed bases help on a slope. Leave 60cm clear on all four sides for assembly and cleaning.
Delivery of the 10x8 comes in three boxes, the longest just under 2m and the heaviest about 103kg; the bigger sizes add weight, up to 315kg in total for the 10x15. Check the route from the kerb before you order, as the boxes must fit through a side gate or the house. For assembly you need:
Assembly is bolt-together with no cutting, and the instructions are in the box. Build the floor first and square it on the foundation, then walls, roof beams and doors. If a part is missing or damaged on delivery (check every box before assembly starts), order spare parts direct from the maker.
The 3-point lock makes the doors much harder to lever apart than a single hasp, and the ergonomic handle takes a padlock (not included). The panels bolt together from the inside, so there are no outside screws to undo. For alarms, ground anchors and locks see shed security.
The main differences from the other big plastic sheds Shedstore sells:
| Range | Walls | Width | Ridge height | Floor | Warranty |
|---|---|---|---|---|---|
| Stronghold | Evotech resin, wood look, steel roof | 3.05m | 2.51m | Included | 10 years |
| Newton Plus | Evotech, steel reinforced | 2.30m deep, up to 5.39m long | 2.46m | Included | 15 years |
| Factor | Beige wood-effect panels | up to 2.57m | 2.43m | Included | 15 years |
| Palram Canopia Yukon | 10mm polycarbonate on aluminium | 3.32m | 2.52m | Some sizes | 15 years |
Choose the Stronghold for the widest doors and the best snow rating in a wood-effect shed. The Keter Newton Plus fits a narrow plot and has a longer warranty, the Keter Factor is the cheaper choice, and the Yukon on our Palram Canopia sheds page has a more modern look.
Usually not, but the Stronghold sits right on one limit. In England an outbuilding is normally permitted development if it is not in front of the house, covers no more than half the land around it, and is no taller than 2.5m within 2m of a boundary. The ridge is 2.51m, so place it more than 2m from the fence or ask your council. The Planning Portal guide to outbuildings has the detail; Wales, Scotland and Northern Ireland differ a little.
Under the gable roof the walls are your best storage space for garden tools. The maker sells a wall-mount tool organiser and shelving kits for its sheds, or use freestanding units from shed shelving. The skylight and windows give good daylight; for winter evenings see shed lighting. Full specs are on the maker's Stronghold 10x8 page.
For a large, low-upkeep shed it is one of the best options: no painting, a reinforced roof with a 150kg per sq m snow load, doors that take a ride-on mower and a floor included. The trade-offs are a higher price than a timber shed of the same size and a 10 year warranty rather than 15.
Yes. Every size has a heavy-duty floor in the kit. It still needs a level foundation underneath.
3.05m wide and 2.43m deep outside, 2.92m by 2.22m inside, 2.51m to the ridge, with an internal height of 2.35m. It needs a foundation of at least 3.00m by 2.38m.
No. The doors have 3-point locking and a fitting for your own padlock.
Any closed building can. The built-in ventilation keeps air moving; open the doors on dry days and do not put away a wet mower or damp cushions.
Faults in materials and manufacture. Wear and tear, fading, storms and other weather damage are excluded, so anchor the shed properly and register the warranty after you buy.
The panels are UV-stabilised and listed as weather resistant and fade resistant, so a grey or brown shed keeps its colour for years, though the warranty does not cover discolouration.
