What Size Storage Shed Do I Need? Resin vs. Metal Shed Guide
Buying a shed that is too small is the most common storage mistake. This guide helps you pick the right storage shed size, choose between resin and metal, and prepare the right base before your shed arrives.
Storage Shed Size Guide
| Shed size | Floor area | Best for |
|---|---|---|
| 8 x 6 ft | 48 sq ft | Garden tools, a push mower, two bikes |
| 8 x 8 ft | 64 sq ft | Tools plus pool supplies or patio cushions |
| 8 x 10 ft | 80 sq ft | The most popular size: room for shelving, bikes and a mower |
| 8 x 12 ft | 96 sq ft | Seasonal decor, larger tools and workbench space |
| 8 x 14 to 8 x 16 ft | 112–128 sq ft | Backyard workshop or bulky equipment |
| 12 x 30 ft | about 360 sq ft | Riding mowers, ATVs, motorcycles or a vehicle plus storage |
Tip: list everything you want to store, then add about 25% extra space for walking room and future purchases. Measure your largest item (like a mower) against the door opening.
Resin vs. Metal vs. Wood Sheds
- Resin (plastic) sheds – won't rot, rust or attract termites, never need painting and clean up with a hose. Many include a floor. Ideal for small to mid-size storage.
- Metal sheds and garages – the best value per square foot for large buildings; galvanized steel is strong and weather-resistant. Usually need a separate foundation.
- Wood sheds – classic look and easy to customize, but require regular painting or staining and can rot or attract pests.
Does the Shed Come With a Floor?
Many resin sheds include a plastic floor, which keeps tools off damp ground. Our resin storage shed with floor is available in six sizes from 8x6 to 8x16 ft. Large metal buildings typically do not include a floor and should sit on a concrete slab or compacted gravel base.
Choosing a Foundation
- Concrete slab – the strongest, most level option and best for metal garages.
- Patio pavers – a good DIY base for resin sheds.
- Compacted gravel – good drainage and budget-friendly.
- Treated wood platform – useful on sloped yards.
Whatever you choose, make sure it is level and slightly larger than the shed footprint, and anchor the shed against wind.
Do You Need a Permit for a Shed?
Many local codes exempt small sheds (often those under roughly 120 to 200 sq ft), but rules vary by city, county and HOA, and setbacks from property lines usually still apply. Large buildings like a 12x30 garage almost always need a permit. Check with your local building department before you order.
Our Recommendations
- For most backyards: the 8x10 resin storage shed with floor.
- For vehicles and big equipment: the 12x30 metal garage and storage shed with skylight roof panels.
All sheds ship free from a US warehouse and are typically delivered in 3–7 business days. Browse all sheds and outdoor storage.