What Size Storage Shed Do I Need? A Complete Buyer’s Guide

You’re standing in the shed aisle or scrolling online, and the options are all over the place. Tiny 4×6 boxes next to 12×20 structures that basically qualify as small barns. So what size storage shed do you actually need?

It depends on what you’re storing, how much yard you have, and whether your local building department cares about what you build. Let me help you figure it out without the guesswork.

Why Getting the Size Right Actually Matters

A shed that’s too small means you’re stuffing a riding mower in sideways and leaving half your tools outside. One that’s too big eats up yard space you could use for a garden or fire pit, plus costs more than you needed to spend.

The right size saves you money, keeps your stuff accessible, and doesn’t overwhelm your yard. Property agents will tell you a well-placed shed at the right scale can help with curb appeal too, but I think that mostly applies to wooden sheds that match your house. Nobody’s buying a home because of a dented metal box in the corner.

Step 1: Figure Out What You’re Actually Storing

I know this sounds obvious, but most people skip it. Walk around your garage, basement, and yard. Write down every single thing that needs a home. Be honest about what you actually use versus what you’ve been meaning to throw away for three years.

Small sheds (4×6 to 6×8)

These work if your list looks like:

• Hand tools – shovels, rakes, hoes
• A push lawn mower
• Garden hoses and sprinklers
• Potting soil and fertilizer bags
• One or two bikes
• Outdoor cushions and small patio furniture

You get about 200 to 400 cubic feet. They fit in narrow side yards where a bigger shed just wouldn’t go.

Medium sheds (8×10 to 10×12)

This is the sweet spot for most people. These hold:

• A riding lawn mower or garden tractor
• Wheelbarrow
• Full set of yard tools
• Pressure washer
• Gas cans and lawn chemicals
• Bikes for a family of four
• A small workbench if you keep it tidy
• Seasonal decorations in bins

About 800 to 1,200 cubic feet. Handles what a typical homeowner needs without making the backyard feel cramped.

Large sheds (10×14 to 12×20)

These are for people with serious storage needs or big properties. You might need one if you have:

• Multiple riding mowers or ATVs
• A full woodworking or mechanics shop
• A tractor with attachments
• A boat or small watercraft
• Firewood storage
• Home gym equipment
• More stuff than you probably want to admit

These give you 1,400 to 2,400 cubic feet. They also usually require permits and more foundation work.

Step 2: Measure Your Yard (The Right Way)

Once you know what’s going inside, grab a tape measure and head outside. Here’s what matters:

• Setbacks. Most towns require sheds to be at least 5 to 10 feet from property lines.
• Easements. Check if there are utility easements where you can’t build.
• Access. You need a clear path to move equipment in and out.
• Door swing. A 5-foot door needs 5 feet of clearance to open.

A quick trick: mark the shed footprint with stakes and string. Leave it there for a couple days. If it feels like it’s swallowing your yard, size down. If it looks tiny, size up.

Step 3: Doors and Ceiling Height Matter More Than You Think

Here’s something a lot of people miss. Floor space isn’t the whole story. If you can’t get your mower through the door or you keep bumping your head on shelves, the square footage doesn’t help.

Standard shed doors are 4 to 6 feet wide. If you’re parking a riding mower, go with double doors or at least a 5-foot-wide single door. Trust me on this. I’ve heard from too many people who bought a shed and realized their mower doesn’t fit through the opening.

Ceiling height is the other hidden problem. Standard walls are 6 to 7 feet. If you’re tall or want shelving on the walls, look for 7- or 8-foot walls with a peaked roof that gives more headroom in the center.

Step 4: Don’t Forget About Vertical Storage

Good shelving can make a small shed feel twice as big. Wall hooks for long tools, clear bins on shelves, overhead racks for light stuff like pool noodles or camping gear.

A 6×8 shed with good organization can hold as much as an 8×10 shed where everything just gets piled on the floor. Shelves and hooks pay for themselves fast.

If you need a solid shelving setup, the Suncast Shed 2-Shelf Wall Mounted Storage Shelving is a popular pick. It’s made of heavy-duty resin, holds a lot of weight, and bolts right into your shed walls. Priced around $120, it’s cheaper than upsizing your shed.

Shed Size Cheat Sheet

Don’t Skip the Permit Check

Check with your local building department before you buy anything. Most places require a permit once the shed hits 120 square feet (that’s 10×12). Some are stricter and require permits for anything over 100 square feet.

I’ve heard stories of people getting fined and told to tear down a shed because they skipped the permit. It’s a five-minute phone call that saves you a headache.

How Your Shed Material Affects Size and Cost

Metal sheds like the ones in our metal sheds collection are cheap and come in most sizes. They resist fire and pests but can dent and might sweat in humid weather.

Wooden sheds let you customize more and look better. Check out our wood sheds collection for options you can paint or stain. They handle custom sizes better than metal or resin.

Resin sheds are light, rust-proof, and nearly maintenance-free. They top out around 8×10 though, so not great if you need something bigger.

What I’d Recommend

For the average homeowner on a typical suburban lot with a riding mower and basic yard tools, an 8×10 shed is the right call. It gives you 80 square feet of floor space, room for a mower and wheelbarrow, tool storage, and some seasonal stuff, without turning your yard into a construction site.

If you only have hand tools and a push mower, save the money and go with a 6×8. You won’t miss the extra space.

For hobbyists or anyone with a larger property, jump to 10×12 or bigger. Extra space is almost always better than not enough, and you’ll appreciate it every time you walk in.

Frequently Asked Questions

Can I fit a riding lawn mower in a 6×8 shed?
It’s going to be tight. Most riding mowers need about 5×7 feet of floor space plus room to get on and off. An 8×10 is way more comfortable.

How much does a storage shed cost?
Small metal sheds start around $300. Big wooden sheds can go over $10,000 with installation. Check our full catalog to see current prices.

Do I need a foundation?
Yes. Every shed needs a level base. Gravel pads work for metal sheds. Concrete blocks or a slab are better for wooden sheds. If you’re buying an Arrow shed, the Arrow FDN109 Shed Floor Base Kit is built to match their 8×8, 10×8, and 10×9 sheds and makes the foundation step a lot easier.

What size shed can I build without a permit?
120 square feet (10×12) is the most common cutoff, but check with your local building department to be sure.

Final Thoughts

Start with what you need to store. Measure your yard. Check the permit rules. Pick a size that fits all three. The right shed size is one you don’t have to think about again after it’s set up.

Browse our selection of metal, wood, and resin sheds to find the right fit for your home.