Shed Calculator
Size the shed, choose how it is built and add a foundation to get an installed cost range for a garden or storage building.
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Estimated cost
$2,880 – $8,040
Typical figure around $5,460.
- Floor area
- 120 sq ft
- Foundation area
- 120 sq ft
Installed price including delivery, assembly and the selected foundation. Site prep, a gravel pad and permits are extra.
Planning estimate only — confirm quantities with your supplier or contractor before ordering.
How this estimate is calculated
The estimate is built from length (ft), width (ft), build type and foundation, then priced at national average rates. It reports floor area and foundation area, with quantities rounded up so you are never short of material and the standard waste allowance already included where it applies.
Installed price including delivery, assembly and the selected foundation. Site prep, a gravel pad and permits are extra.
The dollar range is a national average, so treat it as a starting point rather than a bid. Labor rates, permit fees and material delivery differ by region — the state table below shows how your state compares, and construction cost by state breaks the picture down further.
Cost by build type
Each row prices the same default job shown in the calculator above, changing only the build type. Use it to see what the upgrade or the cheaper option really costs before you commit.
| Build type | Low | High |
|---|---|---|
| Prefab kit (metal or resin) | $2,880 | $8,040 |
| Wood, site-built | $5,520 | $13,440 |
| Custom or lofted | $9,120 | $23,040 |
What the same job costs by state
Every row applies that state's construction cost index to the national range calculated above. The index bundles local labor rates, permit fees and material delivery, so it is a planning figure rather than a bid.
| State | Index | Low | High |
|---|---|---|---|
| Ohio | 0.92 | $2,650 | $7,397 |
| Texas | 0.93 | $2,678 | $7,477 |
| North Carolina | 0.94 | $2,707 | $7,558 |
| Georgia | 0.95 | $2,736 | $7,638 |
| Arizona | 1.01 | $2,909 | $8,120 |
| Florida | 1.02 | $2,938 | $8,201 |
| Pennsylvania | 1.03 | $2,966 | $8,281 |
| Illinois | 1.05 | $3,024 | $8,442 |
| Colorado | 1.08 | $3,110 | $8,683 |
| Washington | 1.15 | $3,312 | $9,246 |
| California | 1.32 | $3,802 | $10,613 |
| New York | 1.42 | $4,090 | $11,417 |
Index 1.00 is the national average. See construction cost by state for metro-level figures and the projects homeowners ask about most.
Frequently asked questions
How much does a shed cost per square foot?
Prefab metal or resin kits run about $18 to $55 per square foot installed, a site-built wood shed about $40 to $100, and a custom or lofted building $70 to $180. The foundation and site prep are billed on top.
How much does a 10 × 12 shed cost?
At 120 square feet, a prefab kit lands near $2,200 to $6,600, a site-built wood shed near $4,800 to $12,000, and a custom building from about $8,400 upward. Adding a concrete slab puts roughly $1,000 to $1,900 on top.
Do I need a permit for a storage shed?
Most jurisdictions require a permit above 100 to 200 square feet, or when the shed has electricity or plumbing. Rules vary by county and by HOA, so check the local building department before ordering the kit.
Is a shed kit cheaper than building one?
A kit is almost always cheaper and faster: the panels arrive cut and drilled, so assembly takes a weekend. A site-built shed costs more but lets you match the house, insulate the walls and size the doors to whatever you store.
Does this cost change from state to state?
Yes. Applying each state's construction cost index to the national range of $2,880 to $8,040, the same job runs from about $2,650 to $7,397 in Ohio (index 0.92) to $4,090 to $11,417 in New York (index 1.42).
What is not included in this estimate?
Installed price including delivery, assembly and the selected foundation. Site prep, a gravel pad and permits are extra. The figure is a national planning average for the work described above, not a contractor's quote.
