How Big is a 16×20 Shed?
What Does 16×20 Actually Look Like?
This shed equals the size of a large single-car garage with extra length, or about 80% of a standard two-car garage. You could fit a full-size pickup truck with 8 feet of workshop space remaining, or park two compact cars with minimal walking space. The area matches a small one-bedroom apartment's living space.
Imagine a space that could hold a large RV or serve as a complete automotive bay with room for a car plus full tool storage along the walls.
A 16×20 shed delivers 320 square feet of versatile storage and workspace, representing the sweet spot between substantial capacity and manageable construction complexity. This rectangular configuration provides excellent interior layout flexibility while keeping material costs reasonable compared to larger barn-scale structures. The 16-foot width allows for standard truss construction without requiring engineered spans, while the 20-foot length maximizes storage capacity.
This size accommodates serious workshop operations, multiple vehicle storage, or extensive equipment collections while remaining within DIY construction capabilities for experienced builders. The 320 square feet provides enough space for walk-around access to stored items and comfortable workspace areas. Many property owners choose this dimension for combination uses - parking areas with workshop space, or seasonal storage with year-round hobby areas. The rectangular shape offers more wall space than square configurations, beneficial for tool storage and workbench placement.
What Fits in 16×20?
- Large riding mower plus complete lawn care equipment
- Full woodworking shop with major stationary tools
- Boat up to 18 feet with trailer storage
- Two motorcycles with maintenance workspace
- Complete seasonal decoration storage for large property
- Small RV or travel trailer
- Professional contractor tool and supply storage
Build vs Buy: 16×20 Shed
DIY Build
Good size for experienced DIY builders with standard construction methods
Pre-fab Kit
Several manufacturers offer kits in this popular size
Custom Built
Professional build recommended for complex electrical or plumbing
16×20 Shed Materials List
| Material | Quantity | Est. Cost |
|---|---|---|
| Roof trusses (2×6 construction) | 11 pieces | $1,650 |
| Pressure treated sill plates (2×6) | 240 linear feet | $480 |
| Wall framing lumber (2×4×8') | 38 pieces | $304 |
| Plywood sheathing (4×8 sheets) | 24 sheets | $1,200 |
| Metal roofing material | 420 sq ft | $675 |
| Concrete slab (4" thick) | 12 cubic yards | $1,440 |
| Overhead garage door (12×8) | 1 unit | $750 |
| Insulation (R-13 batts) | 25 rolls | $500 |
How Much Does a 16×20 Shed Cost?
Expect to pay between $6,500 and $28,000 to build. Building yourself is cheapest; prefab kits land in the middle; custom built is most expensive.
Common Uses for 16×20
Pro Tips
- ★ Frame the 16-foot end walls first and use them as templates to ensure the 20-foot side walls are perfectly parallel
- ★ Install windows on the long sides rather than ends to maximize natural light while preserving wall space for large door openings
- ★ Plan for 220V electrical service if you'll use welders, air compressors, or other high-power tools in your workshop area
Frequently Asked Questions
Can I build a 16×20 shed myself?
What's the best door configuration for a 16×20 shed?
How high should I build the walls?
One More Thing...
There's a photograph somewhere of me standing in the doorway, squinting at what Great-Uncle Morris left me. I'd never heard his name until the lawyer called. The shed looked enormous from outside—big enough for an RV, I thought. But stepping inside felt different. Cramped. His riding mower dominated the center, surrounded by woodworking tools arranged with mathematical precision. Every chisel, every clamp positioned exactly sixteen inches apart. The same spacing everywhere. I paced the walls. Sixteen feet one way, twenty the other. The lawyer had mentioned 320 square feet, but numbers on paper don't prepare you for the weight of inherited obsession. Morris had covered every surface with handwritten sequences. Measurements, angles, cutting patterns—all following some internal logic I couldn't crack. His final project sat unfinished: a cabinet with seventeen identical drawers, each marked with coordinates. I found his journal wedged behind the bandsaw. Page after page of calculations, refining his system for organizing everything by size, frequency of use, seasonal rotation. He'd spent forty years perfecting this dance between tools and space. Now I held the deed and the mystery of his method. The shed waited, patient as mathematics, for me to decide whether to honor his pattern or break it.