12x12 Sheds

A 12 x 12 ft shed is 144 sq ft of storage: machines, a workbench and a wall of shelving with room to move between them. In this size you choose between the ShelterLogic Shed-in-a-Box, a steel frame under a polyethylene cover; the Arrow Classic, galvanized steel in three colours; and the Arrow Elite, Galvalume steel with a 15-year warranty.

At this size headroom stops being a compromise: the Classic 12x12 has 7′9″ at the peak and the Elite 8′4″. The Classic's matching floor frame kit is listed on this page. 144 sq ft is above the size many municipalities exempt from a permit, so check your bylaw before ordering. Smaller: 10x12; every size: sheds and storage buildings.

12x12 shed FAQ

Steel or fabric for a 12x12?

The Shed-in-a-Box costs about a quarter of the Arrow Classic and is quicker to put up, but its cover is the part that ages and the warranty is one year. The Arrow steel sheds lock, carry a 12- or 15-year warranty and are the better choice for a permanent building.

How big is it inside?

The Arrow Classic 12x12 is 11′9″ by 11′8″ inside with 7′9″ at the peak; the Elite is 11′10″ by 11′10″ with 8′4″; the Shed-in-a-Box is 12′1″ by 11′9″ with 8′5″.

Does a 12x12 need a permit?

Usually. At 144 sq ft it is over the accessory-building exemption in many Canadian municipalities, and a larger shed also has to respect setbacks and lot-coverage limits. Ask your building department before ordering.

What base does it need?

The Classic 12x12 bolts to its floor frame kit on a level gravel pad, or straight to a concrete slab; the Elite needs a slab or a built wooden platform. Anchor the steel sheds with the concrete anchor kit or the earth anchor kit.

Guides for 12x12 Sheds

All guides

Large Metal Sheds in Canada: 10x14 to 14x17 Compared

The step up from a 10x12 changes much more than floor area: the doors get wider but not taller, the base stops being optional and the kit arrives on a freight truck. We compare the large metal sheds we sell in Canada on area, height, door opening, pad footprint and delivery weight.
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Shed Foundations in Canada: Gravel Pad, Concrete Slab or Floor Frame Kit

Most steel sheds that fail early in Canada fail from the bottom up. This guide covers sizing the pad from the real foundation footprint, the four base types that work in a Canadian backyard, and the anchoring and snow-load details that keep a shed square.
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What Size Storage Shed Do You Need? 8x6 to 12x12 in Canada

An 8x6 shed is Canada's default size, but the door opening decides what actually fits inside. This guide compares the real interior dimensions, door widths, foundation pads and prices of steel sheds from 4x3 to 12x12, with snow-load and permit advice for Canadian yards.
10 min read
Best Outdoor Structures for Canadian Winters: Carports, Garages & Sheds

Need year-round vehicle and equipment protection in Canada? Compare steel carports, portable garages (ShelterTube vs ShelterCoat), and permanent steel buildings. Snow load ratings, climate zone recommendations, and sizing guides for every Canadian province.
7 min read
Snow Load Ratings Explained: What PSF Means for Canadian Carports & Garages

Snow load ratings are the most useful spec on a carport, portable garage or utility shelter — and the one buyers most often skim past. Here is what psf actually measures, which ratings really exist on the Canadian market, and how to match one to the winter your address gets.
10 min read