The steel costs the same in January as it does in July.

Your building is engineered, manufactured and priced the same way no matter when it ships. Engineering, permits, manufacturing and freight don't move either, and that's the majority of what you're paying for. Permits are often faster in winter, because building departments are quieter in January than in May.

What changes is what it takes to get the thing out of the ground and standing up in an Ontario winter.

We'd rather explain that now than have you find it on a quote later.

Concrete is where the money goes

If there's one thing to understand about winter pricing, it's this.

Under CSA A23.1, "cold weather" starts the moment the air temperature might drop below 5°C within 24 hours of the pour. In Ontario, that's most of November through March. Inside that window, a few things stop being optional.

Concrete has to be held at a minimum of 10°C for the full cure. That means blankets, hoarding or a heated enclosure, plus the propane, the heaters, the tank rentals, and someone checking on it.

It has to reach 7 MPa before its first freeze. Get that wrong and the pour is compromised. There's no fixing it afterward.

Frozen subgrade can't be built on. Footings in central Ontario go down four to five feet, and in January the top of that is solid.

None of it is padding. It's the standard, and a builder who skips it is handing you a foundation that will fail.

What else adds up

Site access. A loaded flatbed and a telehandler need a plowed, firm approach, which can mean a plow before every delivery day and again after every storm. Late March freeze thaw is often worse than deep January. Solid at 7 a.m., ruts by two in the afternoon.

Daylight and crew speed. Late December gives about nine hours of light here against more than fifteen in June, and nobody works at height in the dark. Gloved bolt up takes longer, warm up breaks are a safety requirement, and you can't fly wall or roof panels in a crosswind. Blizzard days don't cancel equipment rentals.

It's why a late February erection prices differently than a December one.

Where the premium actually lands

Here's the part most contractors won't put in writing.

The winter premium applies to the site and installation portion of your project, not to the whole thing. The building itself is a large share of your total cost, and it doesn't change. So a meaningful increase on the labour side often works out to a much smaller increase on the total.

Foundation heavy projects carry the most of it. Projects going onto an existing slab or engineered piers carry the least, sometimes very little.

We won't quote a winter premium as a flat percentage, because it isn't one. It depends on your foundation, your site, your access, and how much of the work lands in the deepest part of the season. Send us your details and we'll put a real number on it instead of a rule of thumb.

The lever most people miss

The premium isn't spread evenly. Concrete carries most of it.

Which means the single biggest thing you can do to cut a winter build's cost is get the foundation in before the ground freezes.

Footings and slab in late fall. Steel up over the winter. Interior work in the spring. You've moved the most weather sensitive part of the job out of the cold, and erection handles winter far better than concrete does.

If you're reading this in the fall, that's the conversation to have now, not in December.

Engineered piers and screw piles are the other route worth asking about. They don't have concrete's curing problem at all, and on the right site they take winter almost in stride.

What waiting costs

Spring isn't free either.

Spring is the crush. Everyone who decided to wait is calling in April. Permit offices slow down, concrete crews book out, erection crews book out. The quiet January calendar that lets us give you a firm date is gone by May.

Lead time doesn't care what season it is. Engineering, drawings and manufacturing take what they take. Waiting until spring to start usually means building in summer.

You lose a season of use. A building up in February is working for you in March. Deferred into the spring queue, it may not be usable until well into the summer.

Frozen ground isn't always the enemy. On soft, wet, low lying or hard to reach sites, it's the best access surface you'll get all year. Some builds are genuinely easier in February than in April.

How to decide

Winter usually makes sense if you need the building operational before next season, your foundation is already in or you're going on piers, your site is soft or remote when it isn't frozen, or you're replacing something that failed and can't wait.

Waiting usually makes sense if you need a large slab and the foundation isn't in yet, budget is the binding constraint and timing isn't, or there's no operational cost to you in waiting.

There's a third answer that suits a lot of projects. Foundation now, steel in the winter, finishing in the spring. Usually the cheapest version of "soon."

Final thought

The winter premium is real, and we'd rather explain it than bury it in a line item. It isn't a penalty and it isn't padding. It's the cost of doing the work properly in conditions that demand more. The alternative to paying for those things isn't saving money. It's a foundation that freezes before it cures.

Whether that cost is worth it depends entirely on what waiting costs you. Tell us your site and your timeline and we'll price both, honestly, side by side. Then you decide.

Garage and workshop size decisions are easy to underestimate.
Until you live with them.

If you’re planning a steel garage or multi-use space and want to get it right the first time, request a quote and we’ll walk through it with you.

Or reach out to our team with your questions — we’re here to guide you through engineering, permits, timelines, and everything in between.