The Ranking
Our top 5 deck builders in Calgary
Calgary is hard on decks. Chinook winds can push a January afternoon well above freezing and drop it back below zero by night, so boards, fasteners and footings go through more freeze and thaw cycles than in most Canadian cities. Strong sun at this altitude fades stain quickly, and summer hail tests any surface left uncovered. That is why so many Calgary homeowners now ask for composite or PVC boards, or a waterproof vinyl membrane on decks that sit over a garage or living space. Pressure treated lumber and cedar still cost less up front, but they need sealing or staining every few years, while capped composite usually needs washing and nothing more. Several builders here carry manufacturer certification for Trex, TimberTech, Fiberon or Deckorators, which matters when you want the long product warranty honoured.
What holds a deck up matters more than the boards. Footings have to sit below frost depth so the ground cannot heave them, and the City of Calgary asks for a deck plan and a cross section that show the footing type and size. Screwpile foundations can need drawings stamped by a professional engineer. A deck fastened to the house hangs off a ledger board, which should be bolted to the rim joist and flashed so water does not rot the wall behind it. Guards are required once the deck surface is more than 600 mm above the ground, and the required guard height goes up for decks that sit higher than 1.8 m, so ask your builder to put the railing height on the drawing.
The City's rules are specific. A building permit is required for any covered deck, meaning one with a pergola or roof, and for an uncovered deck whose surface is higher than 0.6 m above grade at any point. Rebuilding, extending or adding stairs to an existing deck above that height also needs one. A development permit is needed when the deck is at the front of the house, closer than 1.2 m to a side property line, closer than 6 m to the rear property line, or in or near a floodway. Wiring or plumbing adds a trade permit. If a roof is attached to the house, the City treats it as an addition; a freestanding pergola is treated as an accessory building. After approval you book the inspection yourself or through your builder.
Before anyone digs footing holes, submit a locate request through Utility Safety Partners, the Alberta locate service behind Click Before You Dig. Many newer Calgary communities also have architectural guidelines or a residents' association that sets materials and colours, so check those before you sign.
Alberta has no provincial licence for deck builders. Any contractor that takes a deposit before the work is done must hold a prepaid contractor licence from Service Alberta, and you can ask for a Workers' Compensation Board clearance letter to confirm the crew is covered. Get the warranty, the board and railing products, and who pulls the permit written into the contract.
