The answer
It depends on the seller, historical and intended use, business or commercial activity, subdivision and severance facts, relationship, and other circumstances. CRA guidance says supplies of land are generally taxable unless specifically exempt and provides individual vacant-land examples, so the contract and closing should not assume GST included, extra, exempt, or self-assessed without qualified review.
Calgary-specific context
The GST treatment can affect price, deposit, statement of adjustments, cash to close, registration, buyer self-assessment, and seller collection. Keep GST separate from income-tax and municipal property-tax questions.
What to do next
Have the accountant or tax lawyer and closing lawyer confirm the treatment and contract language before the offer becomes firm.
Verify before relying
Official sources for this topic
These sources explain the rules and records relevant to this topic. Check the current requirements for your property.
Check the current information at the linked source. Ask the appropriate professional how it applies to your property.
Important
This is general information, not mortgage, tax, or financial advice. Speak with a qualified professional before making financial decisions.