Basement
Understand what a basement is in Canadian homes, how it’s used, what types exist, and how it affects property value and legal standards.
June 06, 2025
What is a Basement?
A basement is the lowest level of a home, located below the main floor, which may be used for storage, utilities, living space, or rental purposes.
Why Basements Matter in Real Estate
In Canadian real estate, basements are valued for their functional space and potential to add income or living area, especially in urban markets.
Types of basements include:
- Full basement (finished or unfinished)
- Partial or crawl space
- Walk-out or garden-level basements
Basement features can affect market value, insurance, and utility costs. Finished basements must comply with egress and electrical code to be considered livable.
Understanding basement types, risks (e.g., flooding or radon), and renovation standards helps buyers and homeowners make informed decisions.
Example of a Basement
The buyer purchases a home with a legal secondary suite in the basement, providing rental income and helping qualify for a larger mortgage.
Key Takeaways
- Located below the ground floor
- Used for storage, living, or income
- Must meet code for legal occupancy
- Affects value, insurance, and utility usage
- Prone to moisture and radon issues
Related Terms
- Sump Pump
- Foundation
- Egress Window
- Finished Basement
- Rental Suite
6525 Mississauga Road and its surrounding context. (RBC Capital Markets & CBRE)
Property details for 6525 Mississauga Road. (RBC Capital Markets & CBRE)
National average resale-price growth and housing-starts growth, smoothed over three months. The comparison illustrates the cycle; it does not establish how much a price change causes construction to change.
Trailing 12-month starts in centres of 50,000 or more remove the usual monthly seasonality. Ownership combines the homeowner and condominium categories; rental is shown separately.
Six-month averages of provincial starts, expressed at annual rates. The smoothing reduces the influence of individual apartment projects.
The same August benchmark compared with two different starting points. Three-month changes are not annualized.
Average sale prices show the difference in purchase costs across markets. They do not measure affordability relative to local incomes or construction costs.
Newfoundland and Labrador remains above its pre-pandemic sales pattern, but August activity was below last year. Historical lines retain their original release vintages.
Average and median describe different aspects of the same month’s transactions. Both are affected by the mix of homes sold.
Category averages compare different homes and locations; the gaps are not estimates of the cost to upgrade an otherwise identical property.
The five categories shown account for 5,000 of the board’s 5,057 sales. The remaining 57 transactions were in other housing categories.
Monthly observations are not seasonally adjusted. Active listings count properties available at month-end; they are not construction inventory.
Average and median prices share one dollar axis. These unadjusted transaction measures do not control for changes in the homes sold.
TRREB’s 416/905 categories compare the apartments sold in each area. The difference does not isolate a location premium for equivalent units.
5680 Oak Street in Vancouver and its surrounding context. (MCMP Architects)
Ground-level renderings of the tower proposed for 5680 Oak Street in Vancouver. (MCMP Architects)