Definitions
New housing price index
The New Housing Price Index is a monthly series that measures changes over time in the contractors' selling prices of new residential houses, where detailed specifications pertaining to each house remain the same between two consecutive periods. Learn more
Vacancy rate
Vacant space divided by, apartment, office or industrial market inventory, where vacant space is the sum of available, apartment, office or industrial market space as of the publication date. Vacant space excludes retail and below grade space. Learn more
Housing affordability index
The housing affordability index is meant to measure the share of disposable income that a representative household would put toward housing-related expenses. The measure is a ratio of housing-related costs (mortgage payments and utility fees) to average household disposable income. The higher the ratio, the more difficult it is to afford a home.
Calculation
Quarterly housing-related costs (denoted by c) are based on a series of monthly mortgage payments and utility fees that are calculated as follows:1
where r is the effective mortgage rate, which is a weighted average of discounted 1-, 3- and 5-year fixed-rate mortgages and the discounted variable-rate mortgage. The weights given to each interest rate are calculated from the Canadian Financial Monitor Survey provided by Ipsos Reid.2
N is the number of monthly payments (assumed to be 300 over 25 years) and M0 is the total value of the mortgage, where we assume a 95 per cent loan-to-value ratio, so that M0=(0.95)*P0.3 P0 is the 6-month moving average of the Multiple Listing Service average resale price; therefore, this measure strictly reflects existing homes and would include all housing types sold in Canada.
U refers to utility fees, which are based on the consumer price index for water, fuel and electricity.4 This series is scaled to the average level of spending on utilities by homeowners for their principal accommodation from the 2011 Survey of Household Spending.
The denominator, average household disposable income, is measured by using total quarterly household disposable income from the National Income and Expenditure Accounts, divided by the number of households in Canada. Our estimate of households is based on census data and is calculated using an extrapolative headship-rate method.5