Storage listings (garage storage, basements, spare rooms, business storage and warehouse bays) are rented by the month.
The price is the monthly rate multiplied by the number of months. Parkeas counts a month as 30 days, so a 3-month booking ends 90 days after it starts, at the same time of day. The service fee (5% of the price plus $0.40) and 13% HST are added on top.
Example: $120 a month for 3 months is $360.00. The service fee is $18.40 and HST is $49.19, for a total of $427.59.
The listing's cancellation policy counts back from your move-in date and time. Once the booking has started, cancelling doesn't refund the remaining months, so check the policy before booking a long stay. See Cancel a booking and get a refund.
Parking is booked by the hour: from 1 hour up to All day (24 hours) per booking, up to 30 days ahead. If you park at the same place often, make it a recurring booking:

The Monthly Parking page (parkeas.com/monthly-parking) lists spaces whose hosts have set a monthly rate. When you book, parking is still priced by the hour as above, so always check the total on the booking card before you pay.