Should the basement in-law suite have its own thermostat control?

Yes, an in-law suite should absolutely have its own thermostat control - it's not just a convenience feature, it's typically required by the Ontario Building Code for secondary dwelling units and makes financial sense for both you and your tenant.

Separate climate control is essential for creating a truly independent living space. Your basement suite tenant needs to control their own comfort and energy costs, especially since basements naturally run cooler and may have different heating and cooling needs than the main floor. Without separate controls, you'll likely face ongoing disputes about temperature preferences and utility costs.

From a code perspective, the Ontario Building Code requires secondary dwelling units to have independent systems wherever practical. This includes separate electrical meters (when feasible) and independent HVAC controls. The City of Ottawa's secondary suite guidelines emphasize that tenants should have reasonable control over their living environment, which includes temperature management.

Installation options depend on your existing system. If you have a forced-air furnace, the most common solution is installing a zone control system with motorized dampers and a separate thermostat for the basement area. This typically costs $1,500 - $3,500 installed in Ottawa. For homes with older radiator systems, you might need a separate heating system entirely, such as a mini-split heat pump ($3,000 - $6,000) or electric baseboard with individual thermostats ($1,200 - $2,500).

Consider the tenant relationship benefits - separate controls eliminate the awkward conversations about temperature settings and who's responsible when utility bills spike. Many Ottawa landlords find that providing climate control independence actually allows them to charge slightly higher rent, as tenants value the autonomy and cost predictability.

Professional installation is crucial since HVAC modifications often require electrical work (which needs ESA permits) and proper system balancing to ensure adequate airflow throughout both units. A poorly installed zone system can actually increase your energy costs and create comfort problems in the main house.

For a comprehensive assessment of your basement suite HVAC needs and proper permitting, contact Ottawa Basements for a free consultation. We coordinate with licensed HVAC contractors to ensure your secondary suite meets all code requirements while maximizing comfort and efficiency.