Question 1

What are the window requirements for a legal basement apartment?

Accepted Answer

Legal basement apartments in Ottawa must meet specific window requirements for egress (emergency exit) and natural light. The Ontario Building Code requires at least one window in each bedroom that can serve as an emergency exit, plus windows for natural light in living areas.

Egress window requirements are the most critical for basement apartments. Each bedroom must have a window with a minimum opening area of 0.35 square meters (about 3.8 square feet) and no dimension less than 380mm (15 inch

Question 2

What building code requirements apply to windows in Ottawa?

Accepted Answer

Window installations in Ottawa must comply with the Ontario Building Code (OBC) along with local Ottawa bylaws. Most window replacements in existing openings don't require permits, but there are specific requirements for safety, energy efficiency, and structural integrity.

Energy efficiency standards are a key requirement under the OBC. New windows must meet minimum thermal performance standards, with ENERGY STAR certification typically required for windows in Ottawa's Climate Zone 6. This mean

Question 3

Can I add a window to an exterior wall without a permit?

Accepted Answer

Adding a new window to an exterior wall requires a building permit in Ottawa. This is considered a structural modification that affects the building envelope and requires professional engineering assessment.

Why permits are required for new window openings: Creating a new opening in an exterior wall involves cutting through structural elements like studs, potentially affecting the wall's load-bearing capacity. The work must comply with Ontario Building Code requirements for structural integrity

Permits & Building Code

What are the window requirements for a legal basement apartment?

What building code requirements apply to windows in Ottawa?

Can I add a window to an exterior wall without a permit?