Staircase Landing Requirements in Ontario: OBC Compliance Guide 2026

If you’re planning a custom staircase in Ontario, understanding landing requirements under the Ontario Building Code (OBC) is essential before design begins. Landings affect safety, code compliance, and how your staircase flows through your home. At C.O.R.S Staircases in Barrie, Ontario, our P.Eng-stamped designs include full OBC compliance review for every project.

When Is a Staircase Landing Required in Ontario?

The Ontario Building Code (OBC Part 9, Section 9.8.4) requires an intermediate landing whenever a staircase changes direction — for example, at an L-shaped or U-shaped turn. A landing is also required at the top and bottom of every staircase run. For straight staircases, the top floor level and the bottom floor level serve as the top and bottom landings respectively, so no intermediate landing is needed for most single-flight residential stairs.

Where a staircase does change direction, the landing must be provided at the point of direction change. This applies to quarter-turn, half-turn, and winder configurations.

Minimum Landing Dimensions Under the OBC

OBC Part 9 sets the following minimum dimensions for staircase landings in residential buildings:

For most residential staircases in Ontario, the minimum landing depth is 860mm — roughly 34 inches. A 910mm (36-inch) landing depth is commonly specified by C.O.R.S to provide comfortable clearance and simplify permit approvals in most Simcoe County municipalities.

Ontario Building Code Staircase Rise and Run — Landing Connection

Landings must connect correctly to the adjacent stair runs. The OBC staircase rise and run requirements for the flights meeting the landing are:

• Rise: 125mm minimum, 200mm maximum per step
• Run: 210mm minimum (closed riser), 250mm minimum (open riser)
• Stair width: 860mm minimum clear width
• Nosing: 6mm minimum, 13mm maximum overhang past the riser face

The landing must be level (not sloped) and constructed as a structural platform. For floating staircase designs, landing platforms require separate engineering if cantilevered or floating.

Minimum Stair Nosing Overhand Requirements

The nosing overhand — the amount each tread extends past the riser face below it — must be between 6mm and 13mm under OBC Part 9. Nosing must be consistent throughout the staircase; inconsistent nosings are a common reason for building inspection failures. At C.O.R.S, every staircase is dry-fitted in our workshop before delivery to confirm uniform nosing across every tread.

OBC Landing Requirements for Winder Stairs

Winder stairs — which use triangular treads to turn corners without a rectangular landing — have specific OBC requirements. Under OBC Section 9.8.4.5:

• The minimum tread width at the narrow point must be at least 150mm
• The tread width measured 300mm from the narrow end must meet the standard 210mm minimum run requirement
• Winders are permitted only where a standard rectangular landing would be impractical

C.O.R.S does not recommend winders for primary residential staircases due to comfort and safety considerations. A well-designed L-shaped landing with proper dimensions is always preferable.

Landing Design Options for Custom Staircases

Landings don’t have to be utilitarian. At C.O.R.S, we design landings as architectural features:

• Floating landing platforms: Structural steel channel frames with matching hardwood tread surface — visually continuous with the staircase design
• Glass landing panels: Where a landing is elevated above a lower level, glass infill panels satisfy the OBC guard requirement (900mm height on stairs, 1,070mm at landings) while maintaining sightlines
• Expanded landing zones: Some clients extend landings beyond the OBC minimum to create a small mezzanine or reading alcove — the minimum is just the floor, not the ceiling

Do Floating Staircase Landings Have Special Requirements?

Yes. Floating staircase landings — those elevated above the floor level below without traditional framing support — require P.Eng engineering sign-off in Ontario. The landing platform must demonstrate adequate load capacity (minimum 2.4 kPa live load for residential, per OBC Part 4 or 9 depending on building type) and be anchored to the wall framing or structural beam with appropriate connections.

C.O.R.S includes P.Eng structural engineering for all floating landing platforms at no additional cost. Your building permit application includes stamped drawings confirming landing structural adequacy.

What Happens If Landing Requirements Aren’t Met?

Staircases that don’t meet OBC landing requirements will fail the building inspection. The consequences:

• Occupancy permit can be withheld until the staircase is brought into compliance
• Retrofitting a non-compliant landing after installation is expensive — it often requires modifying the stair opening, which means structural carpentry work in addition to staircase re-fabrication
• Property insurance claims related to staircase falls may be denied if the staircase was not built to code

C.O.R.S submits building permit applications on behalf of clients and coordinates directly with the local building department. Every staircase leaves our shop with OBC compliance confirmed.

Frequently Asked Questions — Staircase Landing Requirements Ontario

What is the minimum landing size for stairs in Ontario?

The minimum landing size for stairs in Ontario under OBC Part 9 is 860mm deep (measured in the direction of travel) by at least the width of the staircase (minimum 860mm). In practice, most compliant residential staircase landings in Ontario are 860mm × 860mm square at minimum. C.O.R.S typically designs to 910mm depth for permit approval ease.

Is a landing required at the top and bottom of stairs?

Yes. The OBC requires a landing at both the top and bottom of every staircase. For most single-flight residential stairs, the floor levels above and below serve as the top and bottom landings. No separate intermediate landing is required for a straight single-flight staircase — only for direction changes.

What are the Ontario building code staircase rise and run requirements?

Under OBC Part 9: rise must be 125mm–200mm per step, run must be at least 210mm for closed riser stairs and 250mm for open riser stairs, and stair width must be at least 860mm clear. Nosing overhang must be 6mm–13mm. These specifications apply to all residential staircases in Ontario built under OBC Part 9.

What is the OBC landing requirement for staircase changes of direction?

Whenever a staircase changes direction — at an L-shaped or U-shaped turn — the OBC requires a rectangular landing at least 860mm deep and at least as wide as the staircase. The landing must be level (no slope). Winder stairs are an alternative to landings but have their own OBC geometry requirements.

How much does it cost to add a landing to a custom staircase?

Landing platforms for custom staircases in Ontario typically add $800–$2,500 to a staircase project, depending on whether the landing is a simple framed platform (lower cost) or a floating structural steel platform with matching hardwood surface (higher cost). C.O.R.S provides itemized quotes that list the landing platform separately from the stair flights.

What are the guardrail height requirements at a staircase landing in Ontario?

At a staircase landing, the guardrail must be at least 1,070mm (approximately 42 inches) above the landing surface — higher than the 900mm minimum on the stair flights themselves. This 1,070mm minimum applies anywhere the landing edge is more than 600mm above the floor below. See our full guardrail height Ontario OBC guide for complete specifications.

Internal Resources — OBC Staircase Compliance

Related C.O.R.S guides for Ontario Building Code staircase compliance:

• Handrail height requirements Ontario — 865mm–965mm above nosing line, OBC 9.8.7
• Guardrail height Ontario OBC — 900mm on stairs, 1,070mm at landings
• Ontario Building Code staircase requirements — complete guide
• Custom staircase cost Ontario 2026 — all-in pricing including permit and landing
• Floating staircase Ontario — P.Eng-stamped floating designs with landing platforms

Get a Custom Staircase Design That Meets Ontario Landing Requirements

C.O.R.S specialises exclusively in custom staircases throughout Ontario. Every design begins with a full OBC compliance check — including landing requirements, rise/run calculations, guardrail height, and handrail graspability. Our P.Eng partners provide sealed drawings for building permit applications in Barrie, Simcoe County, and the GTA.

No travel surcharge within Simcoe County. Call (705) 623-0371 or request a free quote online to discuss your staircase project.