Stair Regulations in Queensland (QLD)

Understanding stair regulations in Queensland is essential for any homeowner planning a staircase project. Whether you're building a new home in Brisbane, renovating in Moreton Bay or adding external stairs on the Sunshine Coast, all staircase construction must comply with the National Construction Code (NCC) as adopted under Queensland law.

QLD Regulatory Framework

Queensland adopts the National Construction Code (NCC) through the Building Act 1975 and the Queensland Development Code (QDC). The NCC sets the technical standards for staircase design, while the Queensland Building and Construction Commission (QBCC) regulates licensing and compliance enforcement.

The key NCC references for residential staircases are:

• NCC Volume 2, Part 3.9.1 — Stair construction requirements for Class 1 buildings
• AS 1657 — Fixed platforms, walkways, stairways and ladders (referenced for certain applications)
• NCC Volume 2, Part 3.9.2 — Balustrade and barrier requirements

Residential Stair Requirements

The NCC sets the following requirements for residential staircases in Queensland:

• Riser height — 115mm minimum, 190mm maximum
• Tread going — 240mm minimum
• Riser/going formula — 2R + G = 550mm to 700mm
• Maximum risers per flight — 18 before a landing is required
• Minimum staircase width — 600mm (860mm+ standard for comfort)
• Headroom — Minimum 2,000mm vertical clearance from the nosing line
• Riser consistency — Maximum 5mm variation between risers in a flight

For a detailed breakdown of dimensions, see our guide to Australian staircase design rules.

External Stair Requirements

External staircases in Queensland face additional requirements due to the subtropical climate:

• Slip resistance — External treads must achieve appropriate slip resistance ratings (R10 or higher for wet areas)
• Drainage — Landings must have a gradient of 1:50 to shed water
• Durability — Materials must be suitable for external exposure, with appropriate durability ratings for timber
• Termite management — Timber in contact with or near the ground must have adequate termite protection

Learn more about outdoor stairs in Brisbane and material selection for external applications.

Handrails & Balustrades

Queensland follows the NCC requirements for handrails and balustrades:

• Handrail height — 865mm to 1000mm from the nosing line
• Balustrade height — Minimum 865mm on the stair flight, 1000mm on landings
• Gap restrictions — No opening allowing a 125mm sphere to pass through
• Climbability — No horizontal elements between 150mm and 760mm that create a climbing hazard
• Structural loading — Balustrades must withstand 0.60kN/m horizontal force

QBCC Licensing Requirements

In Queensland, staircase construction is classified as building work and must be performed by a QBCC licensed contractor. The relevant licence classes include:

• Builder — Open for complete staircase projects as part of a building contract
• Carpentry for timber staircase construction
• Stairbuilding (specialist trade licence) for dedicated staircase fabrication and installation

Craftsman Stairs holds QBCC Licence #69007, authorising us to design, manufacture and install staircases across all of South East Queensland.

Building Approval Process

New staircase construction in Queensland typically requires:

• Building development approval from your local council or a private building certifier
• Plans and specifications showing the staircase design complies with the NCC
• Inspections during and after construction by a registered building certifier
• Final inspection and certificate of classification upon completion

For more on the approval process, see our article on planning permission for staircases. Contact Craftsman Stairs for a free quote and expert guidance on regulatory compliance for your staircase project.

Frequently Asked Questions