Staircase Regulations & Compliance in QLD

Ensuring your staircase complies with Queensland building regulations protects your family's safety, your property's value and your legal position. This guide provides a comprehensive overview of staircase compliance requirements for homeowners in Brisbane, Moreton Bay and the Sunshine Coast.

Overview of QLD Compliance

Staircase construction in Queensland is regulated by the National Construction Code (NCC) as adopted under the Building Act 1975 and enforced by the Queensland Building and Construction Commission (QBCC). Compliance is mandatory for all new construction, renovations and alterations involving staircases.

The relevant sections of the NCC include:

• Part 3.9.1 — Stair construction (dimensions, landings, headroom)
• Part 3.9.2 — Balustrades and barriers
• Part 3.8.1 — Handrails
• Part 3.7.1 — Fire safety (egress staircases)

Key Regulations Summary

Here's a consolidated summary of the critical compliance requirements:

• Riser height: 115mm–190mm, consistent within 5mm (design rules)
• Tread going: Minimum 240mm
• Formula: 2R + G = 550mm–700mm
• Maximum risers per flight: 18 (riser limits)
• Headroom: Minimum 2,000mm
• Handrail height: 865mm–1,000mm (handrail details)
• Balustrade height: 865mm on flights, 1,000mm on landings (balustrade details)
• Gap restriction: No 125mm sphere passage
• Slip resistance: R10 minimum for external stairs (slip resistance guide)
• Lighting: Adequate illumination with two-way switching (lighting guidelines)

Compliance Checklist

Use this checklist to verify your staircase meets QLD requirements:

• ☐ All risers between 115mm and 190mm with maximum 5mm variation
• ☐ All treads have a minimum going of 240mm
• ☐ 2R + G formula satisfied (550mm–700mm)
• ☐ No more than 18 risers per flight
• ☐ Landings at least 750mm deep and equal to staircase width
• ☐ Headroom clearance at least 2,000mm throughout
• ☐ Handrails on required sides at correct height (865mm–1,000mm)
• ☐ Handrails graspable (32mm–65mm diameter or equivalent)
• ☐ Handrails extend 300mm+ beyond top and bottom risers
• ☐ Balustrades at correct height (865mm flights, 1,000mm landings)
• ☐ No gaps allowing 125mm sphere to pass through
• ☐ No climbable horizontal elements between 150mm–760mm
• ☐ External treads have adequate slip resistance
• ☐ Adequate lighting with two-way switching
• ☐ Built by QBCC licensed builder

Risks of Non-Compliance

• Failed inspections — Building certifiers will not approve non-compliant work
• Council orders — Local councils can issue show cause or rectification notices
• Insurance issues — Insurers may reject claims for injuries on non-compliant staircases
• Liability — Property owners can be held legally liable for injuries caused by non-compliant structures
• Sale difficulties — Non-compliant building work must be disclosed and can significantly reduce property value

Certification Process

• Building approval — Submit plans to a registered building certifier before construction begins
• Frame inspection — Certifier inspects structural elements before they're concealed
• Final inspection — Completed staircase is inspected for compliance with approved plans and the NCC
• Certificate of classification — Issued when all work is approved as compliant

Existing Staircases

Staircases built under previous versions of the building code are generally not required to be upgraded unless significant work is undertaken. However, if you're renovating or altering an existing staircase, the work must comply with the current NCC. Common triggers include:

• Replacing the balustrade or handrails
• Changing the staircase configuration (adding or removing treads)
• Structural modifications to the staircase or supporting structure
• Change of building classification (e.g., residential to commercial)

Craftsman Stairs (QBCC Licence #69007) ensures full regulatory compliance on every project. Contact us for expert guidance on your staircase project across Brisbane, Moreton Bay and the Sunshine Coast.

Frequently Asked Questions