Livable Housing Design Guidelines and Silver Level Requirements

What This Requirement Covers

The Livable Housing Design Guidelines (LHDG) Silver level sets minimum design features that make new dwellings and sole-occupancy units easier to enter, navigate and adapt as occupants age or acquire mobility needs. The Silver level is part of the Australian Building Codes Board (ABCB) Standard for Livable Housing Design and has been referenced within the National Construction Code (NCC) Deemed-to-Satisfy provisions for both Class 1 (detached dwellings) and Class 2 (sole-occupancy units in apartment buildings) situations. The objective is to provide basic, practical accessibility without prescribing full universal access - enabling independent use of entry, sanitary facilities and internal circulation for people with limited mobility.

This requirement applies to new residential dwellings and relevant sole-occupancy units where the NCC or a state/territory schedule mandates compliance with the ABCB Standard for Livable Housing Design. For Class 1 dwellings the requirements are located in NCC Volume Two, Part H8 (Livable housing design). For Class 2 sole-occupancy units the relevant provisions are in NCC Volume One, Part G7. Where the NCC adopts the ABCB Standard as a Deemed-to-Satisfy Solution, complying with the Silver level provisions of that Standard will satisfy the Performance Requirement (see G7D2 and H8D2). State and territory schedules may modify timing or application.

Key Requirements

1. Step-free continuous path to entry: A continuous, step-free access path must be provided from either the allotment pedestrian entry, an appurtenant Class 10a garage or carport, or a private car parking space to at least one dwelling/sole-occupancy unit entrance, unless an exemption applies (see H8P1
2. (a) and G7P1 applications). See NCC Volume Two, H8P1 and NCC Volume One, G7P1.
3. Level and step-free entrance door: At least one door into the dwelling or sole-occupancy unit must be level and step-free from the access path (NCC Volume Two, H8P1(b); NCC Volume One, G7P1(a)).
4. Internal doors and corridors facilitating unimpeded movement: Internal doors and corridors on the entry/ground level must facilitate unimpeded movement between spaces (NCC Volume Two, H8P1(c); NCC Volume One, G7P1(b)). Typical measured clearances used in the Silver level of the ABCB Standard include:
5. Clear opening widths: Internal doors with a clear opening of at least 820 mm to 850 mm where shown in ABCB Silver guidance (consult the ABCB Standard for the exact door types and locations required at Silver level).
6. Corridor widths: Internal circulation spaces designed to permit ambulant wheelchair movement - commonly a minimum clear corridor width of 1000 mm to 1200 mm is used in Silver guidance so unimpeded movement is achieved (refer to the ABCB Standard for precise clause measures).
7. Sanitary compartment on entry level that facilitates independent use: A toilet compartment on the entry/ground level that facilitates independent access and use is required (NCC Volume Two, H8P1(d); NCC Volume One, G7P1(c)). Silver provisions typically require:
8. Sanitary compartment clearances: A shower or sanitary compartment sized to allow a forward or side approach and transfer. Silver level commonly requires a shower with a minimum clear internal dimension (e.g., 1000 mm x 1000 mm) and a toilet clearance to allow a 750-800 mm transfer space adjacent - consult the ABCB Standard for the exact Silver table values.
9. Shower facilitating independent use: A shower that facilitates independent access and use is required on the entry level (NCC Volume Two, H8P1(e); NCC Volume One, G7P1(d)). The ABCB Silver level specifies no raised hob or a flush threshold and a minimum internal shower clearance (commonly 1000 mm x 1000 mm as the Silver design benchmark).
10. Walls constructed to facilitate future grabrail installation: Walls of the sanitary compartment, the shower, and any built-in bath (other than freestanding baths) must be constructed to facilitate future installation of grabrails with minimal removal of wall linings (NCC Volume Two, H8P1(f); NCC Volume One, G7P1(e)).
11. Referenced NCC clauses: Key NCC references include NCC Volume Two, Part H8 (H8P1, H8D2, H8O1) for Class 1; NCC Volume One, Part G7 (G7P1, G7D2, G7O1) for Class 2 sole-occupancy units. When using a Deemed-to-Satisfy approach, G7D2 and H8D2 require compliance with the ABCB Standard for Livable Housing Design (except where Part 1 can be omitted for Class 2 as noted in G7D2 explanatory information).
12. Australian Standards and other references: While the ABCB Standard is the primary source for Silver level dimensions, related work should comply with applicable Australian Standards where referenced for construction details, for example in accordance with AS 1428.1 (design for access and mobility) where dimensions overlap, and general construction standards such as AS 1684 (timber-framed construction), AS 3700 (masonry), and AS 4100 (steel structures) for structural elements affected by accessibility features. Always follow specific clause citations in the ABCB Standard and NCC when cross-referencing standards.

Note: The ABCB Standard for Livable Housing Design contains the detailed tables and exact numeric values for Silver level door clearances, circulation widths, parking stall dimensions for adaptable parking, shower and toilet clearances, ramp gradients and maximum lengths where provided. The NCC Deemed-to-Satisfy provisions require compliance with that Standard (see G7D2 and H8D2).

Residential vs Commercial

1. Residential (Class 1 and Class 2 sole-occupancy units): The NCC expressly incorporates the ABCB Standard for Livable Housing Design as the Deemed-to-Satisfy Solution for Class 1 (NCC Volume Two, H8D2/H8P1) and Class 2 sole-occupancy units (NCC Volume One, G7D2/G7P1). The Silver level provisions typically apply to individual dwellings and apartment units and focus on entry-level access, internal circulation, an entry-level sanitary compartment and shower, and provision for future grabrails.
2. Commercial and other classes (Class 3 - 9): The Silver level LHDG is intended for housing and sole-occupancy residential units and is not a direct compliance tool for Class 3-9 commercial buildings. Commercial buildings are governed by separate NCC accessibility provisions (for example, access for people with disabilities and building egress requirements). Where mixed-use developments include residential units, apply the LHDG Silver requirements to the residential parts as required by the NCC adoption in the relevant part.

Exceptions and Exemptions

1. Site constraints: For Class 1 dwellings, the NCC allows exemption from the step-free access path requirement (H8P1(a)/H8D2(2)) where the average slope of the ground exceeds 1:14, or where required ramping would exceed the maximum length and gradient allowed by Clause 1.1(4) of the ABCB Standard, or where no suitable location exists due to site conditions.
2. Class 2 application limits: G7P1
3. (a) only applies to sole-occupancy units located on an accessible floor; explanatory notes exempt Part 1 (step-free path from parking or boundary) for Class 2 in some circumstances because other NCC provisions (Part D4) already address access from car parking or boundary in apartment settings.
4. Alternative Performance Solutions: A Performance Solution may be adopted instead of the Deemed-to-Satisfy ABCB Standard where evidence demonstrates an equivalent or better outcome in accordance with NCC performance pathway procedures (see A2G2 and A2G4). This allows alternative design solutions tailored to constrained sites or unique developments, provided equivalence is demonstrated and documented.

State and Territory Variations

1. Timing delays: Part G7 (Volume One) and Part H8 (Volume Two) of the NCC included commencement notes indicating staged effective dates in some jurisdictions. For example, rollout dates have varied and some jurisdictions provided later commencement dates - check the relevant state schedule in NCC Volume One for updated application dates.
2. State schedules: The NCC requires checking state and territory schedules (Schedules 4-12 in NCC Volume One) for jurisdictional modifications. Queensland, New South Wales, Victoria, Tasmania and others have schedules that can alter or clarify application. For instance, the NCC explanatory information notes that Part 1 of the ABCB Standard (step-free path from parking or boundary) may be addressed differently for Class 2 buildings because Part D4 already covers access from car parking or boundary in apartments. Always verify against the relevant state schedule in NCC Volume One and the state building authority guidance.

Practical Compliance Tips

1. Review the ABCB Standard first: When designing to the Silver level, use the ABCB Standard for Livable Housing Design as the primary source for exact numeric tables for door clearances, shower and toilet dimensions, parking stall sizes and ramp gradients; cite NCC Volume One or Two clause references (G7D2, H8D2) when submitting plans.
2. Dimension with clearances, not nominal widths: Show clear door openings (clear width after hardware) and corridor clearances in millimetres on drawings - state the clear opening (e.g., 820 mm clear) rather than the nominal door leaf width.
3. Design showers and toilets to permit future adaptation: Provide at least a 1000 mm x 1000 mm internal shower space (per Silver guidance) and build sanitary walls to accept grabrails - indicate backing in wall framing on schedules so future modification avoids removing linings.
4. Consider thresholds early: Specify flush thresholds or low-profile shower thresholds on entry-level showers and at the principal entry to avoid retrofitting ramps later; note step-free entrance on the door schedule and site plan.
5. Coordinate parking and access: If providing adaptable parking or step-free approaches from a garage or parking space, dimension the access path and parking stall to the ABCB Silver tables and show gradients (max 1:14 average slope constraint where exemptions are considered).
6. Document exemptions and performance solutions: If site constraints trigger an exemption (for example slope > 1:14) or you propose a Performance Solution, document the rationale and alternate measures with cross-reference to NCC clauses A2G2/A2G4 and the relevant state schedule.
7. Cross-check with state schedules and local council: Before finalising design, confirm any state or territory variations in the NCC schedules and obtain early advice from the local certifier or council to avoid later noncompliance issues.

Citations: NCC 2022 Volume Two - Part H8 (H8P1, H8D2, H8O1); NCC 2022 Volume One - Part G7 (G7P1, G7D2, G7O1). For detailed Silver level tables and exact dimensions consult the ABCB Standard for Livable Housing Design (Silver level tables) and relevant Australian Standards such as AS 1428.1 where dimensions overlap.