Robust SDA: what the design category requires for new builds in NSW
Robust is housing designed to incorporate a reasonable level of physical access provision and be very resilient, reducing the likelihood of reactive maintenance and reducing the risk to the participant and the community. That is the NDIA wording in the SDA Design Standard (Edition 1.1, October 2019). If you are building new, the Design Standard is the test, not a blog checklist of fixtures. Robust is not Fully Accessible or High Physical Support. Physical access sits closer to Improved Liveability.
Robust SDA in one paragraph
Robust is one of four NDIS Specialist Disability Accommodation design categories, alongside Improved Liveability, Fully Accessible and High Physical Support. It is for participants who need resilience and durability features associated with complex behavioural support needs. New Build and New Build (refurbished) dwellings enrolled from 1 July 2021 must be certified by an accredited SDA assessor against the SDA Design Standard at design stage and again as built. Exact clause applicability is shown by the icons in the Design Standard PDF. Category definitions and the wider comparison sit on SDA vs livable vs adaptable.
Two rule sets, and which one applies to your dwelling
Most short guides still quote informal durability lists. Those lists go stale. For a new build enrolling today, the Design Standard is the minimum.
New Build and New Build (refurbished) enrolled from 1 July 2021
The SDA Design Standard (October 2019, Edition 1.1) is the minimum design requirement. An accredited SDA assessor certifies the nominated category at provisional design stage, when the design is lodged for approval, and again at final as-built stage. Final as-built certification is mandatory for enrolment. Certification is not enrolment. The registered SDA provider enrols the built dwelling. The process is set out on SDA design and as-built certification.
Existing and Legacy Stock, and new builds first enrolled before 1 July 2021
The NDIS Pricing Arrangements for SDA 2026-27 apply the category descriptions in the Table regime to this older stock. New SDA enrolment uses the Design Standard, not the older table wording.
| Dwelling | Minimum design test |
|---|---|
| New Build, or New Build (refurbished), enrolled from 1 July 2021 | SDA Design Standard, Edition 1.1 (October 2019), certified by an accredited SDA assessor at design and as-built stages |
| Existing or Legacy Stock, and new builds first enrolled before 1 July 2021 | Pricing Arrangements 2026-27 category descriptions |
What Robust requires under the Design Standard
The clauses that apply to Robust are those whose applicability icon in Edition 1.1 is Robust. Icons were read from the published Standard. A clause that applies only to Fully Accessible or High Physical Support is not a Robust requirement. Dimensions are minimums unless the Standard states a range. Designers should not rely on informal lists.
Robust requires a reasonable level of physical access, closer to Improved Liveability than to Fully Accessible. Participants in Robust dwellings may not require a wheelchair. The car-space concession for step-free access from the boundary applies, the same as for Improved Liveability. Door and corridor clearances follow the Robust figures in the Standard.
The distinctive Robust requirements sit in clause 25. Resilient but inconspicuous materials that can withstand heavy use, including high impact wall lining. High impact or vandal-proof fittings and fixtures, such as commercial door handles, that remain resilient yet do not undermine the character of the home. The participant bedroom shall be sound insulated. Recessed lighting fixtures. At final as-built stage, design drawings showing layout with areas of egress and retreat for staff and other residents.
A single dwelling may be certified under more than one design category. All shared areas must comply with the minimum requirements of every enrolled category.
Robust vs Improved Liveability vs Fully Accessible vs High Physical Support
| Category | Who it is for | Physical access level | Headline design driver |
|---|---|---|---|
| Robust | Participants who need a very resilient dwelling for complex behavioural support needs | Reasonable, closer to Improved Liveability. Car-space concession and smaller door clearances | Impact resistance, fittings that survive heavy use, sound insulation and retreat layouts |
| Improved Liveability | Sensory, intellectual or cognitive impairment; wheelchair use not assumed | Reasonable. Bedroom may be on a stepped level | Contrast, wayfinding and a usable entry-level living core |
| Fully Accessible | Significant physical impairment; wheelchair use expected | High. Larger door and corridor clearances, AS 1428.1 sanitary layout | Wheelchair circulation and transfer |
| High Physical Support | Significant physical impairment requiring very high levels of support | High, same baseline as Fully Accessible, plus hoist and life-support provisions | Ceiling hoist readiness and emergency power |
Improved Liveability is covered in full on Improved Liveability SDA. Fully Accessible is covered on Fully Accessible SDA. High Physical Support is covered on the High Physical Support page when published. The wider housing comparison sits on SDA vs livable vs adaptable. Person-centred design for Robust sits on person-centred design for Robust SDA.
How Robust certification works (design stage to as-built)
The Design Standard allows certification at two stages. Provisional design certification is when the design has been submitted for building approval. Final as-built certification is when the dwelling is built, and it is mandatory for enrolment. An accredited SDA assessor certifies compliance with every clause that applies to the nominated category. The assessor must be independent of the provider, developer and owner.
Sydney Access Consultants can advise the design, or be the independent certifying assessor, on a given development. Not both on the same project. Design documentation, when the practice is not the certifying assessor, sits on SDA architectural documentation. The certification path sits on SDA certification.
Designing Robust SDA in Sydney and NSW: practical notes
NCC still applies. Where the NCC and the Design Standard conflict, the NCC takes precedence, except for spatial requirements of the Design Standard. NSW assesses building work against NCC 2022 Amendment 2 until NCC 2025 adoption on 1 May 2027. See NCC 2025 in NSW.
SDA is not Livable Housing. NSW leaves the Livable Housing Design Standard blank for Class 1a and Class 2 sole-occupancy units, so it is not a mandatory Deemed-to-Satisfy path. SDA Design Standard enrolment is a separate regime. Sydney Access Consultants does not hold Livable Housing assessor registration. See Livable Housing only for that distinction.
For Class 2 or Class 3 projects, common-area access under NCC Part D4 is separate from the dwelling Robust features. See SDA apartment compliance example.
The Design Standard review and Edition 2.0 work is underway. Do not assume outcomes. See SDA Design Standard review.
FAQ
What is Robust SDA?
Robust is one of four NDIS Specialist Disability Accommodation design categories. It is housing designed to incorporate a reasonable level of physical access provision and be very resilient, reducing the likelihood of reactive maintenance and reducing the risk to the participant and the community, certified against the SDA Design Standard for New Build dwellings enrolled from 1 July 2021. An accredited SDA assessor certifies the dwelling at design stage and again as built.
How does Robust physical access relate to Improved Liveability?
Robust physical access generally aligns closer to Improved Liveability than to Fully Accessible or High Physical Support. The car-space concession and door clearances follow the same pattern. Confirm exact applicability from the Design Standard icons.
Does a Robust new build follow informal durability lists?
No. For New Build and New Build (refurbished) enrolled from 1 July 2021, the SDA Design Standard (October 2019, Edition 1.1) is the test. Informal lists go stale. Clause 25 sets the resilience requirements.
Can one dwelling be Robust and another category?
Yes. The Design Standard allows a single dwelling to be certified under multiple design categories. All shared areas must comply with the minimum requirements of every enrolled category.
Talk to an accredited SDA assessor
Gary Finn of Sydney Access Consultants is listed on the NDIS find-an-assessor register as SDA00039, and is an Accredited Member of the Access Consultants Association, member 435. Ask about a design-stage review or independent certification on (02) 9586 3111. The practice can advise the design or certify it. Not both on the same development. See locations for Cronulla, Sutherland Shire, Hurstville and other areas.