Who is an SDA assessor?
An SDA property must be checked before it can be enrolled as Specialist Disability Accommodation. An SDA assessor is an independent professional who checks whether the dwelling meets the required design standard and category.
An SDA assessment compares building plans and the finished property with the SDA Design Standard. The assessor focuses on the dwelling, not whether a person qualifies for SDA funding.
Assessors need relevant building or access qualifications and accreditation under an approved third party certification scheme. They may work with architects, builders, developers and SDA providers throughout the project.
The assessment category must match the category selected for the property. You can read more about the different requirements in our SDA design categories overview.
What does an SDA assessor check?
The exact checks depend on the dwelling type and selected SDA category. An apartment designed for Improved Liveability has different requirements from a house designed for High Physical Support.
An assessor may examine:
- Step free access from the property boundary and parking area
- Door widths, corridors and circulation spaces
- Bedroom, bathroom and kitchen layouts
- Flooring, windows, switches and door hardware
- Structural provisions for ceiling hoists where required
- Emergency power and communication features for relevant categories
- Space for assistive technology and home automation
- Shared areas in apartment developments
The assessor records anything that does not meet the standard. The project team must then change the plans or building work before certification can be issued.
Certification confirms design compliance. It does not guarantee that the property will suit every person within that category, so your individual needs still matter when choosing NDIS housing.
When does the assessment happen?
Assessment usually happens at two formal stages. Early checking reduces the risk of expensive changes after construction, particularly when access measurements or structural provisions are involved.
| Stage | What is checked | Typical outcome |
|---|---|---|
| Design stage | Plans, specifications and schedules | Provisional design certification |
| Construction | Approved changes and selected products | Issues identified before completion |
| Final stage | Finished dwelling and installed features | Final as built certification |
| SDA enrolment | Certification documents | Provider applies to enrol the dwelling |
The provider or developer normally engages the assessor. Participants do not usually arrange property certification themselves.
In Western Australia, SDA certification sits alongside normal planning, building and occupancy requirements. It does not replace approvals from a building surveyor, local government or other responsible authority. Our article on how SDA properties are built in WA explains how these requirements fit together.
What is outside the SDA assessor role?
An SDA assessor does not decide whether you are eligible for SDA funding. The NDIA makes that decision using evidence about your disability, housing needs, support needs and long term goals.
An occupational therapist may assess how you move around, complete daily activities and use equipment. Their report can help show why a particular SDA category, building type or location is suitable. Learn more about what to expect from an NDIS OT assessment.
The roles can be separated like this:
- The SDA assessor checks the building against the design standard.
- Your OT assesses your functional housing needs.
- The NDIA decides your SDA eligibility and funding.
- The SDA provider manages the dwelling and tenancy arrangements.
If you are preparing your first housing request, see our guide to SDA initial applications in Perth.
How can you use the assessment when choosing a home?
Ask the SDA provider whether the property has final certification and is enrolled with the NDIA. For a new development, ask which assessment stage has been completed and whether any building changes are still pending.
You should also confirm:
- The certified SDA category and dwelling type
- Whether your approved funding matches the property
- Which accessibility and technology features are installed
- Whether your mobility equipment fits through doors and circulation areas
- How emergency systems work during a power or internet outage
Certification is a starting point, not a replacement for inspecting the home. A compliant property may still be unsuitable because of bedroom layout, transport access, housemates or distance from your support network.
Use our SDA property inspection questions when visiting homes around Perth.
What should you do next?
An SDA assessor checks the dwelling, while your OT and the NDIA consider your personal housing needs and funding. Understanding these separate roles helps you ask the right questions and avoid relying on property certification alone.
If you need help reviewing an SDA option, arranging an OT assessment or understanding the certification status of a Perth property, contact the Innogreen team.