Skip to main content
Wyndham EliteSupport Services

Blog

SDA design categories explained: the 4 types of specialist disability accommodation

The 4 SDA design categories explained in plain English: Improved Liveability, Fully Accessible, Robust and High Physical Support, plus building types, eligibility and rent.

By S. M. Sam · Published 2 October 2026 · 5 min read

Fact-checked against official NDIS sources. Our editorial policy

Key points

  • Specialist disability accommodation (SDA) is housing for people with extreme functional impairment or very high support needs.
  • There are 4 SDA design categories: Improved Liveability, Fully Accessible, Robust and High Physical Support.
  • SDA also comes in 4 building types: apartments, villas, duplexes or townhouses, houses, and group homes for 4 or 5 residents.
  • SDA funding pays for the home, not the support. Support such as SIL is funded separately.
  • You pay a reasonable rent contribution: 25% of the Disability Support Pension and Pension Supplement, plus any Commonwealth Rent Assistance you get.

What SDA is, and who it's for

Specialist disability accommodation (SDA) is housing built or modified for people with disability who have extreme functional impairment or very high support needs. SDA design categories describe the physical features a home has, so the NDIA can match you with housing that suits your needs.

To be eligible for SDA, the NDIA must be satisfied that you have extreme functional impairment, meaning a lot of difficulty doing daily tasks on your own, or very high support needs, meaning you need a lot of person-to-person support for a significant part of the day. SDA must also be the right fit: combined with your other supports, it needs to lead to better outcomes than other home and living options.

The 4 SDA design categories

Your plan will name the SDA design category the NDIA has decided meets your needs. Here's what each one means and who it's designed for.

Infographic

SDA design categories at a glance

  • Sensory, intellectual or cognitive needsImproved Liveability

    Housing with better physical access and features that make it easier to live in for people with sensory, intellectual or cognitive impairment.

    • Highly visible walls and floors (good contrast)
    • Clear layouts that are easy to find your way around
    • Some improved physical access

  • Significant physical impairmentFully Accessible

    Housing with a high level of physical access for people with significant physical impairment, for example if you use a wheelchair at home.

    • Step-free access throughout
    • Wider doorways and circulation space
    • Accessible kitchen and bathroom

  • Complex behaviour support needsRobust

    Housing that's very strong and durable, built to be safe for you and the people around you, and to reduce the need for repairs and maintenance.

    • Strong, hard-wearing materials and fittings
    • Safety-focused design
    • Space for a retreat area and support staff

  • Very high physical support needsHigh Physical Support

    Housing with a high level of physical access for people who need very high levels of support.

    • Ceiling hoists
    • Backup power supply
    • Home automation and communication technology
Definitions from ndis.gov.au. Example features are typical, and every home is different.

Some older homes built before the SDA Design Standard are classed as Basic. These don't meet the newer design requirements but are still enrolled as SDA.

SDA building types

As well as a design category, every SDA home has a building type. The NDIA considers how many people you'd like to live with, the type of building you'd like, and whether it meets the funding criteria.

Infographic

SDA building types

Apartment

What it is
A self-contained unit that's part of a larger residential building
Good to know
Often close to transport and shops. May be next to an onsite support base.

Villa, duplex or townhouse

What it is
A separate but semi-attached home
Good to know
More privacy than a shared house, with neighbours close by

House

What it is
A detached, low-rise home with a garden or courtyard
Good to know
Usually shared by 2 or 3 people

Group home

What it is
A house for 4 or 5 residents
Good to know
Shared living with more housemates

How the NDIA decides your design category

The NDIA looks at your individual needs when it decides which of the 4 SDA design categories suits you. It uses allied health reports, such as an occupational therapist's functional assessment, and reports about your daily support and housing needs. It also considers where you want to live and whether that location helps you pursue your goals.

Your plan then states the design category, building type and location your SDA funding is for. The SDA budget is the maximum the NDIA will pay, and the SDA provider claims it when they provide the home to you.

Infographic

From SDA eligibility to moving in

  1. 1

    Talk about your home and living goals

    Raise SDA with your my NDIS contact or support coordinator.

  2. 2

    Gather evidence

    An occupational therapist explains your daily support and housing needs, and why other options don't meet them.

  3. 3

    NDIA decision

    If eligible, your plan states your SDA design category, building type and location.

  4. 4

    Find a home

    Search SDA vacancies that match your funding, with help from your support coordinator.

  5. 5

    Visit and agree

    Meet housemates, check the home, and sign a tenancy agreement and a separate support agreement.

What you pay to live in SDA

SDA funding doesn't mean the home is free. You pay a reasonable rent contribution and your day-to-day living costs, such as electricity, food and internet.

The maximum reasonable rent contribution is 25% of the Disability Support Pension, plus 25% of the Pension Supplement, plus any Commonwealth Rent Assistance you get. The amount changes when pensions are indexed, so ask the SDA provider for the current figure.

Choosing between SDA homes

Two homes in the same design category can feel very different. When you visit, think about:

  • Location: is it close to family, work, health services and the places you like to go?
  • Housemates: do your routines, interests and support needs fit together?
  • Support: who provides SIL or other support in the home, and are they registered?
  • Features: does the home have the specific features you need, not just the right category?
  • Agreements: are the tenancy and support agreements separate, clear and fair?

Next steps

We help people in Point Cook, Wyndham and across Melbourne's west find SDA that matches their funding, and we provide the supported independent living inside the home. We support people Australia-wide too.

Common questions

What are the 4 SDA design categories?

Improved Liveability, Fully Accessible, Robust and High Physical Support. Older homes that don't meet the SDA Design Standard may be classed as Basic.

Can I live in a different SDA category from the one in my plan?

Your SDA funding is for the design category, building type and location stated in your plan. Talk to your my NDIS contact before choosing a home that doesn't match.

Does SDA include support workers?

No. SDA is the home. Support in the home, such as supported independent living, is funded separately and can come from a different provider.

How much rent do I pay in SDA?

Up to 25% of the Disability Support Pension and 25% of the Pension Supplement, plus any Commonwealth Rent Assistance you receive. You also pay your own living costs.

Sources

We checked this article against these official sources. Dates show when each page was last updated. Links open in a new tab.

  1. What is specialist disability accommodation (SDA) · NDIS (ndis.gov.au) · 1 July 2026
  2. Our Guideline: Specialist disability accommodation · NDIS (ndis.gov.au) · 30 September 2025
  3. What are individualised living options (ILO) · NDIS (ndis.gov.au) · 17 July 2026
  4. What is supported independent living (SIL) · NDIS (ndis.gov.au) · 17 August 2026

This is general information, not advice about your situation. NDIS rules are changing in stages until 2028, so check ndis.gov.au or talk to our team before making decisions.