SDA vs SIL: What’s the Difference Under the NDIS – and Can You Have Both?
SDA and SIL are often mentioned in the same conversation, which makes it easy to assume they are two names for the same type of disability accommodation. They are not. The simplest difference is this: Specialist Disability Accommodation (SDA) is about the home itself, while Supported Independent Living (SIL) is about the support workers who help a person live in their home.
The NDIS assesses and funds them for different reasons. A participant may have SIL without SDA, or may live in SDA while using SIL or another support arrangement. Some people have both.
SARI Healthcare currently lists both services and its referral form lists SDA and SIL separately. This guide uses current NDIS guidance to explain the difference before participants and families discuss housing, support or a referral in Adelaide.
SDA vs SIL: The Quick Answer
| Question | SDA | SIL |
|---|---|---|
| What is it? | Specialist housing designed for people with extreme functional impairment or very high support needs. | Funding for support workers to help or supervise a participant 24 hours a day, 7 days a week. |
| What does it pay for? | The specialist dwelling and its disability-related design features. | Disability-related support workers and supervision in the home. |
| Does it pay rent or groceries? | No. Participants still pay a reasonable rent contribution and ordinary living costs such as bills. | No. SIL does not pay rent, groceries or ordinary day-to-day expenses. |
| Can you have both? | Yes. SDA and SIL can appear together when both the specialist home and the support arrangement are funded. | Yes. SIL can also be delivered in a home that is not SDA. |
A useful memory aid is: SDA is the building; SIL is the support. The two may work together, but one does not automatically create entitlement to the other.
What Is Specialist Disability Accommodation (SDA)?
Specialist Disability Accommodation is a range of housing designed for people with extreme functional impairment or very high disability-related support needs. Current NDIS guidance says SDA may be suitable when other home and living supports do not meet a person’s disability needs.
SDA funding relates to a dwelling designed or built with specialist features. Depending on the approved category and the person’s needs, these may include wider doorways, accessible kitchens, ceiling hoists, home automation or durable construction.
The four SDA design categories
The NDIS recognises four SDA design categories: Improved Liveability, Fully Accessible, Robust and High Physical Support. They describe different design needs, not quality rankings. The participant’s plan and needs determine the relevant category, building type and location.
SDA homes must be enrolled and provided through a registered SDA provider. A vacancy does not create SDA funding, and SDA funding does not mean every vacancy will match the participant’s approved needs.
What Is Supported Independent Living (SIL)?
Supported Independent Living is a support arrangement, not a type of house. Current NDIS guidance describes SIL as funding for a support worker to help or supervise a participant 24 hours a day, 7 days a week. Support may be shared or individual depending on the funded arrangement.
SIL can include help with personal care, meals, household tasks and daily living skills. It is for people with high support needs. Current guidance says it is not SIL when someone only needs a few hours of support a day or week, or self-directs their own workers.
SIL does not pay for the house. It does not cover rent, groceries, electricity or other ordinary living expenses. Those costs remain separate from the disability-related support funded through SIL.
A 2026 change participants should know about
From 1 July 2026, SIL provider registration requirements changed. The NDIS Commission introduced mandatory registration and new SIL Practice Standards, with transition arrangements for existing providers. Current registration status is therefore an important provider check.
Can You Have SDA and SIL at the Same Time?
Yes. Current NDIS guidance notes that many participants living in SDA also have in-home supports such as SIL. SDA pays for the specialist dwelling; SIL pays for disability-related support workers in the home.
But SDA plus SIL is not an automatic package. The NDIS considers housing and support needs separately. Someone may need SIL in an ordinary home, while another participant may need SDA but use a different in-home support model.
That is why the better question is not “Which one should I choose?” It is “What does my home need to do, and what support do I need inside it?”
Six Differences That Matter in Real Life
- They fund different things
SDA funds specialist housing. SIL funds support workers. Mixing those two ideas can create confusion about quotes, service agreements and what the NDIS will actually pay. - They are designed for different needs
SDA is for participants with extreme functional impairment or very high support needs who require specialist housing. SIL is for people needing high ongoing help or supervision across the full day and night. The evidence for housing and support is considered separately. - SIL does not require an SDA house
A participant can receive SIL in a non-SDA home. SIL is commonly associated with shared living, although individual support may be funded in limited circumstances depending on need. - SDA does not include personal care
SDA does not include personal care, SIL, Individualised Living Options or assistive technology. Those are separate supports. An accessible home may help care be delivered safely, but the building does not provide the worker. - Provider and property checks are different
SDA providers must be registered and the dwelling must be enrolled as SDA. SIL providers are also subject to registration requirements from July 2026. Check the housing and support-provider details separately. - Ordinary living costs remain your responsibility
Neither SDA nor SIL is a general living-cost budget. SDA residents pay a reasonable rent contribution and day-to-day costs such as electricity; SIL does not cover rent or groceries. Ask each provider to explain participant and NDIS costs clearly.
Three Scenarios That Make the Difference Clearer
These examples are illustrations, not eligibility tests. NDIS decisions depend on individual evidence, goals and disability-related needs.
A participant needs specialist physical-access features and also requires support or supervision throughout the day and overnight. Both SDA and SIL may be relevant because there is both a housing-design need and a high support need.
Another participant needs 24/7 support but can live safely in a standard rental. SIL may be relevant without SDA because the main issue is support, not building design.
A third participant needs SDA because ordinary housing cannot meet their disability-related needs, but daily support is funded another way. SDA can be considered separately from SIL.
What to Check Before Choosing an SDA Home or SIL Provider
Start with the participant’s needs, preferences and plan – not the first vacancy available. Before committing to a property or support arrangement, ask:
- Does the current NDIS plan include SDA, SIL, both, or another home and living support?
- If SDA is funded, what design category, building type and location are recorded or relevant to the plan?
- Is the SDA dwelling properly enrolled, and what accessibility features are actually present in that specific property?
- What reasonable rent contribution, utilities and other day-to-day costs will the participant pay?
- What support hours, supervision and shared or individual staffing are included in the SIL arrangement?
- Is the SIL provider currently registered to deliver SIL under the 2026 requirements?
- Are the SDA and SIL arrangements covered by clear written service agreements, and who should be contacted if something changes?
- What are the housemate, privacy, visitor, communication and incident-management arrangements for the home?
A my NDIS contact can discuss home and living options and evidence. A provider can explain services and vacancies; it cannot approve NDIS funding.
Where SARI Healthcare Fits
SARI Healthcare currently lists Specialist Disability Accommodation and Supported Independent Living, and its referral form includes both separately. The NDIS Commission register lists Sari Health Care Pty Ltd as approved, with both registration groups.
Registration confirms approved scope; it does not guarantee a suitable vacancy, roster, service capacity or NDIS funding. Confirm current funding, the exact property/support requested and SARI’s availability before making plans.
Frequently Asked Questions
Is SDA the same as SIL?
No. SDA is specialist housing. SIL is funding for support workers who help or supervise a participant in their home. They may be used together, but they are separate NDIS supports.
Do I need SDA to receive SIL?
No. SIL can be delivered in a home that is not SDA when the participant’s living arrangement and support needs make SIL appropriate and it is funded in their plan.
Can I live in SDA without SIL?
Potentially. SDA and in-home supports are considered separately, so a participant may use SIL or another suitable support arrangement depending on their plan and needs.
Does SDA pay my rent and bills?
No. SDA funding pays the SDA provider for the specialist dwelling, while the participant pays a reasonable rent contribution and ordinary day-to-day living costs such as electricity. The service agreement should explain the amounts and responsibilities clearly.
Does SIL pay for groceries or rent?
No. SIL funds disability-related support workers and supervision. Rent, groceries, utilities and other ordinary living expenses are separate.
Does SARI Healthcare offer SDA and SIL in Adelaide?
SARI Healthcare’s current website and referral form list both services, and the NDIS Commission provider register includes both registration groups for Sari Health Care Pty Ltd. Contact SARI Healthcare directly to confirm current vacancies, service capacity and whether a specific enquiry is within its present scope.
The Best Question Is: What Do You Need From the Home, and What Do You Need From the Support?
SDA vs SIL is not always a choice between competing options. SDA asks whether the participant needs a specialist dwelling. SIL asks whether the participant needs a high level of help or supervision from support workers across the day and night.
Once those questions are separated, the NDIS home and living system becomes easier to navigate. Some people need one, some need both, and others are better served by different home and living supports.
If you are exploring SDA or SIL in Adelaide, start with the current NDIS plan, recent evidence and day-to-day needs, then discuss housing and support separately. SARI Healthcare can explain its current services and enquiry process.
General information only: this article does not provide legal, financial or medical advice and does not guarantee NDIS funding, SDA eligibility, SIL funding, property availability or service capacity. Check current NDIS guidance and the participant’s plan before changing a home or support arrangement.