NDIS Guides

SIL vs SDA: What Is the Difference?

August 4, 2026

If you are comparing SIL vs SDA, here is the short answer. SDA is the specialist home you live in. SIL is the funding for the support workers who help you inside that home. They are not two options to choose between. They do different jobs, and many people have both in their NDIS plan. This guide explains each one in plain English, and shows how they work together.

Quick summary

SDA is the home. Specialist housing built for high support needs.
SIL is the support. Funding for support workers, up to 24 hours a day.
SDA does not cover the support you receive inside the home.
SIL is not housing, and it does not pay your rent.
The NDIS confirms that some people have both SDA and SIL in their plans.
In an SDA home, you still pay your own rent and everyday bills.

SIL vs SDA at a glance

The easiest way to hold the difference in your head is to ask one question. Are we talking about the building, or the people? Here is how the two compare.

	SDA	SIL
What it is	The specialist home itself	Funding for support workers
What it pays for	The dwelling and its features	The people who help you
Who it is paid to	The SDA housing provider	The support provider
Covers your rent?	No, you pay a rent contribution	No, it is not housing
Designed for	Extreme functional impairment or very high support needs	People needing a high level of support at home all the time

What is SDA?

Specialist Disability Accommodation is a range of housing for people with extreme functional impairment or very high support needs. The homes are built with features that meet disability needs, such as wide doorways, wheelchair-accessible kitchen sinks, ceiling hoists, or button-operated doors. An SDA property can be a house, apartment, villa, duplex or townhouse.

The NDIS is clear about what SDA does not include. It does not cover personal care, supported independent living, individualised living options, or assistive technology. In other words, SDA pays for the building, not the help you receive in it.

The four SDA design categories

SDA is categorised by how a home is built to suit different needs. There are four official design categories:

Improved liveability: better physical access and more features for people with sensory, intellectual or cognitive impairments.
Fully accessible: a high level of physical access for people with significant physical challenges.
Robust: strong, durable housing built to be safe, which may suit people who need help managing complex behaviours.
High physical support: a high level of access for very high support needs, such as ceiling hoists or backup power.

What is SIL?

Supported Independent Living is funding for a support worker to help you for 24 hours a day, 7 days a week. You might share a support worker with others in your home, or you might have your own. It depends on how much help you need. Support workers assist or supervise the day-to-day tasks in your home, such as personal care, showering, getting dressed, cooking meals, and household jobs like cleaning.

Importantly, SIL is not housing. As the NDIS puts it, SIL is funding for support workers to help you. It does not pay for the house.

How much support does SIL involve?

The NDIS gives a helpful guide. SIL may suit you if you need active disability support for more than 8 hours per day, plus some level of support or supervision across the other hours. In short, you need help across the full 24 hours.

SIL might not be the right fit if you only need a few hours of support a day or week. It is also not SIL if you choose and manage your own support workers. In those situations, the NDIS may look at other supports instead.

How SIL and SDA work together

Because they do different jobs, the two often sit side by side in a plan. The NDIS states that some people have both SDA and SIL. When that happens, the money flows in three separate directions, and this is the part most people find confusing at first.

SDA funding pays the SDA provider for the home.
SIL funding pays for your carers and support workers.
You pay the rent and your everyday bills.

Your rent contribution is an agreed amount paid to your SDA provider, and it should be written into your service agreement. The amount a provider can charge must not exceed the maximum reasonable rent contribution, which the NDIS sets out in the SDA pricing arrangements.

Living arrangements with SIL and SDA

SDA often means sharing a home with a small number of other people, where you have your own private bedroom. Sometimes participants can live on their own if that suits their needs best. Similarly, you can receive SIL whether you live with other NDIS participants or on your own. It depends on your support needs.

One more thing worth knowing. Homes must be enrolled by a provider registered with the NDIS Quality and Safeguards Commission, and once approved, the NDIS calls these homes SDA dwellings. From 1 July 2026, all providers delivering SIL must also be registered with the Commission.

Frequently asked questions

What is the difference between SIL and SDA?

SDA is the specialist home itself, funded to the housing provider. SIL is the funding for support workers who help you inside that home. SDA pays for the building, SIL pays for the people.

Can you have both SIL and SDA?

Yes. The NDIS confirms that some people have both SDA and SIL in their plans. Many participants living in SDA also have funding for in-home supports such as SIL.

Does SDA cover my support workers?

No. SDA does not include personal care, supported independent living, individualised living options, or assistive technology. Those supports are funded separately.

Does SIL pay my rent?

No. SIL is funding for support workers, not housing. In an SDA home, you pay a reasonable rent contribution and your day-to-day living costs, such as electricity.

Do I need SDA to get SIL?

No. You can receive SIL whether you live with other NDIS participants or on your own. SIL is about the support you need, not the type of home you live in.

How do I know if I qualify for SIL?

As a guide, SIL is generally for people who need active support for more than 8 hours a day, plus supervision across the rest of the 24 hours. Your my NDIS contact, treating health professional or planner can help you work out what suits your needs.

Who decides which one goes in my plan?

Both are decided with the NDIS through your planning process. Your support coordinator and treating health professionals can provide evidence about your housing and support needs.

How 1 Care Connect can help

1 Care Connect is a registered NDIS provider supporting participants and families across Western Sydney and regional New South Wales. We support people living in SDA and SIL homes, and our team is nurse-led, so clinical needs are looked after alongside everyday support.

If you are weighing up your home and living options, we are happy to talk it through and be upfront about what we can offer. You can read about our SIL support, explore SDA, or get in touch with our team.