Victoria has thousands of registered Specialist Disability Accommodation (SDA) dwellings, funded through the National Disability Insurance Scheme (NDIS), and many sit vacant. The national SDA vacancy rate was around 42% in late 2024: more than four in ten approved dwellings unoccupied at some point in that period.

That number should shape every site decision. The investors tenanting quickly and the ones carrying year-long vacancies usually made the decisive call before construction began. Location is the most controllable variable, and it is fixed the moment you settle the site. This post draws on PDH's experience managing SDA across Melbourne and regional Victoria to show where genuine unmet demand sits in 2026, and where it does not.

For how the SDA payment system works, the SDA Funding Explained post covers the payment flow from the National Disability Insurance Agency (NDIA) to the provider.

Why location is the biggest vacancy risk in SDA

Design category and location are both locked at build time. You can't convert an Improved Liveability (IL) building to High Physical Support (HPS) later without structural work, and once the site settles, the participant catchment is set.

Three vacancy drivers follow from location. Design-category demand varies by SA3 region, so an HPS dwelling in a suburb with few HPS participants sits longer than one where demand is confirmed. Supported Independent Living (SIL) provider coverage is radius-dependent, and a dwelling is only tenantable if a SIL provider can roster staff to it, so thin SIL coverage strands even a well-built property. And participant networks are proximity-dependent: placement data consistently shows participants and families prefer locations near existing family, community and healthcare, so dwellings near established participant populations fill faster.

Returns depend on category, location, building type and occupancy. PDH's SDA Price Guide 2026 summarises current payment rates, which the NDIA updates each 1 July.

How to read the SDA demand data for Victoria

The NDIA publishes a free demand data tool. Run it before committing to any site. Filtered by SA3 region and design category, it shows the gap between participants assessed as needing SDA and approved dwellings, and it updates quarterly. A large gap for your planned category in your target SA3 is a positive demand signal.

Its limits matter as much as its signal. The tool does not show waitlists, time-to-match, or whether the unmatched participants actually want to live in that SA3 rather than one nearer family. Treat it as a signal, not a verdict. Support coordinator activity, SIL rosters and family locations move real occupancy in ways the regional data cannot capture. A site in a high-demand SA3 with poor SIL access and limited accessible transport can still carry real vacancy risk.

NDIS SDA demand data tool: ndis.gov.au/.../sda-demand-data

Which design categories have the most unmet demand in Victoria

The four categories are not equally positioned. For the full build requirements behind each, see PDH's SDA Design Categories guide.

High Physical Support (HPS) has the largest unmet demand nationally and in Victoria, and the highest NDIS payment rate (current figures on the NDIS pricing arrangements page). It is also the hardest to build: ceiling hoists, emergency backup power, enhanced accessible fitout. That complexity is why supply lags demand, and why it is the strongest demand-side case for developers who can execute it well. One watch item: the KPMG review of the SDA Design Standard (consultation closed early 2026, recommendations expected mid-2026) may change HPS requirements, so confirm specifications before locking them in.

Fully Accessible (FA) is undersupplied against assessed demand, particularly in established inner suburbs, and is simpler to build than HPS. The gap is widest where accessible dwellings near hospitals, transport and support networks are scarce.

Robust serves participants with complex behaviour support needs and carries a specific design standard. The gating risk is not build cost but finding a SIL operator with the clinical capacity to support residents in that category, in your location. Some areas already show oversupply.

Improved Liveability (IL) has the most modest requirements and the lowest payment rate, and supply has outpaced demand in many regions. Unless the demand tool shows a real SA3 gap for IL where you are building, it is the weakest case for new builds in 2026.

Where in Victoria is there genuine SDA demand in 2026

This is PDH's operational read, supported by public NDIA data. It does not fabricate suburb-level statistics. For postcode-level numbers, run the demand tool for your SA3 region and category.

Inner Melbourne

Inner Melbourne remains one of the strongest areas for genuine SDA demand.

The demand is supported by established participant communities, strong SIL provider coverage, accessible public transport, proximity to major hospitals and access to services. Locations close to Royal Melbourne Hospital, the Royal Children’s Hospital, St Vincent’s Hospital and other key health networks continue to provide a strong case for well-designed SDA.

Inner Melbourne is not usually the cheapest development location, but it is one of the most defensible from a demand and vacancy-risk perspective.

Inner North and Northern Corridor

The Inner North and northern corridor continue to show strong demand, particularly in areas extending through Preston, Reservoir, Thomastown and surrounding suburbs.

This is where Paramount Disability Homes already has operational experience and confirmed participant demand. The area benefits from established families, existing SIL networks, accessible rail and tram corridors, and proximity to health, community and employment services.

For SDA developers, the Inner North through to Thomastown presents a stronger case than many outer-fringe locations because it combines participant demand with real support provider capacity.

Outer East

The Outer East is another area where demand should be taken seriously.

Suburbs across Melbourne’s eastern corridor often provide better access to established communities, family networks, hospitals, allied health services and disability support providers than some newer growth corridors.

For SDA participants, location is not just about the dwelling. It is about proximity to family, support workers, medical services, transport and community participation. The Outer East can provide a more practical long-term housing outcome when the site is selected carefully.

Mornington Peninsula

The Mornington Peninsula is a strong SDA opportunity when approached correctly.

The region has an established participant base, ageing family networks, limited suitable specialist housing options and a lifestyle setting that can be attractive for participants seeking long-term stability.

However, developers still need to be careful. Not every site on the Peninsula will work. Proximity to transport, SIL availability, medical services and community infrastructure must be tested before acquiring land.

Western Corridor: Do Not Assume Demand

The western corridor should be treated with caution, particularly beyond established areas such as St Albans.

While areas such as Tarneit, Truganina and Werribee are commonly promoted because of land availability and lower entry costs, developers need to understand the vacancy risk. Heavy SDA construction over recent years has placed pressure on occupancy in some western growth areas, especially where SIL coverage, participant demand and transport access are thinner than expected.

Cheap land does not automatically create a strong SDA investment. If the participant base, support provider network and location fundamentals are weak, the property may sit vacant.

South East Growth Corridor: Be Careful

Developers should also be cautious in parts of the South East growth corridor, including areas such as Clyde North and Cranbourne.

These markets have seen strong levels of disability housing interest and development activity. While there may still be individual opportunities, the area should not be treated as a guaranteed SDA demand zone.

Before building, developers should verify:

• Local SDA demand by category
• Existing and upcoming SDA supply
• SIL provider availability
• Transport access
• Hospital and allied health proximity
• Participant referral pathways
• Whether the proposed design matches actual participant needs

The Key Message for SDA Developers

Cheap land in a low-demand location does not lift your SDA return. It increases your vacancy risk.

The strongest SDA development opportunities in Victoria are not always where land is cheapest. They are where participant demand, SIL coverage, transport, health services and long-term community connection all align.

Based on Paramount Disability Homes’ operational experience, developers should be paying closer attention to:

• Inner Melbourne
• Inner North through to Thomastown
• Outer East
• Mornington Peninsula
• Select established western suburbs up to St Albans

Developers should be more cautious in:

• Geelong
• Clyde North
• Cranbourne
• Tarneit
• Truganina
• Werribee
• Other outer growth corridors where land is cheap but participant demand is not proven

Before acquiring a site or finalising plans, SDA developers should speak with an experienced SDA provider who understands participant matching, SIL availability, enrolment requirements and long-term vacancy risk.

At Paramount Disability Homes, we work with SDA developers across Victoria to review location viability, design suitability, participant demand and provider strategy before and after construction.

What to check before committing to a site

Work through six checks, in this order, regardless of location.

Demand gap: for your SA3 region and planned category, is there a positive gap between assessed demand and approved dwellings? A negative gap is a red flag, and this check comes first.

Category match: the gap only counts if it is for the category you intend to build, so filter the tool by category.

Planning exemption: Victoria's Clause 52.22 exemption removes the planning-permit requirement for SDA in many contexts, though rules vary by local government area. Confirm your site's status early to avoid costly delays. PDH's post on Clause 52.22 planning exemptions covers how it works.

Transport and amenity: accessible public transport, healthcare proximity and community infrastructure define your real catchment.

SIL availability: contact SIL providers operating in the suburb before you buy. A dwelling without local SIL access is unlettable for participants who need support. This is the most common blind spot in site assessments.

SDA provider letter: a registered provider can supply a letter of intent to manage the dwelling, which the NDIA may consider at enrolment. Engaging a manager at design stage also gets you category feedback before the fitout is locked. PDH provides both.

How an SDA management partner reduces your occupancy risk

Advisory firms tell you where to build. They do not fill the dwelling. The SDA management service covers tenant sourcing and matching (participant profile, support needs, design category and location preference to the specific property), tenancy management, maintenance coordination, compliance oversight and enrolment assistance, plus the provider letter above.

PDH will not pretend to control what it cannot. NDIS plan timelines are the NDIA's decision, and a tenanted dwelling can vacate if a participant's circumstances change. Any firm implying immunity from that is not being straight with you. What PDH does control is access to Victoria's participant and support-coordinator network. Most managers source through the same general channels; PDH's existing relationships with coordinators, SIL providers and the participant community across Melbourne and regional Victoria reach the eligible pool a firm without local history cannot. The manager who already knows the coordinators placing participants in your target suburb fills faster.

For a demand read on a specific Victorian catchment, or full service detail, see paramounthomes.com.au/sda-management.

Conclusion

Three things decide SDA investment outcomes in Victoria: location, design category, and the manager you engage before the build finishes. Only location is fully yours to control before construction, and once the site and category are set, the catchment and demand alignment are fixed.

The 2026 read: inner Melbourne and Geelong show the strongest demand for new supply; the northern corridor is confirmed by operational data; the western growth corridor carries real oversupply risk. HPS and Fully Accessible hold the strongest unmet demand; IL is saturated in many regions.

To weigh a specific site or catchment before you commit, contact the PDH team.

Phone: (03) 9999 7418 Email: admin@paramounthomes.com.au Website: www.paramounthomes.com.au SDA Management: paramounthomes.com.au/sda-management