A Guide to SDA Design Categories: Which One is Right for You?

If you're exploring Specialist Disability Accommodation (SDA) as part of your NDIS plan, one of the first things you'll encounter is the concept of SDA design categories. There are four categories, each designed to support different types of disabilities and functional needs. Understanding these categories is essential for finding the right home.

The Four SDA Design Categories

The SDA Design Standard defines four design categories, each with increasing levels of physical accessibility and specialist features.

1. Improved Liveability

Improved Liveability homes are designed for people with sensory, intellectual, or cognitive disabilities. The focus is on creating a living environment that is easier to navigate and understand. Key features include:

• Luminance contrast between walls, floors, and doors to aid orientation

• Consistent, even lighting throughout the home

• Simplified layouts with clear sightlines

• Reduced background noise through acoustic treatments

• Easy-to-use fixtures and fittings (lever handles, rocker switches)

  
  

Best suited for: Parteciants with autism spectrum disorder, acquired brain injury, intellectual disability or vision impairment.

2. Fully Accessible

Fully Accessible homes provide a physically accessible environment for people who use wheelchairs or other mobility aids. These homes incorporate universal design principles with a focus on unimpeded movement throughout. Key features include:

• Step-free access throughout the home and to outdoor areas

• Wide doorways (minimum 950mm clear opening) and corridors (1200mm)

• Accessible kitchen with adjustable-height benchtops

• Roll-in shower with hobless entry

• Reinforced walls for future grab rail installation

  
  

Best suited for: Participants who use manual or powered wheelchairs, walking frames, or other mobility aids.

3. Robust

Robust homes are built with enhanced durability to withstand behaviours of concern that might damage a standard home. These dwellings incorporate all features of Improved Liveability, with additional resilient construction. Key features include:

• Impact-resistant wall linings and surfaces

• Secure, tamper-resistant fixtures and fittings

• Reinforced doors, frames, and hardware

• Secure glazing and window treatments

• Calming design elements (colours, textures, sensory spaces)

  
  

Best suited for: Participants who display complex behaviours that may cause damage to standard housing.

4. High Physical Support

High Physical Support is the most physically accessible SDA category. These homes include all Fully Accessible features plus additional structural and technological provisions for participants with very high physical support needs. Key features include:

• Ceiling hoist systems (or structural provision for installation)

• Automated doors with remote/switch activation

• Emergency power supply for essential equipment

• Smart home technology for environmental control

• Assistive technology integration throughout

• Higher-specification bathroom and kitchen accessibility

  
  

Best suited for: Participants with significant physical disabilities requiring high levels of personal care and assistive technology.

How to determine Your Design Category

Your SDA design category is determined as part of your NDIS Home and Living assessment. The NDIA considers your functional capacity, disability-related needs, and the type of environment that will best support your independence and safety.

Your support coordinator, occupational therapist, or the dwellSDA team can help you understand which category best matches your needs. In many ca

ses, a functional capacity assessment by an occupational therapist will form part of the evidence supporting your Home and Living request.

Can I Get a Home That Combines Categories?

Yes — many SDA homes incorporate features from multiple design categories. For example, a High Physical Support home will inherently include Fully Accessible features. At dwellSDA, we design our modular homes to be flexible and customisable, ensuring every participant gets the features they need regardless of category boundaries.

If you're unsure which SDA design category is right for you, contact our team for a free consultation. We're here to help you navigate the process and find the right home.