Home modification (HM) assessments

The NDIA needs sufficient evidence to decide which HM supports are reasonable and necessary to include in a participant’s plan.

Plans include funding for a HM assessment and should also include advice on the scope of the home modification to be assessed (for example, improved access to the bathroom).

Guidance for Home Modifications Assessors (DOCX 214KB) Guidance for Home Modifications Assessors (PDF 317KB).

Assessment template

Using the HM assessment template ensures the NDIA has the information needed for planning and approval and helps avoids delays.

Use the consent clause to ensure the participant has given the NDIA permission to discuss the assessment and/or quotes with the provider(s) concerned directly.

Participants may follow different processes, depending on the scope and complexity of the proposed home modifications.

For further information refer to the NDIS Assistive Technology Complexity table.

Complex home modification (CHM) assessments

When providing CHM assessments, the NDIA encourage you to use the Complex Home Modification Guide for builders and assessors. This guide explains the NDIS reasonable and necessary guidelines and what information is required for an assessment to be approved.

Complex home modifications guide cover



The NDIA released interim guidance on the characteristics that an assessor of CHM supports should demonstrate:

  • Professional qualifications and meet the registration requirements as an Occupational Therapist.
  • A good understanding of the scope and purpose of the NDIS, particularly as it relates to the goals and use of supports in a participant’s plan to help them to lead an ordinary life.
  • At least one of:
    • Professional Credential: Associate Member or above of the Association of Consultants in Access Australia (ACAA)
    • Successful completion of Nationally Recognised Training modules CPPACC4020A and CPPACC5016A
    • Employment at Senior Clinician level specifically responsible for CHM assessment
    • NDIS registered providers who successfully completed NDIA-authorised training in, and were selected through an Expression of Interest process for, CHM assessment during the trial phase of the NDIS prior to 30 June 2016.

Builder consultation

Where a participant requires CHM, and for some cases of HM, their plan will also include funding for a building professional to consult with the participant and their Occupational Therapist on the recommended works.

You should confirm with the participant that:

  • there is enough appropriate funding available in the current plan to pay for the builder’s consultation
  • using funding for this purpose has been agreed.

All NDIS-funded building works must comply with relevant laws and regulatory frameworks. This includes building codes and Australian Standards, which regulate home modifications.

CHM works often take longer to complete. All parties should be clearly informed and aware of requirements to provide an efficient process for participants.

Providing HM quotes

Participants are generally required to provide the NDIA with a quote from a builder.

Two quotes may be required for modifications exceeding $15,000.

The specification of HM and CHM work must be provided in sufficient detail to establish:

  • the dimensions of the area being modified (for example length, width and height of walls to be tiled);
  • a separate costing for each stage of the job (for example demolition, plumbing and electrical work may be separate stages);
  • a description of any fixtures or items provided by the builder (including make, model and cost); and
  • an overall quote for the job, inclusive of GST (where applicable).

Pricing and payments for HM providers

You should work closely with participants to understand their needs and how you will be paid for supports and services you have provided.

Self-managed participants pay providers directly for HM supports and services.

If you are working with participants with NDIA-managed or plan-managed funding, the NDIS Pricing Arrangements and Price Limits outline the appropriate support items you should be claiming payments against.

Other information to support providers is available, including:

This page current as of
6 July 2021