Understanding Performance-Based Solutions

Not every building project follows a standard compliance pathway.

Some projects involve design constraints, existing building conditions, non-standard materials, fire safety considerations, access issues or architectural outcomes that may not fit neatly within a Deemed-to-Satisfy approach.

In these situations, a Performance-Based Solution may need to be considered.

Performance-Based Solutions are an important part of the building compliance framework. They allow a project team to demonstrate that a design can meet the relevant Performance Requirements of the National Construction Code, even if it does not follow the standard Deemed-to-Satisfy pathway.

This article explains what Performance-Based Solutions are, when they may be needed, and why they need to be carefully developed and documented.

A Performance-Based Solution is an alternative compliance pathway under the National Construction Code.

Instead of simply following a Deemed-to-Satisfy provision, the project team demonstrates that the proposed design satisfies the relevant Performance Requirements.

In simple terms, it is a way of asking:

Does this design meet the required performance outcome, even if it does not follow the standard prescriptive pathway?

A Performance-Based Solution is not a shortcut.

It must be supported by suitable assessment, evidence and documentation. The solution needs to clearly explain:

• what Performance Requirements are being addressed
• why a standard pathway may not be suitable
• how the proposed solution satisfies the required outcome
• what assessment method has been used
• what evidence or expert input supports the solution

The goal is to create a clear, justified and properly documented compliance pathway.

The NCC allows compliance to be achieved in different ways.

A Deemed-to-Satisfy approach follows the prescriptive provisions set out in the code. These provisions provide a more direct pathway because the design follows established requirements that are deemed to satisfy the relevant Performance Requirements.

A Performance Solution takes a different approach.

Instead of following the prescriptive pathway exactly, it demonstrates compliance with the relevant Performance Requirements through assessment, evidence and documentation.

In practice, a project may use:

• a Deemed-to-Satisfy Solution
• a Performance Solution
• or a combination of both

Many projects use mostly Deemed-to-Satisfy provisions, with a Performance Solution used only for a specific part of the design.

A Performance Solution may be needed when the design, site, building use or existing conditions do not suit a standard Deemed-to-Satisfy pathway.

This can occur in both residential and commercial projects, although it is often more common in complex projects, commercial buildings, existing building upgrades and non-standard designs.

Examples may include:

• alternative fire safety approaches
• complex access arrangements
• existing building constraints
• change-of-use projects
• unusual materials or construction methods
• non-standard layouts
• commercial fit-outs
• heritage or existing building limitations
• design outcomes that do not neatly align with prescriptive provisions
• mixed-use or more complex building types

The need for a Performance Solution should ideally be identified early.

If it is identified late in the process, it can create pressure, additional consultant work and avoidable delays.

A Performance Solution should be developed and assessed in a structured way.

The exact process will depend on the project, but it may involve:

• identifying the relevant Performance Requirements
• preparing a performance-based design brief
• agreeing on assessment methods
• carrying out the required analysis
• evaluating the results
• preparing a final report
• coordinating supporting documentation
• ensuring the solution is clearly understood by the project team

The process often requires input from relevant consultants or specialists.

For example, depending on the issue being addressed, this may involve input from:

• fire safety engineers
• access consultants
• structural engineers
• energy consultants
• acoustic consultants
• building surveyors
• architects
• other relevant specialists

The key is that the solution must be properly documented and capable of being assessed.

Performance Solution matters should be identified as early as possible.

When they are identified early, the project team has more time to:

• understand the compliance issue
• consider the right assessment pathway
• involve the right consultants
• coordinate design documentation
• prepare supporting evidence
• reduce last-minute pressure

When they are identified late, the process can become more difficult.

Late identification may lead to:

• redesign
• additional consultant reports
• delayed permit review
• inconsistent documentation
• unclear responsibility
• extra back-and-forth between project parties

Early advice helps the project team understand whether a Performance Solution may be required and what steps need to happen next.

A Performance Solution needs clear documentation.

It is not enough to simply say that an alternative approach should be acceptable.

The documentation needs to show how the proposed solution satisfies the relevant Performance Requirements.

Good documentation may include:

• the relevant NCC Performance Requirements
• the issue being addressed
• the proposed solution
• the assessment method used
• supporting calculations, evidence or expert judgement
• consultant input
• limitations or assumptions
• final report or determination material

Clear documentation helps the building surveyor, consultants and project team understand how the solution has been developed and assessed.

It also helps reduce confusion during the building permit process.

Performance Solutions can become difficult when they are not properly coordinated.

Common issues may include:

• the need for a Performance Solution being identified too late
• unclear performance requirements
• incomplete supporting reports
• consultant reports not matching the latest drawings
• assumptions not being clearly stated
• limited evidence supporting the proposed approach
• unclear responsibility between consultants
• missing documentation during permit review

These issues do not always mean the solution cannot proceed.

But they can create delays and make the approval pathway harder than it needs to be.

A structured approach helps reduce that risk.

A building surveyor can help identify when a Performance Solution may be relevant and what documentation may be needed to support the building permit process.

Depending on the role and appointment, this may include:

• identifying where a standard pathway may not be suitable
• clarifying relevant compliance requirements
• advising on documentation expectations
• reviewing supporting reports
• coordinating with the consultant team
• assessing whether the pathway is clearly documented
• providing an independent compliance perspective where appropriate

The role is not just to create more paperwork.

The goal is to support a clear, practical and properly documented pathway through the approval process.

Performance-Based Solutions can be valuable when a project needs flexibility, but they need to be handled carefully.

They should be identified early, developed properly and documented clearly.

When managed well, a Performance Solution can help a project respond to real design constraints while still addressing the relevant performance outcomes required by the NCC.

For project teams, the key is to avoid treating Performance Solutions as an afterthought.

The earlier the pathway is understood, the easier it is to coordinate the right advice, prepare the right documentation and move forward with more confidence.