For strata committees and apartment owners, Class 2 reforms have changed more than the paperwork around construction. They have raised the standard for who designs, declares and carries out work on residential apartment buildings in NSW. Where defects arise, the reforms also make disciplined investigation and properly coordinated rectification far more important.
A leaking roof, failed balcony membrane or cracking concrete element is not simply a maintenance issue when it affects a Class 2 building. It may involve regulated designs, safety obligations, statutory warranties, approvals and records that must align with the work performed. The practical outcome is clear: building repairs need to be scoped from the root cause, engineered where required, and delivered by suitably qualified practitioners.
What is a Class 2 building?
Under the National Construction Code, a Class 2 building is a building containing two or more sole-occupancy units, each being a separate dwelling. Most apartment buildings fall within this classification. Mixed-use developments commonly contain a Class 2 residential component above retail, commercial or parking areas.
The classification matters because NSW introduced a suite of reforms aimed at improving accountability in apartment design and construction. These reforms were developed in response to serious building defects, including water ingress, combustible cladding concerns, structural failures and inadequate coordination between design and construction.
While new developments are the most visible focus, the obligations can also affect remedial projects. Whether a particular repair package falls within the regulatory framework depends on its scope, the building elements involved and whether regulated design work is required. This should be assessed early, not after contractors are on site.
The purpose of Class 2 reforms
The central objective of the Class 2 reforms is to create clearer responsibility for the quality and compliance of apartment building work. Rather than allowing design intent, construction activity and final certification to sit in separate silos, the framework places greater emphasis on accountable practitioners and documented design compliance.
The key NSW legislation includes the Design and Building Practitioners Act 2020 and the Residential Apartment Buildings Act 2020. Together, these measures introduced practitioner registration requirements, regulated design declarations, building practitioner declarations and stronger intervention powers for serious defects.
For owners corporations, this is significant because a compliant process produces a clearer record of what was designed, why a particular repair was selected and who accepted responsibility for the work. That record can be valuable long after a project is complete, particularly when future maintenance, insurance claims, sales due diligence or defect disputes arise.
The reforms are not a guarantee that defects will never occur. They are a mechanism for improving the quality of decisions and increasing accountability when they do.
How the reforms affect remedial building works
Not every maintenance task on an apartment building will trigger the same obligations. Replacing isolated damaged tiles, repainting a common area or undertaking minor repairs may be treated very differently from rebuilding balconies, replacing a façade system or carrying out extensive waterproofing works.
The critical question is not whether the work is called a repair. It is whether its extent affects regulated building elements or requires design work that must comply with the Design and Building Practitioners framework.
Regulated designs and declared work
Regulated designs can apply to building elements such as waterproofing, structure and fire safety systems. On a substantial remedial project, these elements often overlap. For example, water ingress through an apartment balcony may stem from failed waterproofing, inadequate falls, poorly detailed door thresholds, cracked slab edges or façade junctions. Treating only the visible membrane failure may not resolve the cause.
Where a regulated design is required, it must be prepared by an appropriately registered design practitioner and accompanied by a design compliance declaration. Construction should then follow the declared design, with any material variations assessed and documented before the work proceeds.
This approach can appear more involved than a conventional repair quote. However, it reduces the risk of an owners corporation paying twice for a cosmetic solution that leaves concealed defects, drainage failures or structural deterioration unaddressed.
Registered practitioners and coordinated responsibility
The reforms place strong emphasis on registered practitioners performing the work for which they are accountable. Depending on the scope, a project may require registered design practitioners, engineers and a registered building practitioner.
For a strata manager or committee, this reinforces the value of a single coordinated delivery process. A remedial contractor should not simply receive an engineer’s report and begin work without testing the buildability of the proposed solution, confirming access constraints and identifying interfaces with existing services, finishes and occupied apartments.
A properly coordinated team brings the investigation, engineering input, design documentation, approvals, construction sequencing and quality controls into one accountable framework. This is particularly important in occupied buildings, where water protection, resident communication, safe access and staged works affect the success of the project as much as the repair detail itself.
Why root-cause analysis matters more under the reforms
Apartment defects rarely stay within one trade boundary. Water can enter at a roof termination and emerge several levels below. Concrete spalling may be driven by chloride contamination, carbonation, inadequate cover, failed coatings or long-term water penetration. Cracks may be cosmetic, but they can also indicate movement, corrosion or load-related issues requiring engineering assessment.
Class 2 reforms support a more rigorous approach because they make design, documentation and responsibility more visible. That visibility is only useful if the diagnosis is sound.
Before committing to a major rectification scope, owners corporations should expect investigation proportionate to the risk. This may include moisture testing, intrusive inspections, concrete sounding, cover meter testing, crack monitoring, review of existing drawings, façade access inspections and engineering assessment. The exact method depends on the defect, but the objective remains the same: identify the failure mechanism before selecting the repair system.
A low initial quote can become expensive if it assumes the cause without verifying it. Conversely, investigation has a cost and should be targeted. A competent remedial team will explain what is known, what remains uncertain and which findings are necessary to develop a durable repair strategy.
What owners corporations should ask before approving work
When a Class 2 remediation project is being planned, strata stakeholders should seek clarity on the project pathway rather than focusing only on the price. The most useful early question is whether the proposed works require regulated designs, declarations or registered practitioners under the current NSW framework.
They should also ask how the defect has been diagnosed, what building elements are affected, and whether the scope addresses contributing conditions as well as visible damage. A waterproofing proposal, for example, should consider drainage, flashings, terminations, substrate condition, movement joints and interfaces with doors, balustrades or façades.
The construction methodology should be equally clear. This includes resident access arrangements, protection against further water ingress, hazardous materials controls where applicable, testing and inspection hold points, photographic records, warranty information and the process for managing latent conditions.
Transparency at this stage protects both the committee and the contractor. It establishes what the project is intended to achieve, what assumptions have been made and how additional defects discovered during the works will be assessed.
Documentation is an asset, not an administrative burden
Building records are often incomplete, especially in older strata schemes or developments that have changed hands several times. Yet good documentation is essential when planning repairs to complex Class 2 buildings.
A well-managed remedial project should leave the owners corporation with practical records: investigation findings, relevant engineering documentation, approved repair details, product information, inspection records, variation documentation and completion information. These records help future committees understand what was repaired and how it should be maintained.
They can also support more informed asset planning. A façade repair may reveal that only certain elevations require immediate intervention, while other areas can be monitored and programmed over time. That distinction allows owners corporations to prioritise safety and water-tightness without treating every building issue as an urgent full replacement.
A disciplined pathway for complex repairs
Class 2 reforms have made it harder to rely on informal, trade-by-trade defect repairs for significant apartment building issues. That is a positive shift when the work involves structural performance, water-tightness, fire safety or compliance-critical building elements.
At Remedial Building Practitioners, the focus is on connecting diagnosis, engineering coordination and on-site delivery so the repair scope responds to the actual condition of the building. For Sydney strata properties, this is especially valuable where ageing construction, coastal exposure, occupied apartments and access constraints can complicate otherwise straightforward work.
The right pathway will depend on the building and the defect. What should not vary is the need for clear responsibility, technically appropriate design and workmanship that protects the asset beyond the next rainfall or maintenance cycle.
