As part of our 4-part series on the challenges shaping housing delivery across NSW, this 2nd piece explores why infrastructure servicing capacity has become one of the biggest constraints on development.
Authored by Adrian Miller, Associate Director at AT&L
Rezoning Means Little Without Servicing Capacity
In theory, rezoning should unlock housing and employment growth.
In practice, infrastructure capacity increasingly determines whether development can actually proceed.
Across NSW, infrastructure servicing has become the single most decisive threshold issue affecting rezonings.
Regardless of strategic merit, housing demand or policy intent, land cannot realistically move forward if supporting infrastructure capacity cannot be demonstrated.
This includes:
- Water supply
- Sewer and wastewater servicing
- Road and transport capacity
- Electricity supply
- Telecommunications infrastructure
A failure in any one component can stall an otherwise viable rezoning.
The consequence is increasingly common across growth areas.
Land becomes technically rezoned but practically undevelopable.
Infrastructure Planning and Rezoning Are Out of Sync
One of the biggest structural problems in the current system is the mismatch between how rezonings are pursued and how infrastructure networks are designed.
Infrastructure networks operate across large catchments and corridors.
They require coordinated planning, sequencing and investment.
Rezoning activity, however, has increasingly become fragmented and site-specific.
Many rezonings are pursued opportunistically by individual landowners or developers responding to market demand.
Without precinct-level coordination, this creates several problems:
- Infrastructure delivery becomes inefficient
- Agencies hesitate to commit funding
- Servicing networks are delivered in non-optimal sequences
- Infrastructure costs increase significantly
The outcome is disconnected growth patterns and delayed housing delivery.
Why Infill Alone Cannot Solve the Problem
Successive governments have increasingly focused on infill housing and transport-oriented development.
From an infrastructure perspective, this makes sense.
Infill areas can often leverage existing assets and reduce upfront capital requirements.
However, many established areas are now approaching servicing limits.
In numerous transit-rich precincts:
- Water and sewer networks are nearing capacity
- Road networks are constrained
- Transport systems are overloaded
- Planned density has been reduced due to servicing limitations
This has already affected outcomes across several strategic precincts.
Projects initially planned around higher density assumptions have been scaled back or delayed because supporting infrastructure cannot accommodate projected growth. The result is a growing disconnect between planning ambition and infrastructure reality.
The Problem With Infrastructure Timing
Infrastructure planning operates on extremely long timeframes.
In many cases, major infrastructure planning, funding, design and delivery can take up to ten years.
Rezoning decisions, however, are often made years ahead of confirmed infrastructure delivery.
This creates a major strategic disconnect.
Land may be rezoned based on assumptions around future servicing that later prove:
- Delayed
- Unfunded
- Reprioritised
- Technically constrained
This issue is evident across multiple growth areas including:
- Greater Macarthur
- Wilton
- Catherine Fields
- Leppington
In many cases, rezonings progressed years ago while key servicing infrastructure continues to lag behind.
The consequence is simple.
Housing delivery slows.
Conservative Agency Thresholds Are Slowing Delivery
Infrastructure agencies are naturally risk-averse.
In many cases, agencies are reluctant to support rezonings unless full infrastructure capacity exists upfront.
From an operational perspective, this position is understandable.
Agencies are seeking to avoid:
- Service failures
- Reputational risk
- Funding shortfalls
- Interim servicing arrangements
The challenge is that development does not occur all at once.
Housing delivery occurs progressively over time.
Yet the current system frequently assesses infrastructure demand as though full development occurs immediately.
This creates unnecessary delays.
Early development stages are often capable of proceeding well before ultimate network upgrades are completed.
Why Staged Infrastructure Delivery Matters
A more responsive infrastructure model would align servicing delivery with:
- Development sequencing
- Actual absorption rates
- Staged land release
- Transitional servicing solutions
When managed properly, staged infrastructure delivery can:
- Accelerate housing supply
- Reduce upfront capital requirements
- Improve project feasibility
- Allow agencies to align investment with real demand
However, the current system often lacks:
- Flexible funding structures
- Governance frameworks
- Delivery coordination mechanisms
- Risk appetite
As a result, rezonings continue to wait for infrastructure certainty that may still be years away.
The Impact on Landowners and Developers
For landowners and developers, infrastructure uncertainty creates significant commercial risk.
Projects become increasingly difficult to underwrite when:
- Servicing timeframes remain unclear
- Infrastructure costs continue evolving
- Delivery sequencing is uncertain
- Agency support remains conditional
This directly affects:
- Feasibility
- Land value
- Funding availability
- Delivery timing
In practical terms, a rezoning without infrastructure certainty has limited commercial value.
Until servicing is secured and sequenced, land remains constrained, capital remains tied up and housing outcomes remain deferred.
Housing Targets Depend on Infrastructure Delivery
The current housing debate often focuses heavily on planning reform.
But planning reform alone will not deliver housing at scale.
Without aligned infrastructure planning, funding and sequencing:
- Rezonings will continue stalling
- Precinct activation will slow
- Housing delivery targets will remain difficult to achieve
Infrastructure is no longer a secondary consideration.
It is now the primary gatekeeper of development delivery.
Infrastructure is no longer a secondary consideration. It is now the primary gatekeeper of development delivery.
Our View on the Path Forward
From our perspective, infrastructure planning needs to be embedded much earlier in the rezoning process.
Future growth areas will require:
- Earlier agency coordination
- Clearer servicing sequencing
- Stronger precinct-level planning
- Funding pathways aligned to delivery timing
We also see a growing role for private capital in accelerating enabling infrastructure, provided offset and reimbursement frameworks become more certain and transparent.
Without stronger alignment between planning, infrastructure and funding, housing delivery targets will remain difficult to achieve.
In the next article, we will examine the commercial pressures now reshaping housing feasibility across NSW.
Including the growing impact of contributions, servicing charges and viability compression.
