Loss of tree canopy
Across Victoria’s new planning framework, a combination of higher-density zoning, reduced setbacks, and standardised building codes is significantly changing how much space remains available for trees and vegetation on residential land.
While tree planting is still encouraged in principle, the practical ability to retain and establish canopy trees in private gardens and streetscapes is being reduced.
Smaller setbacks, less room for trees
One of the most direct impacts on tree canopy comes from reduced building setbacks under new townhouse, mid-rise, and activity centre controls.
With buildings now able to be constructed closer to boundaries:
- Front gardens are reduced in size
- Side and rear planting areas are constrained
- Root zones for large canopy trees are limited
- Mature trees are more likely to be removed during redevelopment
In many cases, there is simply not enough space left on a typical lot for meaningful tree canopy coverage.
Higher site coverage, less open ground
New planning codes also allow for higher site coverage and more intensive development envelopes.
This leads to:
- Larger building footprints
- Increased paving and hard surfaces
- Reduced permeable soil for planting
- Limited space for deep-rooted vegetation
Even where landscaping is required, it is often restricted to smaller or shallow-rooted plantings rather than large canopy trees.
Reduced canopy targets
Tree canopy requirements have been standardised and, in some cases, reduced under the new system.
This means:
- Lower minimum canopy coverage on private land
- Limited ability for councils to set stronger local requirements
- Less variation to reflect local climate or neighbourhood character
Over time, this weakens the overall urban forest structure across suburbs.
Loss through redevelopment cycles
While a single redevelopment may remove only one or two mature trees, the cumulative effect across neighbourhoods is significant.
As older homes are replaced by higher-density developments:
- Mature trees are progressively lost
- Replacement plantings are smaller and slower-growing
- Gaps in canopy coverage persist for decades
Because large trees take many years to establish, losses are effectively long-term.
Impact on streetscapes
Street trees and private garden trees together form the visible green character of Melbourne’s suburbs.
Reduced canopy leads to:
- Less shaded streets and footpaths
- Increased visual dominance of buildings and hard surfaces
- A more exposed and less green streetscape experience
- Loss of seasonal variation and natural character
This changes not just environmental outcomes, but how neighbourhoods feel and function.
Why this matters
Tree canopy is not decorative — it is essential urban infrastructure.
It provides:
- Cooling and heat mitigation
- Shade and outdoor comfort
- Habitat for birds and urban biodiversity
- Improved air quality
- Mental and physical wellbeing benefits
In a warming climate, canopy trees are increasingly critical for urban resilience.
What this means for Melbourne
The current planning reforms enable more intensive development on residential land, but do not ensure that tree canopy is adequately protected or replaced at a meaningful scale.
Without stronger requirements and space for mature vegetation, Melbourne risks:
- A gradual but widespread loss of suburban tree cover
- Hotter, less shaded neighbourhoods
- Reduced environmental and liveability outcomes
Once mature canopy is lost, it cannot be quickly or easily replaced — making protection at the point of redevelopment critical.