New planning controls at Lang Lang, Oaklands Junction and Trafalgar are designed to protect the rock and sand supply that underpins residential construction across the state. Here is what builders need to know.

Rock and sand are not glamorous.

They do not make headlines the way interest rates or planning delays do. But without them, residential construction in Victoria stops.

That basic reality sits behind a planning decision that will quietly shape the state’s capacity to build homes, schools and hospitals for decades to come.

Three new Strategic Extractive Resource Areas, known as SERAs, have been approved in Victoria, covering sites at Lang Lang in Cardinia Shire, Oaklands Junction in Hume City and Trafalgar in Baw Baw Shire.

The designation does not open new quarries. What it does is protect those locations from being built over, preserving the option to extract construction materials in the future as demand grows and existing sources come under pressure.

Without extractive resources, there is no building. This decision is about making sure supply remains viable as suburbs expand.

What a SERA Actually Does

A Strategic Extractive Resource Area is a planning control, not a quarry approval.

It works by drawing a boundary around land that holds significant deposits of hard rock, sand or gravel. Once designated, development within that zone faces higher scrutiny. New housing, schools or commercial buildings cannot simply be approved if they would permanently sterilise the resource underneath.

The intent is to prevent what has happened elsewhere, where years of residential expansion have cut off viable extraction sites, pushing supply chains further from cities, raising costs and increasing the environmental footprint of material transport.

Any quarry proposal within a SERA will still go through the full planning and approvals process. Designation is a protection, not a green light.

Why Proximity to Growing Suburbs Matters

Each of the three designated areas sits within or adjacent to corridors experiencing sustained housing growth.

Lang Lang and the broader Cardinia Shire region have been under pressure for years as Melbourne’s south-eastern fringe expands. Oaklands Junction is in Hume City, which is part of the northern growth corridor where major residential projects continue to progress. Trafalgar sits within the Latrobe Valley, where reconstruction and regional development activity remains active.

As suburbs push outward, the distance between construction sites and raw material sources tends to grow. Longer haul distances drive up costs and create logistical complexity across the supply chain. Protecting nearby resource land means that as demand increases, viable extraction can occur without materials needing to travel further than necessary.

For builders and their suppliers, that matters at the margins, where delivery costs are a real line item and schedule reliability depends on material availability.

Protecting resource land close to growth corridors keeps supply chains shorter, costs lower and material availability more predictable.

The Consultation Process

The designation followed a period of consultation with local communities, industry and councils. Refinements were made to the boundaries of each area as a result, and the final controls include assessment requirements designed to manage impacts on surrounding land uses.

One of the consistent concerns with extraction sites is the relationship between quarry operations and nearby residential development. The SERA framework addresses this by also guiding where homes and other sensitive uses should not be built in proximity to active or potential extraction areas. The planning controls work in both directions.

What This Means for the Building Supply Chain

Australia’s construction industry relies on a steady supply of aggregates, a broad category that includes crushed rock, sand and gravel used across foundations, concrete, drainage and road base.

When supply is constrained, prices rise. When sources become concentrated or distant, supply chains become fragile. Builders in growth corridors have already experienced the downstream effects of tight material supply during the post-pandemic construction surge, with price escalations that were difficult to absorb mid-project.

Proactive protection of resource land does not solve those pressures immediately. But it creates the conditions for future supply to remain viable, reducing the risk of further concentration in the extractive sector and giving the construction pipeline greater certainty over the long term.

For builders and developers pricing work across multi-year programs, that kind of structural certainty has real value.

No New Quarries Without Full Approval

It is worth being clear on what this announcement does not do.

A SERA designation creates no right to quarry. It does not fast-track approvals or reduce the requirements for community consultation or environmental assessment. Any proponent seeking to establish extraction operations within a designated area will go through the same planning process as any other site.

What changes is the protection from incompatible development. If a residential subdivision or major commercial project were proposed over a SERA, the planning framework now provides a stronger basis to refuse or modify that proposal to preserve the resource.

The Bigger Picture for Builders

Construction materials supply tends to sit well below the line of visibility in industry discussions. The focus is usually on labour, finance, approvals and client demand.

But materials are a foundational constraint. When they become harder to access or more expensive to transport, the effects move through every layer of a project budget.

Decisions like this one, which may seem administrative from the outside, are part of the infrastructure that either supports or undermines the industry’s ability to deliver at scale. Getting ahead of supply risks before they become supply crises is the kind of long-term planning the industry benefits from, even when it does not generate much noise at the time.

Three new protected zones. Three locations where the material the industry depends on will not disappear under a subdivision before it can be extracted.

It is not a headline. But it is the kind of decision that quietly matters.

For more news, analysis and resources built for Australian residential builders, visit thegoodbuilder.com.au or subscribe to The Good Builder podcast.

Author: TGB Editorial