Landfill levy sharpens case for reclaimed timber

Dumping construction waste just got more expensive. From July 1, the levy on construction and demolition waste sent to landfill rose from $35 to $40 a tonne, a 14% jump in a single step.

Construction and demolition waste makes up 40 to 50% of everything New Zealand sends to landfill, and timber is the single biggest material in that pile, accounting for around 20% of construction waste by weight according to an Auckland study.

Each new home built generates an average of four tonnes of waste, and with the levy now applied per tonne, every load of timber that leaves a site instead of being reclaimed comes with a bigger bill attached.

For years, reclaimed timber was sold mainly on look and sustainability credentials, often costing more than new timber once milling, treatment and preparation were factored in. Diverting old structural timber for reuse now avoids a real, rising disposal cost too, adding a dollar figure to an argument that used to rest on story alone.

What was once mostly feature walls and statement furniture is now specified for structural framing, exposed beams and flooring across both residential and commercial fit-outs, taking advantage of timber salvaged from old-growth buildings that is often denser and more stable than equivalent new-growth material.

On the residential side, homeowners renovating character villas are increasingly matching reclaimed timber to original building fabric rather than introducing a visibly new material into a period home. Commercially, it’s turning up in retail and office flooring and exterior cladding, valued as much for durability in high-traffic spaces as for its look.

There are practical steps worth taking now rather than waiting for the levy to climb further. Start with a simple waste sort at the skip, separating timber, plasterboard, metal and packaging rather than sending it all to landfill as mixed waste.

Industry research shows sorting alone can divert at least half of a project’s waste from landfill, and given timber makes up roughly a fifth of site waste by weight, even a basic separation system pays for itself quickly at $40 a tonne.

On the specification side, it’s worth pricing reclaimed timber against new for structural framing, flooring and feature work at the quoting stage rather than treating it as an afterthought once a client asks.

For anyone managing a demolition or major renovation, it’s also worth checking early whether structural timber coming off the old build can be assessed and diverted for reclamation, a decision far easier to make at the planning stage than once demolition is already underway.