Termite Treatment Cost in Sydney per Linear Metre

If you've had a quote that prices termite work by the metre rather than as one flat number, this is why. Some termite jobs are priced on a linear-metre basis because the amount of work scales directly with the length of the perimeter being treated, not with the size of the house as a whole. This post explains where that pricing method shows up, what drives the number up or down, and how to read a metre-based quote so you know what you're actually paying for.

Where per-metre pricing comes from

The clearest example is pre-construction termite sheeting, which I price at $14 per linear metre. Sheeting is a physical barrier installed along the slab perimeter before the concrete is poured, so the material and labour both scale with the length of that perimeter. A longer slab edge means more sheeting, more sealing at joins, and more time on-site. A typical invoice for this kind of job lands in the vicinity of the perimeter measured on the day, which is why two houses with different footprints end up with different totals even though the rate per metre hasn't changed.

Chemical barrier work on an existing home works on a similar logic, even when the final quote comes back as one number rather than a rate. A Termidor chemical barrier is applied around the foundation, and the length of that foundation, plus the number of piers, penetrations and access points along it, is the main driver of how much product and labour the job takes. A compact single-storey home with a simple rectangular slab is a shorter perimeter to treat than an L-shaped double-storey home with extensions. That's the main reason a full chemical barrier treatment on an existing home averages around $5,000, but moves up or down from there depending on the property.

Why perimeter drives the number, not floor area

It's a common assumption that a bigger house automatically costs more to treat, and that's only sometimes true. Floor area and perimeter length don't always move together. A large single-storey home with a simple square footprint can have a shorter perimeter than a smaller home with lots of external corners, wings or extensions. Since termites travel along the ground and enter through the foundation or subfloor, the barrier has to run the full length of that perimeter to be continuous. Extra corners and awkward shapes mean more linear metres of trenching, sheeting or treatment, even if the internal floor area is modest.

Access also plays a part. A subfloor that's easy to reach along its full perimeter is faster to treat than one with limited crawl height, obstructions, or sections that need extra digging to expose the slab edge properly.

How to read a metre-based quote

If you're comparing quotes and one is priced per metre while another is a flat figure, ask for the perimeter measurement behind the flat figure. A properly measured quote should reflect the actual length being treated, not a rough estimate. I measure the perimeter on-site as part of pricing every job, because that's the only way to give an accurate figure rather than a guess.

A metre-based quote isn't a sign of anything unusual. It simply reflects that the work is proportional to distance, in the same way the price of fencing or guttering scales with length. What matters is whether the rate is reasonable and whether the perimeter has actually been measured, not estimated from memory or a floor plan alone.

Common questions

Why is termite sheeting priced by the metre instead of a flat fee?
Because the material and labour both scale directly with the length of slab perimeter being sheeted. A $14 per metre rate applied to an accurately measured perimeter gives a fairer price than a flat fee that doesn't account for the size of the job.

Does a bigger house always cost more to treat?
Not always. Perimeter length matters more than floor area. A large home with a simple, compact footprint can have a shorter perimeter than a smaller home with an irregular shape, and the barrier follows the perimeter, not the floor space.

Is chemical barrier treatment on an existing home quoted per metre too?
It's usually quoted as one total figure, but that figure is still driven by the length of the foundation being treated, the number of piers, and how accessible the site is. The average for a full treatment on an existing home is around $5,000, moving up or down from there.

Can I get an exact per-metre price over the phone?
I can talk you through how the pricing works, but the exact figure depends on measuring the perimeter and checking access on-site.

Sanity-checking your own quote

If you've had a quote and want a second opinion on whether the perimeter and pricing stack up, call me on 0405 790 927. For the full picture on what a termite job costs overall, including inspection fees, see the companion guide on termite treatment and inspection pricing in Sydney.