Lower North Shore · AS 3660.1
Perimeter and under-slab termite barriers fitted before the pour on Chatswood West rebuilds, on the ridges and valleys either side of the Lane Cove River near Ferndale Park and Mulhall Park.
Quick answer
Yes, a knockdown rebuild or new home in Chatswood West needs a termite management system before a certifier will sign off. The suburb is termite-prone, split between the City of Willoughby and the City of Ryde, so a system meeting AS 3660.1 is required, with collars and under-slab work finished ahead of the pour. We supply the meter box notice and certificate for whichever council applies.
Termite barriers in Chatswood West
Chatswood West is a low-density residential suburb about 9.1 km north-west of the CBD, split between the City of Willoughby and the City of Ryde. It straddles the Lane Cove River, with valleys, ridges and bushland that include Ferndale Park, walking tracks and two entrances to Lane Cove National Park. Its housing stock is overwhelmingly detached houses, with few local shops, so residents shop in Chatswood and Macquarie rather than in the suburb itself. New building work here is almost always on an existing residential block, a knockdown rebuild, an extension, or a secondary dwelling, since there is little vacant land left to subdivide, and each still needs a compliant termite system signed off before it can be occupied.
Living this close to a national park brings bushland termite pressure right to the back fence on many Chatswood West blocks. Mature blackbutt and other trees overhang roofs on the valley streets, and the ground along the river and its tributary gullies holds moisture for longer than it would on a ridge. Termites forage from the bush through that damp soil until they find a slab edge, a pipe penetration, or a garden bed built up against the building line. Because the block itself often falls away toward the river, footings and sub-floors are as much a concern here as the slab, so we look at the whole structure rather than just the ground-level perimeter.
Reviewed by Ismail, founder · Lower North Shore coverage · Updated September 2026 · More Lower North Shore suburbs
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Local conditions
Three features of the Lane Cove River valley shape termite risk on a Chatswood West block.
Chatswood West backs directly onto Lane Cove National Park at two points, and termites forage from that bushland through the soil toward the nearest structure. Blocks closest to either entrance usually need a full perimeter system rather than a partial run.
The suburb straddles the Lane Cove River, and valley streets running down toward it hold ground moisture longer than the ridges above them. That kind of persistent dampness is what lets subterranean termites move toward a new slab or footing without ever breaking the surface.
Where a block falls away toward the river, houses are often built with piers and a suspended timber floor rather than a simple slab. Those bearers and floor timbers need the same protection as a slab edge, so we plan for sub-floor access as part of the job.
What we install here
Chatswood West work is almost entirely knockdown rebuilds, extensions and secondary dwellings, since there is barely a vacant block left anywhere in the suburb. Waffle pod and raft slabs suit the flatter ridge-top sites, while piers and suspended floors are common on the streets that fall away toward the Lane Cove River. The plumber's rough-in sets the timing for collars, and we price every stage of the job, slab or suspended floor, in one fixed written quote from the plans.
Local knowledge
Most of our Chatswood West jobs sit near Ferndale Park or Mulhall Park, where mulch and leaf litter shelter the kind of activity that eventually finds its way to a nearby slab. Chatswood Golf Club's irrigated fairways add further moisture on the suburb's eastern edge, and Blue Gum Reserve, closer to the national park boundary, is where the bushland pressure is strongest. With national park entrances on two sides of the suburb, we treat sub-floor and roof void checks as standard, not optional.
Depending on exactly where a Chatswood West block sits, the build is certified through either the City of Willoughby or the City of Ryde. Both want the same paperwork on file before releasing an Occupation Certificate: a weatherproof notice screwed up in the meter box so a future owner can find it, plus a certificate covering the products used, the licensed installer and the parts of the building protected. On sloping, suspended-floor sites we also note the pier and bearer protection on that certificate, since a certifier will check it against the engineering drawings.
Chatswood West at a glance
| Suburb | Chatswood West, NSW 2067 |
|---|---|
| District | Lower North Shore |
| Distance from Sydney CBD | 9.1 km north-west |
| Certifying council | Sydney CBD Council |
| Standard applied | AS 3660.1 termite management systems |
| Installed | Before the slab pour, then staged through the build |
| Documents supplied | Installation certificate and durable notice |
| Typical builds covered | New homes, knockdown rebuilds, granny flats, duplexes, townhouses |
Systems we install
Every photo below is from one of our own Sydney jobs. We look at your slab design, site and budget, then recommend a system or a combination.
01A termite-resistant sheet laid over the whole prepared footprint before concreting, so termites can't come up through the slab anywhere.
02A sealed collar on every pipe, conduit and service that passes through the slab. These gaps are the most common hidden way in.
03Protection at the slab edge and into the wall cavity, which stops termites building hidden tunnels up the outside of the slab.
04An APVMA-registered termiticide zone in the soil, with an optional pipe network under paving so it can be recharged later without digging.
05Barriers for bearers, piers and raised timber floors on sloping or elevated blocks, where there's no slab to protect.
06Detailing for sandstone cuts, block retaining walls, step-downs and cut-and-fill sites, which are common across Sydney.
Why during construction
A retrofit can only treat around a finished house. A pre-construction system protects the parts nobody will ever be able to reach again.
A barrier put in during the build costs a fraction of a post-construction system, and far less than repairing termite damage.
New houses (Class 1) and outbuildings (Class 10) with termite-susceptible framing need a compliant termite management system.
Pipe penetrations and slab joints can only be fully protected while they're still open, before the concrete goes in.
An under-slab system covers ground that no treatment from outside the finished house can ever reach.
Your certifier needs the certificate and durable notice before issuing the Occupation Certificate. We supply both together.
Documented, compliant protection gives buyers, building inspectors and lenders confidence when the home is sold.
Installation stages
A termite barrier isn't a single visit. Each part goes in when the site is ready for it, and we fit around your plumber, concreter and bricklayer.
Send your plans and slab details. We recommend a system and give you one fixed price that covers every stage.
Collars go on every service once the plumber has set out, then the membrane or soil treatment is installed across the prepared site.
Perimeter and cavity protection is fitted as the brickwork or cladding goes up, so there's no unprotected gap at the slab edge.
Where it's specified, the chemical perimeter or reticulation system is completed around the building before paths and gardens go in.
A durable notice goes in the meter box, and the installation certificate goes to your builder and certifier.
The owner gets simple care instructions and an inspection schedule so the system keeps doing its job for years.
Compare systems
Both can meet AS 3660.1. The best choice depends on your slab type, what surrounds the house and how much ongoing upkeep the owner wants.
Physical protection
Entry-point protection
Soil protection
Top-up protection
Most of the Sydney builds we work on use a combination: physical collars on every penetration plus a physical or chemical perimeter.
For builders & developers
Builders, developers and owner-builders get a fixed quote from plans, a technician who turns up when the site is ready, and paperwork that never holds up sign-off.
Consistent pricing across lots, one point of contact and a full document set for every dwelling.
Missing durable notices and unclear install records are a common reason Occupation Certificates get held up. We hand everything over together so your certifier has it all in one go.
Paperwork
A complete document set for the builder, the certifier and every future owner of the property.
A permanent notice in the meter box showing the system, install date, installer, any chemical's life expectancy and inspection advice.
For: certifier, owner, future owners
Written confirmation of the system and products used, the areas protected and our licence details.
For: builder, certifier, owner
Details of the physical system or termiticide installed, including safety data sheets for any chemicals.
For: builder, owner
How to keep the system working, plus the recommended inspection frequency under AS 3660.2.
For: homeowner
From real jobs
Photos from our own Sydney sites, not stock images. Tap any photo to see it larger.
Membrane barrier across a large residential slab
Barrier work on a Sydney Harbour site
Installation through sandstone excavation
Perimeter barrier and sleeves on a new slab
Waffle pod formwork with collared penetrations
Membrane detailed against a retaining wall
Membrane sealed around a column
Protected slab edge with collar in place
Collared penetrations before the pour
Perimeter barrier on a completed slab edge
Pipe penetrations sealed into the membrane
Collars fixed through mesh before concreting
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Pricing
Every build is different, so we don't guess. We price from your plans and give you one fixed written quote. Quoting is free.
After handover
A barrier only works while it stays intact and visible. Pass these on to the owner.
Free fixed quote
Tell us about your build and get a clear, fixed price, fast. We usually reply within 30 minutes during business hours.
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Chatswood West questions
Still unsure? Call and talk it through with a licensed technician.
+61 450 515 215Blocks closest to either of the suburb's two Lane Cove National Park entrances face more direct termite pressure than streets further from the bush, so we usually recommend a full perimeter system there rather than a partial one. Roof voids and any overhanging trees also get checked on these blocks, because a mature tree touching the roofline can give termites a route that skips the barrier entirely.
Yes. Where a Chatswood West block falls away toward the river and the house sits on piers with a suspended floor, we protect the bearers, piers and floor timbers rather than relying on a slab-edge barrier alone. It is still installed to AS 3660.1 and still needs an installation certificate, just detailed differently to suit the structure.
It depends on which side of the suburb your block sits, since Chatswood West is split between the City of Willoughby and the City of Ryde. We confirm which council is certifying your build before finishing the paperwork, so the durable notice and installation certificate match what that particular certifier expects to see at handover.
In most cases, yes. The National Construction Code requires a termite management system for new houses and outbuildings in termite-prone areas where the primary building elements can be damaged by termites. Sydney is termite-prone, so the system is installed to AS 3660.1 and your certifier asks for the installation certificate and durable notice before the Occupation Certificate is issued.
It depends on slab area, perimeter length, the number of pipe penetrations, the system chosen, site complexity and how many visits the build needs. Send us the plans and we return one fixed written quote covering every stage. Quoting is free.
Nearby
Same crew, same staging and the same certifier-ready paperwork, right across the Lower North Shore.
Service areas
From the Eastern Suburbs and Inner West to the Hills, the Shire and the western growth corridors. Every suburb has its own page with the local ground conditions, the council that certifies the work and the questions builders there ask us.
Slab pour coming up?
Send us your plans today for a fixed quote, or call and talk to a licensed technician about your site.
