Blacktown & Mount Druitt · AS 3660.1
Collars, membrane and perimeter protection installed before the pour on Hassall Grove knockdown rebuilds, replacing ageing homes from the 1980s Housing Commission subdivision near Mittigar Reserve.
Quick answer
A new home in Hassall Grove needs a termite management system, since the City of Blacktown falls within a termite-prone area recognised by the NCC. The system follows AS 3660.1 and is fitted before the slab is poured, not afterwards, with collars on every service penetration. Your certifier then needs a durable notice from the meter box and an installation certificate before the Occupation Certificate is issued.
Termite barriers in Hassall Grove
Hassall Grove was subdivided by the NSW Housing Commission in the 1980s, and its quiet grid of family homes, bordered by Dean Park, Bidwill, Glendenning and Hebersham, is now old enough that knockdown rebuilds are common on the original blocks. Whatever protection those 1980s houses had has generally run its course, so a rebuild is treated as a clean slate: the certifier will not sign off the new build without a fresh, compliant termite management system, regardless of what was there before. Small pockets of granny flat and secondary dwelling work also turn up on the larger corner blocks scattered through the grid.
Forty-plus years of settling has its own effect on these blocks. Eaves linings shrink and open gaps, seals around doors and windows harden and crack, and timber in garden edging or pergolas breaks down close to the walls, all of which change how termites can approach a structure. That kind of ageing housing stock is exactly why the standard requires new protection rather than simply trusting an original system that has had decades to fail quietly, unnoticed until an inspection finds the damage. A rebuild is the one point where every one of those small failures can be designed out properly, rather than patched around.
Reviewed by Ismail, founder · Blacktown & Mount Druitt coverage · Updated September 2026 · More Blacktown & Mount Druitt suburbs
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Local conditions
Three things about Hassall Grove's older housing stock shape how a rebuild's barrier gets planned.
Homes from the original Housing Commission subdivision are old enough that any termite treatment installed at the time has generally broken down. A rebuild is the point where that history is cleared and a properly certified system goes in fresh.
Small reserves like Mittigar Reserve are tucked between streets across Hassall Grove, and their leaf litter and soft soil can support termite activity close to neighbouring back yards. Blocks near one of these pockets get a closer look at the perimeter.
Decades of settling on these original blocks has opened gaps in eaves linings and door and window seals, and garden edging and pergolas built from timber have often begun to break down against the house. A rebuild clears all of that and starts again properly.
What we install here
Most of our Hassall Grove work is knockdown rebuilds on the original 1980s house blocks, plus the occasional granny flat on a larger corner lot. Waffle pod and raft slabs are standard, and a collar goes on every penetration as soon as the plumbing is roughed in. Our visit slots in ahead of the concreter's arrival, and one fixed quote priced from your plans covers the job through to the certificate your certifier requires.
Local knowledge
Our Hassall Grove work is spread across the original grid of streets bordered by Dean Park, Bidwill, Glendenning and Hebersham, with small reserves like Mittigar Reserve tucked between blocks throughout the suburb. Sites near one of those reserves get slightly more attention to perimeter detailing, while the rest of the suburb is generally standard waffle pod rebuild work with a typical collar count.
The City of Blacktown certifies new building work in Hassall Grove, and before signing off occupation, its certifiers want to see a durable notice in the meter box alongside a signed record naming the products used, the areas treated and who installed them. Both are ready for you once the barrier work is complete, together with maintenance advice suited to an older, established suburb like this one.
Hassall Grove at a glance
| Suburb | Hassall Grove, NSW 2761 |
|---|---|
| District | Blacktown & Mount Druitt |
| Distance from Sydney CBD | 37.4 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
Google reviews
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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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Hassall Grove questions
Still unsure? Call and talk it through with a licensed technician.
+61 450 515 215No. Any original treatment from the 1980s subdivision has almost certainly broken down by now, and a knockdown removes the structure it was protecting in any case. The certifier requires a new termite management system built to the current AS 3660.1 standard before the Occupation Certificate can be granted on the rebuild.
Reach out once your builder can put a rough date on the pour. Everything needs to be in place, collars included, between the plumbing rough-in and the concreter's arrival, so that gap is what we schedule against. Let us know if the block backs onto one of the local reserves so we can plan the perimeter accordingly.
It can. Pergolas, garden edging and fences built from timber that sit hard against the walls give termites material to work with and can hide activity from view. We recommend clearing that kind of timber away from the new barrier line, and we can advise on maintaining the clearance once landscaping goes back in.
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 Blacktown & Mount Druitt.
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.
