Blacktown & Mount Druitt · AS 3660.1
Seven Hills' established homes with mature gardens sit between Grantham Heritage Park and Toongabbie Creek, postcode 2147, and every knockdown rebuild here needs a barrier closed off before the pour.
Quick answer
Yes, a new home or knockdown rebuild in Seven Hills needs a termite management system under the NCC, since the suburb sits in a termite-prone part of Sydney. The system is installed to AS 3660.1 before the concrete pour, with collars fitted at every penetration. A durable notice for the meter box and an installation certificate for the certifier are both required before the Occupation Certificate.
Termite barriers in Seven Hills
Seven Hills sits about 27.5 km west of the CBD in postcode 2147, with most of the suburb in the City of Blacktown and a small eastern strip along Toongabbie Creek in the City of Parramatta. Land grants here date back to the 1790s, and a station platform opened in 1869, with Grantham Heritage Park now preserving part of the old Grantham Poultry Farm that later became a soldier settlement after World War I. Housing schemes between 1959 and the 1970s carved Lalor Park and Kings Langley out of the original area, and today the suburb is a mix of established homes, industrial land and the Seven Hills Plaza precinct near the station, with knockdown rebuilds on the older residential streets making up most of our work.
Established homes with mature gardens attract termites in Seven Hills, and Toongabbie Creek adds extra moisture on the eastern side of the suburb, which is exactly the ground subterranean termites forage through looking for timber. Homes towards the creek get extra attention for termites and drainage as a result, and a rebuild there needs its barrier detailed around that dampness rather than treated the same as a block well away from the water. Decades of established garden growth around the suburb's older houses adds another layer, since mature plantings hard against brickwork can already be hiding a termite route into the frame.
Reviewed by Ismail, founder · Blacktown & Mount Druitt coverage · Updated September 2026 · More Blacktown & Mount Druitt suburbs
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Local conditions
Three local factors shape how we detail a barrier in Seven Hills.
Toongabbie Creek runs along the suburb's eastern edge, and homes towards it get extra attention for termites and drainage because the ground there stays damper than blocks further from the water. That moisture is exactly what subterranean termites forage through.
Seven Hills's older homes with mature gardens attract termites, and decades of plantings hard against original brickwork can hide a route into the frame that has nothing to do with a new slab. We check garden conditions before finalising a barrier design.
Industrial sites and the area around Seven Hills Plaza and the station have brought more construction activity into the suburb's centre, which can disturb ground on nearby residential blocks undergoing their own rebuild at the same time.
What we install here
Our Seven Hills work is mostly knockdown rebuilds and extensions of the suburb's established homes, with some unit and light-industrial slabs closer to the station and Seven Hills Plaza. Waffle pod slabs suit the flat, open ground here. We fit collars to every pipe and conduit penetration and run the perimeter to the true boundary, with homes towards Toongabbie Creek getting particular attention to soil moisture and drainage. We work to your builder's program throughout, timing our visit around the plumbing rough-in and pour.
Local knowledge
Seven Hills Plaza and Seven Hills station sit close to much of our work in the suburb's centre, a reminder of how built-up this precinct has become since the original station platform opened in 1869. Grantham Heritage Park adds mature trees and leaf litter nearby, ground cover that shelters termites and possums close to residential streets. Landen Stadium, a little further out, keeps a stretch of turf irrigated, and homes closest to Toongabbie Creek get the most careful attention of all, given how much moisture that corridor brings to the eastern side of the suburb.
Most of Seven Hills is certified through the City of Blacktown, with the small eastern strip along Toongabbie Creek falling under the City of Parramatta. Either certifier needs the same evidence before an Occupation Certificate follows: a meter-box notice confirming the system, and an installation certificate covering the products, the treated areas and the installer's licence. We have both ready as soon as our stage of the build is complete.
Seven Hills at a glance
| Suburb | Seven Hills, NSW 2147 |
|---|---|
| District | Blacktown & Mount Druitt |
| Distance from Sydney CBD | 27.5 km 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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Real, verified reviews from homeowners and businesses we've worked with.
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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Seven Hills questions
Still unsure? Call and talk it through with a licensed technician.
+61 450 515 215Yes. Homes towards Toongabbie Creek get extra attention for termites and drainage, because the ground on that side of Seven Hills stays damper than blocks further from the water. We still install a compliant AS 3660.1 system on every job, but run a fuller perimeter and check drainage more closely on creek-side blocks.
Most of the suburb is certified through the City of Blacktown, with a small eastern strip along Toongabbie Creek falling under the City of Parramatta. Both want the same meter-box notice and installation certificate naming the products, the treated areas and the licensed installer before an Occupation Certificate follows, whichever applies to your block.
They can. Seven Hills's older homes with mature gardens attract termites, and decades of plantings built up against original brickwork can already be hiding a route into the frame. We check what's established on the block before recommending a system, and point out any garden material that needs to be cleared from the new barrier line.
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.
