Northern Beaches · AS 3660.1
Perimeter termite barriers installed to AS 3660.1 for Narrabeen rebuilds around the lagoon shore, on the narrow strip between Narrabeen Lagoon and the ocean beach.
Quick answer
Yes, a rebuild or new home in Narrabeen needs a termite management system, since the suburb sits in a termite-prone part of Northern Beaches Council with low-lying, lagoon-adjacent ground on much of its footprint. The system is installed to AS 3660.1, with collars and under-slab work completed before the pour, and the durable notice plus installation certificate supplied to your certifier before the Occupation Certificate.
Termite barriers in Narrabeen
Narrabeen is about 18 km north-east of the Sydney CBD, in postcode 2101 and the Northern Beaches Council area, defined by Narrabeen Lagoon, a large coastal lake fed by Deep Creek, Middle Creek, Mullet Creek and Narrabeen Creek, which drains a catchment that is still largely bushland. Houses and units line the lagoon shore and the narrow strip between the lagoon and the ocean beach, where storm damage and erosion have long been a concern, and the suburb is also home to the Sydney Academy of Sport and Recreation. Most of our work here is a knockdown rebuild on an established lagoon-side or beachside block.
Living near so much water shapes termite risk in Narrabeen as much as it shapes flooding and erosion concerns. Low-lying streets near the lagoon hold moisture in the soil after rain, conditions subterranean termites favour when foraging toward a slab, and older beach houses and holiday cottages often have timber floors and additions that need regular checks before any rebuild ties into them. Units along the main road and near the shopping centres sit on more typical suburban ground, but the bushland catchment feeding the lagoon still brings termite pressure closer to Narrabeen than to a suburb further from the water.
Reviewed by Ismail, founder · Northern Beaches coverage · Updated September 2026 · More Northern Beaches suburbs
Get my fixed quote
Local conditions
Three conditions push termite risk higher in Narrabeen than in beach suburbs without a large lagoon behind them.
Deep Creek, Middle Creek, Mullet Creek and Narrabeen Creek all feed Narrabeen Lagoon, and that much bushland catchment holds established termite colonies with a path toward low-lying streets nearby. Lagoon-side blocks usually need a full perimeter.
Streets close to the lagoon hold moisture in the soil for longer after rain than higher ground further inland, and subterranean termites are quick to use that dampness when foraging toward a slab. We detail those boundaries with extra care.
Older beach houses and holiday cottages in Narrabeen often have timber floors and additions that can already carry undetected termite activity. We check that history closely before recommending a system for any rebuild tied into the existing structure.
What we install here
We work on Narrabeen knockdown rebuilds and extensions on lagoon-side and beachside blocks, and unit renovations along the main road near the shopping centres. We install under-slab membrane, collars and a physical or chemical perimeter suited to low-lying, moisture-retaining ground, with particular attention to sub-floor ventilation on older beach houses. One fixed quote from your plans covers every stage. We check site conditions properly before locking in a firm quote. Our team handles staging so the barrier never holds up concrete.
Local knowledge
Our Narrabeen work sits close to Narrabeen Beach and the lagoon shore, where sandy, damp ground meets a large bushland catchment, and near Edgar Gornall Wildflower Garden, where plantings and leaf litter shelter pests close to several homes. Around Augusta Shopping Centre and Long Reef Golf Course, our work shifts toward unit renovations and blocks with more typical suburban ground.
Narrabeen is certified through Northern Beaches Council, which requires the standard termite documentation before it will issue the Occupation Certificate: an installation certificate spells out which areas are protected, what products went in and the installer's licence, while a durable notice sits inside the meter box. We supply both, along with maintenance advice suited to a lagoon-adjacent property. We factor all of that into the final price.
Narrabeen at a glance
| Suburb | Narrabeen, NSW 2101 |
|---|---|
| District | Northern Beaches |
| Distance from Sydney CBD | 18.0 km north-east |
| Certifying council | Northern Beaches 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
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.
Get a fixed quote
Narrabeen questions
Still unsure? Call and talk it through with a licensed technician.
+61 450 515 215Usually, yes. Low-lying, lagoon-adjacent soil holds moisture longer than higher ground, and subterranean termites favour that dampness, so we generally recommend a full physical perimeter rather than a minimal strip for blocks close to the lagoon or its creeks. We keep a copy of every certificate on file for later. That keeps the whole process simple for you and your builder.
Timber floors and additions on older beach houses can already carry undetected termite activity, so we inspect the existing structure closely during the quote. The rebuild still gets the standard collars, under-slab work and perimeter to AS 3660.1. It also keeps your certifier's paperwork straightforward and complete. Feel free to ask us anything else not covered here.
Yes. Any new residential building on termite-prone land needs a compliant system under the NCC, unit renovations included, though the scale and collar count differ from a single beachside house rebuild. We are glad to answer further questions once we are on site. This keeps everything properly documented for future reference too.
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 Northern Beaches.
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.
