Civil & Stormwater Engineers Tallawong

Tallawong barely existed as an address five years ago. The suburb was gazetted in November 2020, cut from parts of Schofields and Rouse Hill and named after the metro station that opened at its heart in May 2019 as the terminus of the Metro Northwest line — the name itself is a Dharug word for the apple gum. Today Tallawong is where the North West Growth Area meets transit-oriented development: townhouse rows, apartment sites and small-lot housing pressing in around the station precinct. Contrive Consultants is based in neighbouring Rouse Hill, literally minutes from Tallawong Station, making this the closest thing we have to a home-ground suburb.

Building in Tallawong

Development here clusters in rings around the metro. Closest to the station, Landcom-coordinated precinct sites and private developers are delivering apartments and terraces, with Tallawong Village adding local retail. Further out, along Tallawong Road and the streets running toward Schofields, the pattern shifts to medium-density infill — dual occupancies, manor houses and townhouse projects on land that was semi-rural within living memory. A new public school has been part of the state’s school-building program for the corridor, underlining how quickly the population is arriving.

From an engineering standpoint, Tallawong’s density is the defining factor. Multi-dwelling and apartment projects concentrate large impervious areas onto compact sites, which makes stormwater detention, basement drainage and driveway geometry harder problems than on a conventional house block. Runoff from the locality drains toward the Ponds creek system that carries water north through the growth area, so Blacktown City Council applies its full water-quality regime to new work here.

What Builders and Developers Need in Tallawong

Blacktown Development Control Plan 2015 and the council’s WSUD framework govern stormwater across the suburb. On a typical Tallawong project the engineering package must cover:

On-site detention (OSD) — required on most new development, and on dense sites the detention volume often ends up below ground or under the driveway. We design tanks, orifice controls and discharge arrangements to Blacktown’s methodology, using the deemed-to-comply route where it saves you money.
Water quality (WSUD) compliance — demonstrated pollutant load reductions before discharge, documented per council’s WSUD handbook. On multi-dwelling sites this usually means a treatment train: rainwater tanks plus a proprietary or vegetated treatment measure.
Basement and low-point drainage — apartment and undercroft projects near the station need pump-out systems, tanking strategy and overland flow protection for entries and ramps.
Detailed drainage plans with lawful point of discharge, hydraulic grade line checks and inter-allotment easements where rear lots cannot reach the street by gravity.
Erosion and sediment control plans, plus construction and operational waste management plans — the latter a frequent RFI trigger on townhouse DAs where bin storage and collection geometry are tight.

Every new dwelling also needs BASIX before lodgement, and townhouse and subdivision projects need NBN pit and pipe designed, built and certified before occupation or plan registration.

Our Services in Tallawong

Stormwater, OSD and WSUD design for houses, duplexes, terraces, manor houses and apartments
Civil design for small subdivisions and community title schemes
Basement drainage and pump-out system design for station-precinct projects
Driveway longitudinal sections and vehicle access design to council standards
Erosion and sediment control plans and waste management plans
NBN pit and pipe design and certification through Pit and Pipe
BASIX and NatHERS certification through NathersPRO — including multi-unit thermal assessments
Detail, boundary and strata surveys through our partner surveying company
Architecture, landscape architecture and marketing-grade 3D renders through ARQI
Planning proposals, SEEs and DA strategy through URBA
Swept path analysis through Sweptpaths for garbage trucks, service vehicles and tight basement ramps — a standard council request on Tallawong townhouse sites

Tallawong Development FAQ

Do townhouse projects near Tallawong Station need swept path analysis?

Almost always. Blacktown assessors routinely ask for turning path plots showing garbage collection and service vehicles can enter, manoeuvre and leave in a forward direction. Our Sweptpaths team produces these alongside the civil drawings so the driveway geometry and the drainage design agree with each other from the first issue.

Can OSD go under the common driveway on a multi-dwelling site?

Yes, and on compact Tallawong lots it is often the only workable location. We design trafficable below-ground tanks with appropriate access grates and maintenance provisions, and coordinate structural requirements so the detention system doesn’t clash with services or the NBN conduit run.

We’re at concept stage — when should the civil engineer get involved?

Before the architecture is locked. Ten minutes with the survey tells us where water must go, how much detention you’ll need and whether an easement is unavoidable. Designing the building around that reality is far cheaper than redesigning it after a council RFI.

Engineers Around the Corner

Building new in Tallawong? Alongside the engineering we’re often asked to recommend a builder — 13 Homes builds throughout this corridor and works hand-in-hand with our design team.

We pass through Tallawong most weeks and can usually meet on site at short notice. Call +61 497 848 111, email info@contriveconsultants.com.au, explore our services or lodge your plans via the contact page for a same-week fee proposal.

Planning a new build in Tallawong? For new homes, duplexes and knock-down rebuilds we’re happy to recommend 13 Homes, a Sydney home builder we regularly work alongside on local projects.