Civil Construction Services

Sage Civil delivers complete civil infrastructure packages across road, drainage and subdivision projects throughout the Greater Darwin region. Our capability extends to rural and urban road construction and maintenance, pavement stabilisation and bulk earthworks, delivered in live traffic and operational environments with disciplined sequencing and environmental controls. 

  • We deliver construction and rehabilitation of sealed and unsealed roads across rural and urban areas. Experience includes subdivision roadworks, access roads, internal roads for public facilities and intersection upgrades under live traffic. Works are staged to maintain access, manage safety and ensure pavement performance in Territory conditions. 

    • Sealed and unsealed road construction 

    • Road reconstruction and rehabilitation 

    • Pavement construction and stabilisation 

    • Subgrade preparation and compaction 

    • Shoulder construction and reformation 

    • Intersection tie-ins under live traffic 

    • Sealing and line marking coordination 

  • We deliver bulk earthworks packages for infrastructure and development projects, including detailed trimming and formation works to specification. Our in-house plant fleet supports efficient cut-to-fill operations, compaction control and material handling across multiple concurrent work fronts. 

    • Clearing and grubbing 

    • Bulk earthworks and cut-to-fill operations 

    • Building pads and hardstands 

    • Compaction and subgrade replacement 

    • Stockpile and material management 

  • We construct integrated drainage systems essential to long-term road and subdivision performance. Our works include reinforced concrete box culverts, stormwater pipes and pits, floodways and open drainage systems. Drainage sequencing and environmental controls are planned to maintain site stability during wet season conditions. 

    • Reinforced concrete box culverts (RCBC) installation 

    • Stormwater pipes and pits 

    • Floodways and table drains 

    • Erosion and scour protection works 

    • Environmental control implementation 

  • Our capability extends to specialised pavement construction and rehabilitation works requiring controlled compaction, material compliance and specification-driven delivery. These works demand precision, quality assurance and disciplined site management. 

    • Aerodrome pavement works 

    • Heavy-duty pavement applications 

    • Controlled compaction and testing 

    • Specification-driven construction 

  • We deliver full civil packages for subdivisions and public infrastructure, including works in operational sites such as schools and emergency services. Our approach integrates traffic management, staging and coordination to minimise disruption while maintaining safety and compliance. 

    • Internal subdivision roads 

    • Carparks and access roads 

    • “Kiss and Go” facilities 

    • Kerbing and concrete works 

    • Traffic management implementation 

Plant & Equipment

Sage Civil operates a substantial in-house fleet of civil plant and equipment that supports flexible programming, rapid mobilisation and the ability to manage multiple concurrent work fronts.

Our fleet capability enables controlled delivery of bulk earthworks, pavement construction and drainage works without reliance on external hire markets, strengthening certainty across program and cost. 

Plant resources are supported by experienced operators and maintained to ensure reliability across demanding Territory conditions. 

    • Graders and dozers 

    • Excavators from 3T to 30T 

    • Loaders with Loadrite systems 

    • Smooth drum, multi-tyred and padfoot rollers 

    • Water carts and haulage trucks 

    • Prime movers and side tippers 

    • Crusher, screening plant and pugmill 

    • Survey equipment including Total Station systems 

Shoal Bay Quarry

In addition to our Pinelands headquarters, we operate an extractive quarry at Shoal Bay in Darwin’s rural area. The Shoal Bay quarry provides direct access to essential construction materials, strengthening our ability to deliver civil works with reliability and cost certainty. 

Our quarry operations are supported by in-house crushing and screening capability, enabling materials to be processed to project specifications and reducing reliance on external suppliers. 

    • Type II road base 

    • Select fill 

    • General fill 

    • Sand products suitable for pavement and drainage applications 

    • Darwin 

    • Palmerston 

    • Litchfield Municipality