Directional drilling & complete civil
Precision underground.
Sub-Zone Networks installs water, power, fibre and gas the clean way: directional drilling and complete civil, across Auckland. Twenty years under the surface, done right the first time.
20+
Years Drilling
450mm
Max Install
24/7
Response
Tier 1
Compliant
Our services
One accountable crew, bore to reinstatement
Directional drilling is at the core of what we do, backed by complete civil capability. Your project stays with one crew from the first bore to the final surface.
Directional Drilling (HDD)
Clean, precise installs up to 450mm, accurate bore alignment, minimal surface disruption.
Locating & Markout
Accurate detection of underground utilities with modern equipment for safe excavation.
Wastewater, Stormwater & Drainage
Specialist drilling to specified line and grade for drainage infrastructure.
Civil Works & Reinstatement
Excavation, trenching and high-quality reinstatement to all council requirements.
Mole Ploughing & Thrusting
Trenchless installs with very low surface impact, ideal for short runs.
Why Sub-Zone
What sets us apart
Backed by over 20 years of directional drilling experience and a crew with deep civil expertise, we deliver clean, precise installs, even in tight, high-risk environments.
A crew that moves like clockwork
Everyone knows their role and backs each other on site. We get stuck in, communicate clearly, and adapt quickly, no hand-holding.
Clean installs, first time
We are known for being easy to work with, responsive when it counts, and delivering high-quality installs the first time. We back our work, our people, and our partners.
Agile, and able to scale
Nimble for rapid-response tasks, with the capacity to scale up through trusted partners, one point of accountability for projects of any size.
Connected by quality. Driven by partnership.
Twenty years of directional drilling experience, a crew that backs each other, and one point of accountability, from the first bore to the final surface.
Recent work
Recent work
A snapshot of the projects our crew has delivered across Auckland.
Birkenhead Road Power Duct
Omexom · May 2025
Urgent mobilisation into a congested urban corridor. We redesigned the layline to eliminate strike risk and delivered controlled night works with high-quality reinstatement, including decorative cobble.
Hunua Road Watermain
RNJ Electrical for Veolia · June 2025
480m of 355mm watermain in a high-traffic commercial corridor, night works only to keep major stakeholders trading. In-house electrofusion welding bypassed subcontractor delays. Retained for Stage 2.
Core Works in Action
Various clients · Ongoing
High-volume daily installs across power, gas, fibre and water: transformer installs, gas connections and clean, compliant reinstatement across every surface type.
Safety & compliance
Grounded in community, dedicated to safety
We operate to Tier 1 contractor standards with a Sitewise Gold rating and an ISO-compliant HSE system, and as an Amotai Registered Business we support inclusive procurement across Aotearoa.
Send us your plans.
Upload your network design plans and our team will review them and get a quote back to you. Large-scale project or a rapid-response task, we are ready.