TRANSPORT

Petone to Grenada Link Road (Wellington RoNS)

NZ Transport Agency Waka Kotahi · Wellington

A proposed 6km four-lane Road of National Significance from SH2 north of Petone to SH1 north of Grenada, with tunnels under Woodridge Drive and Mark Avenue. NZTA's board approved the tunnelled alignment and route-protection funding in October 2025. It would affect about 85 houses. Last formally costed at $1.8b in 2018 and being re-estimated.

Weak signals: elevated risk Data: High

Delivery Confidence Score, 0 to 100, higher is better: a ranking of how strong this project's delivery signals are, not a probability. It blends eight factors, including the election risk and policy alignment shown below.

Breakdown▾

Data current as at 16 Sept 2026, when the pipeline was last checked against its source.

Key facts

Region: Wellington
Sector: Transport
Status: Planning
Estimated value: $1.8b
Indicative completion: 2035
Funding status: No Source
Lead organisation: NZ Transport Agency Waka Kotahi
Election risk: Extreme

Election risk assessment

A revived Wellington Road of National Significance still at the route-protection / consenting stage with no construction funding committed. A National-government priority that Labour and the Greens would likely deprioritise, and the route is contested locally over property takings in the northern suburbs.

Government priority alignment

HIGH: Roads of National Significance four-laning, a core government economic-growth and resilience priority.

Recent changes

2026-W37Major New project added: Petone to Grenada Link Road (Wellington RoNS) (Planning, $1.8b).

Chronology

2017Original Petone to Grenada link road shelved; NZTA shifts to SH58 and Petone-Melling safety improvements
2024Revived in the GPS 2024 Roads of National Significance programme
2025NZTA Board approves the preferred (tunnelled) route and funding to seek route protection
2026Ground / environmental investigations and community sessions (Newlands, Petone); substantive consent application expected late 2026
2026NZTA's July Major Transport Projects Pipeline confirms the project remains in the slow lane with no construction timeframe, continuing route-protection preparation only
2035expectedIndicative completion: construction not yet funded

Source

NZTA: Petone to Grenada ↗

View Petone to Grenada Link Road (Wellington RoNS) on the live map →