We give flood hazard advice to people across the Wellington Region. Our team can help you identify potential flood hazard on your property, and provide advice on appropriate development in flood hazard areas.
We also provide flood hazard information for the rivers and streams we maintain. Local councils also hold flood hazard information. Wellington Water holds stormwater flooding models for areas of Porirua, Wellington, South Wairarapa and Upper and Lower Hutt.
Local district plan rules apply when buying, selling, or developing in a flood hazard area.
Flood hazard maps
We provide two types of flood hazard maps:
- Detailed flood hazard map: This map helps people understand if they live in an area that could be impacted by flooding. It’s also used to inform district planning.
- Regional flood hazard exposure map: This map was created to inform emergency management planning, strategic planning decisions, and for flood hazard advice where detailed mapping does not exist.
Want advice from our Flood Protection team?
For detailed advice fill out the form below and one of our Flood Protection engineers will respond to your request.
Local council flood hazard Information
Local councils also hold information specific to flood hazard. Wellington Water hold stormwater flooding models for Kapiti, Porirua, Wellington and Upper and Lower Hutt. Local district plan rules apply when buying, selling, or developing in a flood hazard area. Links to the appropriate sites are here:
More resources
Regional flood hazard assessment
We recently completed a regional assessment of flood risk to support policy development and emergency management planning.
Dial before you dig
If you are going to dig or excavate into the ground please contact Before U dig. This is to make sure your work doesn't become a problem for others.
Isolated works
If you live outside of a Greater Wellington managed scheme you can receive isolated work funding. This funding can be up to 30% of actual cost.
River works warning service
If you are planning works in or near a Greater Wellington waterway, we can keep you informed of flood alarms that could affect your site.
Flood model request
Greater Wellington hold flood models for many of the major waterways across the region. To request this information please fill in this form and email to Flood Protection via info@gw.govt.nz
Watercourses maintained by Greater Wellington
Responsibilities for watercourses in the Wellington Region are split between Regional and Local Authorities. For more information on roles and responsibilities follow this link.
Technical guidance
GW has prepared a number of technical guides to assist in those working in flood and erosion risk management. For more information on technical guidance follow this link.
Get in touch
- Phone:
- 0800496734
- Email:
- info@gw.govt.nz