Auckland's Climate Action Plan

Green Rooftops

Nitin Prasad
Nitin Prasad | Aug 1, 2018 | in Open Ideas

Imagine if all the available rooftop space in NZ is either semi or fully converted into green spaces! - It would totally reduce surrounding temperatures, increase biodiversity and create new green spaces!

This idea is around increasing the awareness of using existing rooftop spaces (For flats, office buildings, shop owners & homes where possible) to create new green spaces whether it's one plant, a raised vege patch or if it's converting an entire rooftop into a garden like the NZI building in Auckland CBD!.

It could just be an awareness programme on the benefits of converting part of full rooftop space into green areas. There could be an opportunity for garden centers, plant nurseries to get involved provide discounts etc.

This could be individuals or companies signing up and participating to an awareness programme on green rooftops with tips, discounts and suggestions on how to create green spaces.

It could be further expanded to bring in plant nurseries, garden centers and companies to create competition on the best green rooftop space or the most bio diverse rooftop etc.

Cost vs Benefit analysis:

For this idea to work, the plants and material should either be discounted or there must be some incentive like a reduction in rates if owners keep a minimum of X plants for a minimum of 6 months or something. Thoughts?

Benefits of Green Rooftops:

  • Reduces the ambient temperature in the surrounding area
  • Reduce pollution levels 
  • Increases biodiversity and ecological benefits
  • Reduces noice
  • Protects the roof 
  • And more

The idea of green rooftops have been around for a while now. It's caught on in other countries and I'm sure there's a way to make it happen here while keeping it optional, low cost and one that helps with the climate action plan.

I'm sure there is a simple way to encourage better use of existing rooftop spaces while creating a win-win situation for all involved. 

Green roof on NZI Building - Auckland CBD

edited on 2nd August 2018, 08:08 by Nitin Prasad

Nitin Prasad Aug 2, 2018

Would owners with a roof garden get a rebate in rates after a certain time frame? Would that be the incentive that gets more plants and greenery on the roof?


Create like social public spaces on rooftops with bars to involve the community? What would work?

Reply 0

Climate Primate 6 months ago

Totally agree green roofs are critical, in creating living space, social space, absorbent space, growing space for food, touch points for humans and climates in a concrete rich urban setting, learning about the potential of urban spaces, what NZ natives - flora and fauna - will thrive... so much space up there, so much potential...

Totally agree there could and should be subsidies involved here, and developers could be seriously encouraged to deliver this. This would grow the IP around, make it cheaper and easier, develop NZ focused solutions while also potentially seeding a new NZ innovation sector...

Food supply is one of the biggest indirect climate change issues we face. Communalising and localising food supply as a supplement to transported goods must be a high priority. School grounds must be utilised, curbs and berms, suitable walls both public and private, and of course rooves...

Reply 0

bernard simmonds 5 months ago

It would be useful to know the difference between the reduction in emissions from A) a good, rooftop garden vs. B) rooftop solar panels.

Reply 0

Andrew Dyson 3 months ago

Are you sure adding extra weight to old buildings that were not designed for it, in a geothermic ally active area is such a great idea?

Reply 0