How is the development value modelled for a Net Zero Carbon Building such as this?

I would interested to understand the commercial development value model for a building such as this.

> Does it require a longer term approach to return on investment to be attractive to funders ?
> Presumably the modelling of lifecycle costs, longer lifespans, improved quality etc play a major part, and
> To what extent might it be reliant on assumptions relating to future grants, subsidies, tax breaks etc?