The project involves retrofitting the post-industrial waterfront landscape into an inhabitable energy reserve to address the stark global austerity, social loneliness, and fuel poverty affecting London. The Greenwich Peninsula delineates the current urban regeneration practice where homes are isolated sanctuaries, and the river ecology is staged as an acquiescent appreciation. Reidentifying the emotive significance of the vanishing coal gas field as a third landscape, the riverside rewilding proposal embodies a marsh blanket embracing humans, non-human organisms, and energy, creating a symbiotic community mediated by the tidal Thames. The scheme incorporates retrofitting industrial infrastructure integrated with an anaerobic digesting system and a water-source heat pump (WSHP) chain, promoting responsibly sustainable living. The technological transformation of waterfront living to remediate the contaminated waterfront ecology constructs an ecological metropolis and a novel sustainable Thames ritual that can alleviate social loneliness and energy inaccessibility.