Greenfield

Greenfield is construction with a blank page: layout optimised rather than negotiated, systems designed whole rather than tied into, construction sequenced for efficiency rather than around live operations. Everything that makes brownfield work slow — surveys of what exists, shutdown windows, permits to work beside operating equipment — is simply absent.

What is also absent is everything else. A greenfield site brings no power, water, roads, drainage, communications, workforce or camp; the project builds its own world before it builds the facility, and the site-development and infrastructure scope — with the geotechnical and hydrological unknowns underneath it — is routinely the most underestimated part of the venture. Permits start from zero as well: land, environmental, utilities, construction, each on its own clock.

The characteristic failure is the clean-slate illusion: estimating the facility and discovering the site. The ground is never as assumed, the utilities are further than drawn, and the "undeveloped" land has owners, neighbours, ecology and archaeology. Greenfield removes the constraints of an existing plant and replaces them with the constraints of an existing planet.