David Knight and Finn Williams have been investigating what they call “minor development” in the field of architecture and urban planning for several years now, and their discoveries are absolutely fascinating. Last year they published a book called SUB-PLAN: A Guide to Permitted Development, exploring the world of building extensions, temporary structures, outdoor spaces, and other minor acts of home construction that fly beneath the radar of official town planning.
“How far does planning control what we build? And what can we build without planning?” the authors ask. “SUB-PLAN explores the legal possibilities of building outside the limits of legislation.”