The ZEDbook: Solutions for a Shrinking World
About this book
The ZEDbook: Solutions for a Shrinking World, authored by Bill Dunster, Craig Simmons, and Bobby Gilbert and published by Taylor & Francis in 2008, stands as a manifesto for zero-carbon urban development grounded in real-world construction experience rather than theoretical abstraction. The book's central reference point is BedZED — the Beddington Zero Energy Development — completed in 2002 in the London Borough of Sutton, which at the time represented the United Kingdom's largest carbon-neutral mixed-use community. Built on a former brownfield site, BedZED demonstrated that radical environmental ambition and human-scale liveability could be achieved simultaneously within the constraints of a commercially viable development.
Bill Dunster, the founding architect of ZEDfactory, conceived BedZED as a proof of concept for what he called ZED (Zero Fossil Energy Development) principles. The project comprised 82 homes in a variety of configurations — flats, maisonettes, and terraced townhouses — alongside approximately 2,500 square metres of workspace, community facilities, and a health centre. The deliberate mixing of residential and commercial uses was not incidental but central to the ZED philosophy: by placing homes next to workplaces, the development sought to reduce the need for daily commuting, thereby cutting transport-related emissions alongside those from building energy use.
The book is structured in three parts that guide readers from foundational principles through technical building physics to applied case studies. The first section introduces ZED living as a coherent lifestyle framework. Dunster and his co-authors argue that sustainable development need not mean deprivation; instead, it requires redesigning the flows of energy, water, materials, and waste that sustain everyday life.
Zero-carbon living, in their framing, is achieved through a layered strategy: first reducing demand through good design, then meeting residual needs from on-site renewable sources, and finally using any surplus to serve the wider community. Passive solar design is the primary energy strategy at BedZED. Buildings are oriented to face south, and living spaces are positioned to capture maximum winter sun through generously sized, south-facing triple-glazed windows.
The triple glazing — with low-emissivity coatings and insulating gas fills — minimises heat loss while admitting solar gains sufficient to reduce or eliminate the need for conventional space heating during most of the year. Super-insulated walls, roofs, and floors complete the thermal envelope, limiting heat flow to such a degree that BedZED homes require only a fraction of the energy consumed by standard UK housing of the same period. Wind cowls — the colourful, sail-like ventilation cowls that became the visual signature of BedZED — provide passive heat-recovery ventilation without mechanical fans, rotating to face into the wind and drawing fresh air across a heat exchanger that recaptures warmth from outgoing stale air.
Renewable energy generation at BedZED was designed to cover the community's residual electricity and heat demand. A combined heat and power (CHP) plant originally fuelled by wood chip biomass was intended to supply both electricity and low-temperature heat via a district heating network. Building-integrated photovoltaic panels, covering approximately 777 square metres of south-facing roof and facade area, were designed to generate roughly 20 percent of on-site power needs, with surplus feeding an electric vehicle charging network.
The broader energy strategy reflected Dunster's conviction that on-site generation must be treated as an integral element of building design, not an afterthought. Water conservation and materials sustainability receive equal attention in the ZEDbook. Rainwater harvesting, grey-water recycling, and water-efficient fittings were incorporated to reduce potable water demand by approximately half compared to the national average.
Building materials were selected based on embodied energy and transport distance, with a preference for reclaimed, recycled, or locally sourced components. Structural steel was reclaimed from demolished buildings, and the overall embodied carbon of the development was substantially lower than a comparable conventional build. Simmons and Gilbert contribute chapters addressing the ecological footprint methodology and carbon accounting frameworks used to verify BedZED's performance claims.
This analytical rigour distinguishes the ZEDbook from purely aspirational sustainability writing; the authors present quantified metrics, monitoring data from post-occupancy studies, and honest assessments of where targets were met and where implementation fell short — including the eventual failure of the biomass CHP plant, which proved difficult to maintain. The book's final sections extend the ZED model beyond a single British case study to explore how the principles could be adapted for different climates, densities, and cultural contexts worldwide, offering the ZEDbook as a practical design and policy toolkit for a world facing resource constraints and climate disruption.