Faced with acute housing crises, some governments are inclined to strip away the ‘bureaucracy’ of planning, relaxing rules on the scrutiny of planning applications and seeking to accelerate the building of new homes. The planning that remains becomes a ‘client service’ for the development industry – a system of housing licensing that follows on from a basic consideration of legal compliance. Such a system has been introduced in England, rooted in the extension of permitted development rights (PDR) for office-to-residential conversions. This article examines the determinants of housing quality through the conversion process, comparing the deregulated approach to conversion in England with Italy’s regulated approach, set within its zonal planning system. The conclusion drawn, after the examination of case studies, is that good quality housing cannot be delivered from the conversion of buildings without either the retention of strong case-by-case planning control or a much more detailed prescriptive approach to housing standards, which would have halted the majority of recent office-to-residential conversions in England.

Recent decades have seen the emergence of hybrid models of living and working associated typologies. These developments have been analysed from the perspective of different disciplines, each with their own interpretation of this phenomenon. Planning and architecture have addressed hybridization as a specific form of interaction between spatio-functional features (such as mixed use, multi-functionality and flexibility) and social features (such as formal and informal interactions and the spontaneous appropriation of spaces) or have sometimes simply focused on the spatio-functional dimension in urban spaces. Studies from other disciplines (e.g. mobility networks, transportation, sociology and information technology) have shown that hybrid spaces cannot exist without access to digitalization technologies. Such technologies are accelerating hybridization processes. This study examines the complex and layered phenomenon of hybridization as a possible combination of (or interaction between) spatio-functional, social and digital features within the planning debate and related fields. Most of the case studies explored by scholars so far have focused on interactions occurring between residential, social and recreational functions, but working functions are playing an increasingly important role. Furthermore, the COVID-19 pandemic has accelerated the development of new forms of hybridity in cities. As a consequence, the rising use of hybrid (on-site and on-line) working practices, planners, policy makers and stakeholders, as well as scholars, have increasingly discussed the concept of hybridization. In this context, various hybrid typologies of urban spaces have materialized in forms such as new working spaces (NWS) which include co-working spaces, incubators, as well as some cafés and multi-functional public libraries, which have recently provided working spaces. This paper focuses on the evolving concept of hybridity from the planning perspective. Based on five hybrid NWS including their surrounding neighbourhoods in Oslo, it provides empirical evidence for an understanding of the phenomenon that may support the development of hybrid spaces and buildings and develops suggestions for planning strategies.