The ‘sharing economy’ has become a new buzzword in urban life as digital technology companies set up online platforms to link together people and un- or underutilised assets with those seeking to rent them for short periods of time. While cloaked under the rhetoric of ‘sharing’, the exchanges they foster are usually profit-driven. These economic activities are having profound impacts on urban environments as they disrupt traditional forms of hospitality, transport, service industry and housing. While critical debates have focused on the challenges that sharing economy activities bring to existing labour and economic practices, it is necessary to acknowledge that they also have increasingly significant impacts on planning policy and urban governance. Using the case of Airbnb in London, this article looks at how these sharing or platform economy companies are involved in encouraging governments to change existing regulations, in this case by deregulating short-term letting. This has important implications for planning enforcement. We examine how the challenges around obtaining data to enforce new regulations are being addressed by local councils who struggle to balance corporate interests with public good. Finally, we address proposals for using algorithms and big data as means of urban governance and argue that the schism between regulation and enforcement is opening up new digitally mediated spaces of informal practices in cities. 数字技术公司建立了在线平台，将人员和未利用或未充分利用的资产与希望短期出租的业主联系起来。在这一方式下， “共享经济” 己经成为城市生活中的新口号。但是，虽然有 “共享” 的修辞，这些方式培养的交流通常是由利润驱动的。这些经济活动破坏了传统的酒店、交通、服务业和住房形式，对城市环境产生了深远的影响。虽然关键的辩论集中在共享经济活动给现有劳动和经济实践带来的挑战上，但有必要承认它们对规划政策和城市治理也有越来越大的影响。本文以 Airbnb 在伦敦的运行情况为案例，探讨这些共享或平台经济公司如何参与鼓励政府改变现有的法规，在伦敦的具体案例中是放松对短租的限制。这对规划的执行具有重要意义。我们研宄了地方议会如何通过努力平衡公司利益和公共利益来克服获得数据以执行新法规的挑战。最后，我们提出使用算法和大数据作为城市治理手段的建议，认为监管与执法之间的分裂正在开辟城市非正式实践的新型数字媒介空间。