The concept of 1.5-degree lifestyles involves changesin household consumption for achieving levels of perperson carbon footprint compatible with the 1.5°C targetof the Paris Agreement (IPCC, 2018). This requires,on average, emitting the equivalent of 2.5 tons of CO₂ per person per year by 2030, and 0.7 tons of CO₂ perperson per year by 2050 (Akenji et al., 2021), which impliessubstantial emission reductions, especially in industrialcountries. Besides how we consume, lifestyles are also howwe relate to one another, what kind of neighbours,friends, citizens and parents we are, what kinds ofvalues we nurture, and how we let those values drive our choices. Cities present the context and infrastructures that shape lifestyles and provide citizens with options forfood, housing, transport, and leisure. By 2030, citieswill host over 60% of the global population (UN, 2019). Local governments and cities thus play a fundamentalrole in leveraging the transition to sustainable lifestyles. The project ‘Envisioning Future Low-Carbon Lifestyles and Transitioning Instruments,’ funded under the UnitedNations One Planet Network, was launched to explorethe 1.5-degree lifestyles concept at the city level. The project is led by IGES in collaboration with Hot or CoolInstitute, D-mat, ICLEI Japan, the National Institute forEnvironmental Studies, Japan (NIES) and the local partners:Akatu Institute (Brazil); Swechha (India); ICLEI Africa(South Africa); and Chulalongkorn University (Thailand). The project aims at co-developing low-carbonlifestyle pathways through engaging citizens in workshops,household experiments, and scenario-buildingin six cities around the world (Cape Town, South Africa;Kyoto and Yokohama, Japan; New Delhi, India; Nonthaburi,Thailand; and São Paulo, Brazil). This brief shares findings from the project implementationin the six cities involved, including policyrecommendations for enabling 1.5-degree lifestyles.