Sophie Thomas-Lacroix is an Associate and Architect at JTP’s London studio, with extensive experience leading complex, large-scale mixed-use regeneration projects across the UK. Across all her work, she brings a consistent commitment to creating beautiful, healthy and inclusive places to live, shaped through meaningful collaboration with the communities who will inhabit and sustain them.
Since joining JTP in 2017, Sophie has developed specialist expertise in estate regeneration, town centres and challenging brownfield sites, including projects involving multiple High-Risk Buildings. Committed to social mobility, she is particularly focused on delivering high-quality, affordable homes and inclusive regeneration, and is currently leading several major planning applications nationwide.
Sophie is currently leading the large town centre and estate regeneration of Chrisp Street Market in Poplar, East London – a complex multi-tenure, mixed-use scheme that will breathe new life into this crucial district centre at the heart of London’s historic East End. At its heart is JTP’s bespoke engagement programme, JTP Engages, through which Sophie has overseen engagement with thousands of residents, traders and community groups, embedding their feedback directly into the emerging masterplan and ensuring local voices shape both the vision and its delivery. JTP’s process and engagement has helped create a shared sense of ownership rooted in lived experience and local pride, and was named a finalist in the 2026 Pineapple Awards and Planning Awards in the Stakeholder Engagement category.
Elsewhere, Sophie has played a key role in a wide range of high and low-density projects in both urban and rural settings. Her portfolio includes exemplar affordable housing and community-led regeneration schemes, from the multi-award-winning Blackbird Leys estate regeneration in Oxford and the PBSA and affordable housing regeneration of Devonshire Place in Southwark, to lower-density countryside neighbourhoods such as Knowle Park in Surrey and Channels in Chelmsford.
As Lead Project Architect for Blackbird Leys, she oversaw the delivery of 294 affordable, low-energy homes, a new community centre, retail spaces, a public square and major public realm improvements. Developed through continuous community engagement, the project placed local people at the heart of the design process. In 2024, it received three Planning Awards, including Best Housing Scheme (Under 500 Homes) and the Award for Community-Led Placemaking.
Sophie was also the Lead Project Architect for the Great North Leisure Park regeneration in Finchley, leading the design and planning application for the transformation of a car-dominated brownfield site into a sustainable mixed-use neighbourhood. The project is set to provide 1,502 homes alongside a new leisure centre, retail spaces, extensive public realm, over 300 new trees and two hectares of green space. With a strong focus on health and wellbeing, the site achieves a 157% biodiversity net gain and is Air Quality Positive, helping to reconnect a fragmented part of Finchley into a thriving, well-connected community.
Alongside projects, Sophie plays an active role in contributing to JTP’s wider culture and practice. She is closely involved in JTP Engages, helping to develop inclusive and effective community engagement processes; leads JTP’s Health and Wellbeing Group, embedding health-focused objectives across projects; and is an active member of JTP’s AI Working Group.
A member of Women in Property and sits on the Board of the Young Architects and Developers Alliance, Sophie promote stronger collaboration between young architects and developers. In 2023, she was named one of Property Week’s RESi Trailblazers, recognising emerging leaders in the UK property industry.
