Published17 July 2025Updated5 October 2026
Why Derby's new Assembly Rooms masterplan validates the mixed-use approach JSA has advocated since 2015.
Our original masterplan came from understanding how Derby ticks as a city. The Assembly Rooms site sits bang in the middle of where people naturally want to go—between the shops and the river, between the cathedral quarter and the town centre.
We designed around three simple ideas: mix everything up to create life throughout the day, keep things human-scale so new buildings respect Derby's existing streets, and make sure everything does something useful at street level.
Single-use buildings created most of our current city centre headaches. Shopping centres that turn into ghost towns after 6pm. Office blocks that provide zero weekend life. Cultural venues that need constant council cash to survive.
Mixed-use is trickier to plan—you need to understand retail markets and residential demand and office requirements all at once. But it creates the kind of urban buzz that single-use projects never manage. Different activities prop each other up financially and socially.
Derby's 2025 proposals suggest the city finally gets what its most important development site needs. After ten years of consultations and eye-watering consultant fees, the emerging masterplan shows proper mixed-use thinking that could inspire other cities facing similar challenges.
As British cities keep adapting to Amazon deliveries and working-from-home habits, Derby's Assembly Rooms could show how thoughtful mixed-use development creates resilient city centres. Places where you can live above the shop, work around the corner from home, and bump into people you want to see.
Sometimes good ideas take a while to become obvious to everyone else. We’re chuffed that Derby’s decision-makers have reached the same conclusions we mapped out years ago—and proud that our 2020 feasibility study helped move the dial. Now let’s get on with building it.
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