The pair will now work with the council on bringing forward detailed proposals as part of a strategic alliance.
Plans will target new homes, improved public spaces, and mixed-use developments – including a potential public sector hub bringing health and community services into the town centre.
The move is a major step in Dover District Council’s long-term regeneration push to turn the port town into a vibrant destination rather than a place people just pass through.
Nadeem Aziz, chief executive of Dover District Council, said: “Dover has incredible potential, but it has not yet been fully realised.
“Meaningful regeneration takes time and needs collaboration between the public and private sectors.
“We are excited to be working with Willmott Dixon and Milligan to help us take the next steps towards a transformational masterplan, blending public and private sector investment to create a thriving town centre.”
The town has already seen progress with housing at Leyburne Road, the soon-to-open Maison Dieu restoration, and the ‘Bench’ creative hub due to complete next year.
Detailed site plans will follow in the coming months.