The move will see another 45 staff join LDD who will now offer one of the largest specialist strip out teams in London.
The expanded division is now targeting a turnover of £10m.
Prostrip Demolition Services is headed by managing director Colin Slade.
LDD Chairman Ziggy Seagroatt said: “Our biggest strength at LDD is our people and we know that the Colin and the team at Prostrip will fit straight in, creating one of the largest specialist strip out teams in London.
“I have known Colin personally for over 15 years, and what he will bring to LDD is a wealth of experience in this specific sector, bolstering our current strip out capabilities and bringing new opportunities for collaboration between the businesses.
“Colin has extensive strategic experience in waste management and compliance, a key aspect of delivering a modern, responsible and forward-thinking strip out service.
“This is an exciting time for the business.”