Interserve, the international support services and construction group, said it was preferred bidder on a seven year residential and corporate property contract.
The contract with the East Thames Group charity could be worth up to £100m over the initial seven year term, Interserve said, and included a option to extend it to fifteen years.
The repairs and maintenance contract will cover 13,000 properties across East London and Essex.
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The contract covers repairs to residential housing and corporate buildings, estate services to the local areas, project works across the property portfolio, and building refurbishment between lettings.
Interserve will also provide a strategic asset management service, advising the charity on the most effective maintenance investments across its portfolio.
"This opportunity with East Thames Group broadens our residential maintenance portfolio," said Bruce Melizan, Executive Director at Interserve.
"[It] will allow us to support the charity in regenerating East London and Essex to create communities where people want to live."
