The £100m contract win means Balfour Beatty’s utilities arm has won £900m of work in six months.

Balfour Beatty Utilities has extended its existing water distribution agreement with South West Water for another five years.

The existing contract for Integrated Water Distribution Services is for seven years and the five-year extension is likely to be worth £100m.

The five-year agreement covers South West Water's clean water infrastructure programme. Work will include rehabilitation, minor capital works, leakage services, metering, reinstatement and repairs and maintenance, and will be worth some £20 million per annum.

Balfour Beatty chief executive Ian Tyler said: “This contract extension is the latest in a series of successes for Balfour Beatty Utilities following regulatory reviews in the gas and water industries.”

The operating areas for the project include Exeter, Newton Abbot, Torbay and North Devon.

In the last six months, Balfour Beatty Utilities said it has won over £900 million of work in new contracts for National Grid Transco, United Utilities, Anglian Water and Severn Trent Water and through the extension of their contracts for South West Water and Yorkshire Water.