The May day demonstration comes one day before the annual general meeting of the contractor, when it will be singled out again, this time by Friends of the Earth.
A source at Mayday Monopoly, the organiser of the protests, said Balfour Beatty's offices in Victoria were on its hit list.
The source said: "There are different collectives around London that are targeting different companies and locations. Balfour Beatty is on the list and we actively encourage demonstrations against other kinds of construction companies." A spokesperson for Balfour Beatty said: "We are aware that we are on a list of targets for the May Day protests, and we will be taking all necessary precautions." But Balfour Beatty was tight-lipped about how it would respond to the protests. A spokesperson said: "We do not want to talk about May day as we do not want to reveal any of our movements for the day." Friends of the Earth will target Balfour Beatty's annual meeting on Wednesday to highlight the firm's role in the consortium intending to build the Ilisu dam in south-east Turkey.
We are aware that we will be a target and will be taking the necessary precautions
Balfour Beatty spokesperson
Last month Friends of the Earth bought £30,000 of the contractor's shares so that it could put forward a resolution challenging the ethics of the venture.
Matt Philips, a senior campaigner with Friends of the Earth, said: "We will be involved in a protests inside and outside the Balfour Beatty annual meeting.
"Friends of the Earth members who have bought shares in Balfour Beatty will be inside the AGM, and other members will be outside taking part in a visual protest, but we have not decided upon what it will be yet." Balfour Beatty has been widely criticised over its environmental practices and its alleged role in the Hatfield crash.