Improving margins in three of its key areas, property services, construction and partnership housing are expected to boost company earnings, and the market for office fit-outs has continued to fare well.
The company boasted £7.3bn in secured work as of 30 September, up 10% since the year end, including a £4.1bn secured order book and a pipeline of regeneration and developments worth £3.2bn.
Chief executive John Morgan said: "We now expect to deliver a full year performance slightly above the board's previous expectations".
He said the upgrade was down to “positive momentum across the group's operations” and a strong balance sheet which enables the company to sustain growth.
Also, the average daily net cash for the full year is expected to be in excess of £100mln, ahead of previous guidance.
Broker Liberum called a 'Buy' rating on the firm, forecasting its average daily net cash to jump to £103m ahead of a strong performance expected in the second half of the year, but leaving its long-term figures unchanged due to macro uncertainty.
Shares climbed 2.2% to 1,328.4p on Wednesday morning.