Trees which were due to be felled as part of Salisbury's £15m council office development are to be saved after the scheme was revised.
The scheme was delayed briefly by protesters opposed to tree-felling
Work, which began in February, was delayed briefly by a group protesting against the trees being axed.
It was then halted in May by the new Lib Dem and Labour administration so a review could be carried out.
The council has agreed a revised plan with the main contractor which reduces the size of a proposed extension.
The extension is to be built on the back of an existing Grade II listed council building.
But it will no longer encroach on an area known locally as the Secret Garden, avoiding the felling of several trees.
Other modifications relate to payments to the main contractor, Morgan Ashurst, and to sub-contractors.
Work on the revised scheme will be deferred until fresh planning and listed building consent have been obtained.
Council leader Paul Sample said: "At the moment, this is a draft agreement that has to be confirmed by a formal variation to the existing contract.
However, I am pleased that we have been able to devise a package that protects the immediate environment around Bourne Hill and meets the concerns expressed by many local people."
The new Lib-Dem and Labour administration said the controversial project had been a major issue at the local elections in May.
The former ruling Conservatives said the scheme was being funded without borrowing or raising council tax and would cut the council's operating costs by more than £600,000 a year.