Gloucestershire duo Chris Taylor and Hamish Marshall have been offered new deals for next season.
Both contracts will depend on whether the club are given permission to develop their Nevil Road ground, with a decision due in September.
Chief executive Tom Richardson told the club website: "We very much want both Chris and Hamish to stay.
"But we have had to make their offers conditional on planning permission being granted."
Former New Zealand batsman Marshall, 32, first joined Gloucestershire in 2006 as their overseas player before making his full squad debut two years later.
Taylor has been with the club for 11 years and has notched over 14,000 runs in all forms of cricket.
In July, 34-year-old Taylor said that the financial restraints that came with rebuilding the ground could hamper any contract offers, and he told BBC Gloucestershire: "Until those things are sorted out I don't think any deals are being sorted out."
He was also linked with a move to local rivals Somerset, although Gloucestershire were quick to deny the rumours.
Richardson added: "If they choose to move away it will be disappointing. But, in that event, we would make efforts to replace them with players of similar ability and experience."