KB Contractors, of Mosgiel, has pledged $30,000 towards the proposed Taieri Aquatic Centre, taking the total amount raised so far to $927,000.
Director Kelvin Read said parting with the money was a easy decision for him and his fellow director Brent Reid, who both live on the Taieri.
"We've got a staff of somewhere near 45, which involves a lot of children, and we just want to see their future looked after."
The reason for going public with the donation was to encourage other businesses and individuals to give, he said.
"We don't want any special recognition but we do want to encourage others who can to contribute, to do so because this will further future-proof Mosgiel, which isn't a sleepy little town any more."
Mosgiel was growing at a rapid rate, so that an amenity such as the new aquatic centre was essential, Mr Read said.
The Dunedin City Council has set aside $6.4million in its draft 10-year plan to replace the old pool but the community must raise another $7.5million if wants its preferred design.
The council has been criticised for not funding more of the cost.
Taieri Community Facilities Trust chairwoman Irene Mosley said the trust was ready to state its case for more council funding during the 10-year plan hearings next week.
Of the $927,000 raised so far, most had come from private donations, Mrs Mosley said.
"To have raised this much money in nine months shows a commitment from the community and hopefully it makes the council look closely at the cost of the project and how much it is contributing to it."
