Bosses at Inspire Suffolk are urging people to cast a vote on the last day of a national competition to win £200,000 of funding.
The sports and education charity has plans to overhaul its Ipswich venue and make it more accessible, but is in need of funding.
Persimmon Homes launched its Healthy Communities scheme last May with the aim of giving £615,000 to support amateur youth sport in England, Scotland and Wales.
Thirty finalists nationally are now competing for the top prize with the winner to be announced at a gala dinner at York Racecourse on March 22.
One group will scoop £200,000, while two runners-up will win £50,000 each. Each of the remaining 27 finalists will win £5,000 each.
Voting will close in the competition at 11.59pm tonight.
Inspire Suffolk hopes to invest the money in revamping its sports dome in Lindbergh Road, which is used by numerous sports and community groups within the area.
The charity has plans to make the changing rooms accessible; install a lift to the first floor viewing gallery; build a dedicated referee changing room; create a secure reception and entrance area; install seating for the viewing gallery, remove all asbestos and install energy efficient heating and lighting systems.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here