The renovation became possible after George Akhtar, owner of Kettering Town Football Club, helped secure a 17-year lease and offered help and support.
Posters for Sunday’s ceremony, at 13:00 GMT, said it featured “special guest Sean Dyche”.
“He really selfishly got the Nottingham job, so he’s not available,” Ms Conde-Sharpe told BBC Radio Northampton.
She said she held no grudges and had hoped Dyche would get the job.
“He’s a great Kettering lad.
“He never forgets his roots. He’s done so much for Kettering Football Club, he never charges the club for appearances.”
