They were arrested by police investigating a feud between rival gangs in Croxteth and Norris Green.
Croxteth councillor Peter Mitchell said if the warehouse is built, the new homes would still go ahead.
Eleven-year-old Rhys, from Croxteth, was shot as he made his way home from football practice in August 2007.
BBC: Work starts on Rhys Jones Community Centre in Liverpool
Much of the interior of Croxteth Hall's Queen Anne or south-west wing was destroyed by the blaze in 1952.
However, United boss Ferguson decided against taking him to Goodison Park, where the Croxteth-born forward shot to prominence as a 16-year-old.
Anthony Jewell, 23, of Walmersley Road, Bury, who denied all charges was boss of a gang known as Croxteth Young Guns.
Ryan Holden, 20, of Montrovia Road, Fazakerly, and Sam Hughes, 20, of Exford Road, Croxteth, were convicted of the same charge.
The so-called Croxteth Crew members were convicted after a police investigation into a feud between groups in Croxteth and Norris Green.
The work will be funded by the Croxteth Estate Endowment Trust Fund.
Mark Thomas, 19, of Stonedale Crescent, Croxteth was detained for 16 years with four years extended on licence for the same conspiracy charges.
Bob Pendleton, the Everton scout who discovered Rooney as a nine-year-old on the public parks of Croxteth, also re-lived his experiences of the young player and his family.
To find out more about Rooney, we travelled to his native city and spent a day in Croxteth, the tough estate he was born into and that shaped his personality.
The schoolboy was shot in the car park of the former Fir Tree pub in Croxteth when he was caught in the crossfire between two gangs as he left a nearby football pitch.
BBC: Work starts on Rhys Jones Community Centre in Liverpool
Jewell, of Walmersley Road, Bury, and Thomas, of Stonedale Crescent, Croxteth, were convicted of conspiracy to possess firearms with intent to supply and conspiracy to commit arson being reckless as to whether life was endangered.
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