Simon Dobbin, who appeared on DIY SOS: The Big Build in January 2019, has died, five years after he was attacked by a group of football fans and left with permanent brain damage.
The father-of-three was set upon after watching Cambridge United play at Southend United in a 90-second attack in March 2015.
The 48-year-old's death was announced by his wife Nicole, also 48, who said he had been his "usual self, laughing and smiling the day before".
She said his passing had been a shock to her and their daughter Emily.
Following Simon's death, Essex Police have said they will "review" the initial investigation from the incident and discussions are being held over whether any more charges will be brought against the attackers.
Stephen Jennings, Essex Police's Detective Chief Inspector, said: "Our thoughts go to Simon's family and friends at this very difficult time.
"We will review the initial investigation to establish whether we need to take any further action."
Two years after the attack, in July 2017, 13 men were convicted of charges related to the horrific incident.
Nine were jailed for violent disorder, with sentences ranging between 16 months and five years.
Three were jailed for conspiracy to commit violent disorder, with the sentences being two-and-a-half years and three years.
A thirteenth man was convicted of assisting an offender and given a suspended sentence.
However all of the men who were jailed have since been released, with Nicole telling the Daily Mirror in February: "It feels like a slap in the face.
"Every time I look at Simon, I can see the damage they caused him."
During the incident, Simon had been on his way home from the match when rival supporters left a pub and "jumped" Cambridge fans.
A witness said the attackers "just used [Simon] like a football", with the dad suffering brain damage, damaged hips, broken ribs and a broken nose.
He spent three weeks on life support.
When Simon appeared on DIY SOS, host Nick Knowles and a team of more than 900 volunteers helped transform his home.
Permission for an extension was denied by the local council, so the show had to work within the home's internal walls.
Improvements made included the creation of a wet room, so Simon would be able to shower, after he had been forced to have bed baths and sleep in the living room.
Nicole said at the time: "The changes that DIY SOS made to the house have made life so much easier for all of us."