Bellchambers took to social media on Wednesday night to announce the deal, before the Bombers confirmed his signature on Thursday morning.
“I am super happy to re-sign as I have huge belief that the list and club are in a great place on and off the field,” Bellchambers told essendonfc.com.au.
“Being a one club player is important to me. I was excited when I got the call 11 years ago to come to Essendon and I’m even more excited to stay and build on what we have started with Woosha and Hepp.
“I have been working closely with Hayden Skipworth and the High Performance team this year to manage my body, and I think my best footy is in front of me.”
The Bombers’ big man is in career best form, averaging 32.1 hit-outs and 11 disposals a game this season and he has only missed one game for the year.
He has spent a large part of his career battling various injuries and has struggled to get continuity in his football but now that he is fit and playing regular games, he is starting to reach the potential that Essendon fans saw in the early parts of his career.
The 28-year-old was dominant against one of the league’s best ruckman in Nic Naitanui last weekend with 22 hit-outs, kicking an early goal to help set up the Bombers’ biggest win of the season.
Bellchambers has played 105 games in the red and black but looks set to add quite a few more to that total over the next couple of years.