Kompany watched Manchester United's shocking 1-0 defeat to West Brom, which handed City the title on Sunday, with his wife Carla at her United-supporting father's home before broadcasting his celebrations live on social media.
City have a 13-point lead over second-placed Manchester United with six league games left but have been jolted by a run of three straight defeats in all competitions.
By completing the job after 33 games, City have emulated the achievement of United, who secured the crown with the same number of matches to spare in 2001.
It is City's third title in seven seasons and a first under the Spaniard in his second campaign in charge.
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Kompany was on hand in the wake of United handing the title to City to offer his take on Pep Guardiola's side securing glory.
City's Champions League conqueror moved ever closer to sealing its place in the competition next season as Liverpool cruised past Bournemouth with Salah again taking centrestage.
"The first time you win it, you think you'll win all of them", said Kompany.
"You want to hold onto this feeling now".
"That's the reason why they were champions and probably because I won eight championships I was not in the moon [sic] with the victory against them [last week] because that doesn't make me feel super happy. It's a hard achievement and I'm proud of the team and everyone involved". And in the space of a minute and a half, Man City go from the most revered side in the league, to the pile of absolute crap that they were before the club was squirted with oily goodness.
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Raheem Sterling , who, not for the first time, has come under scrutiny, got City's third in the 72nd minute. Tottenham boss Mauricio Pochettino blamed a lacklustre opening for their 3-1 defeat to Manchester City .
'We all believed in it, otherwise it wouldn't happen, ' Kompany said.
Former Arsenal striker Thierry Henry on Sky Sports: They deserve to be champions, I am sure they would have liked to do it against Swansea but now they can play against Swansea with a happier smile on their face because they all know they're champions and they deserve it.
"We've won you the league, Manchester City, we've won you the league", sang West Brom's fans near the end of the game. My teammates will roll their eyes as I want to see the reaction from us next season as I've never been able to retain a title. "I have won titles".
"Well, it differs in the fact that we were consistent for the whole season", he admitted. They've been by far the best team in the league.
"West Brom is a club I care about a lot", he said.
This is our proudest victory, says Vincent Kompany
Manchester City celebrated the title with posting this image on its official social media platforms with the caption "Our Time". It was a wonderful goal from Rodriguez - thank you".