The win also makes up for the pain Subiaco has felt the previous two seasons by losing Grand Finals to Peel Thunder. Remarkably this was Subiaco's fifth straight Grand Final appearance and they have three premierships to show for it.
Inspirational Subiaco captain Kyal Horsley has led the Lions into each of those Grand Finals and is now a four-time premiership player and three times as captain.
To cap it off, he was the best player on the ground with 34 possessions, eight tackles, 10 inside-50 entries and two goals to claim the Simpson Medal having been runner-up in voting the previous two years.
It also helps to make up for missing out on the Sandover Medal with a fourth top three finish of his career, but having played in four premierships from eight Grand Finals in his 181-game career make him the most decorated player currently in the WAFL.
While Horsley became a four-time premiership player, Chris Phelan (34 possessions, eight tackles, seven marks, seven inside 50s), Lachlan Delahunty (25 disposals, 13 hit outs) and Clancy Wheeler (14 touches, one goal) all become the winners of three flags with Subiaco.
Leigh Kitchin (21 possessions, 18 tackles), Jordan Lockyer (19 disposals, eight marks), Hayden Kennedy (19 touches), Kyle Halligan (five goals), Aaron Heal (21 possessions, nine marks) and Rhys Waters (three goals) are now all two-time premiership winners as well.
Josh Deluca had a brilliant season for Subiaco to put himself back in the mix for another AFL crack and he had 29 possessions and eight tackles as he became a four-time premiership player – two at Subiaco and two with Peel.
It was a dominant performance all over the field by Subiaco led by ruckman Zac Clarke who gave his gun on-ballers first use despite hurting a hand. He finished with 17 touches, seven marks and 50 hit outs.
The Subiaco defence was superb led by Lockyer's job holding Bernie Naylor Medallist Tyler Keitel scoreless. Angus Litherland had a good battle with Andrew Strijk and the Lions backman had 22 possessions and five marks.
Former Falcon Drew Rohde held Keegan Knott to one behind while having 20 touches and six marks himself too.
Then up forward, Ben Sokol and Halligan kicked five goals apiece and Rhys Waters added three with Subiaco's mid-size attacking options proving unstoppable.
Justin Joyce also had 18 possessions, Ben Newton 18, Braden Fimmano 15 (seven tackles) and Greg Clarke 14 (five marks, five tackles).
It was a tough day for West Perth but it had been a tremendous effort by the Falcons to reach the Grand Final.
Captain Aaron Black battled tirelessly for West Perth with 27 possessions, nine tackles and two goals. Shane Nelson also racked up another 28 possessions for the Falcons with Mitch Peirce fighting hard for 23 disposals, 10 tackles and a goal.
Corey Chalmers also kicked two goals while Jordan Mills battled away solidly opposed to Subiaco veteran Clancy Wheeler.
It was the last game for decorated West Perth ruckman and 2013 premiership player Chris Keunen.
It was a ferocious opening to the Grand Final and both teams missed some gettable shots on goal early. It took over 17 minutes for the first goal but eventually it came courtesy of the cool head of Subiaco veteran Chris Phelan.
The Lions then added three more from Rhys Waters, Ben Sokol and Kyle Halligan before quarter-time.
West Perth scored its first goal of the Grand Final a minute into the second quarter with Mitch Peirce kicking truly, but Subiaco responded three minutes later through Clancy Wheeler. Halligan then added his second and when Sokol also kicked his second, the lead grew to 42 points.
West Perth's second came courtesy of captain Aaron Black when he might have been lucky to get into the protected area, but he took advantage to smother the ball and then kick truly.
Subiaco again responded, though, with Halligan and Sokol kicking goals before half-time with the Lions up by 47 points at the break.
It was going to take something special for West Perth to fightback in the second half but that wasn’t to be with Kyal Horsley and Zac Clarke both kicking goals for Subiaco in the opening 10 minutes.
The lead ballooned to 79 points by the time Halligan, Horsley and Sokol kicked goals too with Horsley's an especially remarkable effort from the boundary as the pain of the last two years disappeared.
West Perth did manage a couple of late third quarter goals through Corey Chalmers and Andrew Strijk, but Subiaco was still up by 74 points at the last change.
An 100-point defeat was on the cards with Subiaco up by 88 midway through the last term but West Perth at least fought the game out with three last quarter goals as the Lions romped to a premiership three years in the making by 81 points.