Villa were dominant during the final phase of the Championship last season, but the lack of consistency during the first half of last term proves that they still have plenty of flaws in their side.
"Ezri fits the profile of the type of player we were searching for." he said.
Konsa links up with Villa in time for their pre-season trip to the United States.
The defender joined Brentford from Charlton Athletic in the summer of 2018, costing the Bees an estimated fee of £2.5m.
Villa now have three central defenders - James Chester, Tyrone Mings, and Kortney Hause, and need another centre-back to compete for centre-back positions.
Dean Smith has also brought in defender Kortney Hause from Wolves, while spending 14 million pounds on signing left-back Matt Targett from Southampton. I think everybody could see the connection that he made with the club as a whole and it is excellent news that we can continue the relationship in the Premier League.More news: Lampard's Chelsea reign begins with draw
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Aston Villa have also penned forward Wesley from Club Brugge.
"To be honest, I am speechless right now". As a kid I always used to dream about playing in the Premier League and for it to actually happen now is a dream come true for me and my family.
The player has previously been linked with a move to the Premier League but after a poor Wold Cup last summer these reports went quiet. I can't wait to get started with Dean and Richard again.
"It's a challenge that I look forward to very much".
"I enjoyed it with them at Brentford".
"For me to be here and working with those guys is a good feeling".