Sohel Rana, owner of the Rana Plaza factory complex on the outskirts of Dhaka, was one of around 40 people whom police said this week would be charged in connection with the disaster on April 24 last year.
He faces murder charges.
The government announced the property seizures months after the High Court ordered them confiscated, and just one week before the first anniversary of the tragedy in the industrial district of Savar.
The High Court ordered the seizures as part of investigations into Rana, 36, who became public enemy number one after the disaster.
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Survivors recounted to media how Rana demanded they work their shifts despite complaints about cracks appearing in the building's pillars the day before its collapse.
Rana, a junior official in the ruling Awami League party, was arrested on the western border with India as he tried to flee days after the collapse.
Bangladesh has become the world's second largest clothing producer after China with USD 22 billion in exports last year, mainly to retailers in Europe and the United States.
Retailers including Walmart, Tesco and Carrefour source large amounts of their apparel from Bangladesh, home to around 4,500 garment factories.