The structure is 27 stories, 173 metres (568 ft) tall, over 37,000 square metres (400,000 sq ft), and with amenities including a 168-car garage, ballroom, nine high-speed lifts, a 50-seat theatre, terrace gardens, swimming pool, spa, health centre, temple, and snow room that spits out snowflakes from the walls.

[5] In 2007, due to a sustained real estate bubble in Mumbai, Ambani's unbuilt house and the 4,532-square-metre plot on which it is being erected were already estimated to be worth more than US$1.2 billion.

[6][unreliable source] In 2014, it was considered the world's most expensive private residence, costing between US$1 and 2 billion to build.

The Waqf minister Nawab Malik opposed this land sale, as did the revenue department of the Government of Maharashtra.

The Waqf board also initially opposed the deal and filed a PIL in the Supreme Court challenging the decision of the trust.

They were consulted after Nita Dalal Ambani was impressed by the contemporary Asian interiors at the Mandarin Oriental, New York, also designed by them.

[33] The building plan was approved by the Brihanmumbai Municipal Corporation in 2003,[34] and construction started in 2006 with Leighton Asia initially taking charge, and completed by B. E. Billimoria & Company Ltd.[35] The architects altered floor plans and design concepts as the construction of the building progressed.

The helipads have to be certified air-worthy in India by the Director-General of Civil Aviation (DGCA), and have yet to receive approval from the central defence and environment ministries.

[41] In June 2011, almost 50 renowned pandits were invited to conduct pujas and address vastu issues in the building, after which the Ambanis took up residence in September 2011.

[6][unreliable source] During planning, the house was expected to be the world's largest and most expensive home, with a cost of about US$2 billion.

[44] On 25 February 2021, a car containing 20 explosive gelatin sticks and a threatening letter targeting the Ambanis, was found near Antilia.

After the sniffer dogs detected explosives, the bomb squad removed the gelatin sticks, which were found to be not assembled, and had no battery or detonator.