Construction group BAM has been appointed to develop the second office building at the £500 million Paradise project in Birmingham city centre.
The company, which is also currently will develop 183,000 sq ft across eight floors including ground-floor retail space.
Two Chamberlain Square will be built next to the site vacated by the old Central Library and Paradise Forum and be completed in 2019.
A new image has also been released (below) showing how the finished complex will look.
Its neighbour One Chamberlain Square, the is due to be finished in autumn 2018.
The enabling and infrastructure works for both buildings are already under way, with piling for the foundations for Two Chamberlain Square currently being drilled up to 20 metres into the ground.
BAM, which also carried out and led will begin construction of the building itself in September following the completion of two levels of basement.
Chris Taylor, head of private markets at Hermes Investment Management, said: "Our confidence in Birmingham is such that we are pushing ahead with the speculative development of Two Chamberlain Square.
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"Paradise will transform the centre of Birmingham and we are excited to announce that BAM will be beginning construction next year ahead of a scheduled completion in 2019."
Rob Groves, regional director at Argent which is managing the overall Paradise development, added: "BAM has a fantastic track record, which we've experienced first-hand at Brindleyplace and King's Cross.
"This building, alongside One Chamberlain Square, is set to be one of Birmingham's most impressive and is further evidence that exciting things are happening in the city."
Rod Stiles, regional director for BAM Construction in the Midlands, said: "The confidence to move ahead with prestigious new offices at Two Chamberlain Square is a truly positive sign for the region's economy.
"BAM has a great deal of experience building striking developments in Birmingham and we're delighted our expertise, working with Glenn Howells, BAM Design and Arup, has afforded us an opportunity to help deliver this exciting development."
The Paradise redevelopment is being brought forward through Paradise Circus Limited Partnership, a private-public joint venture with Birmingham City Council.
It will eventually comprise eight office buildings, a new hotel, public realm and a redesigned traffic flow around the old Paradise Circus island.