Manor Group chief executive Adam Yates said the new development had been 15 months in the planning and would include three floors of offices and up to five ground-floor retail shops.
It also would include 122 carparks, 76 of which will be in the basement, a large foyer entrance off Cameron Rd, a "glass curtain" which will offer "dramatic views" towards the Mount and the estuary and a number of energy saving features, he said.
"We're aiming to making the building as energy efficient as possible when it comes to lighting, heating and power and will use solar technology as much as we can," Mr Yates said.
"It could have as many as 1000 solar panels on it when it is finished."
Mr Yates said 3000sq m of office space had already been let by a well-known local commercial business which had signed a long-term lease to occupy the first and second floors. He was unable to reveal who the new tenant was or how many staff it employed because of a confidentiality agreement.
"Once fully tenanted perhaps 500 to 600 people could be working in this building," he said.
Mr Yates said he and Manor Group's six staff would also occupy the new complex.
The building right on the edge of the commercial city centre zone offered easy access to people coming off Route K highway into the central city, he said.
A resource consent had been lodged with Tauranga City Council and Mr Yates expected this to be signed off within the week.
Demolition was scheduled to start in August with earthworks beginning in October and construction finished by November 2016.
Some existing tenants had already moved elsewhere in the city and others would do so by July.
Mr Yates said the new development had been marketed to the Auckland and Christchurch market. "It really creates an opportunity for people in Auckland and Christchurch who are keen to relocate their business to Tauranga or someone to establish a new business in our purpose-built new building," he said.
By the numbers
* $20m joint venture
* Four-storey 7000sq m complex
* Three floors of office spaces
* Up to 5 retail shop spaces on the ground floor
* 122 car parks including 76 in the basement
* A number of energy saving features including the use of solar technology
* Demolition work starts in August
* Construction of new building starts in October
* Completion date scheduled for November 2016
Companies involved
* Manor Group Investment is responsible for the nearly completed Kempton Park Village complex in Bethlehem.
* Construction firm Watts & Hughes will build the new complex which has been designed by architect David Wingate of Wingate + Farquhar.
