August 19 2023: India’s first post office building using 3D printing technology was declared open by Communications and Railway Minister Ashwini Vaishnaw at Cambridge Layout  of Bangalore, yesterday.
Built in just 43 days, the structure cost Rs 26 lakh  which is 40% less than the conventional construction process. By 3 May, the building’s framework was complete, but it took two months to install the drainage and water systems.
The built-up area of the post office is 1021 square feet with Larsen & Tourbo Limited constructing it under the technological guidance of IIT Madras.
Chief Postmaster General S Rajendra Kumar , explaining the 3D construction process, he said there are two types involved. "One construction process involves printing of building elements at a manufacturing facility and assembling at site. The other process is to do the building construction on-site, as per the input design. The new PO building falls under the latter category.
Operations Head of L & T, South and East, George Abraham said the total digital workflow eliminates human error. “The construction cost involved is just 40% of the conventional construction method. Since it is a fully automated process, it assures excellent product quality and is sustainable,” he said.
According to a press release by Larsen and Toubro Construction in April this year, 3D concrete printing is an emerging technology that has the potential to transform construction practices by quickening the construction process and enhancing the build quality.
The release said, "A robotic printer deposits the concrete layer by layer as per the approved design. Special grade concrete which hardens quickly is used to ensure bonding between the layers for printing the structure."
The post office will house the Ulsoor Bazaar post office, which will henceforth be known as Cambridge Layout post office|
Prime Minister Narendra Modi  said in a message: Every Indian would be proud to see India's first 3D printed Post Office at Cambridge Layout, Bengaluru. A testament to our nation's innovation and progress, it also embodies the spirit of a self-reliant India. Compliments to those who have worked hard in ensuring the Post Office's completion.

Video from Minister Vashnaw’s  twitter ( X): https://twitter.com/i/status/1692406662261604615