Microsoft has gone big and broken ground on its new Silicon Valley headquarters, with a sustainability-minded plan to modernize its Mountain View, California outpost. The 32-acre campus might seem small when compared to the company’s sprawling, 500-acre flagship location in Redmond, Washington, but Microsoft’s pursuit of a net zero non-potable water certification under the Living Building Challenge will make them the first tech company to totally reuse non-potable water. The redevelopment plans come as WRNS Studio replaced SOM early last year as Microsoft’s designers of choice.

The redevelopment is leaning hard on a green modernization, with Microsoft pursuing LEED Platinum certification for all of its new buildings, committing to the WELL Building standards for the interiors, and integrating cross-laminated timber (CLT) throughout all of the new buildings to cut material usage. In trying to meet their water-use reduction goals, and acknowledging California’s limited groundwater availability, the campus will feature rainwater catchments and an on-site wastewater treatment plant so that drinkable water can be recycled for other uses.

Because the campus is next to Stevens Creek, the tech giant is also introducing a 4-acre, occupiable green roof solely planted with native species. Rooftop solar panels will also help cut the campus’s energy usage, while the buildings will let natural light in through their uniformly large windows. Not to be outdone by the main, Seattle-adjacent campus, the project will also include an underground parking garage topped by a soccer field and a new athletics facility, while returning the former parking lots to nature. Besides modernizing the office space of their 2,000 San Francisco Bay Area-employees, the new campus will feature a renovated dining hall, new theater, conference center, and a “Microsoft Technology Center.”

Microsoft has provided a full fly-through video of their plans below.

The new Mountain View campus plan increases the existing 515,000-square-foot campus to 643,000 square feet, and comes amidst the recent opening of Apple’s new space-aged campus nearby. Similarly, Microsoft’s renovation of its main headquarters in Redmond, announced at the same time as its Silicon Valley campus, feels like a direct response to Amazon’s city-hopping HQ2 plans.

Microsoft’s Silicon Valley campus is on track to re-open sometime in 2019.