Herrero partnered with the Nueva School to complete two major, transformative projects for its upper and lower school campuses.

The new Hillside Learning Complex, located on the Hillsborough upper campus, houses Nueva School's middle school grades 5 to 8. Herrero's build-out entailed three new buildings: a one-story student center with a living roof, kitchen, and dining area; a three-story classroom building featuring administrative offices and a state-of-the-art research space known as the I-Lab; and a one-story student library serving both upper and lower schools. The complex also boasts unique outdoor spaces, including a plaza and an amphitheater. The project went on to receive LEED-Gold certification for it's significant sustainability efforts, including: low flow toilets, photovoltaic panels, radiant heat flooring, recycled wood screens shielding classrooms from unwanted sun, and operable windows. All construction and extensive site work was carefully performed while the school was still occupied.

Herrero was also engaged to rehabilitate the historic Crocker Mansion to house classrooms for the Nueva School's lower campus, pre-K to 4th grade. Herrrero's work involved a seismic retrofit and improvements to access, including an elevator and ramps. Herrero refurbished the mansion exterior and restored the ballroom and lobby to their original beauty and elegance. Project challenges included a tight schedule to conduct work within 72 days during the summer each year while students were on break. Summer functions for K-12 students were still held at the upper campus during construction.

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