Williamsport Elementary School was originally constructed in 1959, with a small classroom addition in 1965. The school had not received a major renovation in its 41 year life. As a result, major issues with the existing building included life safety, energy efficiency, and Americans with Disabilities Act compliance (although some efforts to provide ADA accessibility had been made in recent years). The existing building is brick with floor to ceiling aluminum non-thermal windows in all classrooms and along many corridors and support spaces. The roof is flat with large skylights over classrooms.

This project, bid under budget including alternates in July 2001, included a complete renovation of the facility. All mechanical, electrical, and plumbing components were replaced, as well as all window systems, and new interior casework and finishes. Skylights remain an important feature in classroom areas.

Three additions were constructed. The larger houses the gymnasium, cafeteria, kitchen, art and music rooms. The gymnasium and cafeteria are separated by an operable partition to allow for large assemblies. This wing is supported by an independent HVAC system to allow for evening and weekend community use without affecting the overall energy efficiency of the school.

The second addition comprises the kindergarten wing, housing three classrooms and a support area. An entrance independent of the main entrance allows for student pickup and drop off without disrupting the remainder of the school. The third addition to the front of the school expands the existing administrative area. housing a conference room, health suite, offices and reception area.