Diane Williams Library at Lions Park

Rendering of Diane Williams Library at Lions Park

Project Update: Construction Underway on New Library Facility! 

On Monday, July 14, 2025, construction began on a long-awaited project that will bring modern, expanded library services to the western portion of Rancho Cucamonga! 

This project (formally known as the Westside Library Expansion Project) will replace the existing Archibald Library, which has significant infrastructure challenges, with a new and improved library facility at the City-owned Lions East and West buildings. The current Archibald site has been evaluated and found unable to meet our community’s future needs, and continuing to invest in it would not be fiscally responsible. 

Why It Matters: 

As part of our General Plan update, Plan RC, this investment brings critical services to an area of our City that has not seen a new community facility in over 15 years. The new space will better serve residents with flexible, inclusive, and modern amenities. 

What to Expect During Construction: 

Nearby residents and businesses may notice construction-related noise and activity during work hours. We appreciate your patience and understanding as we work to enhance library services for our community. 

New Additions to the Project

The City Council recently approved the addition a 2,240 square foot enclosed climatized corridor that will connect the East and West buildings! Funding for this new feature was made possible by a $1.2M contribution from Second District Supervisor Jesse Armendarez of the County of San Bernardino. Grading and ground preparation have begun in anticipation of the corridor.

Project Highlights: 

  • Full interior renovation of Lions East and West buildings
  • New accessible, climate-controlled corridor connecting both buildings
  • Dedicated spaces for collections, community events, and study rooms
  • Modernized customer service counters and staff areas
  • Exterior updates: fresh paint, new finishes, signage, windows
  • Enhanced site access with new pathways and landscaping
  • Upgraded lighting, infrastructure, HVAC, plumbing, and electrical systems

Timeline: 

  • Construction Began: July 2025
  • Estimated Completion: March 2027 with the opening in April 2027

Thank you for your continued support as we build a better, more inclusive future for Rancho Cucamonga. Stay tuned for updates throughout the construction process!