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Welcome to the Capitol Annex Project

Welcome to the California Capitol Annex Project. Each year, more than a million visitors converge on their state Capitol to engage with California’s democratic process. The new Capitol Annex building will ensure that every young student, advocate and community member can fully participate, with spaces designed to be open and welcoming to all.

 

The historic Capitol and new Annex is being designed to expand the public’s access to the legislative process, with modern hearing rooms, more space for visitors and improved access to lawmakers.

 

The Legislature remains committed to delivering a Capitol Annex that welcomes Californians and expands access to the democratic process for generations to come. As the project moves forward, this website will highlight key milestones and features of the new Annex, offering a closer look at how this space is taking shape as a new home for public engagement at the State Capitol.

Frequently Asked Questions

When will the Capitol Annex be completed?

The Annex building is expected to be completed by Fall 2027.

What is the status of the project?

The building is 50% complete as of December 2025.

What is the actual cost of the Annex project to date?

As of December 2025, $573.8 million has been spent.

Announcements

January 30, 2026

A detailed Frequently Asked Questions (FAQs) update on the Annex Project is available in the PDF below, along with video footage documenting atrium installation work.

 

 

December 17, 2025

A detailed update on the Annex Project is available in the PDF below, along with video footage documenting window installation work.