Standards and Recommendations for Window Replacement

Publication update: April 2025

Windows are an integral part of the design and character of most buildings, and choosing appropriate replacement windows is frequently a critical aspect of any rehabilitation project. Windows have a variety of different window shapes, muntin profiles, methods of operation and configurations; therefore, minor changes may alter the appearance of a building.

To assist with your window replacement project, this document includes information on:

• Historic Designations in San Francisco
• Window Components
• Window Replacement for "Category A"
• Frequently Asked Questions – Repair & Replacement of Historic Windows

You are encouraged to review the step-by-step window replacement guide or contact us with any questions before you commit to any purchase of materials.

Note: a building permit is required for all types of window replacement (despite the location on a building) including enlarging existing windows or adding new windows openings.