What Does It Mean to Own a Landmarked Historic Building?

Reflections of afternoon sun shimmer on a historic building on Clarence Place in SoMa. Photograph by Sean Timberlake.

San Francisco’s historic architecture is one of the things that makes living here so special. But if you’re buying an older home—or thinking about remodeling one—you may have wondered: What happens if my property is a landmark?

There’s a common perception that landmark status means a building is essentially frozen in time. That’s not really the case. San Francisco Heritage points out that landmark designation doesn’t automatically prevent a property from being remodeled, expanded or incorporated into a larger development. Instead, it generally means that significant changes receive additional review, with an eye toward preserving the features that make the property historically significant.

And despite San Francisco’s reputation for having strict preservation rules, relatively few properties are actually designated landmarks. There are fewer than 400 individual landmarks in the city, along with roughly 1,100 buildings located within historic districts.

Local non-profit SF Heritage is advocating for more landmarks, and in May On May 28, 2026, Mayor Lurie and President of the Board of Supervisors Mandelman announced their commitment to streamline the legislative process and increase city-designated historic landmarks and districts.Even after the Planning Department’s stated goal of adding 2,500 properties to the landmark program, only about 1–2% of San Francisco’s parcels would have this level of protection.

That’s worth keeping in mind when you’re looking at a historic property. “Old” doesn’t necessarily mean “landmarked,” and “landmarked” doesn’t necessarily mean “untouchable.” There can be plenty of room for thoughtful renovation and adaptation. In fact, San Francisco has several examples of historic buildings being incorporated into new housing and development rather than simply being preserved as-is.

For buyers, the takeaway is simple: if you fall in love with an older San Francisco home, don’t assume you know what you can—or can’t—do with it based on its age or appearance. Before making plans, it’s worth understanding the property’s specific historic status and what that means for future renovations. A little research up front can help you appreciate both the possibilities and the limitations that come with owning a piece of San Francisco history.

This article was written with AI assistance but edited by a human.