We're talking narrow, brick-fronted rowhouses with clean lines, flat or low-pitched rooflines, and restrained ornamentation — a style that feels more East Coast mercantile than West Coast whimsy. One SF resident recently noticed the block near the Transamerica Pyramid and asked the question plenty of us have wondered: what is this style, and where else can you find it?

The short answer: these are largely Italianate and Federal-style commercial buildings dating back to the mid-1800s, survivors of the Gold Rush building boom that gave San Francisco its first real urban fabric. Jackson Square Historic District is ground zero — it's one of the few areas that escaped the 1906 earthquake and fire largely intact, which is why these buildings still exist at all.

Here's the thing that should make every housing policy wonk's eye twitch: these buildings are dense. They share walls. They sit right on the lot line. They mix commercial and residential uses without anyone filing an environmental impact report. In other words, San Francisco's oldest surviving architecture is exactly the kind of organic, compact urban development that our modern zoning code has spent decades making illegal.

You want to know why we can't build affordable, human-scaled housing anymore? Walk past these blocks, admire them, and then go read the Planning Code. Nineteenth-century builders didn't need a conditional use permit and three community meetings to put up a rowhouse. They just built.

San Francisco's Brooklyn blocks aren't just architectural curiosities — they're a quiet reminder that this city once knew how to grow without strangling itself in red tape. Maybe it's time we remembered how.