Great question—and the short answer is: it depends on the location, purpose, and local regulations. But here’s the real talk from someone who’s worked with municipal projects and commercial landscaping.
Most permanent street benches, especially those in high-traffic public areas like parks, transit stops, and plazas, are indeed bolted down permanently into concrete footings. They usually use heavy-duty stainless steel or galvanized expansion bolts, and once set, that bench isn't going anywhere without serious demolition equipment. That's for security and theft deterrence.
However—and this is the part a lot of people overlook—removable anchoring plates are actually quite common in certain situations. If you're dealing with a temporary event space, a privately owned but publicly accessible plaza, or even seasonal outdoor dining setups, the bench likely sits on a surface-mounted base plate that's bolted into the ground with machine screws or concrete anchors that can be unthreaded. Underneath, the plate may be fastened with removable nuts or threaded sleeves, allowing the whole bench to be lifted off intact.
For example, many modern urban furniture manufacturers now offer “surface mount” hardware with tamper-resistant bolts. While these are still physically secured, the key difference is that you can disassemble or unbolt the bench without breaking the concrete. This is huge if you need to repave, move seating zones, or comply with accessibility adjustments.
So: permanent bolting = max security, zero mobility. Removable plates = flexibility with moderate security. Choose based on your specific need. If you're installing them yourself, always check with local code—some municipalities require permanent fixation for any bench on public Right of Way (ROW). But if you’re managing a courtyard or a corporate campus, removable plates are often the smarter, more adaptive choice.