By the time you've toured a place in San Francisco, eleven other people have too, and someone's already waving a folder of pay stubs at the agent. You get maybe nine minutes to decide where you'll live the next chapter of your life.
Here's what to actually check in that window, courtesy of every San Franciscan who learned it the hard way.
Sit in total silence for two full minutes

Turn your phone off and just stand in the middle of the room without talking. Suddenly you can hear everything: the floor creaking under the neighbor upstairs, the brakes of the bus wheezing to a stop, the elevator that dings or clangs every time someone comes home at 1 a.m.
The trash chute is the silent killer; if the unit shares a wall with it, you'll hear it even when everyone's being polite, and it doubles as a pest superhighway.
Turn on every faucet and the shower at once

OK I mean, it's a little extra. But if you can: Crank them all at the same time and watch what happens. You're checking water pressure, the temperature swings that turn a morning shower into a hostage negotiation, and how fast the sink and tub actually drain. Weak pressure and a tub that empties like molasses are daily miseries you can't unsee once you've moved in. Better to find out now than at 7 a.m. on a Monday.
Push the buzzer and pray it works

A broken buzzer sounds like a non-issue right up until you're sprinting down three flights every time a delivery driver or your own mail shows up. Test it. If it's dead, ask point-blank when it'll be fixed and watch how the landlord answers. That answer tells you exactly how the next year of maintenance requests will go.
Become a pest detective

Open every cabinet under every sink and take a hard look behind the oven. You're reading the plumbing like tea leaves (professional work, or someone's cousin with a YouTube tutorial?) and scanning for gnaw marks, droppings, and suspicious little holes.
Here's the move nobody mentions: if every outlet in the place is plugged with one of those ultrasonic anti-rodent gadgets, do not applaud the landlord for being proactive. Ask yourself what they already know.
Count the three-prong outlets

Older SF buildings are full of two-prong ungrounded outlets that take exactly one appliance and reject anything that needs a real ground. This sounds trivial until it quietly redesigns your entire floor plan.
I know someone whose two-bedroom became a functional studio because the only properly grounded room was the bedroom, so the desk and the computer and the whole life migrated in there. Count them, and notice where they are.
Follow your nose

Mold and mildew have a smell, and your nose will catch what your eyes miss. Be especially suspicious of a fresh, weirdly localized patch of new paint in one corner of one room. That is rarely a renovation. That is a cover-up, and you'll be the one living with whatever it's hiding.
Find out how the place heats

Radiant heat is lovely and will hand you a PG&E bill that makes you gasp out loud. Ask what kind of system it is and, ideally, what the bills tend to run. And don't shrug off heat as optional, because in a cold, damp SF unit, "just throw on a sweater" is precisely how mold ends up creeping across your closet wall.
Find out if it's rent-controlled

This single fact quietly decides your financial future in this city. Rent control in San Francisco generally applies to multi-unit buildings built on or before June 13, 1979, and you can verify the construction date yourself by searching the address on the city's Property Information Map.
A rent-controlled unit caps your annual increase at a sliver of market rate. It is, functionally, the difference between getting to stay and getting priced out.
Google your would-be landlord before you fall in love

Search the management company's name and actually read what comes back. You're looking for patterns: the same complaints over and over, a habit of getting sued, a quiet rebrand to outrun a bad reputation. And while you've got someone on the phone, ask the question agents hate most: why did the last tenant leave?
Figure out which side of the fog you're on

San Francisco is a stack of microclimates, and which hill you land on decides whether you're buying sundresses or a year-round fleece. Two neighborhoods six miles apart can differ by twenty degrees and an entire wall of fog. Personally, I like the fog. Many people don't.
Apps like Mr. Chilly map it block by block, but the real test is standing on the sidewalk at the hour you'll actually be home. Noe Valley bakes while the Outer Sunset broods under gray, so choose on purpose.
Walk the actual hill between your door and your coffee

"Is it hilly" is the wrong question. The right one is whether you'll be hauling a week of groceries up a forty-degree pitch into the wind, every single time, forever. Walk the real route from the front door to the things you do daily: the coffee, the market, the bus stop. Your calves and your future self will thank you.
Come back at midnight, then again on a Saturday
The block that's serene on a Tuesday afternoon can be a completely different animal after dark. Do a lap at midnight and another on a weekend night before you commit to anything. And know thyself: don't move onto one of the liveliest streets in the city and then file noise complaints about people simply existing outside at 1 a.m. The vibe you tour is not always the vibe you sign for.
Talk to the people who already live there
Hang around the block for a few minutes and say hi to anyone walking in or out of the neighboring buildings. Tell them you're eyeing a place nearby and ask, plainly, if they like living there. You'll get more honest intel in fifteen sidewalk minutes than in any amount of online sleuthing. Neighbors have no listing to protect.
Learn when the garbage trucks come
Find out the Recology pickup schedule, because a building serviced at 4 a.m. means a full year of backup beeps drilling directly into your dreams. While you're mapping the block's daily rhythms, glance at the car-break-in heat map and figure out where packages actually land so you're not gifting them to porch pirates. These are the unglamorous details that quietly run your quality of life.
None of this is paranoia. Staying in this city is hard, and your apartment is the set where your entire San Francisco life plays out: the dinner parties, the heartbreaks, the deck garden you're not technically allowed to build. Run the checklist. You're not just hunting for a place that won't betray you. You're hunting for the one that's worth all the trouble it takes to stay.
Saul Sugarman is editor-in-chief and owner of The Bold Italic.
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