Should You Buy or Rent in SF? Tell Me How Long You’re Staying

I’m going to say something that most agents won’t.

If you are leaving San Francisco in two years, you probably should not buy.

There are neighborhoods in The City right now where your rent is $2,000 less per month than what your mortgage would be on a comparable property. That is not small. That is real cash flow. That is travel. That is liquidity. That is optionality.

And yet people still feel this pressure to buy.

Because owning sounds responsible. Because renting sounds temporary. Because someone told them they’re “throwing money away.”

Let’s slow that down.

The question is not whether renting builds equity. It doesn’t. The question is whether you will be here long enough for ownership to overcome friction.

What friction?

Transfer tax. Escrow. Title. Lender fees. Inspections. Repairs. And eventually, when you sell, commissions and staging. In San Francisco, those numbers are not gentle. On a short timeline, they matter more than appreciation.

So when someone asks me, “Should I buy or keep renting in San Francisco?” the first thing I ask is not about rates.

I ask: how long are you staying?

If the honest answer is two or three years, buying is often a mistake. Appreciation does not reliably outrun transaction costs on a compressed runway. You are taking on risk for a payoff that may not have time to materialize.

But if you tell me you are staying seven years or longer, everything shifts.

Now we can talk about Proposition 13 and predictable property taxes. Now we can talk about principal paydown. Now we can talk about how well-located property in supply-constrained neighborhoods tends to behave over longer cycles. Now time is working for you instead of against you.

San Francisco is not a short-term market. It rewards patience. It punishes haste.

I’ve watched buyers rush in because they were afraid of missing out, only to relocate two years later and feel trapped by timing. I’ve also watched people hesitate for years, then look back and realize they effectively paid someone else’s mortgage while prices reset upward again.

There is no ideology here. There is only runway.

This is why I run what I call a break-even audit. We model your expected hold period. We account for purchase costs, eventual selling costs, conservative appreciation, tax treatment, and your rent trajectory. We look at worst-case, base-case, and realistic-case scenarios. Then we decide.

Sometimes the math says rent.

Sometimes it says buy.

But it never says “always.”

If your rent is $2,000 less than a mortgage right now, that gap deserves respect. If you are building a life here for the next decade, that gap may shrink in importance over time. The only irresponsible move is making the decision emotionally instead of numerically.

If you want to know which side of that line you’re actually on, we can run the numbers. It takes about an hour. And you’ll walk away knowing whether renting or buying is better for you.