When a Reddit thread asked which Bay Area towns are running hottest right now, the honest answer isn't one market — it's two moving in opposite directions. The South Bay is bidding-war country. Cross the bridges into the East Bay and Marin, and buyers are the ones with leverage.

Two of the most-watched housing datasets — Redfin's May 2026 competitiveness ranking and Zillow's forward-looking "hottest markets" list for 2026 — agree on the shape of the Bay Area market even as their headline numbers seem to clash. Together they explain why "the Bay Area housing market" is a misleading singular: AI money has turned Santa Clara County into one of the most competitive corners of the country, while the East Bay stays cool enough to pull the broader San Francisco metro down toward the middle of the national pack.

A question on r/bayarea — which towns are the most "heated," and are any of them surprising — has a data-backed answer, and the surprise is that the region no longer moves as one market.

By Redfin's May 2026 tally of homes selling above asking price (external source, opens in a new tab), the Bay Area is among the hottest places in America to try to buy. Some 57.3% of San Francisco-area homes and 53.2% of San Jose-area homes sold over their list price in May — ranking second and third among the 50 largest U.S. metros, behind only Newark. Oakland placed fifth nationally at 46%, and Redfin's table shows over-asking shares rising year over year across all three Bay Area metros.

Redfin pins the frenzy on the AI sector: newly minted salaries and bonuses at the region's artificial-intelligence firms are being funneled straight into home purchases, the analysis argues. The company's data also had San Jose and San Francisco posting the nation's fastest home-price growth in May, both up by double digits from a year earlier.

So why did Zillow's separate 2026 "hottest markets" ranking (external source, opens in a new tab) put the San Jose metro fifth in the country — but bury the San Francisco metro at 38th? Because the two lists measure different things. Redfin is counting what already happened at the closing table; Zillow is predicting where competition will be fiercest, and it weights affordability heavily. Seven of Zillow's top 10 sit in the relatively cheap inner Northeast, where a bigger pool of buyers can actually afford to bid.

The geography inside Zillow's definitions is the real tell. Its San Jose metro is Santa Clara and San Benito counties — the heart of AI-payroll country. Its San Francisco metro folds in Marin, San Mateo and Alameda counties, and those East Bay and North Bay markets have been comparatively sluggish.

So why did Zillow's separate 2026 "hottest markets" ranking put the San Jose metro fifth in the country — but bury the San Francisco metro at 38th?

"For reasons that aren't entirely clear, inventory has fallen much more steeply in the Northeast than it has in California," Kara Ng, a senior economist at Zillow, told the San Francisco Chronicle, adding that San Francisco-area listings have returned roughly to pre-pandemic levels. Zillow expects inflation-adjusted home values across the San Francisco metro to keep sliding through the end of 2026 even as the South Bay runs hot.

That split leaves agents inside the city describing a market that feels nothing like a 38th-place also-ran. "You have buyers who are just competing for scraps," Mary Macpherson, founder of San Francisco's Vantage Realty, told the Chronicle, saying she was surprised the city didn't rank higher and that the local market had heated up only recently.

The upshot for anyone actually shopping: the "surprising towns" aren't obscure. They're the South Bay job hubs — San Jose and Santa Clara County — where a wave of tech compensation is meeting a chronic shortage of listings. The genuinely cooler ground is the East Bay, where Zillow's math says buyers still have room to negotiate. In one region, on the same weekend, you can find both the country's most cutthroat bidding wars and one of its more forgiving markets — separated by a bridge toll.