San Mateo County Housing Stays Hot, But Inventory Surge Signals Shift

Here’s a clear breakdown of what’s happening in the San Mateo County (SMC) housing market from 2024 to 2025 based on data from the MLS for Q1.

Key Highlights:

  • New Listings: Up 16.7% — more sellers are entering the market.
  • Homes Sold: Barely up (+2.6%) — demand is steady but not surging with the new supply. This increases the Inventor levels as buyers are uncertain about the economic future.
  • Inventory: Up a big 57.8% — supply has increased significantly. Bidding wars are waning. This will slow the rate of home appreciation.
  • Average Days on Market (DOM): Down 11.1% (from 27 to 24 days) — homes are selling slightly faster despite higher inventory, suggesting continued demand.

Prices & Valuation:

  • Average Sale Price: Up 6.7% ($2.44M ➡️ $2.61M) — strong upward pressure on prices.
  • Median Sale Price: Up 4.7% ($1.91M ➡️ $2M) — supporting the trend that the broader market, not just luxury homes, is appreciating.
  • Median $/SqFt: Up 3% — price growth per square foot is solid but more moderate, suggesting that larger homes might be contributing to the higher overall sale prices.
  • % List Price Received: Up from 104% ➡️ 107% — buyers are paying even more over asking, indicating competitive offers remain.

Volume & Sizes:

  • Total Sale Volume: Up 9.4%—Higher prices and slightly more sales have lifted the total dollar volume since sales only increased 2.6%.
  • Average Home Size: Up 2.5% (2055 to 2107 sqft) — larger homes selling might be nudging up average prices. If the average home price went up 6.7 % but 2.5% of that was due to larger homes selling, a YOY average sale price percentage would be reduced to 4.2%.

Market Dynamics:

  • Months of Inventory: Up 57.1% (from 1.4 to 2.2 months) — still a seller’s market (under 3 months), but it’s becoming more balanced due to buyer jitters.

Summary Insight:

The SMC housing market in 2025 looks like it’s in a hot but slightly more balanced phase:

  • Supply has risen sharply, but demand is keeping pace (homes are selling faster, prices are up, and bidding is competitive, just not as much so).
  • The increase in larger home sales might be boosting both the average sale price and the sales volume.
  • Inventory is building, which could give buyers slightly more leverage in the coming months if the trend continues.
  • Fed. interest rates remained unchanged.

Commentary: With all the uncertainty around tariffs, buyers are taking the classic “wait-and-see” approach — emphasis on the wait. One thing they’re sure of? Their stock portfolios took a hit… but hey, it’s only a loss if they cash out to buy that house, right? Yet another reason to stay on the sidelines a little longer and let the dust (and the Dow) settle.

The Risk Reward? Buy now while prices are climbing a little and bidding wars are catching their breath — or wait with the crowd for “more certain times” and join the stampede when the bidding starts up full throttle again.

Drew and Christine Morgan are experienced REALTORS and NOTARY PUBLIC located in Belmont, CA, where they own and operate MORGANHOMES, Inc. They have assisted buyers and sellers in their community for over 30 years. Drew and Christine have received the coveted Diamond award and ranked among the top 50 agents nationwide and the top 3 in Northern California by RE/MAX. To contact them, please call (650) 508.1441 or emailinfo@morganhomes.com.

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This article provides educational information and is intended for informational purposes only. It should not be considered real estate, tax, insurance, or legal advice; it cannot replace advice tailored to your situation. It’s always best to seek guidance from a professional familiar with your scenario.

BROKER | MANAGER | NOTARY