The Nest Weekly — August 31, 2026
Week of August 31, 2026 | From Kaveh Sartipi, Nest Mortgage — Danville, CA
Two Markets, One Median
The nine-county Bay Area median sale price fell 1.2% year over year in July.
Seven of the nine counties went up.
Both of those are true, they come from the same table in the same report, and the space between them is the most useful thing in this week's data.
Rate Snapshot
| Product | Current Market Average | Prior Week | Direction |
|---|---|---|---|
| 30-year fixed (conforming) | 6.66% | 6.65% | Flat |
| 15-year fixed | 5.98% | 5.95% | Flat |
Rates as of August 31, 2026 — subject to qualification. Current rates posted at NestMortgage.ai/rates.
Source: Freddie Mac Primary Mortgage Market Survey, national weekly average, week ending August 27, 2026.
Two different year-over-year comparisons are circulating right now, and they point opposite directions. Both are correct. They just measure different windows.
On a weekly basis, the 30-year is running slightly above where it sat a year ago — 6.66% this week against 6.56% the same week in 2025. On a monthly average basis, July 2026 came in at 6.54%, down from 6.72% in July 2025. So: modestly higher week over week against last year, modestly lower month over month against last year. Neither gap is large enough to change anyone's decision.
For the record, the high-water mark for 2026 was 6.69% on August 6. We are ten weeks into a market that has traded inside a range of roughly a quarter point.
What that means for a Bay Area borrower is that rate movement is no longer the variable deciding whether your deal works. Structure is. Loan type, down payment, how the income is documented, whether a buydown or an ARM fits your actual holding period, whether jumbo or conforming high-balance prices better at your loan amount. Those choices are moving payments more than the weekly print is.
Current rates are published on NestMortgage.ai/rates and update regularly. Subject to qualification.
The Market: Why the Regional Median Lies
Here is the July county table, and it is worth reading slowly.
| County | July 2026 Median | Change vs July 2025 |
|---|---|---|
| San Francisco | $2,050,000 | +25.2% |
| Marin | $1,770,000 | +8.9% |
| San Mateo | $2,210,000 | +5.2% |
| Santa Clara | $1,955,000 | +2.9% |
| Solano | $610,000 | +2.7% |
| Alameda | $1,275,000 | +2.0% |
| Contra Costa | $875,000 | +1.4% |
| Sonoma | $840,000 | −0.6% |
| Napa | $885,000 | −4.3% |
| Nine-county region | $1,285,000 | −1.2% |
Source: California Association of Realtors, July 2026 Home Sales and Price Report, median sale price of existing single-family detached homes, July 2026 versus July 2025. Released August 2026.
Seven counties up. The region down. That is not a contradiction, it is arithmetic.
The regional median is not an average of county prices. It is the middle of every sale that closed, so it moves when the mix of what sold changes. Bay Area sales fell 11.1% from June, and San Francisco alone — the single most expensive county in the state — saw closings drop 33.3% month over month. Pull enough two-million-dollar sales out of the pool and the middle of the pool drops, even while every individual county gains value.
The regional median tells you what sold. It does not tell you what your house is worth.
If you want the second measure, Case-Shiller's repeat-sales index for the San Francisco metro division was up 3.2% year over year in June, released August 25. That index tracks the same homes selling twice, so it is immune to mix shift. Median down, repeat-sales up. Both real, measuring different things.
Inventory: The Split Is Geographic
The genuine divide this summer is not luxury versus entry level. It is inner Bay versus outer ring.
| County | Months of Supply | Median Days to Sell |
|---|---|---|
| San Francisco | 1.0 | 22.5 |
| San Mateo | 1.5 | 13 |
| Santa Clara | 1.9 | 13 |
| Alameda | 2.0 | 15 |
| Contra Costa | 2.6 | 15 |
| Solano | 3.1 | 42.5 |
| Sonoma | 3.4 | 62 |
| Napa | 6.8 | 66 |
| Nine-county region | 2.3 | 22 |
Source: C.A.R., July 2026 Unsold Inventory Index and median time on market, existing single-family detached homes. Regional and county figures not seasonally adjusted.
The Bay Area is the tightest region in California at 2.3 months, against 3.4 months statewide. But inside it, Napa sits at 6.8 months and takes 66 days to sell a house while San Mateo sits at 1.5 months and takes 13. Those are not the same market and no single number describes both.
The East Bay is squarely in the tight half. Alameda at 2.0 months and Contra Costa at 2.6, both selling in about 15 days, both tighter than they were a year ago — Contra Costa has come down from 3.1 months last July.
Supply is not loosening. Statewide active listings are down 9.3% year over year, the sixth straight month of annual declines, and 42 of California's 53 counties have fewer listings than a year ago. San Francisco leads the state with active listings down 41.5%.
Two things worth watching over the next three weeks. Inventory did tick up 2.9% from June, and the post-Labor Day listing wave is about to arrive. That is the only window this fall where buyers get meaningful choice.
What To Do About It
For buyers: Get fully underwritten now, before the September listings hit. Not prequalified. Underwritten. When homes in Alameda and Contra Costa are selling in about fifteen days, a buyer with a documented file and a firm number is far better positioned in a competitive offer situation than one who is still gathering W-2s. And stop shopping the regional median. Pull the comps for your county and your price band, because those are the only numbers that describe the house you are actually bidding on.
For sellers: Statewide, homes sold at 99.3% of list in July, up from 98.5% a year ago, and the typical California home took 26 days to sell, down from 28. That is a market rewarding correct pricing, not aggressive pricing. If you are in Alameda or Contra Costa you are in a two-month-supply market and should price with confidence. If you are in Napa, Sonoma, or Solano you are competing against three to seven months of standing inventory and buyers with no urgency, and your first three weeks on market are the only three weeks that price like new.
The honest read: this is a boring rate market attached to a genuinely interesting inventory market. Most people are watching the wrong one.
Kaveh Sartipi | Mortgage Broker & Advisor | Nest Mortgage
925.718.0700 | Kaveh@MyNestMortgage.com | NestMortgage.ai
100 School Street, Danville, CA 94526
As a broker, I shop a wholesale lender network on your behalf rather than selling one bank's menu. If you want the numbers run on your specific scenario, reply to this or call.
Kaveh Sartipi | NMLS# 247776 | DRE# 01363588 | Answer Home Loans, Inc. is a Licensed Real Estate Broker, California Department of Real Estate DRE# 02058505 | NMLS# 1729528 | Equal Housing Lender. This is not a commitment to lend. All loans subject to credit approval, underwriting, and program guidelines. Rates and terms subject to change without notice.
Kaveh Sartipi
Mortgage Advisor · NMLS# 247776 · Top 1% Nationally
Kaveh Sartipi is the founder of Nest Mortgage and has been helping Bay Area buyers finance their homes since 2001. With access to 70+ wholesale lenders, he specializes in finding the right loan for each client's unique situation.