Bay Area Jumbo Mortgage Rates 2026 — Marin County, San Francisco, and East Bay

I’m Michael DiVita — DRE #01372066 | NMLS #241655, DiVita Home Finance (DRE #01818285 | NMLS #323700), Tiburon, CA. I’ve been in California mortgage lending since 2000 and founded DiVita Home Finance in 2007. Call (800) 239-1103.

Bay Area mortgage rates in 2026 are being shaped by one dominant fact: most homes in Marin County, San Francisco, and the South Bay cost more than the applicable high-balance conforming limit — the threshold above which loans become jumbo. That single factor is why Bay Area buyers see rates 0.25%–0.50% higher than what national rate sites advertise, and why working with a lender who specializes in jumbo products matters more here than almost anywhere else in the country.

Here’s a county-by-county breakdown of what’s driving rates and what buyers can expect in the Bay Area’s most active markets.

Bay Area Conforming Loan Limits for 2026

Bay Area counties each have their own 2026 high-balance conforming limit, set by FHFA based on median home prices. Loans above these limits are jumbo:

Marin County Jumbo Mortgage Rates 2026

Marin County has the highest median home prices in the Bay Area. Mill Valley, Tiburon, Ross, Kentfield, and Belvedere regularly see sales above $2 million — often well above $3 million for waterfront and view properties. For most Marin buyers, a 20% down payment still leaves a loan of $1.1M–$2.5M, firmly in jumbo territory above the $1,249,125 high-balance conforming limit.

Current Marin County Jumbo Rate Ranges

Marin buyers frequently use bridge loans in combination with jumbo purchase mortgages — particularly in the move-up market. A Mill Valley family selling a $1.8M home to buy a $2.5M home in Tiburon might use a bridge loan for the down payment on the new home, make a non-contingent offer (critical in Marin’s competitive market), then pay off the bridge once their existing home sells. See our Marin County bridge loan guide for specifics.

Marin-Specific Rate Considerations

Fire zone: Much of unincorporated Marin County — including San Geronimo Valley, Stinson Beach, Bolinas, Inverness, and parts of Mill Valley — is in Tier 1 or Tier 2 Very High Fire Hazard Severity Zones. Insurance availability affects both qualifying ratios and some lenders’ risk appetite. Work with a lender who regularly closes fire-zone loans in Marin. See our guide to Marin County fire zone mortgages.

Trust and LLC vesting: Many Marin buyers hold title in living trusts or family LLCs for estate planning. Most conventional and jumbo lenders allow trust vesting with minimal documentation, but it adds a step. Confirm your lender has experience with this before application.

San Francisco Jumbo Mortgage Rates 2026

San Francisco is the most complex mortgage market in California, combining high home prices, significant condo inventory, a large self-employed tech workforce, and a move-up market where buyers frequently own in the city and want to move to Marin or the Peninsula. SF’s 2026 high-balance conforming limit is $1,249,125 — meaning buyers with 20% down need loans above $1.25M to be in jumbo territory.

SF Condo Rates vs. Single-Family Rates

In San Francisco, condos and TICs (tenancy-in-common) add rate layers that don’t exist for single-family homes. Warrantable condos (Fannie/Freddie eligible) run 0.25%–0.375% above single-family rates at the same loan amount due to standard condo pricing adjustments. Non-warrantable condos (investor concentration above 35%, HOA litigation, etc.) require non-QM portfolio financing at rates 0.75%–1.25% above single-family equivalent. TIC fractional loans are specialty products at rates typically 0.75%–1.50% above comparable condo rates, with maximum LTV of 70%–75%.

SB 326 compliance status is now a factor in condo financing. Buildings with deferred balcony or elevated walkway repairs, or whose HOAs have not yet completed SB 326 inspections, may not qualify for conventional financing. Learn more in our SB 326 condo financing guide.

East Bay Mortgage Rates 2026

The East Bay — Alameda and Contra Costa counties — offers the most accessible price points for Bay Area buyers, with median prices in the $850K–$1.1M range. Alameda and Contra Costa each have a 2026 high-balance conforming limit of $1,209,750. This means many East Bay buyers can stay in high-balance conforming territory, accessing agency-backed rates instead of jumbo pricing.

Oakland, Berkeley, Piedmont, and Walnut Creek buyers with 20% down on a $1.1M purchase borrow $880,000 — high-balance conforming. That’s a meaningful rate advantage over a Marin buyer on a $1.5M purchase with 20% down ($1.2M loan, jumbo above Marin’s $1,249,125 limit).

How to Get the Best Jumbo Rate in the Bay Area

Work with a broker, not a single lender — jumbo pricing varies significantly across portfolio lenders and private investors. A broker placing loans across 10+ jumbo investors will find better pricing than a single bank. Aim for 760+ credit score — both the rate itself and the amount of reserves required may improve above 760. Consider an ARM — 7/1 ARMs are 0.50%–0.75% below 30-year fixed and are common for Bay Area buyers who expect to sell or refinance within 7 years. Pre-qualify before house hunting — jumbo pre-approval requires more documentation than conforming; starting early prevents delays when you find the right home.

For current rate ranges across all loan types, see our California Mortgage Rates 2026 guide. DiVita Home Finance specializes in Bay Area jumbo lending across Marin County, San Francisco, and the East Bay.