San Mateo County Conforming Loan Limits 2025

The 2025 high-balance conforming loan limit for San Mateo County is $1,209,750.

The 2025 “low-balance” conforming loan limit for San Mateo County is $806,500.

• Both loan limits above are based on a 1-unit property.

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Loans between $806,500 and $1,209,750 for a 1-unit property in San Mateo County are considered high-balance conforming loans.  High-balance loans tend to have slightly higher interest rates and slightly tighter qualifying guidelines compared to loans under the low-balance limit of $806,500.  With a high-balance loan, you can put as little as 5% down, and the entire down payment can be a gift.

If you can keep your loan under $806,500, you will be rewarded with a lower interest rate and payment.  Also, you can put as little as 3% down, and the entire down payment can be a gift.

First-time home buyers purchasing a home in San Mateo County may qualify for lower rates and costs by waiving Loan Level Pricing Adjustments or LLPAs if their gross annual qualifying income is $199,920 or less.

Loans above $1,209,750 for 1-unit properties in San Mateo County are considered jumbo loans. Jumbo loans can have more difficult qualifying requirements, such as mandatory reserve funds and lower maximum debt-to-income ratios.

Below are the high-balance conforming loan limits for 2 to 4-unit properties in San Mateo County…

• 2-unit property – $1,548,975
• 3-unit property – $1,872,225
• 4-unit property – $2,326,875

You can secure a lower interest rate and put as little as 5% down on a primary residence if you keep your loan amount under the “low-balance” limits for 2 to 4-unit properties in San Mateo County.

Below are the “low-balance” conforming loan limits for 2 to 4-unit properties in San Mateo County:

• 2-unit property – $1,032,650
• 3-unit property – $1,248,150
• 4-unit property – $1,551,250

Click Here for FHA Loan Limits for San Mateo County 2025

If you are looking for a purchase loan or a refinance in San Mateo County, we would love to work with you! We can close a purchase loan in as little as 10 days and refinances in 15 days.  You won’t find a lower rate and better service than Community First Mortgage.

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(Rates subject to change without notice)

Loan Assumptions