Welcome to Guarantee Mortgage

For 20+ years, Guarantee Mortgage has been helping California families finance their homes and navigate the intricacies of financing real estate in California.


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What sets us apart

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Customer Reviews

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What Sets Us Apart

Getting a mortgage is a big deal. Your choice of a mortgage lender should be too. Guarantee Mortgage has a well-earned, established reputation. Find out why we’re different, and why that difference will matter to you.

Why use a Mortgage Banker

What are the benefits of using a mortgage banker?

Unlike a bank, which is limited to offering you mortgages from its product line only, a mortgage banker can offer you multiple loan options from multiple lenders, many of which you’d likely not have known about.

With so many confusing mortgage options and offers to choose from, and with the constant refrain of “Lowest rate! Lowest rate!” echoing across the Internet, it’s no wonder many homebuyers choose to work with a mortgage banker who has the ability to shop your loan request to many lenders locally and nationwide.

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Gordon did an incredible job with my first home purchase! As a single, small business owner with massive student loan debt, I was anxious about my chances of finding a place in a competitive housing market. However, Gordon’s knowledge, thoroughness, responsiveness, and patience made this process refreshingly smooth and worry-free.
Michael H.

Loan Advisor: Gordon Friedman

From my first phone call to the closing of our refinance I appreciated Eric’s professionalism; his knowledge and quick response are top notch. He answered every call, text or email timely and explained our options. It was a pleasure to work with him!
Valerie R.

Loan Advisor: Eric Fairfax

The refinance I had to do was complex and large amount (for me). We started the process at beginning of year and of course the pandemic struck. It slowed everything down and throughout it all , Aisling kept me updated and remained accessible, patient and informative. We recently got the new loan approved ! Thank you so much Aisling!
Olga T.

Loan Advisor: Aisling Ferguson

I’ve done about 5 refi’s with Joel and he comes through every time with the best rates. He takes the time to explain everything and is dependable, trustworthy and easy to work with. I love his no fee approach. I highly recommend him. I’ve had many friends use him and they’ve all said the same thing.
Beth L.

Loan Advisor: Joel Marks

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Contact Us

(415) 441-5050


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Burlingame Office

851 Burlway Road, Ste. 501
NMLS #1194346
Burlingame, CA 94010
Main: 650.239.4004 | Fax: 650.375.1190

Corte Madera

300 Tamal Plaza, Suite 250
NMLS #1442693
Corte Madera, CA 94925
Main: 415.891.8706 | Fax: 415.945.8955

San Francisco: Financial District

505 Montgomery Street, Suite 1275
NMLS #1194365 and NMLS #1194437
San Francisco, CA 94111
Main: 415.441.5050 | Fax: 415.441.5047


232 Townsend St.
NMLS #:1194346
San Francisco, CA 94107
Main: 650.212.5050 | Fax: 650.403.1601

Walnut Creek

1535 N Main St., Ste 200
NMLS #1833640
Walnut Creek, CA 94596
Main: 925.788.1351