Guarantee Mortgage - San Francisco, 505 Montgomery

We have helped Bay Area families finance their home purchase, with over $2 billion in loans annually, and we can help you.

Offering a wide range of products and services, Guarantee Mortgage is well prepared to meet every real estate lending need.

We have 22 years under our belt providing world-class client service. Our top priority is to make sure you are presented with all available loan options, so that you can make an informed decision, that’s right for your financial situation.

http://www.guaranteemortgage.com

Guarantee Mortgage NMLS #1850 and CAL-BRE License #01215943

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Recommendations (1038)

Sep 10, 2019

Cristin H. recommends Aisling Ferguson

Aisling was amazing. I have been in the process of purchasing a home in SF (while being in Europe) and Aisling was a phenomenal support in the process. She has a sense of urgency, is clear in her asks and does whatever it takes to get the job done in a way that makes her clients feel good. Simply put, she was my advocate and I look forward to working with her again in the future.
Sep 9, 2019

Anonymous recommends Kathy Derangi

Kathy was great to work with and we highly recommend Kathy.
Sep 5, 2019

Elliot Morrison recommends Orlando Diaz

Financing has never been as easy and pain free as the 2 refis we did with Orlando. Highly recommended!
Aug 25, 2019

Troy Onorato recommends Ken Dean

Founder Hat Trick Racing

Ken was professional and went the extra mile to explain the process and get us the best loan possible.
Aug 23, 2019

Rose Cage recommends Kevin Casey

Multi Use Building owner

Kevin is seriously, the best.

I would recommend him highly, and will definitely use him on my next transaction.
Aug 12, 2019

Tom Sweeney recommends Kathy Derangi

Home Owner

I asked Kathy about a home equity line of credit and she recommended a home refi at a lower rate.
I have purchased and refinanced several homes over the decades and Kathy was great.
She communicated with me on a regular basis, some times two or three times a day.
She was professional, knowledgeable and friendly through the whole process.
I will use her again and highly recommend her.
Aug 9, 2019

Jeff Wong recommends Kathy Derangi

Environmental Health and Safety

I couldn't be happier and more thankful for the support and services Kathy provided to our family towards the purchase of our new home. Initially, she was very responsive and provided a clear table for what our purchase options were at various levels; this was immensly helpful for my wife and I in forecasting projected expenses. Once we got the ball rolling, Kathy was on top of it and was diligent in following up on critical items and providing reminders along the way which kept us on track. It was clear throughout the process that she had our best interests in mind. We will certainly be using Kathy again in the future and recommend her to anyone who is out there looking for a new house. Thanks for everything Kathy!
Aug 8, 2019

Sarah Lacy recommends Aisling Ferguson

CEO

Aisling has helped me out of nearly impossible mortgage situations twice. Her patience, attention to detail and resourcefulness are unparalleled. Everyone who has been part of these transactions has absolutely raves about her. I’ll never work with anyone else. It’s strange when you have more loyalty to a mortgage broker than, say, your hairdresser but that’s absolutely the case for me with Aisling!
Aug 7, 2019

Racelle LaMar recommends James W. Argo

Doctor of Veterinary Medicine

Wow. Jim and his team really went the extra mile for me. My loan was a bit 'out of the ordinary' and had quite a few moving parts.
Their ability to get the deal done was amazing, their communication outstanding, and I was quite pleased to work with them.
I recommend James W. Argo for your mortgage needs.
Aug 7, 2019

Yvette Fawzi recommends Mireille Costandi

We have done several loans/ refi with Mireille. She is thorough and meticulous and everything always goes smoothly. She works hard to do the very best for you. You are in good hands.
Aug 7, 2019

Julie Keshmiry recommends James W. Argo

Chief of Staff

A loan process can be unclear and painful but James expertly helped us navigate this. He was incredibly responsive, always on top of the meticulous steps. He also guided us with sound advice along the way. I would highly recommend him.
Aug 7, 2019

Anonymous recommends Kathy Derangi

Kathy was super organized, wonderful at breaking everything down for us and communicating, and overall easy to work with. Highly recommend her!
Jul 31, 2019

Paul Carr recommends Aisling Ferguson

To say Aisling did an amazing job is a huge understatement. When we called her we had just been let down by our previous broker right in the middle of trying to buy our dream house. Not only was Aisling able to get us the loan we needed, at a great rate, but she also dealt quickly and professionally with escrow, insurance and all the other parts of a complicated transaction. If you're buying a house in the Bay Area or any other part of California (we were in SF, but buying in Southern California) Aisling should be your first and only call. She will fight for you.
Jul 23, 2019

Don L. recommends James W. Argo

Attorney

Jim did a great job advising us and managing our situation which required some extra steps due to the July 4th holiday. Can't provide enough high praise about the level of professionalism and service one can expect from Jim.
Jul 22, 2019

Diana recommends Fe David

Fe was great to work with. She made herself available any time of day to answer any questions. She kept me up to date throughout the entire process which was greatly appreciated.
Jul 22, 2019

Heidi recommends Joel Marks

Great mortgage broker! I highly recommend Joel for any mortgage needs!
Jul 17, 2019

Scott Turner recommends Aisling Ferguson

Aisling once again hit it out of the park in terms of the incredible service she provided in getting us a mortgage for our new home. She deftly helps everyone navigate a very complicated system, and is tenacious in solving any obstacle that might get in your way. Don’t think about going anywhere else for a mortgage. She’s the best!
Jul 11, 2019

Tonya Rice recommends Aisling Ferguson

Tonya Rice

Aisling was exceptional and my husband and I cannot recommend her enough. Her detailed, rapid and organized responses and direction guided us through the process of our loan seamlessly. She is truly a pleasure to work with as well as a dependable and honest professional.

Tonya and Rick Anderson
Jul 11, 2019

Tom Burns recommends James W. Argo

James made the whole process
seamless and easy.
Jul 8, 2019

Darolyn Davis recommends Ken Dean

I would recommend Ken to anyone who is seriously looking for a home loan. I have worked with Ken on several home loans. He has made this daunting process so much easier. He is efficient, thorough, patient and helpful. He’ll tell you exactly what is needed and guide you through every step along the way. Most importantly we will find you the best most cost efficient loan available. I really appreciate the fact that he will shop around to find the loan that finds your needs.
Jul 3, 2019

Bart Jones recommends Aisling Ferguson

Property Manager

Aisling was able to find a loan for a difficult and complicated project that had a critical deadline. Two other lenders were unable to do it. I am so happy we found her! She was fast, communicated throughout, and even fun work with.
Jul 3, 2019

Bart Jones recommends Aisling Ferguson

Property Manager

Aisling was able to find a loan for a difficult and complicated project that had a critical deadline. Two other lenders were unable to do it. I am so happy we found her! She was fast, communicated throughout, and even fun work with.
Jul 3, 2019

Ravi Malhotra recommends Aisling Ferguson

Real Estate Agent with Zephyr Real Estate

I just closed a deal with Aisling Ferguson. I have been selling real estate for 20 years and working with Aisling was one of the best experiences I have had. She is extremely diligent and professional. She is focused on the client's needs and offered a high touch level of service. I never had to wonder about the progress of our clients loan as she was prompt to respond to questions and kept me well updated throughout the process. I hope I have the pleasure of working with her again in the future.

Ravi Malhotra
ZEPHYR REAL ESTATE
DRE #01252344
Jul 3, 2019

Tricia McGillis recommends Aisling Ferguson

Graphic designer

Aisling is a superstar. She has handled four loans for us, and we can’t imagine using anyone else. She is responsive, knowledgeable, friendly, and on top of it all. So glad we found her!
Jul 2, 2019

John Kimsey recommends Pov Oum

Home Owner

Pov was excellent! This is the second time I’ve used her and she was A +++ both times. She’s very attentive to details, thorough in explaining items and she’s really cares that you achieve the optimal end result. I highly recommend her and I send all my friends to her. Very satisfied!

Our Team

  • Aisling Ferguson

    NMLS #280915 Loan Consultant - San Francisco
    NMLS #280915 / 1850 - CA BRE #01225420 / 01215943

  • Orlando Diaz

    Sr. Loan Consultant - San Francisco - Montgomery St.
    NMLS #238849 / 1850 - CA BRE #01475255 / 01215943

  • Foster Weeks

    Loan Originator - San Francisco - Montgomery St.
    NMLS #253370 / 1850 - CA BRE #01383598 / 01215943

  • Kathy Derangi

    Loan Consultant - San Francisco - Montgomery St.
    NMLS #1151839 / 1850

  • James W. Argo

    Senior Loan Officer - San Francisco - Montgomery St.
    NMLS #257031 / 1850 - CA DRE #00869591 / 01215943

  • Natasha Lovas

    Senior Mortgage Advisor - San Francisco - Montgomery St.
    NMLS #239455 / 1850 - CA BRE #01161948 / 01215943

  • Larry Horowitz

    Loan Consultant - San Francisco - Montgomery St.
    NMLS #239001 / 1850 - CA BRE #01003870 / 01215943

  • Robin Patronik

    Senior Loan Officer - San Francisco - Montgomery St.
    NMLS #241087 / 1850 - CA BRE #01347330 / 01215943

  • Ken Dean

    Loan Consultant - San Francisco - Montgomery St.
    NMLS #237940 / 1850 - CA BRE #0902556 / 01215943

  • Allan McAllister

    Loan Consultant - San Francisco - Montgomery St.
    NMLS #280540 / 1850 - CA BRE #01372084 / 01215943

  • Kevin Casey

    Loan Consultant - San Francisco - Montgomery St.
    NMLS #238192 / 1850 - CA BRE #01178612 / 01215943

  • Cecelia Tyeskey

    Reverse Mortgage Specialist - San Francisco - Montgomery St
    NMLS #239861 / 1850 - CA BRE #01212004 / 01215943

  • Pov Oum

    Loan Officer-San Francisco-Montgomery St.
    NMLS # 1226687 / 1850 - APMC CA BRE #01215943

  • Risa J. Meyer

    Mortgage Specialist - San Francisco - Montgomery St.
    NMLS #332214 / 1850 - CA BRE #01126851 / 01215943

  • Ming Leong

    Loan Consultant - San Francisco - Montgomery St.
    NMLS # 252471 / 1850 - CA BRE #01369831 / 01215943

  • Mireille Costandi

    Loan Consultant - San Francisco - Montgomery St.
    NMLS #249322 / 1850 - CA BRE #01132350 / 01215943

  • Joel Marks

    Loan Advisor (NMLS: #216888/1850)

  • Bob Siefert

    Senior Vice President - San Francisco - Montgomery St.
    NMLS #55105 / 1850 - CA BRE #00921214 / 01215943

  • Amy Lai

    Loan Consultant - San Francisco - Montgomery St.
    NMLS #341535 / 1850 - CA BRE #01795977 / 01215943

  • Fe David

    Loan Consultant - San Francisco - Montgomery St.
    NMLS # 482592 / 1850 - APMC CA BRE #01215943

  • Paul Rea

    Loan Consultant - San Francisco - Montgomery St.
    NMLS #280163 / 1850 - CA BRE #00856755 / 01215943

  • KC Murphy

    Sr. Loan Consultant - San Francisco - Montgomery St.
    NMLS #255492 / 1850 - CA BRE #1007053 / 01215943

  • Sally Adam

    Loan Consultant - San Francisco - Montgomery St.
    NMLS #245703 / 1850 - CA BRE #01244582 / 01215943

  • Sheila Wood

    Manager/Loan Consultant - San Francisco - Montgomery St.
    NMLS #253742 / 1850 - CA BRE #00824166 / 01215943

  • Mark Wiener

    Loan Officer - San Francisco - Montgomery St.
    NMLS # 246293 / 1850 - APMC CA BRE #01215943

  • Tra Thach

    Loan Consultant