William Piotrowski, Just Call William 630-881-8655 (Diamond Residential Mortgage Corporation ) Mortgage and Lending



William Piotrowski
Just Call William 630-881-8655
location_on Naperville, IL — Diamond Residential Mortgage Corporation
Independent Brokerage
031.0016549 NMLS#219299
Get to Know William Piotrowski

 William Piotrowski is a Branch Manager and loan officer for Diamond Residential Mortgage.

Everything William does is about empowering others to find the right home for their family, future, and finances. He does this by working with everyone from first-time home buyers to more complex clients who don’t fit conventional lending profiles.

What makes William different is his accessibility to your family and how he listens to what you need at all points in the home buying process. You deserve a mortgage lender that empowers and works with your family.

For the last 18 years William has been recognized as a top lender in his region. Give him a call today at 630-881-8655 or send him an email at

See what others are saying about William

 “Wealth is what you accumulate, not what you spend”

Equal Housing Lender 


  • Causes William cares about:
  • Arts & Culture
  • Animal Welfare 
  • Children
  • Civil Rights & Social Action
  • Economic Empowerment
  • Education
  • Environment
  • Health
  • Human Rights
  • Disaster & Humanitarian Relief
  • Politics
  • Poverty Alleviation
  • Science & Technology
  • Social Services
What a beautiful home 1181 N Hillcrest Rd, Beverly Hills, CA 90210

Breathe California… Immerse yourself in a scenic wonderland of unparalleled beauty. Step out into your backyard and experience southern California the way you’ve always imagined. A sweeping panoramic view from downtown Los Angeles to the shores of Malibu Beach and everything in between. The mystique of Hollywood and the glamor of Rodeo Drive at your fingertips. A playground of endless opportunity and infinite potential beaming up at you with an irresistible allure. Be prepared to be inspired… At the top of Hillcrest Road sits a property unlike any other in Beverly Hills. At approximately 23,000 square feet, 1181 North Hillcrest is a masterwork in luxury composition and the sharpest possible detail. This is a collection of the world’s finest elements localized in a single setting. Every inch of this estate is outfitted with an unforgettable blend of style, comfort and quality. Our world-class creative team was charged with a mission: to develop a house that incorporates all the very best that California has to offer. This property thoroughly raises the bar for architecture and design in Los Angeles. It is a unique movement, a full redefinition of today’s luxury home. But it’s much more than just a home. It’s an open invitation. It’s time to make your mark in The City of Dreams.


What sets me apart is that I will provide concerned potential buyers and agents, who want to work with an honest mortgage advisor that will listen and create the perfect solution to their mortgage needs so that they can obtain the best program, the highest value and award winning service.



Specialties: Residential SalesLuxury Homes, and First-Time Home Buyers



I work with you Hand & Hand through your whole process and educate you as we proceed on your getting to the closing table.

My main concern is You. I love closing loans and making You 100% happy as we work together. 

Our mission, at Diamond Residential Mortgage Corporation, is to secure the best mortgage available for our clients. We will work diligently to find you the best possible terms, helping you achieve your financial goals in a friendly and professional manner. Our clients truly do come first and will be treated with the utmost respect and forthrightness. You will notice the difference from the initial consultation.

Diamond Residential Mortgage Corporation is committed to helping you find the right mortgage product for your needs. We understand that every borrower is different, and we offer a variety of products to meet your individual needs. We make the process of securing a mortgage simple and straightforward by offering you the latest financial tools that enable you to make sound financial choices.

My philosophy is this;

What sets me apart is that I will provide concerned potential buyers and agents, who want to work with an honest mortgage advisor that will listen and create the perfect solution to their mortgage needs so that they can obtain the best program, the highest value and award winning service.

Call me today (630)-881-8655 and ask how I can help you.

With Respect; 

William Piotrowski 
Originator License # 031.0016549 
N.M.L.S #219299

Dave and Catherine Hamilton
Fast response, great rates, excellent on time and efficient. William was a pleasure to work with. He answered all of our questions and made the closing easy to understand and performed it in a timely matter. Your business is better than going to a bank. Thank you for your help. Kate and Dave Hamilton
Michael Charicki
William and his team are awesome to work with! They are able to get things done that other lenders can't. If you have been turned away before, contact William. If he is not able to get it done, he will put together a plan and tell you exactly what you need to do. I highly recommend him, service is exceptional. Thank you!
Patrick And Kayla Donegan
William was available to us just about 24/7 and a quick text away which was helpful. To be completely honest, there were times that the texting got very overwhelming and frustrating, but now that we have closed on our home, I know he was doing what he could to keep us on schedule to fulfill our end of the bargain for purchasing the home from the seller; which was a quick close. William got us to closing in 15 BUSINESS DAYS which shocked us, our family, and our friends! Thank you for everything!!
Robert And Erika Alarid
William was so easy to work with. He was always available to promptly answer our questions and concerns. I highly recommend William and Diamond Residential Mortgage.
Jason Silver
William has helped me on my last 3 loans. He is amazing! Makes the loan process very easy and quick. Thanks Bill.
Greg Gordon
It was great working with William, you can tell he loves what he does. He the made the home buying process smooth as can be. Wiould recommend to family and friends!
Kendra Williams
He made us feel comfortable with all these big steps. He also was very trusting and helpful when confused about something.
Daniel Castrejon
William and Sherry are a phenomenal team! Very attentive and provide you with the best customer service!
Trevor Fischer
William made the process of getting our first home loan incredibly stress-free and easy. He thoroughly and patiently answered all of our questions and guided us through the steps we needed to make our dreams of buying a home come true. He worked with our busy schedules and always responded to our emails promptly and professionally. We would highly recommend William and his team to friends and family looking for a lender.
Bob Nelson
William Thank you for you expedient service with Stocco's. They are very pleased with service you provided. I'll bring your name up at our office meeting relating the 2 experiences I've had with you. It's always a pleasure working with a true professional. Once again thanks. Bob Nelson BPOR SFR ePRO
Slobodan Golubovic
Dear Brandy, I just want to thank you for your speedy reply on my inquiry about mortgage information and to tell you that in last 30 years I never had better mortgage service from any mortgage company then yours. You and William are complete wizards providing mortgage service to me, (in my absence) in speed and professionalism that I never experienced before. Anyone who is looking for mortgage service can depend on you and William and can trust that service will be done more than professional way. That said i will recommend your services and DIAMOND RESIDENTIAL MORTGAGE CORP.. services to anyone who is looking for honest and professional mortgage service. Best wishes to you and William from your , more than satisfied, client Slobodan Golubovic
Steven Feldman
Thank you so much you were a pleasure to work with and came through on every commitment. William and Brandi you guys rock! Thank you again!
Louis Jerel
Excellent service all the way around. DRMC did a very good job and got me the help I needed til the end. Me and my family are happy in our new home and we thank DRMC :)
spinlasvegas reviewed William Piotrowski 11/18/2014
The best in the business!
edreed516 reviewed William Piotrowski 11/19/2014
I recently sold my parent's home in an estate sale. William was the mortgage broker for the buyers. Throughout this process, I dealt with William via email and telephone on a weekly basis. He was always very professional and extremely helpful even offering advise to assist us with lower fees associated with selling the house. He returned calls and emails very quickly. I would definitely recommend William's services to friends and family (actually, I already have) and would use him myself.
Lonny Miller reviewed William Piotrowski 11/03/2014 Worked together as colleagues
Lonny Miller reviewed William Piotrowski 11/03/2014 Worked together as colleagues he handled the buyers financing for a deal where I was the Realtor representing the seller. he did a great job. there were a lot of small issues that can easily ruin a deal but he got them all handled and we were able to close on time. highly recommend
ggrossett reviewed William Piotrowski 11/03/2014 Currently working together
I have known William Piotrowski professionally for awhile, and he has always been open and honest. In addition, his responsiveness and dedication to open communication has been both refreshing and appreciated. On cases where we have worked together, he has constantly kept me in the loop and provided me with all the information I needed to provide our client with the high level of service we both strive to provide.
enortonesq 11/20/2014
William was wonderful to work with on this transaction. He is very responsive to emails and phone calls. He demonstrated extreme knowledge of the mortgage process all the way to the closing table. In fact, he made my job as a buyer's attorney very easy since he explained all the closing documents to our mutual client. This allowed me to focus on the legal aspects of the transaction. I would recommend him to potential homebuyers seeking financing. I sincerely look forward to working with him again in future transactions

I am always happy to help you or someone you know Buy, Sell or Lease your next home. Remember, Experience Isn't Expensive - It's Priceless! Contact me today.