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Serving DC, Florida, Maryland, and Virginia

One of the most distinguished teams on the DC scene. Throughout their combined 40+ year career and 1.5 billion dollars sold, the McFadden name has become synonymous with expertise and superior results, best-in-class service, and an unyielding dedication to his clients.

Thanks to Mark’s and Hunter’s unrivaled work ethic, negotiating prowess, and vast market knowledge, he has earned the trust of buyers and sellers alike throughout the greater DC region.

  • DMV Natives
  • Recognized every year in Real Trends
  • Washingtonian Best Agents
  • Arlington-Bethesda Magazine
  • Compass Top Team of Two


Latest News

Massive Georgetown mansion Halcyon House has traded hands to a residential buyer after the namesake nonprofit startup accelerator it housed for more than a decade completed its move to another part of D.C. this week.

Prospect Street NW LLC — the identity of which was not immediately clear — has acquired the more than 30,000-square-foot property at 3406 Prospect St. NW for $28 million from Halcyon Georgetown LLC.

The seller is an affiliate of Sucampo Pharmaceuticals Inc., co-founded in 1996 by Dr. Sachiko Kuno and her ex-husband Dr. Ryuji Ueno, which acquired the Georgetown mansion in 2012 for $11 million from Prospect Associates, deed records show. Ueno’s holdings in the affiliate remain unclear following his divorce from Kuno.

The property’s 2025 assessed value is $15 million. Kuno was represented by Compass’ Mark and Hunter McFadden. TTR Sotheby’s represented the buyer.

The house served as the home to business development group Halcyon, which Kuno and Kate Goodall founded as an incubator in 2014 before turning it into a nonprofit in 2017. Goodall served as its CEO until 2024, when she launched Halcyon Venture Partners as a spinoff investment arm.

On Monday, Halcyon completed its relocation to a smaller WeWork space at 1100 15th St. NW, which a spokesperson previously said would allow Halcyon to better serve startups in more cities.

“I’m grateful to have been a steward of such a special property for 15 years, and for it to have done so much good for entrepreneurs in D.C. and around the world,” Kuno told us in an email. “I’m also proud to continue to support Halcyon Accelerator in their new home in downtown D.C.”

Halycon first announced it would vacate its namesake mansion in July as part of Kuno’s “succession planning vision,” the details of which have not been fully unveiled.

The move also coincided with a planned change in strategy for Halcyon, which is expanding the focus of its business support and development resources to better accommodate emerging companies globally instead of focusing on those that can locate to D.C. for multimonth, in-person residencies.

The Halcyon House was built in 1787 by the first U.S. secretary of the Navy, Benjamin Stoddert. It is located in the heart of Georgetown, and at one point was owned and expanded by Mark Twain’s nephew, Albert Clemens.

Word of the final sale of Halcyon House comes the same day Goodall posted on LinkedIn that she is joining forces with Kuno again on a project that involves Kuno’s S&R Evermay Foundation, the renamed S&R Foundation. The project is called Embassy of the Future.

“We will host fellows and events all focused on our world a decade from now, with the goal of connecting wisdom to the profound opportunities before us,” Goodall wrote.

Open for Business Anytime, Anywhere , at Any Price.

McFadden Partners Exclusive!

Compound Outside Washington, D.C.

2815 Woodland Dr NW

Washington, DC 20008
5 BD | 7 BA | 2 1/2 BA
List Price: $13,500,000

1538 Forest Ln

McLean, VA 22101
7 BD | 6 BA | 1 1/2 BA
List Price:
$4,499,000

1404 N Hudson St

Arlington, VA 22201
7 BD | 8 BA 
List Price: $4,250,000

1881 N Nash St 2309

Arlington, VA 22209
3 BD | 3 BA | 1 1/2 BA

List Price: $3,450,000

407 Independence Ave SE

Washington, DC 20003
4BD | 3 BA 

List Price:
$2,250,000

800 25th St NW 605

Washington, DC 20037
2 BD | 2 BA 
List Price: $999,500

1858 California St NW 5

Washington, DC 20009
1 BD | 1 BA 
List Price:
$549,000

1645 International Dr 121

McLean, VA 22102
2 BD | 2 BA 
List Price:
$410,000

Featured Property

9112/9120 MINE RUN DRIVE
Great falls

$14,000,000 | 8 BD | 10 BA | 2 HB |

Nestled on 5.44 acres near Great Falls Park, this estate blends old-world craftsmanship with modern luxury. A gated drive leads to the stately Manor, featuring Swarovski crystal chandeliers throughout. The property also offers a charming Guest Cottage, expansive wine cellar, elegant gardens, fountains, and timeless architectural details.

Mark McFadden | Hunter McFadden

mark.mcfadden@compass.com | 703.216.1333

Kind Words

They made the entire process painless…

“We recently listed and sold our house using the McFadden Partners. They were extremely helpful in preparing our home to be listed for sale. They made the entire process painless and couldn’t be more professional. I would highly recommend them to anyone wanting to sell their house!”

Vickie T.

No detail is too small…

“We just completed our third transaction with McFadden Partners over the last 20 years. Mark, Hunter and Lyn are consummate professionals. No detail is too small for them to handle and bottom line they get the job done when others can’t. Highly recommend their team.”

Tommy T.

Professional advice…

“We were very pleased with the smooth selling of our McLean home. Grateful for the professional advice, help, and support we received in preparing our home for sale, listing, and selling in a short time. We appreciated the dedication, promotion, and handling of the sale and were very happy that we followed the advice of our friends and contracted the McFadden’s services to obtain our goal.”

Luis and Lilliam A.

Top notch service…

“We met Hunter at an open house and were immediately impressed with his professionalism. He assisted in listing our home, and provided top notch service. After receiving a full price offer in one day, he was in constant contact with me to keep the process moving along. He answered every email/text within a few hours, and was diligent in following through with any open items. We appreciated this close working relationship at what can become a stressful time. We feel comfortable recommending Hunter to anyone. Thank you Hunter for all your help!”

Ralph and Katie L.

They make the whole process so fun…

“Mark, Hunter, and Lyn helped me find an amazing home for myself and now college age daughters in another great DC neighborhood. I wouldn’t hesitate to recommend the McFadden Group to anyone wishing to move to DC — they are well connected, and know the neighborhood so well, and are such a pleasure to work with. They make the whole process so fun!”

Kathy R.

Good results for reasonable fees…

“If you are in McLean & in the over $2 million range, the McFadden’s are definitely the way to go. Good results for reasonable fees. Their recommendations on everything were right on point. They provide people to come in and do whatever was necessary with no heavy lifting for us. They gave us excellent reasons for their suggestions, and further educated us about the market in our price range. Our only regret is that we wasted months with the wrong realtors. Hearty recommendation from us. They have their fingers firmly on the pulse of McLean real estate.”

Melinda K.

Made everything effortless…

“The McFadden team made what is often a daunting process easy and enjoyable. They were personal and made me feel like I was their only client. What a testament to their hard work, understanding, and expertise. I know there was quite a bit a work behind the scenes, but they made everything effortless and easy for me. I’m incredibly impressed and will definitely call again when we start looking for a house.”

Beth A.

Supportive, Professional, and Enthusiastic…

“HIGHLY recommend! Mark’s expertise combined with their supportive, professional, and enthusiastic approach made a stressful transaction so much less so. McFadden Partners did a fantastic job showcasing and marketing our property. The care and work ethic shined through. We can’t thank them enough.”

Carriellen B.

They fought for us…

“We would highly recommend McFadden Partners for any and all of your real estate needs! They represented us as the seller and did a superb job. The attention to detail, work ethic, and ability to oversee all aspects of the sale was impressive. They fought for us and got us the highest possible price for our property, all while managing very challenging buyers with extensive requests. We couldn’t be happier with the results of our partnership. They are really the best agents that we have ever worked with.”

Cheryl P.

Tireless advocates…

“The McFadden Partners are truly an example of consummate professionals who love what they do and do what they love. They are tireless advocates of their clients and leave no stone unturned when it comes to finding the right property. We definitely would recommend them.”

Tony J.

Top professionals…

“If you are looking for top of the heap, best in show, head over heels above others, Mark McFadden comes to mind. He is an exceptional listener, exquisitely charming, and has a remarkable levity which makes the once overwhelming process delightful! He and his team are top professionals, hands down, best of the best in the business. Mere words cannot express the magnitude of what Mark did for us. We are sure he treats all his clients like this.”

Maria G.

Smart advice…

“We are so thankful to the McFadden’s for their incredible work in selling our home. We’re so grateful to have had their smart advice every step of the way!”

Olivia D.

Always yield results…

“I trust Mark and have recommended him many times to my friends and have even used him to sell my own home! His experience and knowledge always yield results!”

Lynn S.

We are very happy…

“We very thankful we had the opportunity to work with the McFadden team. They did such a great job and we are very happy!”

Dalene R.

Best in the business…

“McFadden Partners are the best in the business, period. Our family has purchased multiple homes with them, and there’s no one else we would recommend to a buyer or seller in the Washington area. Their personal service and knowledge are second to none. There’s a reason why so many of us trust Mark, Lyn & Hunter not just one time, but every time we are in the real estate market in Greater DC.”

Tim S.

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