The Real Deal - Manhattan’s top agents

Hockey Player Turned Williamsburg Innkeeper

Williamsburg, Brooklyn, Gets Its First Bed and Breakfast

Lyon Porter of New Hospitality Venture Urban Cowboy

Charm alert: 5 NYC apartments with exposed brick walls

Brokers Who Go Big With Their Closing Gifts

5 Manhattan Penthouses With Enviable Outdoor Spaces

Brokers are using virtual reality headsets to sell apartments

Personal Websites

Design Build Website

Urban Cowboy

The Dive Motel

Social Media



NYU — Schack Institute Real Estate, Master’s Degree, Real Estate


The Gary Larsen Foundation

Ronald McDonald House

Make-A-Wish Foundation

James Jay Dudley Luce Foundation

ACE Program for the Homeless


Design Build at Compass, co-founded by Lyon Porter, Stephen McArdle, and Jonah Katz, blends award-winning design with encyclopedic knowledge of the market to deliver one of the most dynamic and creative alliances in residential brokerage. The founders have represented over $2 Billion across 1,500 closed transactions encompassing every asset type: new development towers in Manhattan, pre-war lofts in Brooklyn, multi-million dollar development sites, and penthouses including the storied Puck Building and The Parc Imperial Tower.

Offering best-in-class service to homeowners, renters, investors, and developers, the founders' innovative, design-focused approach adds superior value to any real estate transaction. Members have consistently shattered price per square foot records in all asset classes and rely on a deep personal referral network that has thrived on a shared trust and understanding between real estate advisor and client.

The founders' expansive resume in design — having been featured in Architectural Digest and many other design and hospitality publications — allows for a unique approach through every step of a real estate transaction, whether it be the design and pre-development of a condo tower, overseeing the gut renovation of an individual owner’s property, or staging a resale property to position it to sell at the highest price. The ability to wear many hats — top producing broker, developer, designer, hotelier, and social media expert — has firmly placed Design Build at the forefront of New York City's real estate landscape.


Lyon Porter | Founding Partner

A former professional hockey player turned top producing broker, designer, hotelier, motelier, restaurateur, and developer, Lyon Porter is a real estate Renaissance man. Lyon possesses the unique ability to add value through all verticals of space, from residential to commercial to hospitality.

Since launching his real estate career as the "Rookie of the Year" for his firm, Lyon has enjoyed a meteoric rise that earned him a place on The Real Deal’s “Real Estate’s Rising Stars Under 35,” several features in Architectural Design and other top publications for his design work, and a growing brand of boutique hotels Urban Cowboy and The Dive Motel that he designs, owns, and operates.

Throughout his 15+ year career in brokerage, Lyon has sold everything from $62 million development sites to multi-million dollar penthouses at the storied Puck Building and The Parc Imperial, all the way to townhouses in Bedstuy and record-breaking new development towers in Harlem. He has broken every multi-family and condo price-per-square-foot record in Brooklyn and was responsible for the design and repositioning of a REIT’s 500+ individual building rental portfolio. Lyon prides himself on offering best-in-class service to an ever-growing network of friends and clients that entrust him with what is often the largest financial decision of their lives.

Lyon’s experience developing and designing his own hotels and restaurants has allowed him to approach real estate through a creative and artistic approach in a way that sets him apart from strict analytics. Instead, he combines his deep statistical market knowledge with an outside-of-the-box mindset to add value and outperform the market for his clients. It is this keen eye for design that has propelled Lyon to the upper echelon of New York brokerage.

With a Master’s in Real Estate from New York University, as well as experience in private equity, Lyon prides himself on adding value to any real estate transaction. He is committed to his clients and is passionate about helping them with the purchase or sale their most valuable asset: their home.

In his time off, he enjoys traveling and exploring the world with his partner Jersey Banks and spending time with his seven year old son, "LP3."


Jonah Katz | Founding Partner

Jonah is an accomplished real estate professional whose diverse career spans luxury sales, rentals, and design throughout New York City. In 2012 he founded a boutique brokerage in which he recruited and managed a team of 20+ agents before moving his team to one of the leading residential firms in the city. Jonah's team is now responsible for over $2 Billion in closed transactions to date as one of the top producing teams in the industry.

A native New Yorker with intimate knowledge of the city, Jonah works with a wide range of clients: from savvy investors purchasing new condos in Brooklyn to first-time buyers navigating the complexities an Upper West Side co-op board. Most recently his notable transactions include the $18 Million sale of the penthouse at the renowned Puck Building, and multi-million dollar deals at 1 West End Avenue and at several new condo developments throughout Brooklyn.

Jonah blends comprehensive market analysis with creative problem solving and a careful eye for design to deliver exemplary results in every transaction. His team, having been featured in Architectural Digest and several other top design publications, is uniquely qualified to excel in every facet of a real estate transaction, from the design and predevelopment of a condo tower to overseeing the renovation of an individual homeowner's property. Jonah prides himself on offering best-in-class service to his clients and is known for forging strong personal bonds that endure long after the closing.

Jonah is currently enrolled in NYU's Schack Institute of Real Estate, where he is pursuing his Master's in Real Estate. He serves on the Steering Committee of the Young Patrons Lincoln Center and during his time off enjoys vacationing at his home on Fire Island.


Stephen McArdle | Founding Partner

Stephen McArdle has enjoyed a distinguished career in real estate marked by great success and diverse experience in the Manhattan market. After working as a real estate appraiser in the early 1990s, Stephen quickly rose to become one of the top producing brokers in New York as a new development expert and real estate advisor for individual owners and investors. Excelling throughout his 15+ year career, Stephen extensive resume includes the sale of over 1,300 residential units to date.

Previously a developer himself, Stephen possesses a deep understanding of the new development process, from concept and design to construction and development, all the way through to sales. He prides himself on having a hand in every aspect of new development, having spearheaded the creative marketing and branding for 20+ building projects and served as a top consultant to New York’s upper echelon of developers. This rare and expansive resume has allowed Stephen to provide invaluable insight as an expert real estate advisor to his client base.

After years running his own real estate sales and marketing firm, Stephen went on to become a top producer at a leading brokerage firm in the city before joining Compass. In addition to new development, his true forte is providing stellar one-on-one service to buyers, sellers, and renters, whether they are looking for their New York City dream home or the best return on investment.

“Every real estate transaction is a major life choice. I’ve partnered with thousands of families and individuals in determining what best suits their needs, lifestyle, budget and future vision,” says Stephen, whose care and performance earned him a spot on The Real Deal’s Top 20 Listing Brokers in New York.

A native New Yorker, Stephen resides with his family in Lower Manhattan. Stephen co-founded Walk With Us NYC, a foundation dedicated to supplying much-needed shoes and socks to homeless children, women and men of New York City. He serves as Finance Chair of the James Jay Dudley Luce Foundation, supporting young global leadership that impact positive social change. He also serves as Finance Chair of Orphans International Worldwide. Additionally, he is co-founder of the Gary Larsen Foundation, which raises supplemental funds for organizations like Ronald McDonald House and Make-A-Wish Foundation, among others. Stephen previously worked as a parent representative on the city’s task force on overcrowding in Lower Manhattan schools. He, his wife Toni, and their four sons pride themselves on their shared commitment to community.

Design Build’s Listings