About the firm:

Kass & Associates is an architecture and design firm based in Philadelphia. Founded in 1990, the firm specializes in creating and renovating distinctive, quality homes for clients in the city’s vibrant downtown as well as in the surrounding region. The firm provides a high level of care, attention, and expertise in both traditional and contemporary settings.


The firm applies its skills equally in small and large projects, and always seeks to enhance client’s goals. Customer service and satisfaction is a priority, whether working on the renovation of a single room or a complete home.

Our team of talented professionals is adept at collaborating closely with owners, builders, interior designers, artisans, landscape designers, and technicians throughout the design and construction process. The firm works successfully with community groups, zoning committees, and historic review boards on behalf of our homeowners.

Kass & Associates works in both country and urban settings. The firm has completed over sixty urban apartments, condominium units, and townhouses in premier locations around Philadelphia, as well as dozens of house renovations, additions, and new custom homes.

The firm has had its residential work featured in Architectural Digest, House Beautiful, Custom Home, New Old House, Main Line Today, Philadelphia Style, and Philadelphia Magazine. Kass & Associates designed the Traditional Model Showcase Unit at The Lanesborough as part of Philadelphia Magazine's 2003 Design Home.

Kass & Associates is recipient of a 2016 Palladio Award from Period Homes and a 2016 Grand Jury Award from the Preservation Alliance for Greater Philadelphia in recognition of their Victorian Residence project. The firm also received the 2007 Best Residential Project Award from the Associate Builders and Contractors Inc., Southeast Pennsylvania Chapter and a Historic Preservation Award from the Historic Architectural Review Board of Lower Merion Township in 1997.



Spence Kass is an architect and principal of Kass & Associates. Mr. Kass has over 35 years of design experience encompassing a wide range of disciplines including architecture, interior design, and urban design. Mr. Kass and his firm are known for their design of fine urban and country homes.

Spence Kass

Prior to opening his firm in 1990, Mr. Kass created elegant interiors for the Philadelphia corporate headquarters of Provident Mutual and Aramark. Mr. Kass developed an early interest and respect for craft and detail, and his firm excels in detailing in stone, wood, metal, plaster, and stained glass.

Mr. Kass is winner of the James Harrison Steedman Fellowship, a prestigious design competition that provided a year in residence at The American Academy in Rome. His extensive travels continue to influence and inform his design expertise. Mr. Kass enjoys designing in a wide range of styles, and strives to find appropriate solutions to meet client’s design goals while managing the challenges of budget and schedule.

In conjunction with his professional practice, he has shared his enthusiasm for architecture and design for over 20 years as a Visiting and Adjunct Professor, and is currently an Adjunct Professor of Architecture at Philadelphia University. Mr. Kass is a member of the American Institute of Architects, the Society of Architectural Historians, and served as a Board Member on the Philadelphia chapter of The Institute of Classical Architecture & Art.

Mr. Kass holds a Bachelor of Architecture degree from the Rhode Island School of Design and a Master of Architecture degree from Cornell University. His mentors and teachers have included Charles Moore, Robert A. M. Stern, and Colin Rowe. As a member of NCARB, Mr. Kass is licensed to practice architecture in Pennsylvania, New York, Delaware, New Jersey, Maryland, Illinois and Florida.



Daniel J. Driskell, Laura Kass, Jeffrey Lewis, RA, Ruth Cook Rowe, RA


Dan Driskell
Dan Driskell holds a Bachelor of Science in Architecture from University of Maryland. Dan has been a Staff Designer with the firm since 2005. In addition to his input on projects, Dan creates computer modeling and animations, as well as the preparation of firm marketing materials.

Laura M. Kass
Laura Kass holds a Master of Art degree from Cornell University and a Bachelor of Fine Arts degree from Rhode Island School of Design. Laura assists the firm with in-house interior design services as well as design coordination with consulting interior designers and artisans. Laura specializes in the design of decorative elements for firm projects including marble floors, wrought iron, stained glass, and the selection of colors and materials. Outside of the firm, Laura is an accomplished artist and builds architectural models for museum exhibitions.

Jeffrey Lewis, RA
Jeffrey Lewis holds a Bachelor of Architecture from Rice University. Jeffrey has been a Project Architect with the firm since 2016. His over 25 years of professional experience includes 6 years with Bower, Lewis, Thrower Architects, 8 years with Venturi, Scott Brown & Associates, a one year internship with Ellerbe Becket, as well as independent work and consulting with K Yoder Design. Jeffrey is a Registered Architect in the State of Pennsylvania.

Ruth Cook Rowe, RA
Ruth Cook Rowe holds a Master of Architecture degree from the University of Pennsylvania and a Bachelor of Science in Architecture from the University of Virginia, which included study at the Architectural Association in London. Ruth has been a Project Architect with the firm since 2016. Her over 30 years of professional experience includes 13 years with Shep Houston, AIA, 3 years with Atkin Voith and Associates, a year with David M. Genther and Associates, independent practice, and consulting for a number of residential architecture firms. Ruth is a Registered Architect in the State of Pennsylvania.

Kass & Associates wishes to acknowledge the contributions of Michelle C. Colville, Kristina Duveneck, and David D. Nordone who were each with the office for over 18 years and as Project Architects were instrumental in helping the firm achieve a high level of quality on both small and large projects.

  • Former Staff, Interns & Collaborators who have contributed to the firm:
  • Martha Anez
  • Marki Briggs
  • Andrew Derrickson
  • P. Justin Detwiler
  • Paul Drzal
  • J. Matthew Eastman
  • Kinan Fadl
  • David Fante
  • Angelique Feuillet
  • William K. Fisher
  • Tony Hopkins
  • Cliff Humphreys
  • Justin Istenes
  • Erin Keane
  • Justin Killian
  • Tanya Krawchuk
  • Kelly Lemon
  • Kelly McGowan
  • Michelle Mendenhall
  • Robert Pistilli
  • Michael Powell
  • Ian Read
  • I. David Smith


  • Philadelphia Style Magazine
  • March / April 2006
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  • Home & Design – Rittenhouse Square Apartment
  • November /December 2004
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  • Philadelphia Style Magazine – Design for Living
  • November / December 2004
  • Download PDF