Philadelphia Rowhouse
The Philadelphia rowhouse is the characteristic residential building type of the city, comprising attached brick houses sharing side walls that line streets throughout Philadelphia's neighborhoods. More rowhouses exist in Philadelphia than in any other American city—over 400,000 units—making this form fundamental to the city's urban character. The rowhouse has housed Philadelphians of all classes for over two centuries, adapting through architectural styles while maintaining essential features of attached construction, party walls, and direct street access.[1]
History
Colonial Origins
Philadelphia's rowhouse tradition started in the colonial period, when attached houses in the English Georgian style lined streets near the Delaware River. Walk through Elfreth's Alley and you'll see some of the earliest surviving examples—homes that show the form was well established by the mid-eighteenth century. They're modest buildings mostly: two or three stories with simple brick facades and no frills.[1]
Nineteenth-Century Expansion
The nineteenth century brought explosive rowhouse construction as Philadelphia spread out in all directions. Developers didn't build one house at a time. They constructed entire blocks simultaneously, creating the uniform streetscapes you see in so many neighborhoods today. Federal, Greek Revival, and Victorian styles came one after another, each bringing distinctive details while keeping that basic attached form intact.[1]
That century also developed the distinctive Philadelphia rowhouse variations:
- Two-story houses — Modest workers' housing in industrial neighborhoods
- Three-story houses — Middle-class neighborhoods, often with bay windows
- Four-story houses — Larger houses in wealthy areas
- The "Trinity" — Three small rooms stacked vertically, often just one room per floor
Builders got efficient at construction methods, creating substantial quantities of housing that made Philadelphia more affordable than comparable cities.[1]
Twentieth-Century Evolution
Things shifted in the twentieth century toward three-story houses with larger rooms and modern amenities. The "daylight rowhouse" came along, with deep light wells that improved ventilation in the home's center. After World War II, Northeast Philadelphia and other expanding areas continued the rowhouse tradition in newer styles.[1]
Characteristics
Construction
Traditional Philadelphia rowhouses are built of load-bearing brick, with party walls shared between adjacent houses. The walls, typically three wythes (layers) thick, provide structural support, sound separation, and fire resistance. Wooden floor joists span between party walls. Plaster ceilings run below them, wooden floors above.[1]
Layout
Living spaces sit at the front, with dining rooms behind and kitchens at the rear. That's the typical arrangement. Bedrooms occupy upper floors, and bathrooms (added later in older houses) sit on upper floors or in rear extensions. Basements provide storage and utility space, while variations in width and depth accommodate different lot sizes and price points.[1]
Exterior Details
Facades reflect their era's styles:
- Georgian and Federal — Symmetrical facades, simple brick, minimal ornament
- Greek Revival — Marble trim, bold doorways, classical details
- Italianate — Bracketed cornices, tall windows, brownstone trim
- Victorian — Bay windows, decorative brickwork, varied colors
These stylistic differences create real visual variety within the consistent rowhouse form.[1]
Contemporary Significance
Philadelphia's rowhouse stock provides relatively affordable housing compared to other northeastern cities. Neighborhoods with rowhouses support walkable urbanism with local retail and transit access. Contemporary interest in urban living has increased demand for rowhouses, driving renovation and rising prices in desirable areas. Still, vacant rowhouses challenge other neighborhoods.[1]
Maintaining and renovating rowhouses demands understanding of traditional construction. Party wall agreements, masonry maintenance, and system updates present challenges particular to attached housing. Organizations like the Preservation Alliance for Greater Philadelphia provide guidance for rowhouse owners.[1]