![Barcode House by David Jameson](https://static.dezeen.com/uploads/2011/08/dezeen_Barcode-House-by-David-Jameson_1_top5.jpg)
Barcode House by David Jameson
A sequence of horizontal steel rods resemble a barcode on the glass facade of a house extension in Washington DC.
![Barcode House by David Jameson Barcode House by David Jameson](https://static.dezeen.com/uploads/2011/08/dezeen_Barcode-House-by-David-Jameson_23.jpg)
American architect David Jameson designed the four-storey extension, which provides a new kitchen, living room, balcony and roof deck to the terraced house.
![Barcode House by David Jameson Barcode House by David Jameson](https://static.dezeen.com/uploads/2011/08/dezeen_Barcode-House-by-David-Jameson_8.jpg)
The two street-facing facades of Barcode House are transparent, composed of glass panels that infill a grid of steel beams.
![Barcode House by David Jameson Barcode House by David Jameson](https://static.dezeen.com/uploads/2011/08/dezeen_Barcode-House-by-David-Jameson_22.jpg)
The narrow barcode-like rods bridge this framework, matching the heights of eaves and window frames on neighbouring properties.
![Barcode House by David Jameson Barcode House by David Jameson](https://static.dezeen.com/uploads/2011/08/dezeen_Barcode-House-by-David-Jameson_5.jpg)
A door on the first floor is the only connection between the existing house and the extension, which has its own staircase.
![Barcode House by David Jameson Barcode House by David Jameson](https://static.dezeen.com/uploads/2011/08/dezeen_Barcode-House-by-David-Jameson_6.jpg)
More American houses from the Dezeen archive include a Philadelphia residence with a glazed interior wrapped in a curved brick facade and a New York loft with glass ceilings and walls - see more stories about projects in the USA here.
![Barcode House by David Jameson Barcode House by David Jameson](https://static.dezeen.com/uploads/2011/08/dezeen_Barcode-House-by-David-Jameson_13.jpg)
Photography is by Paul Warchol.
![Barcode House by David Jameson Barcode House by David Jameson](https://static.dezeen.com/uploads/2011/08/dezeen_Barcode-House-by-David-Jameson_12.jpg)
Here's some more text from Jameson:
Barcode House
Barcode House explores juxtapositions between the heavy and light and the old and the new.
![Barcode House by David Jameson Barcode House by David Jameson](https://static.dezeen.com/uploads/2011/08/dezeen_Barcode-House-by-David-Jameson_10.jpg)
The work is formed by positioning the project’s diverse pressures into a unique situational aesthetic.
![Barcode House by David Jameson Barcode House by David Jameson](https://static.dezeen.com/uploads/2011/08/dezeen_Barcode-House-by-David-Jameson_7.jpg)
Brittle masonry walls of the existing Washington, DC row house governed that the addition be engineered as a freestanding structure.
![Barcode House by David Jameson Barcode House by David Jameson](https://static.dezeen.com/uploads/2011/08/dezeen_Barcode-House-by-David-Jameson_9.jpg)
Site constraints dictated a vertically oriented spatial solution.
![Barcode House by David Jameson Barcode House by David Jameson](https://static.dezeen.com/uploads/2011/08/dezeen_Barcode-House-by-David-Jameson_15.gif)
![Barcode House by David Jameson Barcode House by David Jameson](https://static.dezeen.com/uploads/2011/08/dezeen_Barcode-House-by-David-Jameson_16.gif)
The client’s desire for transparent living space generated the opportunity to create an integrated solution for lateral force requirements.
![Barcode House by David Jameson Barcode House by David Jameson](https://static.dezeen.com/uploads/2011/08/dezeen_Barcode-House-by-David-Jameson_17.gif)
![Barcode House by David Jameson Barcode House by David Jameson](https://static.dezeen.com/uploads/2011/08/dezeen_Barcode-House-by-David-Jameson_18.gif)
Structural steel rods within a glass window wall are aligned with datum lines of the neighboring building elevations. A stucco circulation tower anchors the living space to the existing row house.
![Barcode House by David Jameson Barcode House by David Jameson](https://static.dezeen.com/uploads/2011/08/dezeen_Barcode-House-by-David-Jameson_19.gif)