Beginning in 2006, the conversion of a boarded-up brownstone at 224 East 14th street has been too fascinating to avoid headlines. The features that make the four-unit “Brownstone East Village” so noteworthy: on the second floor, a facade of honeycomb-patterned aluminum with a brownstone veneer can be automatically retracted to bare the home’s interiors to the bustling traffic of 14th Street just outside. At the rear, a glass- and steel-paneled garage door raises to open the kitchen onto the open air of an urban lawn. The project’s architect, Bill Peterson, moved into the garden triplex with the retractable facade screen and garage doors; Philadelphia developer Alon Barzilay purchased the home from Peterson in 2014 for $2.355 million. Now, this traffic-stopping two-bedroom triplex is back on the market asking $4.2 million.