Category:Panelový dům v Ďáblicích, Panel house in Ďáblice, Prague, Czech Republic

The first prefabricated panel apartment building in Prague, U Prefy 25 in Ďáblice is a three-storey house with twelve 3+1 flats of nearly 100 m² each. It uses the T16 skeletopanel system, with a patented lightweight ceiling panel and ornamented panel surfaces. Unlike later panel blocks, it has a shallow gabled roof with a decorative cornice, and its panels are covered with plaster.

Architect Miloslav Wimmer submitted the project for Prague's first prefabricated apartment building in 1948, with facades designed by Václav Havránek. Construction was delayed by a static review calling the structure "on the edge of instability"; academician Stanislav Bechyně confirmed tests showing elevenfold safety. The first tenants moved in on 1 July 1955, and a general repair followed in 1965.

The house's architect, Miloslav Wimmer, moved into one of its twelve flats and lived there from the first tenancies on 1 July 1955. The ornamental surface of the panels, developed to improve their technical properties, is a detail visible on the facade.

The building sits on U Prefy Street and retains its original architectural details to this day. Visitors can easily observe the exterior features from street level.

Leftover construction panels from this project were later used to build the nearby Ďáblice Observatory. This connection shows how resources were creatively reused during that period.