Located on the foothills of Vitosha Mountain in Sofia, ACME is a residential complex consisting of three building volumes accommodating eleven apartments. The architectural concept focuses on the design of the roofs, which merge seamlessly with the facades and are treated like a fifth facade.

By continuing the Swisspearl facade cladding as a roof covering, and eschewing an eaves overhang, the archetypal form of « house » has been abstracted and the scale of the house visually reduced. The smooth, dark Swisspearl panels create a strong visual contrast with the russet textured brick facades.