“LightHouse” was honoured first prize in the Saukonpaasi Housing Invited Architectural competition by ATT. This social housing project was built as one of the first blocks in the new Jätkäsaari housing area in Helsinki. The block consists of a housing wall that closes the inner garden from the outer streetlife. A tower with a lit top marks the urban square next to the block both from close distance and along views through the whole Jätkäsaari. The envelope of the block is built of white pre-fabricated concrete elements. There is a continuous play of larger and smaller openings in the fibre concrete wall. Semi-transparent balcony walls create varying degrees of exposure and privacy.