The project is an alteration and addition in the northern suburb of Thornbury. The existing house built after World War One in the suburb’s pre-dominate Californian Bungalow style and is one of many distinct plans created by the State Savings Bank Scheme after World War One. The project takes it’s cue from the form of the ‘lean-to’ common to homes of this era, in which service rooms and open verandah spaces are located at the rear under a skillion roof addition pitched down low and leant against an east west gable roof line. The new ‘lean-to’ addition stretches across the block from western boundary to eastern access pathway allowing for a new articulated northern elevation punctuated by two twin ‘apertures’ that face the garden. Rennie Street House is deliberately small addition that is confidential to both street and neighbourhood, yet a highly personalised alteration arranged with care for its inhabitants.