In an effort to combat Toronto’s current housing crisis, a series of affordable housing interventions were designed to meet the requirements of the Yellowbelt - an area of land designated as suburban neighbourhoods by the City of Toronto that prevents high-density development. Focusing on the Finch Hydro Corridor, a neighbourhood to the north of Toronto, a series of roof additions were proposed as rental units for each single-family detached house. These units follow their respective roof typologies to stay in line with the architecture of a typical suburban North American nieghbourhood. Furthermore, these units receive vast amounts of sunlight, are adjacent to green spaces and are located at a close proximity to Toronto’s Line 1 subway. This intervention would generate a positive return to the local economy as the owners would make profit while renting at an affordable price for students and young professionals alike.