Domestic Evolution Originally constructed in 1979 as an unauthorised commercial shed, the building was acquired in 1995 by three parties seeking to create first-time homes within an established suburban context. What followed was a protracted and complex planning process, including two appeals to An Bord Pleanála, before construction was finally permitted to proceed in 1998. The three houses were completed in 1999. From the outset, the project embraced variation and individuality. While unified in overall form, each dwelling incorporated subtle differences in plan and spatial configuration, carefully calibrated to suit the lifestyles of its occupants—then comprising a couple in one house and single individuals in the other two. The interiors served as a deliberate exploration of spatial perception, where colour, texture, and material finish were employed to shape and enrich the experience of space. Over time, the houses evolved in response to changing patterns of occupation. As families grew, the original layouts were adapted to accommodate children and new modes of living. A significant transformation occurred in 2017, when the occupants of the central house relocated, allowing the three dwellings to be reconfigured into two larger homes. This reorganisation prompted a renewed architectural response: House 1 introduced a distinct additional room at first-floor level, while House 3 adopted a more open, L-shaped spatial arrangement. Each house was once again tailored to the specific needs and rhythms of its inhabitants. More recently, the project has engaged with broader societal shifts, particularly the impact of the housing crisis and the resulting prevalence of multi-generational living. A new rooftop addition provides a private suite for parents, complete with a terrace, while the first floor accommodates shared family living and entertaining, and the ground floor is dedicated to children’s rooms. This vertical stratification of space supports both privacy and cohesion within the family unit. The intervention represents a sustainable approach to housing: it intensifies the use of an existing suburban site, increases residential density without expanding the urban footprint, and extends the life and utility of the original structure. The new addition is constructed to Passive House standards, ensuring high levels of energy performance and comfort. Notably, the rooftop extension was constructed while the family remained in residence. A lightweight timber structure was carefully integrated, bearing on specific points of the existing steel roof frame and external walls to minimise disruption and structural intervention. The exterior is clad in bespoke painted glass, designed to reflect its surroundings and subtly echo the green tones of the patinated copper roofs characteristic of the neighbourhood. The result is an addition that is both contextually responsive and distinctly contemporary.