No 7 Irwin Street is a single storey house constructed in brick and rendered brick with a hipped and gable tiled roof, set on a huge 1151sqm. It is good expression of the Inter-War Bungalow style. The front elevation is asymmetrically planned with a thrust gable bay and a part width hip roofed verandah. The verandah is supported on masonry columns. The gable bay features a set of casement windows under a sunhood. There is a central door flanked by casement windows. The roofscape features rendered chimneys and finials.
The place retains its form and some of its details. There are additions to the rear and a garage to the south of the house. The house has a spectacular backyard with large pool, sprawling lawns, mature trees, treehouse and cubby house. It has a versatile floorplan featuring 4 bedrooms, 2 bathrooms, open-plan living and a separate formal lounge. There are jarrah floorboards, high ceilings and period features throughout the home.
The place is consistent with the building pattern in the Precinct. The place plays an important role in the pattern of development of a middle class suburb.