Firth House

• the dwelling's placement on a narrow but deep tree-fronted lot on a rise on River Road, facing east toward the Red River

Key elements that define the large dwelling's structural history, particularly its combination of Georgian and Gothic styles, include:

• its basic two-storey rectangular volume, Georgian in inspiration, symmetrically proportioned, with a medium-pitched side gable roof and walls of stone and wood
• the neatly composed front, of modest Gothic inspiration, dominated by a centred wood entrance porch and balcony and by three, steeply pitched wall dormers, with the main and balcony doorways flanked by tall, vertically aligned rectangular windows, including large ground-floor openings with transoms
• the combination of construction methods and materials, including thick rough-cut stone walls that extend to a height of two storeys on the sides and one storey at the rear; the entire front (east) facade and upper portions of the side and rear walls of wood construction clad by horizontal siding painted white
• the additional fenestration provided by an orderly arrangement of openings and a gable dormer at the rear, pairs of rectangular windows in the side walls, a single opening in the south gable end, etc.
• the modest details and finishes, including plain wood eave and window trim, wood shingles, a tall brick chimney on the north side, deep stone lintels, turned wood posts, balusters and decorative spindles on the front porch, etc.

Key elements that define the dwelling's interior heritage character include:

• the straightforward centre-hall plan, with the main floor divided into a front parlour and dining room and a rear kitchen and pantry, and the upper level into four bedrooms of roughly equal size