This residence is built in a densely populated residential area near central Sapporo. With the anticipation that buildings will be constructed around it in the future, the project was planned with the theme of ensuring natural light over the long term. Although adopting a first-floor living room, by combining a south-facing courtyard and an atrium, large openings on the second floor, and clerestory windows at third-floor height, the design captures light from different elevations and gently distributes it throughout the residence. Furthermore, the exterior wall facing the courtyard is shaped to open, actively utilizing reflected and indirect light. The stairwell also functions as a natural ventilation shaft, bringing light and breeze into the building through the architectural system itself. In an urban setting, the residence reconciles privacy, a sense of openness, and a comfortable indoor environment.
Use: Residential
Building footprint: 120.98 m² (36.59 tsubo)
Total floor area: 202.69 m² (61.31 tsubo)
Construction method: New residential construction / conventional timber framing, two stories
Contractor: Shinei Koken Co., Ltd.
Electrical: Abe Denki
Building services: Taniguchi Building Equipment
Kitchen / built-in furniture / bespoke joinery: Takuryu Woodworks
Sheet metal / waterproofing: Kumagai Sheet Metal Industry
Landscaping: Edia Co., Ltd.
Nameplate design: Recess Hokkaido
Shutters: Bunka Shutter
Exterior fenestration: timber curtain wall (m.a.p); timber entrance door; resin sashes with triple/paired glazing and single-sided Low-e coating (some assemblies are fire-rated)
Heating: City-gas Eco-Jozu (Hokkaido Gas) + Koremo underfloor heating central heating / hot-water panel heaters (P.S.)
Hot water supply: City-gas Eco-Jozu (Hokkaido Gas)
Insulation: Foundation insulation (extruded polystyrene foam insulation Type 3-b, 100 mm); under-slab (extruded polystyrene foam insulation Type 3-b, 50 mm); exterior walls (cavity insulation: high-performance glass wool 16K, 105 mm + additional insulation 75 mm); ceiling insulation (high-performance glass wool 16K, 240 mm)
Lighting: LED lighting
Flooring: Black walnut engineered floor, oil finish
Interior walls & ceilings: tile finishes and vinyl wallpaper
Exterior walls: color Galvalume steel spandrel cladding with concealed joints; border tile cladding; timber boarding; plaster finish
Roofing: PVC sheet waterproofing