Residential architecture has shifted to accommodate longer hours spent at home, multi-generational household structures, and the need for spaces that remain functional across decades. A single-family home in Paju, South Korea demonstrates how floor plan strategies and spatial independence can serve a family as children grow into adults and eventually return with families of their own. The three-story ferroconcrete structure spans 301.36 square meters and distributes bedrooms across different levels to give each family member a private domain. Architects approaching similar challenges can examine how architects drive passive house building envelope performance for insights on combining energy efficiency with flexible layouts. The design thinking behind this home offers lessons for anyone planning a residence that must adapt over time.
The Design Challenge of Flexible Family Living
The client requested a house that would age alongside him and his family. With two teenage children who would eventually leave for university and careers, the home needed to remain a place where those children could return with their own families for short stays. This requirement demanded bedrooms large enough to function independently and positioned in a way that gave each occupant a sense of territory. The floor area ratio restrictions under local law made securing this program difficult, so the design process began with maximizing usable square footage within the allowable envelope. Each vertical meter was evaluated for its contribution to the overall living program. Techniques discussed in blending heritage conservation with passive house design show how density and space constraints can drive creative architectural solutions rather than limit them.
Square Meter Allocation Strategy
With 301.36 square meters across three floors, every square meter needed a purpose. The ground floor houses shared living functions: the kitchen, living room, and dining area. The upper floors contain the private bedrooms. This vertical separation creates a clear boundary between communal and individual activities. Stairs act as the transition zone where family members pass from shared space into their own territory. The vertical stacking approach is common in compact urban lots where horizontal expansion is impossible and zoning laws restrict building footprint size.
Floor Plan Distribution Table
| Floor | Primary Functions | Approximate Area |
|---|---|---|
| Ground Floor | Living room, kitchen, dining, guest entry | ~100 sqm |
| Second Floor | Parent bedroom suite, secondary bedroom | ~100 sqm |
| Third Floor | Children bedrooms with private toilets | ~100 sqm |
Each floor shares roughly equal square footage, which prevents any single level from dominating the house. This balance contributes to the sense that every resident occupies a meaningful portion of the home.
Independent Spaces Within a Shared Home
Each bedroom in the Simon House has its own toilet. This decision, simple on paper, transforms how the house operates. A teenager can spend a full day in their room without needing to cross common areas for bathroom access. A visiting adult child with a baby can manage diapers and nighttime trips without disturbing others. The independent bathroom per bedroom also makes future rental conversion possible if the family ever wants to lease part of the house. This design choice echoes principles seen in heritage conservation meets high-performance design projects where independent zones support both privacy and energy efficiency through reduced reliance on shared HVAC zones.
Vertical Distribution of Private Spaces
The architects distributed bedrooms across all three floors rather than clustering them on one level. This decision prevents any single floor from feeling like a dormitory corridor. Each floor contains at least one bedroom, and each bedroom occupies a corner or end position that reinforces privacy. The parent bedroom sits on the second floor, giving parents proximity to the main living area while remaining removed from the teenagers on the third floor. The third floor functions almost like a separate apartment for the children, complete with its own bathroom access and window views that do not overlook the shared garden below.
Key Features of Independent Bedroom Design
- Private toilet en suite with each bedroom eliminates shared bathroom conflicts during morning rushes
- Bedrooms sized to accommodate a small desk and seating area, not just a bed
- Windows positioned for natural light and views specific to each floor orientation
- Sound isolation between floors achieved through the ferroconcrete structure
- Separate entrance paths so residents can enter their floor without passing through other private zones
Adapting Homes for Extended Indoor Stays
The COVID-19 pandemic arrived during the design process and changed the context for every decision. The client requirements for sufficient size and independence became essential rather than aspirational. Spaces that families previously entered only at night to sleep transformed into 24-hour environments containing sleep, work, study, exercise, and rest. The Simon House response was to make each bedroom a self-contained unit within the larger home. Each room now supports all daily activities without forcing occupants into common areas. This approach aligns with civic design integrated with passive house principles where building performance and occupant well-being drive spatial organization from the earliest sketches.
Designing for 24-Hour Occupancy
A bedroom designed for sleeping only requires a bed, a closet, and a window. A bedroom designed for 24-hour occupancy needs a desk with task lighting, a comfortable chair for reading or screen work, accessible power outlets on multiple walls, storage for clothes and personal items, and enough floor space for stretching or light exercise. Each bedroom in the Simon House includes these elements. The rooms are not large by luxury standards, but they are optimized for continuous use through careful dimensioning and outlet placement.
Space Requirements for 24-Hour Rooms vs Sleeping-Only Rooms
| Feature | Sleeping-Only Room | 24-Hour Occupancy Room |
|---|---|---|
| Minimum floor area | 9 to 12 sqm | 14 to 20 sqm |
| Desk and chair | Optional | Required |
| Power outlets | 2 to 3 | 6 to 8 |
| Task lighting | Overhead only | Overhead + desk lamp |
| Storage | Closet only | Closet + shelving + drawers |
| Floor space for movement | Minimal | 2+ sqm open area |
| En suite bathroom | Optional | Highly recommended |
Bringing the Outdoors In Through Window Design
When interior space is limited, windows become critical tools for expanding the perceived volume of a room. The architects planned windows to visually bring in the natural and urban exterior surrounding the site. Each bedroom window frames a specific view: the garden from the ground floor, the treeline from the second floor, and the skyline from the third floor. This intentional framing turns each window into a living picture that changes with seasons and time of day. Window placement also supports passive solar heating in winter and cross ventilation in summer. The relationship between opening design and energy performance is explored in detail through the architect role in passive house design principles and strategies for achieving comfort without mechanical overreliance.
Window Placement and Spatial Psychology
People who spend extended time in a room need a view that changes. A static view leads to visual fatigue and a sense of confinement. The Simon House addresses this by providing windows on at least two walls in every bedroom where possible. Corner windows allow light from multiple directions and give the occupant a sense of connection to the outside world. The architects also considered the height of window sills. Lower sills at 40 to 50 centimeters above the floor allow seated occupants at a desk to see the horizon rather than just the sky. Higher sills in rooms facing the street maintain privacy while still admitting daylight. This attention to sill height and view angle adds comfort without increasing construction cost.
Structural and Material Choices for Long-Term Homes
The Simon House uses a ferroconcrete structure with brick finishing materials. Ferroconcrete offers durability, fire resistance, and excellent sound isolation between floors. For a three-story home designed to last decades and accommodate multiple generations, concrete construction provides the structural stability that wood frame cannot match at this scale. The brick exterior requires minimal maintenance over its lifespan and develops a patina that makes the house look better as it ages. This approach follows integrating passive house standards with sustainable design in urban architecture where material selection directly affects long-term building performance and occupant comfort.
Brick as a Finishing Material
Brick cladding on a ferroconcrete structure provides thermal mass that moderates indoor temperature swings. During summer, the brick absorbs heat during the day and releases it at night. During winter, the same mass stores heat from passive solar gain and radiates it into interior spaces. Brick also requires no painting or sealing, reducing long-term maintenance costs. The material choice aligns with the client request for a house that grows older gracefully, since brick develops character through weathering rather than appearing worn after a few years.
A home designed for multi-generational living must balance privacy with connection, flexibility with structure, and durability with beauty. The Simon House demonstrates that distributing independent bedrooms across floors, providing en suite bathrooms, sizing rooms for 24-hour occupancy, and using materials that age well creates a residence that serves a family through every stage of life. These principles apply to any home where the goal is to build for decades, not just for the current season.