1. General Layout Principles Zoning: Separate public (hall, kitchen) and private (bedrooms) areas. Circulation: Design clear pathways (corridors) minimizing dead ends. Natural Light & Ventilation: Maximize windows for light and airflow. Privacy: Bedrooms should ideally not open directly into the main hall. Vastu/Feng Shui: Consider directional placements if culturally relevant. 2. Hall (Living Area) Size: Generally the largest common area. Adequate for seating, TV unit. Access: Main entrance opens into the hall. Connects to kitchen and bedrooms (via corridor). Lighting: Large windows, provision for ceiling lights, wall sconces. Furniture Placement: Sofa, chairs, coffee table, TV unit. Maintain clear walking paths. Dining Area: Can be integrated into the hall or a semi-separate space. 3. Kitchen Location: Easily accessible from the hall/dining area. Work Triangle: Optimize placement of Sink, Stove, Refrigerator for efficiency. Ideal perimeter of triangle: $4 \text{m} - 7.9 \text{m}$ Counter Space: Adequate counter space on both sides of the stove and sink. Storage: Upper and lower cabinets, pantry space. Ventilation: Must have an exhaust fan/chimney and a window. Layout Types: L-Shape: Good for corners, open plan. U-Shape: Most efficient work triangle, ample counter space. Parallel/Galley: Best for narrow spaces. 4. Bedrooms (3) Overall: Each bedroom should be designed for comfort, privacy, and functionality. Master Bedroom: Largest room, often with an attached bathroom. Space for a king/queen bed, wardrobe, dressing table, study desk. Secondary Bedrooms: Space for double/single bed, wardrobe, study desk. Can share a common bathroom. Attached vs. Common Bathroom: Attached: Provides privacy for occupants. Common: Accessible from a corridor, serves multiple bedrooms or guests. Wardrobe Space: Built-in closets are ideal. Windows: Essential for light and ventilation. 5. Bathrooms (Toilets/Washrooms) Number: At least 2 (one attached to master, one common) for 3BHK. Layout: Shower/Bath area, toilet, washbasin. Wet and dry areas separation (if space permits). Ventilation: Exhaust fan is crucial; a small window is ideal. Access: Common bathroom accessible from corridor, attached from within the bedroom. 6. Circulation & Corridors Width: Minimum $0.9 \text{m}$ (3 feet) for comfortable movement. Lighting: Provision for adequate lighting, especially if long. Minimizing Space: Design to avoid excessively long or wide corridors that waste space. 7. Sample Flow (Conceptual) Entrance: Opens into Hall. Hall: Connects to Dining, Kitchen, and a central Corridor. Corridor: Leads to all three Bedrooms and the Common Bathroom. Master Bedroom: Has an attached Bathroom. 8. Key Considerations Entrance Door: $0.9 \text{m} \times 2.1 \text{m}$ ($3 \text{ft} \times 7 \text{ft}$) Internal Doors: $0.75 \text{m} - 0.9 \text{m} \times 2.1 \text{m}$ ($2.5 \text{ft} - 3 \text{ft} \times 7 \text{ft}$) Bathroom Doors: $0.6 \text{m} - 0.75 \text{m} \times 2.1 \text{m}$ ($2 \text{ft} - 2.5 \text{ft} \times 7 \text{ft}$) Window Sizes: Varies by room and light requirements, typically $1.2 \text{m} \times 1.2 \text{m}$ or larger. Wall Thickness: $0.15 \text{m} - 0.23 \text{m}$ ($6 \text{in} - 9 \text{in}$) for external walls, $0.1 \text{m} - 0.15 \text{m}$ ($4 \text{in} - 6 \text{in}$) for internal walls.