Architects: HnP Architects
Area: 900 ft²
Year: 2024
Photographs: cut.idam
Lead Architects: Preethi R S, Sadam Hussain K
City: Tiruchirappalli
Country: India

The 300 Square Feet House residential and commercial project designed by HnP Architects in Tiruchirappalli, India addresses complex urban constraints by creating a compact, sustainable structure on a 12′ x 22′ plot. Located in a dense wall-to-wall neighborhood, the building includes two commercial units on the ground floor and one residential unit on each of the upper two floors. Spatial flexibility and openness were prioritized, with minimal interior partitions, shared staircases, and adaptive spaces such as balconies and buffer zones. Material choices—including exposed brick, lime plaster, reclaimed wood, and reused motor parts—reinforce the building’s raw aesthetic and sustainable approach. Natural ventilation and daylight were introduced through north-south slits, skylights, clerestories, and a brick jaali facade oriented to reflect cultural context and site limitations, proving that refined architecture can emerge from basic materials and tight urban footprints.

The 300 square feet house / hnp architects

A limited plot size should not be a justification for sacrificing quality in architecture. The client of this residence was allocated a 12′ x 22′ plot following the demolition of his ancestral property. The program called for two commercial units on the ground floor and one residential unit on each of the two upper floors. Positioned in one of the most densely populated neighborhoods of Tiruchirappalli, the residence, set within a wall-to-wall context, encountered multiple challenges beginning from the design phase.

The architects chose to design a structure that maintained a connection to the street on all levels while preserving the functionality of the interior spaces. Each floor was planned with an emphasis on spatial flexibility, incorporating minimal solid interior walls. A thinnai seater, positioned beside the road, provides a comfortable and welcoming place to sit and observe daily street life. Moreover, the staircase that links the ground floor with the two upper floors is shared with the adjacent property.

The first floor includes a living area, a cooking counter, a bedroom, a shared toilet, and a balcony. A jaali wall on this level, composed of diagonally arranged bricks, ensures sufficient privacy while maintaining a visual connection to the street. The balcony offers a clear view of the street below and also functions as a utility area for laundry equipment. On the second floor, a buffer zone at the entrance leads into a living room with an open kitchen layout. A sliding folding door between the living and bedroom areas allows for spatial flexibility during special occasions. The toilet is located away from the sleeping area, while a bathroom is positioned near the bed. In addition, loft storage on both the first and second floors is placed above the toilets and bathrooms to preserve as much open space as possible within the compact layout.

On a 300 sq.ft plot, where every inch had to be utilized as efficiently as possible, the aesthetic quality of the spaces was entrusted to the building materials themselves. Exposed brick walls, lime-plastered interior surfaces, terrazzo flooring, and cement oxide finishes were all allowed to express their natural textures and finishes. Reclaimed wood was used for the door and window frames, while discarded motor parts, such as chain sprockets, were repurposed as window grills to enhance and celebrate the play of incoming light.

The primary challenge faced by both the architects and the clients was their shared commitment to reducing reliance on artificial lighting and ventilation during daytime hours—a contrast to common practice in other buildings within the area. However, the wall-to-wall configuration of the street significantly restricted opportunities for natural light and airflow. With the east and west walls shared by neighboring structures, the only available sources for daylight and ventilation were the north and south facades. To address this, wall slits, clerestories, and skylights were incorporated across all three floors to bring sufficient natural light into the interiors. The brick jaali on the north facade serves as both a striking architectural feature and a means of enabling cross-ventilation, working in conjunction with openings on the south facade. Moreover, the brick pattern is intentionally tilted toward the west, reflecting the user’s cultural values and acknowledging the presence of a nearby mosque in that direction. Situated on a narrow street where maneuvering even a two-wheeler is difficult, the construction process proved to be just as complex as the design phase, especially in terms of managing construction vehicles and mixing wet materials on-site.

This raw and straightforward design challenges the prevailing local notion that architecture must rely on elaborate elements. It demonstrates that a simple, everyday structure can be executed with beauty and clarity through careful planning and the thoughtful use of basic materials.