Tetrilive: Interlocking Modular Units Rethink Compact Urban Housing in Mumbai

What if a video game could teach architects how to house a city? Tetrilive takes the interlocking logic of Tetris blocks and applies it to one of urbanism's most persistent problems: how to give families in dense cities both privacy and connection without sacrificing light, air, or affordability. The result is a staggered, modular dwelling where every volume locks into the next, creating a porous structure that breathes and socializes in equal measure.

Designed by Nida Colak and published on uni.xyz, Tetrilive is sited in Mumbai, a city where housing demand relentlessly outpaces supply and where multigenerational families negotiate shared and private space within increasingly compressed footprints. The project proposes a replicable prototype built from concrete and steel, two materials already ubiquitous in Mumbai's construction economy, assembled through prefabricated modular repetition to cut both cost and build time.

Staggered Volumes That Let a Dense City In

The cutaway rendering reveals how the dwelling's staggered volumes operate within Mumbai's tight urban fabric. Rather than stacking floors uniformly, Tetrilive offsets each modular unit so that gaps between blocks become balconies, light wells, and cross-ventilation channels. Entry points at the front and top of the structure distribute fresh air and daylight deep into the plan, countering the claustrophobia that plagues so many compact urban homes. The setbacks also create visual connections between units: a grandparent on one balcony can see and speak to a child on another, maintaining the familial surveillance and casual interaction that defines daily life in Indian households.

The urban context matters here. Mumbai's social fabric relies on neighborhood interactions that happen at thresholds, on landings, across open windows. Tetrilive's balconies are not decorative afterthoughts; they are the primary social infrastructure of the building, enabling communication across units and fostering a sense of togetherness that a sealed apartment corridor never could.

Sections and Courtyards: Mapping a Multigenerational Ecosystem

The sectional drawings and top view make the spatial strategy legible. Internal staircases link stacked levels vertically, while planted courtyards wedged between modules introduce greenery and further improve airflow. The sections show how each level serves a distinct programmatic role: private rooms allow solitude, open zones invite shared family activities, and transitional spaces like staircases and landings become informal meeting points. The planted courtyards are not ornamental; they act as thermal buffers and noise absorbers, softening the boundary between interior domesticity and the intensity of the city outside.

The project envisions a specific user: a multigenerational Indian family with grandparents, parents, and children under one roof. Grandparents connect with neighbors and grandchildren from shared zones while parents, often working throughout the day, benefit from a home environment that doesn't force constant togetherness. Children get open spaces for play within the modular framework and private nooks when they need quiet. It is lifestyle-oriented architecture that respects the rhythms of Indian family life rather than imposing a Western model of isolated bedrooms and sealed corridors.

Mesh Screens, Local Materials, and a Replicable Prototype

The floor plans paired with interior renderings show how Tetrilive handles the details. Mesh screens filter light and provide privacy without blocking ventilation, a strategy well suited to Mumbai's humid climate. Cascading greenery spills from upper levels, reinforcing the planted courtyards visible in the sections. Furniture is crafted from locally available materials, keeping the project contextually grounded and affordable. The floor plans confirm the modular repetition at work: identical or near-identical units can be pre-manufactured off-site and assembled quickly, reducing construction waste and labor costs.

What makes Tetrilive genuinely interesting as a prototype, rather than a one-off concept, is its insistence on common materials and repeatable geometry. Concrete and steel are not glamorous, but they are durable, widely understood by Mumbai's construction workforce, and available at scale. The modular logic means the same interlocking system could, in theory, be adapted to different plot sizes and family configurations across other Indian cities facing identical pressures.

Why This Project Matters

Tetrilive confronts a real tension in high-density housing: the desire for personal space versus the cultural necessity of communal living. Too many compact housing proposals treat density as a problem to be minimized, cramming families into sealed boxes. Colak's project treats density as a design opportunity, using the interlocking geometry to generate balconies, courtyards, and visual connections that would not exist in a conventional stacked plan. The building is porous where it needs to be social and solid where it needs to be private.

The broader lesson is one of specificity. Tetrilive works because it is designed for Mumbai: its climate, its materials, its family structures, its street-level sociability. The project does not propose a universal solution but a culturally calibrated prototype that could be adapted elsewhere. For cities across South Asia and beyond that face the same collision of rapid urbanization and housing scarcity, this kind of thinking, modular, affordable, and socially intelligent, points toward a more dignified compact living.

View the Full Project

About the Designers

Designer: Nida Colak

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Project credits: Tetrilive by Nida Colak.