# Okinawa house blurs boundaries with overlapping concrete structures

IGArchitects creates fluid living spaces through ambiguous structural elements

- **Source:** [architecture archives | designboom | architecture & design magazine](https://brifing.si/source/1e716da2-18e6-4704-96a6-818e7860b99f)
- **Published:** 2026-09-21
- **Topic:** [Design & UX](https://brifing.si/c/design)
- **Original article:** <https://www.designboom.com/architecture/overlapping-concrete-walls-columns-inside-outside-okinawa-house-igarchitects/>
- **On Brifing:** https://brifing.si/s/340933a0-b104-4396-b189-fcf59b281c74

## Structural elements define space

The Okinawa house by IGArchitects uses overlapping reinforced-concrete walls and columns to create a continuous spatial field rather than conventional rooms. These structural elements establish varying degrees of enclosure while maintaining visual and physical connections between areas. The design intentionally blurs the boundaries between interior and exterior spaces, allowing light, air, and movement to flow freely. This approach challenges traditional notions of room division in residential architecture.

## Roof as unifying element

A single large roof spans the entire structure, creating a cohesive sheltered environment beneath. This roof unifies the overlapping concrete elements while providing protection from Okinawa's climate. The architects reduced the design to essential strong elements - walls, columns, and roof - letting their relationships generate spatial complexity. The roof's generous coverage enables outdoor-like living spaces that remain protected from the elements.

## Flexible spatial framework

Rather than assigning fixed functions to specific rooms, the design creates adaptable spaces that accommodate various activities. The overlapping concrete elements form a flexible framework that residents can use in multiple ways. This approach reflects contemporary living needs where spaces serve changing purposes. The project demonstrates how structural order can coexist with programmatic flexibility in residential design.

## Architectural philosophy

IGArchitects explores how strong structural elements can create both definition and ambiguity in architecture. The design intentionally maintains spatial uncertainty, with areas that are neither fully interior nor exterior. This philosophy challenges conventional binary notions of inside/outside in residential architecture. The project represents an investigation into how structural order can enable rather than restrict spatial possibilities.

## Material and form

The architects chose reinforced concrete for its structural capabilities and monolithic aesthetic. The material's mass and permanence contrast with the design's spatial fluidity. Concrete walls and columns are positioned to establish rhythm and sequence throughout the house. The material's thermal mass also helps moderate indoor temperatures in Okinawa's subtropical climate.

## Visual permeability

The arrangement of concrete elements creates framed views and visual connections between spaces. Light filters through gaps between walls and columns, creating dynamic patterns that change throughout the day. This visual permeability enhances the sense of spatial continuity while maintaining necessary structural support. The design demonstrates how load-bearing elements can contribute to aesthetic experience.

## Contextual response

The design responds to Okinawa's climate and cultural context through its open yet sheltered spaces. The large roof provides protection from sun and rain while allowing natural ventilation. The blurred boundaries between inside and outside reflect traditional Okinawan architectural concepts. This contemporary interpretation maintains relevance to local building traditions while employing modern materials and techniques.

## Design implications

The project suggests alternative approaches to residential spatial organization beyond conventional room divisions. It demonstrates how structural elements can create rich spatial experiences without excessive complexity. The design offers lessons for architects seeking to balance order and flexibility in small-scale projects. This exploration of spatial ambiguity could influence future residential architecture in similar climates.

## Sources covering this story

- https://www.designboom.com/architecture/overlapping-concrete-walls-columns-inside-outside-okinawa-house-igarchitects/ — 

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_Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._