Concrete House

A concrete house is a home whose structure, and often its finished walls, floors and ceilings, are cast in concrete, usually reinforced with steel. Concrete gives a house weight, durability, fire resistance and the ability to span and cantilever, and when it is left exposed the formwork becomes the finish. The design challenge is making that mass feel warm, bright and comfortable to live with, and keeping its carbon cost in check.

What is a concrete house?

The term covers several ways of building. In the most common, a reinforced concrete frame of columns and slabs carries the loads and the walls are filled in with brick, block or glass. In others, cast walls themselves carry the house, as at Casa Macahuite in Oaxaca, where four load-bearing concrete walls and a single pergola define the whole plan. A third approach uses concrete only where it does the most work, in a plinth, a set of piers or a retaining base, with lighter timber or steel above.

What unites them is that concrete is poured wet into a mould, so its shape and surface are set by the formwork rather than by a module such as a brick. Plain concrete is strong in compression but weak in tension, which is why almost every house built today adds steel reinforcement to take bending in beams, slabs and cantilevers.

A concrete house is not the same thing as a style. Brutalist architecture was a movement, largely of public buildings and housing blocks, that made raw concrete expressive; minimalism is an attitude to reduction that often uses concrete but does not depend on it. This topic is about the material in the home: how it is cast, how it handles heat and light, how it meets the ground and how it can be made to feel lived in. Many of the houses below are as much about timber, brick and planting as about concrete.

A short history of the concrete house

Concrete is older than most people assume. Roman concrete built bridges, aqueducts, ports and the Pantheon in Rome, completed under Hadrian in the 120s AD, which still has the world's largest unreinforced concrete dome. MIT researchers reported in 2023 that lime clasts in the Roman mix let the material heal its own cracks, one reason these structures have survived for two millennia while many modern ones crumble in decades.

Reinforced concrete is a nineteenth-century French invention. François Coignet was the first to use iron-reinforced concrete as a building technique, and the gardener Joseph Monier patented wire-reinforced concrete flowerpots in 1867, followed in 1877 by a patent for reinforced columns and girders. In 1914 and 1915 Le Corbusier turned the new frame into an idea about houses. His Maison Dom-ino, a prototype for mass-produced housing during the First World War, reduced the house to concrete floor slabs on a few thin columns with a stair at one side. With no load-bearing walls, the frame was independent of the plan, which could be laid out freely. Many later concrete frame houses follow the same logic.

The exposed concrete house as a work of craft owes most to Tadao Ando. His Row House in Sumiyoshi, also called the Azuma House, was completed in Osaka in 1976. It has no exterior windows; to make up for the lost light, Ando cut an open courtyard with a walkway across it into the middle of the narrow plot.

"I create enclosed spaces mainly by means of thick concrete walls. The primary reason is to create a place for the individual, a zone for oneself within society."

Tadao Ando, quoted by the Pritzker Architecture Prize (1995)

Key principles of concrete house design

The formwork is the finish

Exposed concrete records everything that touched it. The Pritzker Prize notes that Ando attributes the quality of his concrete less to the mix than to the formwork: watertight, sometimes varnished timber shuttering, with the evenly spaced tie holes left by the bolts that hold it together. Board-formed concrete takes the opposite route and keeps the grain of rough planks on the surface. At Lomadas House in Pilar, Argentina, by Grizzo Studio, a heavy board-formed bar bends across the site and lands on two planted mounds.

Use thermal mass where it helps

Concrete stores heat and releases it slowly. That thermal mass helps most where the daily outdoor temperature swings around a comfortable point, as in deserts with hot days and cool nights. It can work against comfort in rooms used only occasionally, and it does little where heat keeps flowing in one direction for long periods. House Eighteen in Chihuahua, Mexico, by Pereda Han Estudio, answers a climate of blazing sun and cool nights with an exposed concrete ground floor, shade and inward-facing courtyards.

Make the mass porous to light and air

A concrete house feels heavy when it is sealed. La Flecha, by Estudio Feller Herc near Colonia del Sacramento in Uruguay, uses board-formed concrete as enclosure, open pergola and perforated screen, so light, air and the dune landscape pass through it. The grain of the timber formwork gives the grey surfaces a texture close to the weathered wood and dry grasses around them.

Warm it with timber, brick and texture

The most liveable concrete houses pair the material with softer ones. At Jabuticabeiras House in Goiânia, Studio Andre Lenza fills a low concrete frame with rust-toned timber slats that filter light and views from the street. In São Paulo, Memola Estúdio keeps the angular concrete shell of Cinco House and fills its four levels with brick, timber, tile and family heirlooms.

Let structure become furniture

Because concrete is cast, the same pour can make a wall, a bench and a basin. At Casa Macahuite near Puerto Escondido, Raquel Font of Studio Font continues the walls into the kitchen counter, basins and sofa bases, and leaves nothing clad, in a region of earthquakes and hurricanes. Her Nereidas House near Todos Santos casts beds, benches, storage and bathrooms in pink pigmented concrete and runs off-grid.

Concrete houses on uni.xyz

The uni.xyz journals follow concrete houses across very different climates and sites, and they share a habit of reading each project through how it meets the ground.

Xingu House by TETRO Arquitetura, led by Carlos Maia, Débora Mendes and Igor Macedo, is an 1,800 m² residence in Nova Lima, outside Belo Horizonte. Its main volume rises about six metres above the ground and splits into three cantilevered wings. It stands on six thick board-formed concrete pillars that also hold the bathrooms, staircase, elevator and service rooms, so the slope, the inherited stone walls and patches of Atlantic Forest stay almost untouched below.

R.I. House, completed in 2024 by Infante Poblete Montt under lead architect Gerardo Infante R., is a 400 m² lookout on El Morro hill above Zapallar Bay in Chile. It gives each material one job: board-formed concrete projects outward and frames the view, while grey stone holds the hill. The house steps down the slope in long horizontal bands, all facing the bay, and gravel roof bays and a pergola turn the top of the building into a fifth facade for the neighbours who look down on it.

In Braga, Portugal, House A by L2C Arquitetura, led by Luís Cunha with Rui Forte, sets two staggered concrete volumes into a steep slope as terraces, in the regional tradition of socalcos. At Vão House in Maresias, Brazil, Studio Carlito e Renata Pascucci lift a 165-square-metre timber house on concrete piers so that existing trees and their roots survive. The clients' brief was simply to keep the vegetation, and the narrow linear plan avoids clearing the canopy, placing the rooms at the level of the treetops rather than beneath them.

The Rangunia Residence by Moofer Architecture, under lead architect Md. Fahad Rahman, is a 4,500 ft² brick and concrete house near Chattogram, Bangladesh. Its editors note that most new semi-rural houses there are a reinforced concrete frame with flat roofs and tinted glass; this one borrows the working principles of the village homestead instead: shade, filtered light, water close to living space and outdoor rooms.

"The result is a heavy house that does not feel sealed off from the dunes around it."

UNI Editorial, on La Flecha by Estudio Feller Herc

In São Paulo, Felipe Hess Arquitetos' Jacarezinho II House covers only about 40 percent of a corner lot in brick, timber and concrete, leaving a garden of around 600 m² as the main room of the house.

Challenges and future directions

Concrete's biggest problem is carbon. The environmental impact of concrete is driven by cement, whose industry is one of the two largest producers of carbon dioxide, creating up to 8 percent of global emissions. Most of that comes from clinker, which is fired at around 1,500 °C. One established response is to replace part of the clinker with by-products such as fly ash and slag. Another is a new class of blended cements: LC3, limestone calcined clay cement, is reported by its research project to cut CO2 emissions by up to 40 percent using limestone and low-grade clays. For houses, the simplest lever is to use less: thinner slabs, fewer cantilevers for their own sake, concrete only where mass or durability earns its place.

Member work is already testing this. House A by Zekai zhong revolves around low carbon and environmental protection and tries to make a building closely related to nature. For more on alternative mixes, see eco-concrete.

Concrete houses for students and designers

A concrete house is a good thesis vehicle because every decision is visible. Promising angles include a low-clinker house that documents its mix and measures its embodied carbon, a study of formwork as a design tool (boards, plywood, fabric, reusable systems), a desert or monsoon house that tests where thermal mass actually helps, or a renovation that keeps an existing concrete shell and changes everything inside, as Cinco House does. Draw sections, not just facades: the way a concrete house meets the ground tells you most about it. Look for housing and material briefs on uni.xyz competitions, and compare your work with the raw concrete of brutalism and the restraint of minimalism without copying either.

Frequently asked questions

Are concrete houses energy efficient?

They can be. Thermal mass smooths daily temperature swings, which helps most in climates with hot days and cool nights. It needs good insulation, shading and ventilation alongside it; on its own, concrete is not an insulator.

How do you make a concrete house feel warm?

Bring daylight deep into the plan, add timber in ceilings, screens and floors, and use textured finishes such as board-formed surfaces. Houses like Jabuticabeiras and Cinco House pair a concrete frame with timber, brick and tile.

What is board-formed concrete?

It is concrete cast against rough timber boards, so the grain and joints of the formwork stay on the finished surface. It gives walls a texture and scale that smooth concrete lacks.

What is Tadao Ando's Azuma House?

It is the Row House in Sumiyoshi, a small exposed concrete house in Osaka completed in 1976. It has no exterior windows and gets its light from an open central courtyard crossed by a walkway.

Can a concrete house be low carbon?

Lower, at least. Use less concrete, replace part of the cement with materials such as fly ash, slag or calcined clay, and design the house to last a long time.

References and further reading

• Tadao Ando, 1995 Laureate, The Pritzker Architecture Prize
• Riddle solved: Why was Roman concrete so durable?, MIT News
• Reinforced concrete, Wikipedia
• Dom-Ino House, Wikipedia
• Row House in Sumiyoshi, Wikipedia
• Thermal mass, Wikipedia
• Environmental impact of concrete, Wikipedia
• LC3: Limestone Calcined Clay Cement, LC3 Project