Red house, designed by EXTRASTUDIO, is located in a small village in Azeitao, south of Lisbon.
Protected by hills from the Atlantic Ocean, the area has a mild Mediterranean microclimate, creating the ideal conditions for growing grapes, producing some of the country’s finest wines.


Preservation of the orchard of orange trees determined the whole project.
In order to retain the trees, it was necessary to keep the existing building and accept that the two sides of the house, which border adjacent properties, would have no windows.


A courtyard was inserted into the corner abutting the adjacent properties, allowing light to enter the darkest areas of the house.

The public areas of the house are arranged on the ground floor, occupying the entire footprint. The private areas unfold on the upper level, flanking the facades, generating a sequence of strategically placed voids, which create double and triple height spaces on the ground floor below.
The generous scale recalls the building’s former use.

A white floor reflects daylight in the interior, mirrored walls make spaces seem infinite, trapped between reflection and reality, while sliding windows open the entire living room to the garden on hot summer nights.


All existing materials were preserved and upcycled during construction; the old roof tiles were reused, stone was transformed into sills, the timber roof structure became an exterior deck.

To make old and new mortars compatible, a lime mortar was developed by a local company working with millennial techniques, combining pure lime with pozzolans. Once it is exposed to oxygen in the air, the mortar will begin to petrify, slowly turning into stone.

A natural red pigment was added to the mortar, to reinforce the building’s presence, allowing the house to age gradually and changing its tonality, without ever requiring a coat of paint. Over the days and months, the colour of the house alters, lighter or darker depending on the humidity, almost black when it rains.

To accentuate the house’s Mediterranean character, EXTRASTUDIO insert a reflecting pool in the garden. Raised above the ground recalling an old irrigation tank, the black pool mirrors the sky. Since it is not possible to distinguish limits or edges, swimming here is a primordial act; the body in water floats in an absolute void.
In May, when the scent of the orange trees fills the night air, the aroma is intoxicating.
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Facts & Credits:
Title: Red house
Program: Single family house, 360 m2
Location: Vendas de Azeitão, Portugal
Budget: € 220.000
Client: private
Year: 2011-2016
Architecture: EXTRASTUDIO / João Caldeira Ferrão, João Costa Ribeiro, Madalena Atouguia, Daniela Freire, Maria João Oliveira, Sónia Oliveira, Tiago Pinhal, Rita Rodrigues
Landscape architecture: Oficina dos Jardins / Sónia Caldeira, Ines Bordado
Consultants: PRPC Engenheiros lda (structural engineering, plumbing, gas, building physics and acoustics), Mário Andrade (electrical), Gonçalo de Meirelles (gas)
Contractor: Sequeira e Serra lda
Photo credits: Fernando Guerra | FG+SG and EXTRASTUDIO
About EXTRASTUDIO
EXTRASTUDIO is a Lisbon based architecture practice established in 2003. The office develops small and large projects with programs ranging from housing to retail and public space.
EXTRASTUDIO embraces complexity and diversity, and is interested in dealing with heritage, urban regeneration and environmental issues.
Design is the result of context and ingenuity. Architecture is the dialogue between condition, performance and character.
The research for new materials and unconventional construction techniques is the quest for unmistakable solutions, resulting from the process, team work and passion. EXTRASTUDIO develops culturally relevant projects, engaging the public, the environment and the urban context with architecture, creating value from banal elements.
In recent years EXTRASTUDIO has received public commissions for the design of waterfront and urban parks, and has also worked with private clients on the design of mixed used buildings and houses.
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