Just a few blocks from Ibirapuera Park in São Paulo, the Rua 141 Arquitetura team was commissioned to design a single-family home on a previously developed lot. Located on a unique and unusual cul-de-sac, its proximity to the park was what captivated the 33-year-old triathlete couple who purchased the property.

The design brief stipulated that five bicycles should be given special prominence, integrated into the house as if they were works of art. Furthermore, the clients paid particular attention to maintaining a close connection with nature and incorporating ample social spaces where they could gather with friends.

The original building had very compartmentalized spaces with little natural light. This led Mona Singal, the architect in charge at Rua 141 Arquitetura, to demolish it and build a new house from scratch. The project resulted in a house of approximately 135 m² organized on three levels: ground floor, first floor, and an accessible rooftop terrace.

The small size of the lot and the need for a quick construction time motivated the choice of a metal structure, a cleaner, more flexible, and agile solution. Although a complete renovation was planned, only the structural brick party walls were preserved.

In the center of the house, a courtyard with a native tree acts as a thermal regulator while visually expanding the interiors, blurring the boundaries between inside and outside. In this way, on a narrow, small plot, the design manages to create a bright, welcoming, and spacious home.

Casa MA por Rua 141 Arquitetura. Fotografía por Fran Parente.

House MA by Rua 141 Arquitetura. Photograph by Fran Parente.

Project description by Rua 141 Arquitectura

The little house located in a charming dead-end street close to Ibirapuera Park has fascinated a couple – both 33 and triathletes. He works in the insurance area and is also an actor, and she is a businesswoman. The lifestyle they aimed was to live next to the park, where they practice. After buying the house, they contracted RUA 141 Arquitetura by Mona Singal to develop the challenging project in a 4x18m site.    

Dead-end streets have been more and more rare in a sprawling metropolitan area. The couple used to rent a house in the neighborhood when the opportunity to buy one appeared. They wanted to have a cozy house in an industrial style totally integrated to nature, where they could gather friends and in the future the kids could enjoy it together with Moleque, the dog.

House MA by Rua 141 Arquitetura. Photograph by Fran Parente.
House MA by Rua 141 Arquitetura. Photograph by Fran Parente.

One of the main requests was to consider their five bikes right from the start of the project so that they would be integrated to the house as well as highlighted as pieces of art on the walls.

The existing attached house was a sectioned construction with unused dark spaces, low high walls and small frames.

“The heavy concrete stairs were a rupture in the social area and occupied most part of it.”
Mona Singal, architect.

House MA by Rua 141 Arquitetura. Photograph by Fran Parente.
House MA by Rua 141 Arquitetura. Photograph by Fran Parente.

After some visits to the house, the clients decided to demolish it and build a new one.

A race against time started because the first baby was on the way. The small size of the site was a huge challenge in order to meet all the needs. Therefore, a metal structure was chosen mainly because it is a faster and cleaner option. The only walls that were kept were the neighboring structural brick ones.

The final constructed area is 135 sqm and it took one and a half year to be finished. The house is divided into three levels: ground, first floors and the rooftop, distributed in two blocks connected by metal passageways.

A garden was projected at the heart of the house holding a native Araça tree, which brings thermal comfort and a beautiful view for the bedrooms.

House MA by Rua 141 Arquitetura. Photograph by Fran Parente.
House MA by Rua 141 Arquitetura. Photograph by Fran Parente.

The integration on the ground floor of different uses has been essential for bringing natural light and cross ventilation, providing the sensation of openness, once the site is very narrow.

The multiple-use concrete shelf is a key element in the project. It starts in the living room as a bench, and at the same time composes with the rebars of the shelves, also limiting the space of the two bikes, which the couple has chosen to highlight. It finishes in the kitchen as the countertop, integrated with the dining room.    

The industrial style is ubiquitous. The metal black beams and columns contrast with the texture of the original bricks painted in white. The lighting in rails and the apparent electrical installations reinforce this identity. The stairs in folded metal sheet with railings in perforated metal connect the floors. On the other hand, the herringbone Tauari wood floor and the frames in Freijó wood bring warmness to the house.      

House MA by Rua 141 Arquitetura. Photograph by Fran Parente.
House MA by Rua 141 Arquitetura. Photograph by Fran Parente.

White bricks, frames in Freijó wood and slatted venetians design the façade and welcome passers-by. Entering the house, it is possible to see the main block with different social uses connected such as the living room, kitchen, dining room and garden. The lavatory, office and storage are in the second block on the ground floor. Thus, the couple may have some privacy to work overlooking the garden. There are also two bikes on the wall by their request.

The light metal stairs provide access to the first floor, where the family area was designed. Under the stairs, a bar in concrete was projected continuing one of the metal steps to be used as support furniture piece.

On the first floor the master suite and the bathroom are connected by the linear corridor. A zenithal skylight was designed to bring in natural light and a piece of the sky into the house. The brick texture was highlighted when the layer of plaster was removed from original walls. The Tauari wood floor is herringbone pattern paginated.

House MA by Rua 141 Arquitetura. Photograph by Fran Parente.
House MA by Rua 141 Arquitetura. Photograph by Fran Parente.

The doors in Freijó wood go up to the ceiling with integrated handles bringing in a sensation of higher walls. The huge sliding window in the master suite overlooks the main façade. In the master bathroom, light pink hydraulic tiles and burn cement create a rustic and artisanal atmosphere, the zenithal skylight allows natural ventilation and lighting.    

The other two rooms have big folding slatted venations that offer the view of the treetop in the garden. The same concept as the master suite´s was used in the kids´ bathroom – burn cement and hydraulic tiles in green shade on the floor. The second daughter´s bedroom is across from the metal passageway.  

Going upstairs there is the rooftop, one of the main areas of the project. It is accessed by a motorized sliding metal and glass structure, which allows the passage of natural light through the stairs.  

House MA by Rua 141 Arquitetura. Photograph by Fran Parente.
House MA by Rua 141 Arquitetura. Photograph by Fran Parente.

A gourmet area and a cozy external living room are surrounded by flower beds, creating a small oasis bringing privacy and close contact to nature, once the houses are attached. The service area and the lavatory are on the other side of the metal passageway. Both areas are ventilated and lighted by the zenithal skylight.    

More information

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Architects
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RUA 141 Arquitetura. Lead Architect.- Mona Singal.

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Collaborators
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Landscaping.- Seiva.
Metal work.- Arte Fatos.

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Builder
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J.B. construção.

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Area
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135 sqm.

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Dates
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2025.

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Location
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Near Ibirapuera Park, in São Paulo, Brazil.

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Manufacturers
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Wood floor.- Melvino pisos de madeira.
Woodwork.- Carvalho movelaria.
Fitting and fixtures.- Deca.
Wood frames.- Madeira art.
Hydraulic tiles.- Dalle Piage.
Exposed aggregate concrete floor.- Granitorre.
White bricks.- Pedra paulista.
Stairs floor lighting.- Adriana Yazbek.
Curtains.- Casa Fortaleza.
Sofa, chairs, dining table, stools, bistro table.- Cremme.
External area ottoman.- Srta Galante.
Coffee table and armchair.- Prototype.
Rug.- Botteh.
Floor and table lighting.- Wentz.
Master suite bench.- Gustavo Bittencourt.
Linen.- Casa trópico.
Cushion and master suite knit blanket.- Olho moveis.
Cushions and kids knit blanket.- Codexhome e Coisas de doris.
Kids room pictures.- Less design.
Kids room rug, chair and ottoman.- Deezign.
Dining, living room and master suite paintings.- Quel Casadei.
External area chairs and side tables.- Wooding.
Objects.- In Casa, Dpot objetos e Olho moveis.
Wood boards.- Na rosembaum e O designer artesão.
Master suite single bench.- Oiamo.

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Photography
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Rua 141 Arquitectura was founded in 2015 by architect and urban planner Mona Feldman Singal. In their professional development, they approach their projects collaboratively, based on horizontal relationships that bring together professionals from different specialties.

This network approach allows for the development of conceptual proposals, rich in meaning and creativity, while also facilitating exchange between professionals from different cities.

The result is that each intervention is carried out uniquely, according to the needs of each client. The work is performed with care and transparency, from the initial project conception to the completion of the construction.

Rua 141, a name that may initially seem like an address, represents much more than that. The street is understood as a connecting element, present in large cities, that links diverse places and forms a network of different scales and identities. In this sense, the street reflects the connection that exists between the projects they develop and their social responsibility as architects.

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Published on: December 12, 2025
Cite:
metalocus, AGUSTINA BERTA
"Living large on a narrow lot. House MA by Rua 141 Arquitetura" METALOCUS. Accessed
<https://www.metalocus.es/en/news/living-large-narrow-lot-house-ma-rua-141-arquitetura> ISSN 1139-6415
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