In the town of Sabadell, northwest of Barcelona, ​​115ARI is a single-family home, designed by the architecture practice Vallribera Noray Arquitectes, that sits on a narrow plot just 3.8 meters wide. The proposal's challenges were to overcome the limited space available on the site and take advantage of the excellent orientation and the presence of a large courtyard, elements that enable a change in lifestyle for the family living there.

As an initial premise and challenge, the project should not be confined painfully within the neighbours' party walls. Therefore, the built volume extends to the maximum limit allowed within the plot and proposes a large void in the center, creating an interior courtyard that articulates and organizes the main rooms of the house.

Vallribera Noray Arquitectes' proposal makes vertical circulation the main focus of interior activity, thanks to the natural light that bathes the steps from a skylight. The kitchen, dining room, and study are located on one side of this transitional space, while a game room, bathrooms, and laundry room are located on the other.

The construction uses a mixed system that harmoniously combines wood and traditional masonry, complementing the different heights present within the interior and generating welcoming, bright spaces that dissolve the elongated proportions of the site. Having strategically overcome the main initial challenge—building on a narrow plot in Sabadell—the house is a spacious, bright, and welcoming home that adapts to the contemporary needs of a family who recognized the hidden virtues of the plot on time.

115ARI, new row house in Sabadell by Vallribera Noray Arquitectes. Photograph by José Hevia.

115ARI, new row house in Sabadell by Vallribera Noray Arquitectes. Photograph by José Hevia.

Project description by Vallribera Noray Arquitectes

When the family first showed us the plot, they did so with some skepticism. “Are you sure a house can fit here? It’s such a narrow site,” they said. But beyond these doubts, they also understood that this parcel offered the chance to change their lives, and they trusted us with the challenge.

The plot was one of the narrowest and longest we had ever come across: just 3.80 meters wide, flanked by very tall neighboring houses. Yet it also had excellent orientation, a large courtyard, and a family determined to build a home that would bring them closer to the lifestyle they were seeking. We quickly accepted the challenge and, only a few days later, began working on the project.

115ARI, new row house in Sabadell by Vallribera Noray Arquitectes. Photograph by José Hevia.

To prevent the new house from feeling trapped between the party walls, we built to the full depth allowed by regulations. But since the family didn’t need such a large home, we carved out the central section, placing the main rooms between this inner courtyard and the façades.

At the highest point of the house, an interior façade opens onto a vertical void and a generous
skylight, which connect all floors and flood the heart of the home with natural light. The program is organized around this central space: on one side, the kitchen, dining room, and study; on the other, a playroom, bathrooms, and laundry. The exterior façades are reserved for the three bedrooms.

115ARI, new row house in Sabadell by Vallribera Noray Arquitectes. Photograph by José Hevia.
115ARI, new row house in Sabadell by Vallribera Noray Arquitectes. Photograph by José Hevia.

We opted for a mixed construction system that combines timber with traditional masonry. The solid wood ceilings are built with interlocking beams, allowing phased assembly and finished with just a protective varnish. The roof and façades use light timber framing, clad with birch plywood panels left exposed. Exposed brickwork is reserved for the inner façade, terraces, and transitional spaces that connect with the outdoors.

These semi-exterior areas are treated like galleries. Brick walls and tiled floors invite the presence of plants, blurring the boundary between inside and outside. This strategy not only enhances natural light—especially through the dining room skylight—but also softens the perception of depth, creating a sense of openness despite the narrow proportions. The combination of materials and varying interior heights results in quality spaces at the very center of the house.

All these design choices follow passive construction principles to optimize energy performance. In winter, the south-facing openings and skylight act as natural solar collectors; the brick walls and ceramic floors store heat during the day and release it at night. In summer, overhangs and adjustable shutters block direct sunlight, while the skylight enhances cross-ventilation and nighttime cooling.

115ARI, new row house in Sabadell by Vallribera Noray Arquitectes. Photograph by José Hevia.
115ARI, new row house in Sabadell by Vallribera Noray Arquitectes. Photograph by José Hevia.

Thanks to these passive systems and proper insulation, the house eliminates the need for heating or mechanical cooling. Instead, photovoltaic panels supply most of its annual energy demand.

Today, all the doubts about this narrow, elongated site have vanished. In its place stands a spacious, bright, and comfortable home, perfectly aligned with the lifestyle of a family who knew how to recognize the hidden virtues of an unlikely opportunity.

More information

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Architects
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Vallribera Noray Arquitectes. Lead Architects.- Llorenç Vallribera Farriol, Aleix Gil Noray. 

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Project team
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Architect.- Sergi Ballester.
Quantity surveyor.- Joan Fontanet.

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Collaborators
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Structural consultant.- Míriam Molina.
Energetic and environmental consultant.- Daniel Vilavedra.
Infographic.- Nacho Villegas.

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Developer
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Private.

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Area
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175 sqm.

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Dates
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Project year.- 2022.
Construction year.- 2023-2024.

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Location
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Sabadell, Barcelona, Spain.

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Photography
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José Hevia.

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Rendering
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Ignacio Villegas.

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Vallribera Noray Arquitectes is an architecture firm sit in Sabadell. The founding partner is Llorenç Vallribera Farriol. It was estableshed in 2012 and in 2019 Aleix Gil Noray joined as a partner. They focus on the design of both reforms and new works of isolated houses and between party walls. Its objective is to provide each project with beauty and comfort. The success of his trade is the use of energy efficiency, custom design, optimization and cost control as fundamental tools.

They were selected in the Transition category of IX edition of the 2016 Rosa Barba International Paisatge Award, they won the X NAN Architecture and Construction Awards 2016 in the residential construction category and the BUILD Architecture Awards 2018 by Best Residential Architecture Company - Barcelona Most Efficient & Customized Interior Design Company.

Llorenç Vallribera is an architect and founding partner at Vallribera Arquitectes. Handball, music and drawing are the hobbies that take his mind off architecture and design.

Llorenç earned his degree in architecture from the Vallès School of Architecture (ETSAV, 1995-2003). In 2000, he was awarded an Erasmus scholarship from the Universitat Politècnica de Catalunya (UPC) to study at the Helsinki University of Technology (HUT).

From 2000 to 2008 he was a collaborator with different architecture studios, including Espinet Ubach Arquitectes, ONL Arquitectura, and TAC Arquitectes. In 2006, he began developing his own designs, and in 2012 he founded Vallribera Arquitectes.

If he had to choose just one hobby, it would come down to music or handball. Years of training and playing the drums have taught him that learning takes hours of practice and dedication. But what would practice be without the excitement of a concert, and what would training be without the challenge of a game?

Llorenç is detail oriented and a perfectionist. When it comes to his work, he likes things to be resolved and well done. He knows that achieving success takes a mixture of audacity, humility, perseverance and talent. He believes that, in architecture, like when a concert goes well or when you win game, all the effort is worth it when it makes life better in the environments we build.

Aleix Gil is an architect and partner at Vallribera Arquitectes, he loves the mountains and climbing; he is an all-around mountaineer.

Aleix earned his degree in architecture from the Vallès School of Architecture (ETSAV, 2005-2012). In 2009 he was awarded an Erasmus scholarship from the Universitat Politècnica de Catalunya (UPC) to study at the Budapest University of Technology and Economics (BME).

In 2012, he began working at Vallribera Arquitectes, and through 2014 he also collaborated with MVA Arquitectura i Estructura. In 2015, he put all his efforts into becoming a Lead Designer at Vallribera Arquitectes. Four years later, in 2019, he became a partner at the firm.

Aleix’s first passion is clear: architecture. The second is also clear: the mountains. He likes climbing, downhill skiing, and mountaineering  – activities that have taken him many places, although if you ask him, no doubt he will tell you that his favorite place is Montserrat.

Aleix is a warm, friendly and easygoing person, who only speaks when it is truly necessary. His love for nature and his commitment in the face of a challenge show through in his work, his passions, and how he approaches life every day.
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Published on: September 13, 2025
Cite:
metalocus, AGUSTINA BERTA
"The challenge of shedding light on a narrow plot. 115ARI by Vallribera Noray Arquitectes" METALOCUS. Accessed
<https://www.metalocus.es/en/news/challenge-shedding-light-narrow-plot-115ari-vallribera-noray-arquitectes> ISSN 1139-6415
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