The Grasshome is a new single-family home designed by the EME157 architecture studio in Collado Mediano, a town located in the northwest of the Community of Madrid, Spain. The location overlooks the southern slope of the Guadarrama mountain range, offering spectacular views from the building.

What looks like a slate-roofed cottage is actually an experimental home that follows bioclimatic principles and offers an undefined layout. Thanks to the lack of interior partitions and the pre-installation of plumbing and electricity, it is possible to easily create various layouts. This means that the house can be adapted to the needs of any buyer.

EME157 adapted the house to the sloping topography of the land, placing it above and below ground level. The interior is accessed from the first floor, where there is a large terrace and stairs leading down to the ground floor, where there is another terrace and a 20-metre swimming pool. From any level, you can enjoy a panoramic view of the entire landscape thanks to the large south-facing windows that frame the natural surroundings.

The ground floor is constructed of reinforced concrete panels with a 20 cm thick polystyrene core. This heavy solution contributes to soil containment and greater thermal insulation. In contrast, the first floor has a lightweight structure of long-span metal trusses. The terraces have eaves to provide passive protection from the sun, as do the opaque cork walls on the north, east and west sides, which also generate greater inertia inside.

The Grasshome by EME157. Photography by Luis Asín

The Grasshome by EME157. Photography by Luis Asín.

Description of project by EME157

The Grasshome is the result of a collaboration between EME157 and the construction company LUMAN, the developer of this experimental single-family home for sale.

Experimental in that it features an open-plan, simple, spacious, and bright layout, with no defined rooms, and a basic interior design that includes a kitchen, a bathroom, a laundry room, and mobile modular closets, designed to facilitate adaptation to the needs of the end buyer. With several layout options, it's easy to implement thanks to carefully planned plumbing and electrical pre-installations. With a simple renovation, the home can be adapted to the buyer's lifestyle.

It is located on a plot with privileged views of the southern slopes of the Sierra de Guadarrama, with unbeatable panoramic views.

The Grasshome by EME157. Photography by Luis Asín
The Grasshome by EME157. Photography by Luis Asín.

Given the steep natural slope of the land, the home adapts to two different construction situations: below ground and above ground, which significantly influences the project. The ground floor, below ground level, is built with reinforced concrete panels with a 20 cm thick expanded polystyrene core. This system not only resists the earth's pressure and supports the upper floor, but also provides superior thermal insulation and eliminates thermal bridges. The upper floor, above ground level, is built with a dry system based on long-span metal trusses, creating a continuous and open space.

The home's design also follows the principles of bioclimatic architecture, incorporating a large, horizon-facing terrace on the first floor and passive solutions that guarantee thermal comfort and energy efficiency year-round. Large south-facing windows capture solar radiation in winter, maximize natural light, and reduce energy consumption. Strategically designed eaves block sunlight in summer and allow it in during winter.

The Grasshome by EME157. Photography by Luis Asín
The Grasshome by EME157. Photography by Luis Asín.

The opaque natural cork enclosures on the north facade, and slate on the east and west, provide protection from the summer heat and minimize energy loss in the cold months.
Both pedestrian and vehicle access are through the north facade of the upper floor. From there, the house appears as a discreet gabled slate cabin, concealing a striking home that grows downwards.

The parking lot occupies the first platform from the street, and pedestrian access is via a lower platform with a garden area, where the main cork door is located. To the south, a large cantilevered concrete terrace surrounds the house.

The Grasshome by EME157. Photography by Luis Asín
The Grasshome by EME157. Photography by Luis Asín.

Inside, we find an industrial-looking space with metal trusses and a sloping wooden ceiling, completely open-plan with large windows overlooking the magnificent views. The staircase is located in the center, dividing the space: on one side, the living room, kitchen, and dining room, and on the other, the modular closets. This wing could be divided into one or two bedrooms with a bathroom.

On the ground floor, there is an open-plan room with a large window overlooking the views, a bathroom, a laundry room, and access to a landscaped porch with a 20-meter pool overlooking the grounds.

The areas in contact with the house have been landscaped with landscaping that is respectful of the environment and suitable for hillsides. On the east facade, an exterior staircase connects the access to the pool area and the rest of the garden.

More information

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Architects
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EME157. Lead architects.- Silvia Méndez-Vigo Chillida, Gerardo Macarrón Jaqueti.

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Builder
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LUMAN.

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Developer
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LUMAN.

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Dates
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2025.

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Location
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Collado Mediano, Community of Madrid, Spain.

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Photography
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EME 157 is an architectural studio founded in Madrid by architects Silvia Méndez-Vigo Chillida and Gerardo Macarrón Jaqueti in 2002.

The studio's architecture is characterized by the interplay of solids and voids, the search for natural light and sustainability based on an understanding of the location and the client's needs.

The studio works on new construction, renovation, exterior, landscaping and furniture design projects. Through constant contact with the client, each project seeks to provide a fully personalized response adapted to the location and the user.

Read more
Published on: September 19, 2025
Cite:
metalocus, IRENE ÁLAMO MARTÍN
"Above and below ground. The Grasshome by EME157" METALOCUS. Accessed
<https://www.metalocus.es/en/news/above-and-below-ground-grasshome-eme157> ISSN 1139-6415
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