OS House

Front view of the dark, low house beneath its planted roof, with the sea behind it.
© NOLASTER

OS HOUSE

Nolaster

ARCHITECTS
Nolaster

AREA
360.0 m2

YEAR
2005

LOCATION
Ribamontán al Mar, Spain

CATEGORY
Houses

The architecture project is presented under the following conditions. A couple bought one of the few available plots on the Bay of Biscay coastline.

After scouting every seaside village from Plentzia to San Vicente de la Barquera for nearly a year, they found the place they where looking for in a residential estate from the 1970's near Loredo, a summer resort outside of Santander.

Angled view of the dark house and planted roof amid coastal grass and paving.
© NOLASTER
Deck chairs on the grassy roof terrace with the sea beyond.
© NOLASTER
Exterior stairway beside a dark-clad façade and window, with planting along the steps.
© NOLASTER

The plot slopes downwards and is cut by a 30 meter-high cliff against which the waves break. The Northern sea wind is very rough, making it hard for trees to grow by the coastline.

Whenever someone new to the area arrives, they wonder why the house faces south and gives its back to the sea.

The house’s dark, boxlike exterior and green roof seen from the coastal landscape.
© NOLASTER
A recessed opening in the planted roof reveals part of the house, with stairs rising to the roof terrace and the bay beyond.
© NOLASTER

Southern orientation and the sun are most appreciated by people from the highlands who come around to buy a holiday house, while the sea is just obvious.

"We, on the contrary, came from far away looking for the sea, the wind, the waves, and therefore decided to get plot number 21, even if going against the tide".

Covered outdoor terrace with a black railing, small tables and views across coastal vegetation to the sea.
© NOLASTER
Open ground-floor living area with seating beneath the raised house and glazing onto the garden.
© NOLASTER

The plot size is 90 x 50, 4500 m2 and 8% building rate, that is, 360 square meters. Basement not included. Maximum height is 3 meters eaves, 6 meters total.

Distance to the lateral edges 10 meters, and 12 to the back street axis. 11 meter drop. 30 minute walk to Langre Beach and 10 to the eastern end of Puntal Beach, whose opposite end closes the Santander Bay.

Long living room with floor-to-ceiling windows facing the coastal landscape, a white sofa and red armchair.
© NOLASTER
A family reads together on the floor beside bookshelves and a lounge chair in the bright living room.
© NOLASTER

Bay of Biscay horizon from Cabo Mayor, to the west, all the way to Cabo de Ajo, to the east.

A new topography is defined in order to protect a rear south garden from the strong and persistent sea wind.

Bedroom opening onto a tiled bathroom, where an adult helps a child in the bathtub.
© NOLASTER
Ground-floor interior with slender support columns, a stair beside planted ground and a car visible through the opening.
© NOLASTER

The building is enclosed in a squared prism (22x22 m), measuring three and a half meters in height.

The most exposed façade of the house is the green roof.

The main program develops in the first floor, over a ground floor that consists of garage, facilities, storage, porch and south garden.

Dining area with a round table and colorful chairs beside large windows facing the coast.
© NOLASTER
Bright bedroom with a white bed, wood-patterned floor and an open view toward the adjoining bathroom.
© NOLASTER
Bathroom vanity and toilet behind sliding panels, with a curtain opening toward the sea-facing glazing.
© NOLASTER

None of the pieces over the roof is higher than the horizon line seen from the street.

The desire to interfere as little as possible with the visual topography of the landscape prompted to attach the house to the ground and find façade and roof solutions with a direct relationship to the surroundings.

The idea of a "crouching building" guides the decisions concerning volume, position, occupation, exterior outfit and façade claddings.

A woman and two children gather around a movable table beside the kitchen island in OS House, designed by Nolaster.
© NOLASTER
View through black-framed sliding glass doors into a room where a child sits on the floor.
© NOLASTER
Interior corridor with glass walls, opening toward a red chair and a bright window; an exterior stair is visible at left.
© NOLASTER

The property requires a holiday house program (though it will surely become the owners' permanent home in a future), able to adjust to changes related to the number of users, the season, and so on.

This complex program (couple, family, friends; summer, winter; weekend, long terms) is solved attending to values of low energy, spatial simplicity and flexibility of use.

The house's program, arranged in bands perpendicular to the longitudinal plot axis, is as follows (starting with those areas closer to the sea):

Long, low house glowing through its windows at dusk, set into a dark grassy slope.
© NOLASTER
OS House at dusk, with a dark upper volume above a lower level and a long glazed façade.
© NOLASTER

living/dining/library + office; Santander room + bathroom + toilet/storage + kitchen + double bathroom + multiview room; vertical patio + north hall + access patio;

introverted room + indiscreet bathroom + brief space + flexible space + open bathroom + tub room; void patio + south hall + fern patio; multiple room + bathroom + south raised living + bathroom + no vacancies room. OS HOUSE is ready.

Rocky coastline and sea at dusk beneath a cliff-top horizon.
© NOLASTER


Site plan showing the coastline, cliff edge, contours, and a road beside the house plot.
Ground-floor access plan showing the broad paved area, two parked cars, stairs, and house footprint.
Main-floor plan showing rooms arranged around patios and circulation spaces.


Longitudinal section drawing of the house set into a sloping site, with trees and planted roof areas.
Two elevation drawings showing the low house, planted roof, and sloping ground.
Two elevation drawings of the house, with a planted roof above a partially recessed lower level.


Diagram of the OS House’s 30 basic spaces and their connections, including living areas, patios, and flexible rooms.
Landscape and building diagrams illustrating the house’s relationship to the slope, planted ground, and roof.


Three wall-section details showing façade and roof assemblies, with a human figure for scale in the center drawing.
Three building-section details showing roof, wall, and patio assemblies, with a seated figure in the right drawing.