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25 Green (25 verde)-Urban Treehouse

Amongst the city streets of Turin sits an oasis of green forest disguising a five-storey apartment building. Luciano Pia designed the building as an attempt to protect residents from noise and air pollution. There are 63 residential units in the building and they are all different and fitted with wide terraces of irregular shapes that surround the trees. The last floor is covered with private green roofs. The green is diversified: big vases on the terraces, court gardens, green walls and roof gardens just in front of the lofts.

25-Green-25-verde-Urban-Treehouse-By-architetto-Luciano-Pia-02-Beppe-Giardino-759x380 25 Green (25 verde)-Urban Treehouse / architetto Luciano Pia

© Beppe Giardino

The fairy-tale building creates a transition from outdoors to in, with 150 trees that absorb close to 200,000 litres of carbon dioxide an hour, filtering out exhaust fumes and street noise. This means residents have clean, fresh air and a relaxing tranquil environment. With the change of the seasons, the trees create a microclimate inside the building, regulating temperature by blocking out the heat of the sun in the summer and letting in warm light in the winter.

25-Green-25-verde-Urban-Treehouse-By-architetto-Luciano-Pia-07-Beppe-Giardino 25 Green (25 verde)-Urban Treehouse / architetto Luciano Pia

© Beppe Giardino

Building Features:

  • There are 63 units, each with a terrace. The exterior gardens have been designed with carefully chosen plants to offer a seasonal variety of colour, foliage and flowers.
  • The steel structure houses 63 unique apartments and contains irregular-shaped terraces and pools lined with trees. The “green” theme continues on the roof, which is covered by lush gardens.
25-Green-25-verde-Urban-Treehouse-By-architetto-Luciano-Pia-11-Beppe-Giardino 25 Green (25 verde)-Urban Treehouse / architetto Luciano Pia

© Beppe Giardino

  • The ponds in the courtyard provide residents with a refreshing place to relax in the summer, and the 150 deciduous trees, which lose their trees in the winter, allow light to filter in to the building during the darker months. The building helps keep the city’s air cleaner and isolates the residents from the urban sounds and smells surrounding them.
  • The trees enhance the building’s appearance and filter about 200,000 litres of carbon dioxide from the air every hour. What’s more, noise from the street is muffled. In the summer and autumn, the leaves provide pleasant shade, preventing the 63 apartments from becoming too hot.
25-Green-25-verde-Urban-Treehouse-By-architetto-Luciano-Pia-13-Beppe-Giardino 25 Green (25 verde)-Urban Treehouse / architetto Luciano Pia

© Beppe Giardino

“The building has been thought as a living forest, a house on the trees like the houses children dream of and sometimes build, It is a special building because it is alive: it grows up, it breaths and it changes since 150 trees with tall trunks cover its terraces.”

“There are 50 additional trees in the court garden, and collectively, the trees produce oxygen, cut down air pollution, protect from noise and create a “perfect microclimate” inside the building.” – Luciano Pia

25-Green-25-verde-Urban-Treehouse-By-architetto-Luciano-Pia-17-Beppe-Giardino 25 Green (25 verde)-Urban Treehouse / architetto Luciano Pia

© Beppe Giardino

“One of the aims of the project is the increase of the energetic efficiency, adding that the building has heating and cooling systems that make use of geothermal energy through heat pumps and the recycling of rainwater.” – Pia says

  • For anyone who wants to fulfil their childhood dream of living in a treehouse, this playful, yet practical building is the answer.
25-Green-25-verde-Urban-Treehouse-By-architetto-Luciano-Pia-19-Beppe-Giardino 25 Green (25 verde)-Urban Treehouse / architetto Luciano Pia

© Beppe Giardino

architetto Luciano Pia:

“25 Green” : a house among trees

A new house has put down its roots in Turin. Its structure is in steel and it looks like a forest where trees are rooted in terraces with irregular shapes, ponds are crossed by footings and lush gardens cover the roofs. The building has been thought as a living forest, a house on the trees like the houses children dream of and sometimes build.

25-Green-25-verde-Urban-Treehouse-By-architetto-Luciano-Pia-22-Beppe-Giardino 25 Green (25 verde)-Urban Treehouse / architetto Luciano Pia

© Beppe Giardino

The project comes from the necessity of making a residential building to complement a block featured by lack of homogeneity and heterogeneous prospects. The aim of the project is both the construction of the block perimeter with a continuous façade and the making of a filter between the internal inhabited space and the streets. The project wants to create a flowing and smooth transition space to soften the passage from the inside to the outside where the space is always enjoyable. The smooth and changeable transition is emphasized by a targeted use of the green and the building materials as to create a structure which is compact and distinct but also transparent, mutable and enjoyable.

25-Green-25-verde-Urban-Treehouse-By-architetto-Luciano-Pia-27-Beppe-Giardino 25 Green (25 verde)-Urban Treehouse / architetto Luciano Pia

© Beppe Giardino

It is a special building because it is alive: it grows, it breaths and it changes since 150 trees with tall trunks cover its terraces. Together with 50 trees planted in the court garden they produce oxygen, absorb carbonic anhydride, cut down air pollution, protect from noise, follow the natural cycle of Seasons, grow day after day and create a perfect microclimate inside the building so diminuishing the fall and rise in temperature in summertime and wintertime.

25-Green-25-verde-Urban-Treehouse-By-architetto-Luciano-Pia-30-Beppe-Giardino-759x380 25 Green (25 verde)-Urban Treehouse / architetto Luciano Pia

© Beppe Giardino

The streeps in solid wood that floor the terraces filter the sunlight in summer, while in winter they let the light break into the house. The wainscot in larch shingles is a sort of soft and vibrant surface. The metal structures look like trees and they “grow” from the groundfloor to the roof while holding up the wooden planking of the terraces: they become entwined with the vegetation to form a unique façade.

25-Green-25-verde-Urban-Treehouse-By-architetto-Luciano-Pia-33-Beppe-Giardino 25 Green (25 verde)-Urban Treehouse / architetto Luciano Pia

© Beppe Giardino

One of the aims of the project is the increase of the energetic efficiency and for this reason several integrated solutions have been adopted: continuous insulation, sun protection, heating and cooling systems which make use of the geothermal energy with heat pumps and recycling of the falling rain to water the green.

25-Green-25-verde-Urban-Treehouse-By-architetto-Luciano-Pia-61-Beppe-Giardino 25 Green (25 verde)-Urban Treehouse / architetto Luciano Pia

© Beppe Giardino

In the vases there are trees or shrubs of different heights from 2.5 m. to 8 m. Deciduous species have been planted to have sun irradiation in wintertime too. The choice of the species , even if diversified according to the different needs, has been made to grant a variety of leaves, colours and flowering.

When all the green is fully blooming it gives the feeling of living in a tree house. You can dream of a house or live in a dream!

25-Green-25-verde-Urban-Treehouse-By-architetto-Luciano-Pia-73-Beppe-Giardino 25 Green (25 verde)-Urban Treehouse / architetto Luciano Pia

© Beppe Giardino

Project Data:

Project name: 25 Green (25 verde)
Location: Via Gabriele Chiabrera, 25, 10126 Turin, Italy
Coordinates: 45.045415, 7.680448
Type: Housing, Apartment
Project Area: 7,500 sqm
Project Year: 2007-2012
Status: Built
Completion Year: 2012

The people:

Client / Owner / Developer: Private
Architects: architetto Luciano Pia – Turin, Italy
Structural Engineer: Ing. Giovanni Vercelli
Energy Project: Ing. Andrea Cagni
Green Project: LINEEVERDI (Stefania Naretto & Chiara Otella)
Text Description: © Courtesy of architetto Luciano Pia, abcnews, worldarchitecturenews
Images: © architetto Luciano Pia, Beppe Giardino, flickr-Michelangelo Delu’, flickr-Lingotto Fiere – Torino

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25 Green (25 verde)-Urban Treehouse / architetto Luciano Pia
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