A listed villa of the 1850ties was converted into two family apartments. The large garden is used collectively. The 1st and 2nd floors were redesigned in relation to the needs of a couple with five children. Spaces „suitable for everyday use" are created and at the same time, the special character of the historic building with its ornamental elements and valuable wooden floors is strengthened.

To reestablish the former spaciousness a multitude of fixtures and walls were demolished. The roof was reconstructed according to current energetic standards. The first floor serves as an entrance area with a large hall leading to the kitchen and the balcony. The master bedroom and one kid's room are orientated to the garden. The former ballroom as the heart of the building is used as a dining and living room. The space has an impressive size (55m2, 6m high) and is decorated with an ornamental ceiling that was preserved and - where necessary - restored. A gallery is installed into the ballroom as a slender glass-steel-structure: The stairs are suspended from the gallery to keep the parquetry untouched. The second floor is reserved „for kids only" and features four rooms, a play hall, and a bathroom. The staircase between the two floors is enhanced in its spaciousness by opening up a part of the ceiling. All design and constructive measurements were undertaken in detailed consultation with the institution for historic preservation.

The Rubber House as a price winning project in the Eenvoud/ Simplicity competition was selected to be built in Almere, Netherlands, as one of 12 experimental housing projects. In volume and style inspired by the simple and archetypal Dutch barn architecture the Rubberhouse forms a simple asymmetric double pitched roof inhabiting 2 storeys, in combination with a single pitch roof with one storey. The resource saving construction consists of massive wood panels from cross-laminated timber. The outer walls and the roof surface are clad with black EPDM foil. In contrast to that the atmosphere of the inside is characterized by the natural warm surface of the massive wooden walls. The utilization concept proposes small private rooms in favour of a generous open plan living area. Clear lines of sight through the entire building support the robust, open space sequence and allow visual connections into the adjacent forest. The living room can be expanded via the large sliding glass doors onto the terrace. The high degree of prefabrication allowed for a building period of only three months.

The project PELIKAN MIX4 is characterized by a variety of dwelling types according to urban lifestyles. Within an urban master plan four distinctive characteristics are developed:
A landscape tableau is the connecting element, forming an entrée for the private, semi-public and public spaces. Generous lobbies in each house compose a discrete identity and a space of encounters. A great flexibility in the floor plans allows a variety of different apartments in size and type. According to society demands, the types "wellness", "sustainable", "extravagant" and "comfortable" are developed. They differ in constellation of rooms, material, building equipment and the offer of outdoor spaces. So called "Glorietten" crown the buildings and optimize light, spatial peculiarity and views.

House 1 is the first built project of the masterplan 'mirror twins'. On top of a shared commercial ground floor a green link connects the site with the close-by park. The two seperate buildings connected by the common plinth are generating an enormous amount of requested square meters. Rather massive volumes are perforated by a series of programmatic voids that connect to a common circulation space, an inner void. The much needed public space is integrated into the building by creating a second entry level and reinterpreting the circulation space. The engraving appearance
of House 1 refers to the typical salient facades of Tirana. Multiple tilted strips create a rich play of light and shadow.

In the 14-month planning and realisation stage, a baroque hunting castle in Seesen was redeveloped with a focus on simplicity and clarity at a reasonable price. Also, the permanent exhibition of the museum was conceived and moved.

Central attention at the rebuilding work was the restoration of spatial relations and structures, as well as the creation of a high-quality, modern but timeless showroom, which is able to take on the various exhibits, including specialities such as 'The world's longest piano string. The exhibition has a modern pedagogical approach and offers attractions and information for all age groups. Additionally, the value was placed to increase children's participation through experimental- and multimedia stations. In this way the museum can be accessed by a variety of senses, understanding through seeing, hearing and touching.

The former area of the World Exposition 2000 is being transformed into the EXPO PARK HANNOVER: a high-class business and technology park with excellent infrastructure within walking distance to the world's biggest fairground. About 85% of the area is already being used by businesses, service providers, institutions for higher education and event locations. For the remaining plots, a development study was commissioned in order to visualize possible designs and volumetric developments.

Special attention was paid to a wide range of programmatic options. The allotment provides plots between 2.000m2 and 20.000m2 and floor areas between 4.000m2 and up to 30.000m2. Different building types were developed and visualized in order to serve different needs concerning address-making, accessibility or internal organization. Exemplary designs are the OfficeTower, the ShowSPACE, the OfficeCUBES and the Start-upLAB.

This urban design aims to create an attractive living environment for young families and couples and to give a new impulse to a large social housing estate from the 1960s. The existing open block structure will be maintained but is transformed into a structure with semi-private courtyards.

Different typologies - i.e. houses with ground-level access, apartments with open floor plans - add variation to the housing supply. Within the building blocks, elevated courtyards create a safe environment for social interaction between inhabitants, especially young families. Notwithstanding their open character, these courtyards offer a clear visual and functional border between public and private spaces.

Between the blocks, a sequence of car-free squares that draw on the surrounding structure contributes to a lively public space. To keep spaces as car-free as possible, most of the parking is organized in underground garages which are accessible from the edges of the block. By drawing on the existing structure, and by continuing the green belts and the existing rows of trees, the design creates a strong link with its surroundings.

The new residential neighbourhood Hilligenwöhren is located on the threshold of a compact city to open landscape in Bothfeld. A composition of three- to four-storey buildings generates two courtyards with different spatial qualities. The norther green courtyards are the new neighbourhood's intimate centre, whereas the southern courtyard opens up to the street and hence to the neighbourhood.

The buildings are connected via access balconies which activate the courtyards and are the basis for a vivid community. The central community room for all residents connects the two green spaces. It is the neighbourhood's living room. By opening and widening spaces, informal meeting points and social contact surfaces are offered. The building structure enables a flexible arrangement of various residential typologies und therefore a social mixture.

A solid structure for the development of a long-lasting neighbourhood is offered. Furthermore, natural building materials ensure comfortable and healthy living environments.

The recyclinghouse is an experimental residential building in the Hanover district of Kronsberg. It is a prototype that tests the possibilities and potentials of various types of recycling in the real laboratory and shows a cycle-oriented and resource-saving planning approach.

On the one hand, the recycling center relies on recyclable building products, such as the raw construction made of glue-free solid wood elements. On the other hand, recycled materials such as the foundation made of recycled concrete or wall insulations made from old jute bags are used. There are also large quantities of used components being used which, if possible, originate from the building stock of the client GUNDLACH or have been obtained locally. Particularly important is a recycling-fair design that allows the use and disassembly of the components without loss of quality or a sorted separation of the materials after the end of life.

The construction industry is one of the largest waste producers and consumers of resources and a significant contributor to global CO2 emissions. When planning buildings, today it is mainly the energy consumption in the operation of a building that is considered. The considerable amounts of "gray energy" involved in the production of buildings remain largely unconsidered. Here, the existing building stock can also be understood as huge raw material storage. The recycling of building materials and materials as well as recycling-friendly construction methods will play an increasingly important role in the future.