The area was originally designed to house workers for nearby industrial zones and included key social infrastructure—schools, kindergartens, healthcare facilities, and green public spaces—integrated into the neighborhood clusters. In recent decades, Mladost 4 has transformed rapidly due to Sofia’s urban expansion and the influx of new residents, businesses, and real estate developments.

One of the district’s defining features is the Business Park Sofia, Bulgaria’s largest office park, which significantly impacts mobility patterns and land use in the area. This juxtaposition of residential and commercial intensification has led to increased congestion and put pressure on existing infrastructure and services.

Mobility in Mladost 4 is supported by several public transport lines, including a metro station that connects the area to central Sofia. However, the area faces a stark contrast between walkable internal zones and busy arterial roads that limit pedestrian comfort and safety. Car use remains dominant, and public space quality varies widely across the district.

Urban planning efforts in recent years have included improvements to transport connectivity and the creation of green corridors, but challenges persist in aligning development with sustainable and inclusive principles. There is a growing need to re-integrate community-oriented spaces and better balance the residential, commercial, and mobility functions of the district.

Challenges for Urban Planning:

• Rapid and uneven urban development driven by real estate pressures.
• Traffic congestion and lack of safe, attractive public space.
• Declining accessibility of basic services for long-term residents.
• Limited community participation in planning processes.
• Tension between private investment and public interest in land use.

As part of the 15minESTATES project, Mladost 4 provides a crucial example of how proximity-based planning and co-creation processes can support more equitable and sustainable development in high-pressure urban growth areas.

The district includes several large housing estates built during the socialist era, primarily from the 1960s to 1980s. These estates consist of prefabricated apartment blocks designed to meet the growing housing needs of urban workers. They were initially equipped with basic public services, including schools, health centers, shops, and green spaces—but many of these amenities have become outdated or underused over time.

Mobility in Pesterzsébet reflects the broader trends of Budapest’s urban development. The district is well-connected to the city center by tram, suburban rail (HÉV), and bus lines. However, car dependency has grown in recent decades, resulting in traffic congestion and competition for public space. Despite this, many areas within the housing estates are walkable, and a network of sidewalks and green spaces supports local mobility.

Urban planning in Pesterzsébet faces the complex task of balancing heritage preservation, community needs, and urban regeneration. Some neighborhoods struggle with aging infrastructure and social disparities, while others are experiencing new investment and demographic change. Co-creative planning processes are increasingly important for addressing the fragmented landscape and ensuring that new interventions reflect the voices of local residents.

Recent efforts have focused on improving the quality of public space, revitalizing schools and community services, and expanding cycling and pedestrian infrastructure. These initiatives are part of a broader ambition to create 15-minute neighborhoods, where basic needs and amenities are accessible within walking or cycling distance.

Challenges for Urban Planning:

• Aging housing stock and infrastructure in socialist-era estates.
• Unequal access to social services and quality public spaces.
• Rising car use and lack of active mobility alternatives in some zones.
• Limited community engagement in past planning processes.
• Need for integrated approaches to regeneration and social inclusion.

Pesterzsébet plays a key role in the 15minESTATES project as a representative of large, peripheral housing estates in a transitioning post-socialist urban context. It offers valuable insights into how participatory, proximity-based planning can help reconnect neighborhoods, improve mobility, and enhance quality of life for diverse urban populations.

Aerial photo of Halle-Neustadt. Image credit – Stadt Halle

In Halle-Neustadt, classic modernism meets the idea of the ‘socialist city’, mainly planned by the Bauhaus architect Richard Paulick. In the 1960s, the initial four residential complexes and the main parts of the centre were built, which today are considered particularly valuable in terms of urban development. The five 18-storey high-rise blocks in the centre of the estate, which are connected to each other via a pedestrian zone (Neustädter Passage), serve as a landmark of Halle-Neustadt and were intended as a counterpart to the five historical towers of the old town of Halle on the other side of the river. Today they, and some other typical buildings, are listed as building heritage.

As Neustadt has been a formerly independent city, the estate has an own city centre, which is providing a high quantity and diversity of urban amenities and infrastructure facilities (retail, entertainment, authorities, etc.). Additionally, there are also smaller neighbourhood centres in the residential complexes. Despite the aspiration to create a multifunctional district, many important infrastructures were not realised at all or only at a very late stage of development. The estate is connected to the city centre via a main road (‘Magistrale’), two tram lines and a suburban train.

Caused by economically led out-migration and decreasing birth rates, both resulting from the fall of the iron wall and the German reunification, affecting whole East Germany, Halle-Neustadt has lost around half of its population since 1989. Additionally, the image of the large housing estates was getting worse, and people who could effort, moved to refurbished houses in the inner city or newly built suburban areas.

The massive population decline in the 1990s was addressed by a national and federal state funding programme, aiming at demolishing vacant housing to stabilize the market and to avoid deprived areas (‘Stadtumbau Ost’ – national urban redevelopment programme).

The original idea, to focus on the deconstruction at the fringe and to stabilize the inner areas, could only be implemented to a limited extent. In the 1990s a larger amount of the formerly municipal owned housing stock was sold to large private enterprises. The diverse ownership structures (municipal housing association, municipal housing associations, real estate companies) limit the opportunities to guide and manage the overall development of the estate. So, perforation of the building structure took place by selective demolition, infrastructure facilities were demolished and selective refurbishment led to a very heterogeneous situation of the building stock. In some parts, the municipality lost its power to guide urban development. Nevertheless, the efforts helped to continuously reduce the number of vacant flats. Parallel, funding was spent to improve the public space, green spaces and the infrastructure provision.

Parallel to shrinkage and ageing, segregation took and takes place. Due to affordable rents, low-income households and people being dependent on state subsidies move to the estate. The estate is characterized by the highest unemployment rate, childhood poverty rate and lowest income compared to the whole city.  Due to international migration, a growing number of refugees settled there, since vacant and affordable flats are available. Following population numbers are growing again, while in particular social and educational infrastructure is insufficient. These recent dynamics mean also new requirements for housing, public spaces, and infrastructure. The diversification, marginalization, disparities and also growth mean fundamental challenges for urban authorities to develop Halle-Neustadt as an attractive and valuable part of the city.

The strategic aim for Halle-Neustadt is to prioritise the core areas as high-quality and attractive neighbourhoods. Furthermore, the city is continuously developing and shaping sustainable transport systems, in particular by promoting an environmentally friendly transport by increasing the share of public transport, cycling and walking. The aim is to ensure just mobility options for all population groups.

Sources:

Integriertes Stadtentwicklungskonzept Halle 2025; Strukturkonzept Statteilzentrum Neustadt [https://halle.de/leben-in-halle/stadtentwicklung/raeumliche-konzepte]

StadtumMig-Projektteam (Hrsg.) (2023): Vom Stadtumbauschwerpunkt zum Einwanderungsquartier. Herausforderungen und Perspektiven für ostdeutsche Großwohnsiedlungen. DOI: 10.18452/25294

.

The urban fabric of Delft West is characterized by large housing blocks, open green spaces, and infrastructure built for high vehicular mobility. The district was planned with wide roads and clear zoning divisions, which resulted in the isolation of housing from commercial and social services. This has led to functional fragmentation and a lack of vibrant public spaces.

Mobility infrastructure in Delft West includes well-established cycling paths and connections to the city’s tram and bus networks, making the area accessible to the inner city and regional destinations. However, despite the good physical connectivity, there are issues of social disconnection and declining use of local amenities.

In recent years, urban redevelopment efforts have aimed to shift from a car-dominated structure to a people-first mobility model. Strategic plans focus on improving walkability, expanding the cycling network, and enhancing pedestrian safety, while also repurposing public spaces and underused infrastructure to support more inclusive and sustainable forms of mobility.

Key initiatives include the Kop van de Buitenhof project—a long-term transformation plan to integrate social, economic, and environmental upgrades. The area is undergoing spatial and functional renewal through participatory masterplanning, which emphasizes healthy living environments, functional mixing (housing, education, healthcare), and improved public spaces.

Challenges for Urban Planning:

• Adapting car-oriented layouts to support active and sustainable mobility.
• Revitalizing social and commercial amenities to meet changing demographics.
• Enhancing public space usability and liveliness.
• Managing social diversity and inclusion in planning processes.
• Ensuring efficient maintenance and long-term spatial quality.

Delft West serves as a critical testbed within the 15minESTATES project for exploring how proximity-based planning and co-creative processes can support just and sustainable mobility in large-scale residential districts.

The district is composed mainly of large panel buildings and is home to a diverse population, including a growing number of younger families and elderly residents. Originally equipped with schools, kindergartens, polyclinics, and shops integrated into the housing clusters, Ziepniekkalns was intended to provide all daily needs within walking distance. Over time, however, some of these functions have deteriorated or become obsolete, leading to underused spaces and uneven service provision.

Mobility in Ziepniekkalns is shaped by a wide boulevard and a network of feeder streets that provide access to residential complexes. The area is well-served by Riga’s public transport system—trolleybuses, buses, and minibuses connect the district to the city center and other parts of Riga. Despite this, the built environment still prioritizes cars, with expansive parking zones and long distances between buildings contributing to a fragmented pedestrian experience.

In recent years, attention has turned toward improving the quality of public space and enhancing connectivity for pedestrians and cyclists. Planning strategies increasingly aim to balance the existing car-oriented infrastructure with softer modes of mobility, while integrating green space, public services, and housing renewal.

Ziepniekkalns represents a valuable case for understanding how socialist-era urban districts can transition toward more inclusive and proximity-based models of living and moving. Local stakeholders and residents are gradually becoming more engaged in shaping their environment, laying the groundwork for co-creation processes central to the 15minESTATES approach.

Challenges for Urban Planning:

• Aging housing stock and underutilized infrastructure.
• Diminished access to social and educational amenities in parts of the district.
• Low-quality or disconnected public spaces.
• Mobility patterns still dominated by car use.
• Limited opportunities for active citizen participation in planning.

Within the 15minESTATES project, Ziepniekkalns offers critical insight into the challenges and possibilities of regenerating large housing estates in post-socialist cities through participatory, sustainable mobility and spatial strategies.