3.10.3 INCREMENTALITY : As a concept

The idea of incremental housing is hardly new; it has been extensively used for ages in numerous cultures all over the world. It has made it possible for economically weaker households to construct their own house in many situations in an affordable and sustainable manner as an alternative to the shortage of accessible and cheap housing options.

The global and local references, to understand the importance of incrementality:

The urban sector in India is expanding quickly, and there are an increasing number of housing developments. Despite the dramatic increase, the nation's residents do not have enough homes to meet their needs. A somewhat unexplored idea in the nation is incremental housing, which views a home as a process in which residents can take part in building their own place of residence based on their preferences and financial limitations. Incrementality is not yet a notion in India's housing policy. Using case studies of ongoing projects Globally and in India, the study intends to highlight the challenges encountered during the execution of incremental housing.

3.10.4 Global and Local Case Studies :

Table 1.1 Comparative Analysis for Global and Local Case Studies

Row 1- 3 : Glocal Case Studies

Row 4,5 : Local Case Studies

4.1 REFERENCES : GLOBAL

4.1.1 Villa Verde Housing

A home development called Villa Verde is owned by Elemental and managed by the forestry company Arauco. This project was created by the corporation as a place for its workers to call home. The job is not located in the city's center. They selected a place close to the task because they would like the employees to be around them.

Landed housing has a larger developed area and seems to be more transparent about who owns the land in each unit. Here, the architect adheres to the half-house principle, in which only one-half of the house is built and the other half is left up to the owners to finish as they see fit. The area that can be expanded can include a family room, up to two bedrooms, and other spaces. Four bedrooms in total, a dining area, a living room, and a terrace are all included in Villa Verde.

One staircase is available for vertical accessibility, and the conduit area has been provided on the opposite end to facilitate pipe operations. As a result, the residents will not be concerned about staircase circulation when it's time to upgrade their current residence.

4.1.2 Tila Housing

39 flats make up the Tila housing building, and each one is built so that it faces south. There is a separately loaded passage on the opposite side of the building that is used for movement. With beams serving as the prior support system and a 5-meter height for each floor, the inhabitants may construct another mezzanine level. The infill process is aided by partition walls; residents are allowed to customize the interiors with whichever material they choose.

This kind of design creates a limit that encourages expansion inside rather than outward. Apart from the underlying structure, the architect built two bedrooms for the 102 sq. ft. unit type and one toilet for the 50 sq. ft. unit. The underlying framework has allowed the inhabitants to maintain the apartment's exterior while making inside upgrades. The complete façade is pre-designed, as opposed to the extension design, which enables anyone to construct their own façade.

This design, therefore targets the higher middle class segment of society. As support system suppliers, architects only provide a blank space that locals can fill in. Inhabitants will be happy with their homes since they have the freedom to create customized interiors, and this concept is economical to build. The user can use infill systems to position furniture and assess how much space can be obtained in the unit and for what purpose.

4.1.3 Quinta Monroy Housing

These housing units will be offered in two layouts and can house up to five households. A description of both units is provided below: In the image above, the house type shown in blue offers immediate access from the entrance door. Space only expands in the sideways and reverse directions. This kind of building enables locals to launch a business to strengthen their community's economy. One planned module is followed by two distinct housing kinds. The Duplex kinds are highlighted in orange, blue, and red as seen in the aforementioned photographs. As well as forward and backward, space also enlarges in the upward direction. As a result, there are stairs in each unit separately.

Unit Functions and Expansion through Balconly

4.1.4 Weston Williamson Concept

To alleviate Palestine's housing shortage, the British Weston Williamson Studio created vertical dwellings with the idea of incremental housing. The progressive house idea was developed by Chilean architect Alejandro Aravena. In this type of home, people can add on a room dependent on their financial capabilities. Each flat will be constructed with pillars in the center and a large balcony. The houses are meant to be permanent residences that "mature along with their inhabitants." Prefabricated panels can be used by residents to extend onto balconies. The placement of modular components can be varied to create fascinating shapes. This flat comes in a variety of shapes and sizes, with options for up to three bedrooms. Contrarily, the communal room is arranged on the ground floor. The balcony, which was intended to be spacious enough, can accommodate the expansion, which is only limited to three additional rooms.

4.2 REFERENCES : LOCAL

4.2.1 Incremental housing in India: Yerwada Pune

This is not a novel idea in India, where numerous attempts have already been made to incorporate progressive housing into everyday life. The project started by Filipe Balestra and Sara Göransson in Mumbai, in partnership with SPARC and Mahila Milan, is one such instance of progressive housing in India. Three different sample designs have been employed in the project: With the initial Prototype, the user can expand and lengthen the house vertically by building an additional storey on top of the given skeletal frame. Consequently, it is possible to convert a two-story home to a three-story home. The second prototype is creating a framework with an additional storey on the ground level that may be used for parking or expanded to create a business or residence. The third prototype was created with the daily routines of the people who will live in these homes in mind, and the middle space in the three-story building was left open for growth.