Spatial Characterization of Peri-Urban Neighborhoods Generated by Parcel-Based Planning and Development in Satellite Towns South of Nairobi Metropolitan, Kenya

Peri-urbanization in African countries is often characterized by fragmented and poorly coordinated land-use planning and development, raising concerns regarding the liveability and sustainability of emerging peri-urban neighbourhoods. This study examines spatial characteristics of neighbourhoods created through ad hoc sporadic parcel-based land use planning practices of preparing land subdivision layout plans without an existing comprehensive land use plan that guides the neighbourhood development. The study seeks to establish how ad hoc parcel-based land use planning, subdivision, and development influence liveability and sustainability spatial characteristics of peri-urban neighbourhoods. Three neighbourhood liveability and sustainability spatial parameters; land use mix, proximity and density of neighbourhoods are evaluated in three neighbourhoods in peri-urban areas South of Nairobi Metropolitan area—Kitengela, Athi River and Ongata Rongai using spatial data from Registry Index Maps (RIMs), cadastral survey plans, land use plans, Google Images and OpenStreetMaps. The results reveal contrasting aggregated land-use allocations, with Athi River locality predominantly allocated to industrial (65.86%), residential (17.41%), and transportation (13.60%) uses; Kitengela to residential (58.53%), commercial (14.88%), transportation (14.44%), public-purpose (5.95%), and industrial (4.70%) uses; and Ongata Rongai to residential (92.18%) and transportation (7.82%) uses, with other uses accounting for less than 1% or 0% of land allocation. These findings demonstrate that ad hoc sporadic piecemeal parcel-based land use planning, subdivision and development prioritize creation of living (residential land use) and working (industrial and commercial use) spaces with limited provision of social spaces which improve quality of life, human well-being, and social development such education, health and safety, recreation, and governance facilities. This results in very low land use mix, mixed-up residential densities and limited accessibility. Reactionary piecemeal parcel-based land use planning, subdivision and development triggered by immediate development needs creates peri-urban neighbourhoods with low spatial liveability and sustainability characteristics. These findings highlight the need to adopt a digital parcel-based land use planning and subdivision approval system that assesses and integrates spatial planning requirements to aid in subdivision plan approval decision making in order to enhance neighbourhood liveability and sustainability.