Regards

Generally it is recommended by the researchers to convert the landfill to a recreational area after it is closed

Due to several reasons building construction is not preferred but it is possible

Construction of a building first require that which type of building is going to be constructed and the current soil characteristics of the area like the bearing capacity and all that...

Iam attaching a paper too its old but sometimes old is gold

Thanks for your guidance

Welcome Basil

I suggest you to write an article on the role of green buildings for Environmental Sustainability or earthquake resistant structures

Best of luck

Intelligent Indians go ahead...

Based on the adverse effects of landfills even after closure, monitoring leachate level, underground water pollution level, level of methane extraction and settlements can last several years after landfills are capped entirely. Therefore, as far as I know, lighter land uses is assigned to landfill during the post-closure period, such as tennis court, gulf court, recreational parks, and .....

This is specifically important by considering the fact that nowadays, the depth of landfills can reach up to 10s of meters, and settlement can occur based on anaerobic and partially aerobic digestion (reduction of waste volume after digestion) that still can last throughout the landfill., heavy construction is not recommended.

Depending on the post-closure period, landfills can be used as gulf courts, as open sports ground (jogging, crossfit), region-dependent cross-country skiing or sledging. Depending on the hazardous nature of the stored waste, some capped landfills were used for animal grazing (sheeps, goats) or as biotope for specific and rare plants.

Once needs to do environmental impact assessment and see if there is less effect on human health.