Energy security constitutes a major challenge for Jordan’s sustainable development. Space heating in Jordan represents ~61% of total residential energy consumption and dominantly involves portable un-flued kerosene and LPG stoves. Fuel combustion of such heaters generates poor indoor air quality and emits GHGs. Moreover, recent housing condition surveys show that the majority of dwellings in Jordan are very energy inefficient. This paper assesses the thermal performance of existing urban low-middle income apartments in Amman. This aim was approached through surveying 106 sample units and using EnergyPlus engine to calculate thermal performance of two representative apartments. Findings showed that ~75% of the apartments had thermally poor external envelopes. Analysis revealed that ~64% of heat loss can be attributed to exposed walls and roofs. The present research found that ‘thrift retrofitting’ will be inevitable in any effort in Jordan to deliver resilient low-middle income apartments
