Apartments can serve both residential and investment purposes, but returns depend on several factors. Investors considering Flats for sale in Islamabad should research rental demand, occupancy levels, service charges, resale activity, and the reputation of the building or development. Smaller apartments in well-connected locations may appeal to tenants seeking convenient accommodation, while larger family units may attract a different rental audience. Investors should calculate expected rental income against purchase costs and recurring expenses rather than assuming that every apartment will generate the same return.