Barcelona attracts tech and biotech pros with its fast internet and vibrant expat community. Central flats average €1,400 to €2,100 monthly. Valencia’s costs are lower, making it ideal for younger workers. Spanish landlords love paperwork, so you’ll need proof of income, ID, and, for international hires, work contracts. Many agencies offer virtual tours and English-language support. Standard leases run for one year but can be longer, with strict rules on renewal and eviction in most cities.