The average rental price for apartments in Castelldefels varies based on several factors, including location, size, and amenities. Typically, you can expect to pay around €1,200 to €1,500 per month for a two-bedroom apartment near the beachfront. In more residential areas further from the sea, prices can dip to between €900 and €1,200 for similar accommodations. For smaller, one-bedroom apartments, rentals range from €800 to €1,200, depending on the proximity to the town center and local services. Luxury apartments or those with sea views often command prices upwards of €2,000, reflecting their premium location and features. Additionally, factors like seasonal demand can also influence rental costs, especially during the peak summer months when the town attracts tourists.