Make your own buy vs. rent decision for a house you are interested in buying. Please use a real estate website (e.g., apartments.com) and share two links for similar housing, one for rent and one for sale. Use these prices for your calculation. Do not forget to consider any additional costs associated with your prospective purchase. Regarding the mortgage, you can get the mortgage rates from any German bank. You will need to stick to 10-year mortgages. Discuss whether buying the apartment you are interested in makes financial sense.