Utilize your financial knowledge, give your answer or opinion to the input question or subject . Answer format is not limited.

Why do banks finance shared construction as mortgages instead of financing it directly and selling the apartments in a building?
Remember that risk should correlate with returns, in an investment. This means that the more risk you take on, the more return you should be receiving, in an efficient marketplace. That's why putting your money in a savings account might earn you <1% interest right now, but putting money in the stock market averages ~7% returns over time. You should be very careful not to use the word 'interest' when you mean 'returns'. In your post, you are calling capital gains (the increase in value of owned property) 'interest'. This may be understating in your head the level of risk associated with property ownership. In the case of the bank, they are not in the business of home construction. Rather than take that risk themselves, they would rather finance many projects being done by construction companies that know the business. The bank has a high degree of certainty of getting its money back, because its mortgages are protected by the value of the property.  Part of the benefit of an efficient marketplace is that risk gets 'bought' by individuals who want it. This means that people with a low-risk tolerance (such as banks, people on fixed incomes, seniors, etc.) can avoid risk, and people with a high risk tolerance (stock investors, young people with high income, etc.) can take on that risk for higher average returns. The bank's reasoning should remind you of the risk associated with property ownership: increases in value are not a sure thing. If you do not understand the risk of your investment, you cannot be certain that you are being well compensated for that risk. Note also that most countries place regulations on their banks that limit the amount of their funds that can be placed in 'higher risk' asset classes. Typically, this something along the lines of "If someone places a deposit with your bank, you can only invest that deposit in a low-risk debt-based asset [ie: you can take money deposited by customer A and use it to finance a mortgage for customer B]". This is done in an attempt to prevent collapse of the financial sector, if risky investments start failing.