Different methods to evaluate a multi-unit residential property
In general, NOI is calculated on a monthly basis using monthly income and expense data, and can then be converted to annual data simply by multiplying by 12.
As U.S. real estate sale prices have declined faster than rents due to the economic crisis, cap rates have returned to higher levels: as of December 2009, to 8.8% for office buildings in central business districts and 7.36% for apartment buildings – as per the Wall Street Journal