How many years must you attend college to get a master's in architectural engineering?
Penn State offers an integrated bachelor's / master's program that can be completed in 5 and a half years. Just a bachelor's degree requires 5 years, so it's really only an extra semester.
It depends on the type on engineering you're going for. A friend of mine got her Bachelors in 5 years for Civil Engineering. Another friend went for 8 years to get his masters in Electrical Engineering. It depends on the discipline (engineering field) and the amount of time you have to attend college.