Final answer:
The maximum riser height for stairways in one or two family dwellings is typically 7½ inches, as per the International Residential Code, but it's important to verify with local building codes.
Step-by-step explanation:
The maximum riser height for stairways in a one or two family dwelling is typically regulated by local building codes, which are often based on the International Residential Code (IRC). According to the IRC, the maximum riser height shall be 7½ inches. Riser height is the vertical distance from the top of one step to the top of the next step up. It's important to check with the local building department for the specific requirements for your area, as they can vary. Additionally, consistent riser heights contribute to the safety and comfort of using the stairs, as irregular heights can lead to trips and falls.