Neither: it is Mr Roberts' house or Mr Roberts's house .
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
01cite10Anonymous12cite11b10Mr. Robert11font10s'12font10 house is plural possessive (ie. the house is owned by more than one Mr. Roberts.)12br
12b12br
10Dropping the s in singular possessive is very common, and poor resources say this can be done, though stri