ALTO FAMILY: Consists of the couple Nick and Vita Alto, and their daughter Holly Alto. They are evil and are rivals with the Landgraabs.
BACHELOR FAMILY: Consists of Simis and Jocasta, and their kids, the infamous Michael and Bella Bachelor. They are a normal family raising their children.
BAKER: Consists of the couple Svetlana and Heathcliff Baker, their daughter Becky Baker, and her son Topher Baker. Will Svetlana and Heathcliff's grandson disrupt things?
BUNCH: A family that has 2 parents trying to juggle their 4 crazy children.
CLAVELL: Little is known about this family.
CRUMPLEBOTTOM: Agnes Crumplebottom is a cranky young adult who is haunted by her dead husband.
FRIO: 2 bothers Jared and Connor live seemingly normal life, but their personality may make woman dislike them. Also Jared is the father of Clair Ursine's child.
FUNKE: Sabrina and Rhett Funke are very young and people don't think that they can take care of their 3 kids. But will their talented children make parenting easier?
GLOVER: Gwen is an artistic girl and her rommie Holden is spacy and bookish, but their differences may make something other than friends.
GOTH: Are the founders of Sunset Valley. Gunther Goth and his wife Cornelia Goth are raising their child Mortimer Goth. They seem a little weary to some people.
HART: Gus and Dorie Hart seem normal, but they're not, both of them
have the insane trait. They're daughter Bebe is trying to be a normal teenager in this insane house.
KEATON: Justine and Marty Keaton are very sporty, will Justine's child follow in their footsteps?
LANDGRAAB: Geoffrey and Nora Landgraab and their son Malcom Landgraab live in an expensive house. They are regularly nice people but they have a rivalry with the Alto family.
LANGERAK: Dustin and Iliana Langerak are a young happy couple. Iliana sister Zelda-Mae helps them take care of their two children Parker and Kaylynn Langerak (from The Sims 2)
LUM: The couple Theodore and Lily are a weird pair. Will their son Lawrence follow in Theodore or Lily's footsteps.
MARTINEZ: The couple Pablo and Jennifer are outdoor people and love to see nature. How will they thrive in the suburban town of Sunset Valley.
ROOMIES: Stiles McGray, Tamara Donner, Cycl0n3 Sw0rd, Emma Hatch, and Blair Wainwright are all friends from different backgrounds living in the same home.
SINGLE MOM'S: Fiona McIrish and her daughter River lived alone until Fiona's friend Molly and her daughter Fiona needed a place to stay. How will that effect Fiona's (the mom)'s life.
URSINE: Claire Ursine is a criminal in Sunset Valley. She is pregnant at the start of The Sims 3 with Jared Frio's child.
WILLIAMS: Aimee is a great cook, but her husband Marly wants to be the provider. Will he be able to support his wife and daughter.
WOLFF: Thornton and Margana Wolff are newlyweds, but it seems they rushed their marriage because Thornton is against children and Morgana wants a big family. What'll they do to fulfill both of their wants?