Bonjour
La maisonnette = feminine noun
La maison = the house
La maisonn/ette = the little house
The suffix -et (masculine), -ette (feminine) are used to form a smaller form of sthg, of a name (smaller than)
examples =
- le garçon (the boy)= --> le garçonnet (the little boy : masculine = suffix -et)
- la fille (the girl) -> la fillette (the little girl : feminine /suffix -ette)
- le château (the castel) -> le châtelet (the little castle : masculine = suffix= -et
- la maison (the house) --> la maisonnette (the little house)
hope this helps ☺☺☺