Question

If I was writing "houses costs" as in the costs of more than one house, how would I write that? And also, would "costs" be singular because each house only has one price? Also, what is the correct singular and plural of cost?

Answer 1

The costs of houses - no, it would be plural - singular: costs / plural: cost

Explanation:

"Houses costs" seems like a noun and a verb.
If you would say "each house costs," then yes
And yes, if it's singular, then it is "costs." If it is plural, then it is "cost."