Question

The development plan included apartment buildings, single-family houses, creating a park, and two new schools.

Answer 1

Answer:

Explanation:

Remark

The error is more in agreement than being misplaced. The problem is in creating a park. All the other listings are plural. Creating a park is singular. The other examples don't contain a verb of any kind. Creating is a verb.

You might have to break this into 2 sentences again. There's no way to get around the singular plural problem or if there is, I don't see it.  Try this.

Answer: The development plan included apartment buildings, single-family houses, and two new schools. The plan also includes plans for a park.