Copyright of our CG work using the models uploaded on 3D Warehouse

We downloaded building models from 3D Warehouse and placed them around our building model we designed.
Then we made a 2D CG image by rendering of the model in 3DCAD.
We have the copyright and intellectual property rights of this CG image, don’t we?
even if the image of the models from 3D Warehouse was included in this CG image.

You should take your concerns to a lawyer, not to a discussion group. Any advice you get here will be worth exactly what you paid for it!