you will perhaps reline the chimney to the roof.
you may be resizing or replacing the wall pipes.

ventilation. gas dryers versus electric clothes dryers.
bring electrical connections to the basement ceiling surface. don't
bury any pipe connection shutoffs.
finishing a basement is a great big project best discussed with a
building inspector. a friend of mine added a beautiful and convenient
basement bathroom only to face a toxic mold cleanup just a couple of
years later related to drips and condensation on a water line.
sewage. drainage. radon. legal windows and egress. alarm systems for CO
and smoke. moisture arguments of seepage vs condensation. discovering
that a dehumidifier is just an air conditioner with a drain hose.