Apartment Conversion Costs & Recommendations

[Michael J Murphy Jr]

Looking for cost or contractor recommendations. I am looking at doing a conversion of an existing 6,000+ SF residential property (currently used as offices) and converting it to multi family (6-8 apartment). Current condition is pretty good. From a space planning side it works. I am trying to ballpark costs and what might be involved. Before getting into full design and costing, does anyone have any rule of thumb cost guidance to apply? I assume all new electric, plumbing, hvac. I assume I’ll need to add fire suppression. Not sure what will be required on fire separation. It’s in Lancaster County, PA.