Renovations. Help!

Browstoner community:

We’re abut to undertake a renovation on our parlor floor and cellar. Dimensions: 20×45 but cellar has mechanicals, etc. so not a full 900 square feet of renovation there. We’re interviewing engineers/architects and could really use some input from you.

What should this type of renovations cost for each floor? I know all the rules regarding cost per square foot but I’d like some feedback on total cost per floor.

In the basement it’s just demo and framing a few rooms and dry walling. Some electric but nothing structural or crazy. Also a half bath renovation but very basic stuff.

On the parlor, it’s more extensive demolition, some structural (replacing load bearing wall with column supports to open up the space), nicer half bath renovation and a new kitchen (not super-high end but nice … no custom cabinets/subzero stuff but not 100% IKEA either).

What are ballpark total costs? Also, we’ve been told that an extension to the parlor would cost the same per square foot to build as the per square foot costs to renovate the existing parlor. True? I’ll answer any questions promptly.

Thank you!!