I have a listing in Lawrence square Lawrence and ravens crest in Plainsboro right now.

This single-family residence spans approximately 4,250 square feet and features 5 bedrooms and 5 bathrooms.

Constructed in 1910, this property features a total of 2,793 square feet of living space.

Built in 1961, this residence offers 4 bedrooms and 2 bathrooms within approximately 1,500 square feet of living space.

After some research online, I am reading that the cost per square foot on a gut renovation of this nature in Stamford CT is anywhere from $150-$350, which is ultimately not very helpful, because at $150 per sq ft, this is a very appealing project with a total profit of ~$175K (46% ROI) and at $350 per sq ft, it very much isn't, because it would be a net loss of 83K (haha).QUESTIONS:What can I do refine my estimate a bit given that I am not allowed to a formal inspection on the property? 

Figuring out the true cost will heavily depend on the type of dig down, depth, and total square footage. 

Built in 1905, this property features a total of 2,832 square feet of living space, divided into two units.

There's many other options in real estate such as syndication and note investing depending on your level of involvement. 

I do direct booking through the Houfy website, taking credit card payment by Square. 

I've seen estimates of $200 to $400 per square foot for SoCal with $700 sq ft for something higher end and building up a hill and but possibly higher for San Francisco Bay Area (lhigher labor costs, etc.).