Cost Basis after subdividing a property

[Michael Hellman]

Hello.  I purchased a home in late 2007.  I live in a small garage apartment for 4 years while renting out the main house.  The property had a large double lot in a nice neighborhood, so in 2014 I subdivided the lot and sold the empty portion of the lot to a builder, and kept the main house on the lot that remained.  During the time of the sale, the bank would not release me from the original mortgage, so most of the proceeds from the sale of the lot went towards paying off the mortgage.  At that time I did not have the cash to pay capital gains taxes on the sale of the newly subdivided lot so I reported it against the cost basis of the original purchase price.  In 2019 I sold the remaining house on the remaining lot.

My question is this.  I originally purchased the house for $214,000.  In 2014 I sold the subdivided lot for $173,00.  I sold the original house on the portion of the lot that was remaining in 2019 for $245,000.  Does this make my new cost basis $41,000 (214,000-173,000)?  I'm trying to figure this out in Turbotax which is anther challenge.