Old home in Denver - cost to renovate

[Sunitha Alli]

We are making an offer on an 1940 built home in down town Denver.  This is an old home surrounded by all newly built condos with roof top decks etc. These condos are selling for 500k for a 1500 sqft. multi level units.

This home is 750 sqft with 750 sqft in basement.  Lot size 4500 sqft.  What would be the cost in Denver to completely renovate the home including electrical, plubling, hvac and roof.  

I need to budget the fixing cost before making an offer.  Kindly help.

Thank you

Sunitha