Subdividing city lots

[Sam M.]

Currently own a residential property with 2 homes on 5 city lots. One of the homes was a mother in law apartment built on to the back of the detached garage. Current zoning is R1 

Was looking into dividing the property and selling the homes individually. City says lots need to be 75 X140 to be considered buildable lots but if I divide it into 2 I’d have a 65X125 and a 75X125. 
Any ideas on how I could go about dividing this? Rezoning? It’s a small town so I might be able to meet with the city but maybe I should talk to an attorney first. 
Was active on here years ago and my last post was 13 years ago. I’ve done  4 flips in the last 6 years and working on my 5th