Depending upon zoning, you can get away with less square footage per lot. I have a lot zoned RM-1-1, over 7500 sq ft., and I can split into 3 parcels because one side is an alley.
You really need to go to the City of SD Planning Dept. and verify for yourself. Actually, go three separate times, get names, and take the best two out of three answers. If you’re lucky, you might just get something in writing.
