How do I calculate forded appreciation on a potential investment?
Asking price: 1.1M
Zoned: B1 
SF: 44,000
Lot Size: 5.78 Acres 

Current owner wants to release property from the next buyer for $1.50/sf

Per code the building is required to have no less than 250 parking spaces; but there is a single piece of asphalt or concrete no painted lines just gravel. 

If I remember correctly a build zoned as such needs to have minimum of 1 handicap acceptable parking space and this does not. 

On a side note this build has its own well and is on septic but is close enough to a water &amp; sewer main to be connected. 

To me it would make sense to hookup the building to the local sewer/water main and leave the well on the property &amp; remove the septic system. Then install a paved parking lot.

The only issue is that going to cost around 600k and I don’t know how to do the math to figure out of the property will be worth 1.7M after I do that or if it will be less or more.
[{"id": "hryx9q2", "text": "Will these proposed improvements increase rental income or decrease expenses?", "replies": [{"id": "hrz47mn", "text": "I believe they will decrease expenses along the lines of maintains the septic system. So I would have to get the tank pumped or worry about the leach field failing and it will increase the rent ability of the building making it a more viable solution for potential tenants. I would most likely be able to charge more per sf too", "replies": [{"id": "hrz5bc1", "text": "I'm not sure a tenant would care if it's septic versus sewer, the parking probably  helps. But if you can quantify you increased income from lessening your maintenance expense then you can cap that income and estimate a future increase in value.", "replies": [], "depth": 3}], "depth": 2}], "depth": 1}]