The exact percentage can vary depending on the complexity of the project.

Start by calculating the percentage of your rented home, typically based on square footage.

When sold the percentage of profit allocated to the primary residence should be able to come to him tax free (the first $250K of profit if single or $500K if married. 

In a similar fashion, if you can imagine how much landscaping and underground infrastructure is in a golf course as compared to the clubhouse, that will give an indication of why an extremely high percentage of the property's value is allocated to the land improvements. 

Leaving aside if the JV is the best way to fund and assuming its not a scam than the fee is probably a very wise business move because a large percentage of the deals you see are from people who are delusional or are not taking numerous things into account (delays, closing cost, wrong comps, time, etc.).

I am not beeping harsh as she requested additional eyes which was good and she was receptive to inputs… I consulted on one today that had 95% LTV OO but no PMI, 2% vacancy as self managed including delinquent rent and tenant turnover, a maintenance/cap ex that was based on percentage but was a quad and her allocation was ~50% of my estimate, and no PM even though she intends to move away in a year or so. 

Such service would on your behalf appeal the property tax assessment (each year, if you wish), and if a reduction occurs, they take a percentage fee from the appeal to bill you.

However, it’s important to note that the percentage of the original list price received has dipped to 94%, a slight 2% drop from last year.

We operate on fairness, and we feel that it is fair to retain the commission percentage of the late fee.

The List to Sold Price percentage.