Buyer Paying Impact Fees and Development Review Fees?

[Weng L.]

I am looking to buy new construction of townhouse and surprised to see that seller passes following fees to buyer in closing costs:

Impact Fee - Water: $1129

Impact Fee - Waste Water: $2554

City Development Review: $8128

Environment Review: $275

Water Connection: $775

Electricity Connection: $1129

50% Credit for City Development Review: ($4064)

Total: $15,426 - $4,064 = $11,362

Plus they already want to charge buyer builder fee that is 1.75% of purchase price.

I know everything is negotiable but I have never seen that buyer paying any of these impact fees, review fees and utility connection fees (If so, why don't sellers charge buyers soil test, elevation survey, architectural drawing, pluming permit etc.? lol)  I am curious how common do you see this?