In my area (Baltimore City) it's either a code requirement or something inspectors will flag.  Unless the builder's cost is outrageous pretreatment with the warranty associated is something I would do, and of course you can negotiate the item when going to contract.

BK7 Filed 8/11/2009 Discharged 11/23/2009. Purchased new home 4/11/2012 Gardening since 10/6/2012

Starting Score:11/16/2009 EQ 566 11/16/2009 TU 538
Interim Score: 4/2/2011 EQ 682 1/14/2011 TU 665
Current Score: 12/27/2012 EQ 683 09/17/2012 EX (lender) 670 1/01/2013 TU 701
Goal Score: EQ 700 TU 700
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