So much so that the U.S Green Building Council has implemented a new standard of green certified housing knows as LEED or Leadership in Energy and Environmental Design. 

Review and approval of the documentation concerning the property; Completion of satisfactory physical and environmental inspections of the Property; including suite inspections.

The risks of environmental alone are well worth the protection of personal assets and thats not including any of the other contingent liabilities that can crop up during ownership.If you're looking for an alternative to an LLC that would offer protection of assets then you might look at a Family Limited Partnership.

Usually you have an underwriting fee of around 3K, an initial environmental survey will cost at least 1500 (if it goes to a Phase 1 or Phase 2, just stop and find another property) to name a few.Best of luckStephanie

Would a more environmental approach to a new build/flip be more costly so developers and flippers sway away from this?

DWQ, Army Corp or any other environmental requirements or permits.

roof is over the attic which has the loose insulation, wind, environmental hazard) and also looking to put in can lights in the kitchen.  

Are there any environmental issues?

If I were to challenge it I would argue whether the unit was tested by a qualified environmental expert prior to renting and was it tested after the tenant left.  

T-12, T-3, rent rolls updated with current collections, leases, any surveys or environmental reports, repair and CapEx warranty info if any.