Multifamily environmental due diligence: what to check on an apartment deal
Apartments are a low-risk use, but people sleep there, so any vapor or flood problem matters more.
Why apartment buildings and multifamily carry this risk
Residential use raises the stakes: regulators and lenders apply stricter limits for homes than for warehouses. A neighboring solvent or fuel case can matter here when it would not for industrial use.
Older buildings in the Northeast and Midwest often had heating oil tanks, sometimes still buried in the yard.
What usually turns up
Vapor from nearby cleanup sites
Worth checkingResidential use has the strictest vapor limits. Check for dry cleaners, stations and plants within a few hundred feet.
Old heating oil tanks
Worth checkingBuried tanks from oil heat are often unregistered and leak quietly.
Infill on former industrial land
Worth checkingNew projects on old rail, plant or shop land may carry controls that limit use or require a vapor barrier.
Flood zone and ground floor units
Worth checkingRequired flood insurance across a large building is a real line item, and ground floor units take the damage.
What the pre-screen checks for a apartment building
- Historical aerials and maps for past industrial use of the parcel.
- Cleanup and tank sites within a quarter mile, ranked by distance and status.
- Recorded use limits or engineering controls from a past cleanup.
- FEMA flood zone for each building and parking area.
Pre-screen a property before you spend on a Phase I
A desk review of one address: past uses from historical photos and maps, federal and state environmental records, and flood risk, ready usually within the hour. $100 for one report, or $100/month for 3.
Questions to ask the seller
- Was the building ever heated with oil, and where was the tank?
- Is there a vapor barrier or mitigation system, and who maintains it?
- Any recorded environmental covenants on the title?
- Which buildings have flooded, and what claims were paid?
When to order a full Phase I
Agency lenders (Fannie Mae, Freddie Mac, HUD) require a Phase I on multifamily loans. Use the pre-screen before you make an offer, then order the Phase I your lender specifies.