Ann Arbor Local Research

Little regulatory reach, deep winter physics

Window replacement sits largely outside floodplain and stormwater administration, with the usual exception for work extensive enough to engage improvement thresholds inside a mapped zone. What genuinely governs the result here is climate — deep winter temperatures make the frame material and thermal break more consequential than the glass coating, and installation air sealing matters more than either.

Official sources

• Ann Arbor floodplain management
• Ann Arbor stormwater management

Confirm the parcel, then confirm the openings

Citywide records cannot tell you your parcel's flood status, whether your openings are standard sizes, or the condition of the framing behind them. Check the first if the project is substantial, and the rest with whoever measures.