Exact federal listing answer
Is Flagg, James Montgomery, House on the National Register?
Yes · NPS status: Listed
Yes. Reference 80000260 is listed.
Yes. The U.S. National Park Service listed-properties dataset through May 22, 2026 identifies Flagg, James Montgomery, House as Listed in the National Register of Historic Places under reference 80000260.
Federal statusListed
National Register reference80000260
Listed dateApril 23, 1980
Property categoryBuilding
Published addressSt. Martin's Lane
LocalityBiddeford, York County, Maine
Significance levelNational
Published acreage0.3
Exact answer boundaryThis confirms the named federal record only.
It does not prove that another address lies inside this property or district, establish local landmark status, decide preservation review, define a legal boundary, or describe ownership or current condition.
Why the wording is date-boundedThe answer reflects the NPS dataset published through May 22, 2026 and a live NPS GIS Listed-status cross-check made September 20, 2026. NPS notes that spatial points and polygons may need correction and are not legal documents.
Additional published fields
Areas of significance: ART.
Same locality
Other released Biddeford records.
Each linked page answers a separate named federal record.