Exact federal listing answer
Is Guertler House on the National Register?
Yes · NPS status: Listed
Yes. Reference 74000767 is listed.
Yes. The U.S. National Park Service listed-properties dataset through May 22, 2026 identifies Guertler House as Listed in the National Register of Historic Places under reference 74000767.
Federal statusListed
National Register reference74000767
Listed dateJuly 30, 1974
Property categoryBuilding
Published address101 Blair St.
LocalityAlton, Madison County, Illinois
Significance levelLocal
Published acreage1.2
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: ARCHITECTURE, SOCIAL HISTORY.
Other published names: Bruch-Guertler House.
Same locality
Other released Alton records.
Each linked page answers a separate named federal record.