Exact federal listing answer
Is Hammar, Benjamin, House on the National Register?
Yes · NPS status: Listed
Yes. Reference 92001847 is listed.
Yes. The U.S. National Park Service listed-properties dataset through May 22, 2026 identifies Hammar, Benjamin, House as Listed in the National Register of Historic Places under reference 92001847.
Federal statusListed
National Register reference92001847
Listed dateFebruary 3, 1993
Property categoryBuilding
Published address203 Cantril St.
LocalityCastle Rock, Douglas County, Colorado
Significance levelLocal
Published acreage0.9
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.
Other published names: Doctor's House (Alexander,George E.,M.D.), 5DA 645.
Same locality
Other released Castle Rock records.
Each linked page answers a separate named federal record.