Exact federal listing answer
Is Clapp Houses on the National Register?
Yes · NPS status: Listed
Yes. Reference 74000911 is listed.
Yes. The U.S. National Park Service listed-properties dataset through May 22, 2026 identifies Clapp Houses as Listed in the National Register of Historic Places under reference 74000911.
Federal statusListed
National Register reference74000911
Listed dateMay 2, 1974
Property categoryBuilding
Published address199 and 195 Boston St.
LocalityBoston, Suffolk County, Massachusetts
Significance levelLocal
Published acreage1
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: AGRICULTURE, ARCHITECTURE.
Other published names: "Roger" Clap House, William Clapp House.
Same locality
Other released Boston records.
Each linked page answers a separate named federal record.