Exact federal listing answer
Is Ainsley, John Colpitts, House No. 3 on the National Register?
Yes · NPS status: Listed
Yes. Reference 05001086 is listed.
Yes. The U.S. National Park Service listed-properties dataset through May 22, 2026 identifies Ainsley, John Colpitts, House No. 3 as Listed in the National Register of Historic Places under reference 05001086.
Federal statusListed
National Register reference05001086
Listed dateOctober 3, 2005
Property categoryBuilding
Published address300 Grant St.
LocalityCampbell, Santa Clara County, California
Significance levelLocal
Published acreage1.1
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: Campbell Historical Museum and Ainsley House.
Same locality
Other released Campbell records.
Each linked page answers a separate named federal record.