Octagon Building
Also known as: Hall of Records
Why it's listed
Built in 1882 at a cost of $10,000, this octagonal, one-story brick building at Front and Cooper Streets in Santa Cruz served as the county's Hall of Records for eighty-six years, until a new county government building opened in 1968. Its exterior combined brick, molded sheet metal designs, a corrugated metal roof and plastered columns. The shape is said to follow a $50 gold piece minted in San Francisco in 1851-1852. The building came through the 1894 fire that destroyed the neighboring courthouse, the 1906 earthquake, and a major flood in 1955. The nomination states that it is the only brick structure of this octagonal form known to remain in California. An early 1900s addition on the Front Street side strained the walls and was slated for removal during a restoration funded by a federal preservation grant. The building was then designated the county's historical museum and information center.
Significance in brief: The nomination calls it a unique structure for its era, said to be styled after a $50 gold piece minted in San Francisco in 1851-1852. It survived the 1894 fire, the 1906 earthquake and a 1955 flood. It is believed to be the only brick building of this octagonal shape remaining in the state, and it was designated the county's historical museum.
Machine-generated summary. This summary was generated by a language model from the official nomination document and has not been reviewed line by line by an editor. It may contain errors. Check the source document before relying on any detail. Source: nomination document (PDF) · National Archives catalog entry. NRHP reference 71000193, listed March 24, 1971. Summary generated October 2026 (model claude-sonnet-5-5, prompt v1.0-2026-10-29, confidence medium).
Key facts
| Address | Corner of Front and Cooper Sts., Santa Cruz |
|---|---|
| County | Santa Cruz County |
| Listed | March 24, 1971 |
| Reference number | 71000193 |
| Resource type | Building |
| Period of significance | Built in 1882 |
| Areas of significance | Architecture |
| Level of significance | Local |
| Status (as stated in the nomination) | Restoration was reported complete in a 1975 letter, and the building is used as the Santa Cruz County Historical Museum. |
| Acreage | 0.9 |
| Coordinates | 36.97477, -122.02566 (NPS GIS) |
What listing means for this property
For an income-producing building, listing (individually or as a contributing building in a district) is the gateway to the 20% federal rehabilitation tax credit on qualified rehabilitation costs, often stackable with state credits. Work claiming the credit must follow the Secretary of the Interior's Standards and be approved in advance.
Listing does not restrict a private owner acting without federal money or permits; where federal funding or licensing is involved, Section 106 review applies.
General information, not legal or tax advice. Rules change; confirm with your State Historic Preservation Office or a qualified adviser.
Sources and further reading
- National Park Service, National Register of Historic Places database (snapshot May 2026), reference 71000193.
- Nomination form (PDF, National Archives) — catalog entry
- Wikipedia article (used for cross-checking only; text not reproduced here)
- Wikidata Q7076704
- This listing as JSON
Last updated October 2026. Found an error? See the editorial policy for how to report it.