Mission San Buenaventura and Mission Compound Site
Why it's listed
Mission San Buenaventura and its surrounding compound occupy about 29.4 acres in the city of San Buenaventura, California. The mission was the ninth of 21 founded in upper California by the Franciscan Fathers, with building activity running from its founding in 1782 until secularization in 1836. The brick church, about 40 by 140 feet, was dedicated in 1809 and keeps an exterior much like the original. Around it, the ground holds foundations of numerous Mission Period outbuildings, including excavated remains of a ten-room structure, a well, a gate, garden walls and five buildings found in 1974, one of which may be an earlier mission church. An aqueduct filtration building, settling tank and reservoir also survive. Beneath these layers lie prehistoric remains from a Chumash rancheria. The district was listed because these remains are the only archaeological source of information on Mission Period San Buenaventura and could reveal settlement patterns across the California mission system.
Significance in brief: The district holds the only known archaeological remains of Mission Period San Buenaventura, along with the standing mission church, an aqueduct filtration building and parts of the water system. It also covers a known Chumash rancheria site with prehistoric deposits beneath the mission remains. It represents early California settlement and one of the first permanent European settlements on the west coast.
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 75000496, listed April 10, 1975. Summary generated October 2026 (model claude-sonnet-5-5, prompt v1.0-2026-10-29, confidence medium).
Key facts
| Address | Bounded by Poli St., Ventura and Santa Clara Aves., and Palm St., San Buenaventura |
|---|---|
| County | Ventura County |
| Listed | April 10, 1975 |
| Reference number | 75000496 |
| Resource type | District |
| Architect / builder | Franciscan Fathers |
| Areas of significance | Prehistoric, Historic - Aboriginal, Historic - Non-Aboriginal, Religion |
| Level of significance | State |
| Status (as stated in the nomination) | Mission church described as in excellent condition with some interior alterations; surrounding area extensively altered above ground, with archaeological remains intact below the surface. A county museum and city park were planned. |
| Acreage | 29.4 |
| Coordinates | 34.28016, -119.29882 (NPS GIS) |
What listing means for this property
This is a historic district. Buildings within its boundary are either contributing (they add to the district's significance) or non-contributing. Owners of contributing income-producing buildings can claim the 20% federal rehabilitation tax credit; homeowners should look at state credits. National Register districts impose no design review by themselves; a local historic district ordinance, if one exists, does (the difference explained).
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 75000496.
- Nomination form (PDF, National Archives) — catalog entry
- Wikipedia article (used for cross-checking only; text not reproduced here)
- Wikidata Q12061890
- This listing as JSON
Last updated October 2026. Found an error? See the editorial policy for how to report it.