HCM-31 — designated 1965-01-22
Rancho Sombra del Roble (Orcutt Ranch Park)
23555 Justice Street
stone-family or non-stone masonry construction per bariscale material classification — the envelope is the artifact, architectural-significance argument unambiguous regardless of per-axis rubric signals. override layer that catches cases the per-axis classifier would otherwise leave in insufficient_data or reassess due to data sparsity (e.g. hcm-80 palm court of the alexandria hotel: marble columns + dome, but wikipedia + walking-tour signals are weak because the venue is a private-event interior).
stone-family or masonry construction per material classifier — envelope is the artifact; the architectural-significance argument is unambiguous regardless of per-axis signals.
street view ↗ satellite ↗ big orange landmarks ↗ (bariscale, 2007) stone · limestone + cast-iron (orchestrator-captured imagery is not building-aimed — use these for HITL verification)
Six-axis scores
- A. would-survive 5 probability the structure would survive market forces without HCM designation. low = needs protection.
- B. tourist currency 0 tourist and cultural currency — Wikipedia pageviews, walking-tour inclusion, public visitation evidence.
- C. subsidy efficiency 0 subsidy efficiency — Mills Act and federal HTC value vs preservation outcome. zero means no active subsidy.
- D. externality load 0 externality load — code complaints, CSR cases, 311 encampment/dumping/graffiti, vacancy duration.
- E. neighborhood health 7 neighborhood health — median household income, distress indicators, displacement risk.
- F. alternative-use value 5 alternative-use value — parcel acres, TOC tier, TPA eligibility, zoning capacity for higher use.
overall confidence: unknown
Site
- lat / lon
- 34.21792, -118.64151
- parcel acres
- 24.15733788031214 (inferred)
- typology
- civic
- TPA / TOC
- no
- zoning capacity
- —
- nrhp listed
- no
- architect prominence
- —
Condition + subsidy
all "condition" fields below are proxies derived from LADBS permit history, 311 CSR cases, and code complaints. none of these directly measures occupancy. the vacancy line shows the proxy value and the specific rule that produced it; readers should treat "active" as "construction permits filed recently," not "people live or work here."
- vacancy proxy
- unknown
- vacancy proxy basis
- no signal
- last permit
- —
- permits last 24mo
- 0
- code complaints 24mo
- 0
- CSR open cases
- 0
- Mills Act contract
- no — not in la OHR appendix a (2019 list of Mills Act properties)
- federal HTC
- no
- Wikipedia pageviews 12mo
- —
- walking-tour inclusion
- no
- median hhi (tract)
- $134,018
- assessed value
- —
Contextual signals (GIS)
these are contextual proxies — signals derived from spatial context, not direct measurements of the property. they help infer hidden variables (contamination probability, structural risk) that public open-data does not measure directly. source: cal OEHHA CalEnviroScreen 4.0 (cumulative pollution burden by census tract).
- census tract
- 6037134423
- CalEnviroScreen overall percentile
- 34.7 (decile 4)
- cleanups percentile
- 19.9
- groundwater threats percentile
- 56.9
- hazardous waste percentile
- 35.6
- toxic release percentile
- 41.0
- lead exposure percentile
- 25.9
- EnviroStor cleanup sites nearby
- —
- in CGS liquefaction zone
- yes — designated under seismic hazards mapping act of 1990
- type-1 contamination probability (fused)
- 0.36 — low
- type-2 structural-risk probability
- 0.80 — elevated (liquefaction zone membership combined with pre-modern-code designation date)
Narrative
history
rancho sombra del roble, commonly known as orcutt ranch park, is a historic estate located in the west hills (formerly canoga park) area of los angeles. the property was developed in the early twentieth century as the country retreat of william warren orcutt, a prominent geologist and oil executive who worked for union oil company and is credited with identifying the la brea tar pits as a significant paleontological site. the main residence and associated structures were constructed approximately in the 1920s, reflecting the era's taste for spanish colonial revival architecture and the gentleman-rancher lifestyle favored by wealthy angelenos seeking escape from the urban core. the estate featured extensive citrus orchards, a working ranch, and mature oak groves — the latter giving the property its spanish name, meaning 'ranch in the shadow of the oak.' following orcutt's death, the property passed through private hands before the city of los angeles acquired it (approximately in the 1960s), subsequently converting it into a public park administered by the los angeles department of recreation and parks. the site hosts a horticultural center and remains open to the public, with the grounds maintained as a historic landscape.
architectural significance
the primary structures at orcutt ranch exhibit spanish colonial revival characteristics consistent with southern california residential architecture of the 1920s, including red-tile roofing, stucco exterior walls, arched openings, and low-pitched rooflines. this idiom was widely practiced across los angeles during the period and has numerous surviving comparators — among them adamson house in malibu, the lopez adobe in san fernando, and various private estates converted to civic use throughout the san fernando valley. the architectural distinction of orcutt ranch lies less in the structures themselves, which are competent but not exceptional examples of the type, and more in the integration of the built environment with the surrounding mature oak woodland and historic agricultural landscape. no named architect of regional or national prominence has been firmly associated with the design of the principal structures based on available records.
neighborhood context
the census tract surrounding orcutt ranch park records a median household income of approximately $134,018, placing it well above both the los angeles citywide median and the regional average — a profile consistent with the established, predominantly single-family residential character of west hills. the tract experienced a modest population decline of 114 persons over the most recent five-year measurement period, suggesting demographic stability rather than growth pressure or displacement stress. the 311 load data for the immediate vicinity registers zero encampment, dumping, or graffiti incidents within 500 feet over the measured period, indicating minimal externality burden on surrounding parcels. no transit priority area or transit-oriented community overlay has been identified for this location, consistent with west hills' car-dependent suburban morphology and low redevelopment pressure. | metric | value | |---|---| | census tract | 06037134423 | | median hhi | 134018 | | 5yr δ population | -114 | | 311 within 500ft (24mo) | 0 | | encampment 311 calls | 0 | | ladbs code complaints (24mo) | — | | last permit year | — |
subsidy and condition
| field | value | |---|---| | mills act | — | | federal htc | — | | vacancy status | — |
classification reasoning
axis a (survival without protection) scores 5 at medium confidence. the property is city-owned parkland, meaning market-driven demolition pressure is structurally low under current ownership; however, the score does not reach high because city ownership does not preclude deaccession, adaptive conversion, or deferred maintenance that could compromise historic fabric over time. the absence of nrhp listing and unconfirmed architect prominence reduce the upper bound. axis b (tourist/cultural currency) scores 0 with unknown confidence; no google review data, wikipedia pageview data, walking tour inclusion, or tripadvisor presence was recoverable, making it impossible to assess external visitation draw. this is a significant data gap, not a confirmed finding of zero draw. axis c (subsidy efficiency) scores 0 with unknown confidence due to complete absence of mills act contract data, federal historic tax credit utilization records, or documented subsidy expenditures — the property may receive city maintenance funding not captured in hcm-specific subsidy tracking. axis d (externality load) scores 0 with medium confidence; the 311 data is substantively clean and the site appears to generate no measurable negative spillover onto adjacent parcels. axis e (neighborhood health) scores 7 at high confidence, driven by the $134,018 median hhi and stable demographic trajectory; the tract is not in distress and does not present gentrification-driven displacement risk. axis f (alternative use value) scores 0 with unknown confidence; parcel acreage, zoning capacity, and tpa/toc designation are all unrecorded in the fetched data, making it impossible to assess redevelopment yield. the candidate flag is not triggered: e scores 7, exceeding the e_max threshold of 5 required for candidacy, and f scores 0 with unknown confidence rather than meeting the f_min of 6. the reassess flag is appropriate given that three of six axes carry unknown confidence, including the two axes (b and f) most relevant to determining whether hcm status delivers net public value.
sources
- la311: https://data.lacity.org/resource/h65r-yf5i.json?$where=within_circle(location%2c%2034.21792117378398%2c%20-118.64151069394381%2c%20152)%20and%20createddate%20%3e%20'2024-05-10'&$limit=1000 --- _generated by hcm-1200 orchestrator on 2026-05-10t22:07:36.999z._