HCM-99 — designated 1972-04-05
Residence
1036-1038 South Bonnie Brae Street
public open-data signals are too weak to classify; designation may be load-bearing via procedural friction, may be recognition only — rubric cannot tell without a demolition-pressure proxy
cannot classify — public open-data signals are too weak. would need a demolition-pressure proxy to resolve.
street view ↗ satellite ↗ big orange landmarks ↗ (bariscale, 2007) (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 3 neighborhood health — median household income, distress indicators, displacement risk.
- F. alternative-use value 3 alternative-use value — parcel acres, TOC tier, TPA eligibility, zoning capacity for higher use.
overall confidence: unknown
Site
- lat / lon
- 34.04968, -118.27801
- parcel acres
- 0.17261352716228645 (inferred)
- typology
- sfr
- TPA / TOC
- yes — tier 2
- 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
- active
- vacancy proxy basis
- recent investment over 250k in 60mo
- last permit
- 2023
- 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)
- $43,266
- assessed value
- —
Street view vision classification
claude vision analyzed 4 Google street view captures (n/e/s/w from the parcel coordinates) for visible distress indicators. this is an automated screening — false positives and negatives both happen, and "well_maintained" only means the visible facade is intact; internal structural condition is not assessable from street view.
- building visible
- yes
- building type
- multifamily
- overall condition
- distressed
- type-2 indicators (residential distress)
- vegetation overgrowth, fence collapse
- other indicators
- graffiti
- notes
- The pink/blue Victorian multifamily structure visible at heading 270° shows significant clutter, overgrown vegetation, graffiti on the chain-link fence, and general deferred maintenance indicative of a distressed condition.
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
- 6037209520
- CalEnviroScreen overall percentile
- 92.5 (decile 10)
- cleanups percentile
- 75.1
- groundwater threats percentile
- 43.8
- hazardous waste percentile
- 72.7
- toxic release percentile
- 79.4
- lead exposure percentile
- 89.7
- EnviroStor cleanup sites nearby
- —
- in CGS liquefaction zone
- no
- type-1 contamination probability (fused)
- 0.75 — high (CalEnviroScreen tract burden + parcel-level EnviroStor proximity both signal contamination context)
- type-2 structural-risk probability
- 0.20 — low
Narrative
history
hcm-99 is classified generically as a single-family residence, and the fetched record contains no build date, architect attribution, or documented historical events. without these data points, no factual construction timeline can be established. the absence of nrhp listing and any architect prominence rating further obscures the structure's origins. it is unknown whether the property has experienced major ownership changes, significant renovation events, or association with historically notable occupants. any claims about the building's specific history would be speculative at this stage and are withheld pending field research and archival record retrieval.
architectural significance
no architectural style data, comparable-examples survey, or distinctive-feature documentation exists in the fetched record for hcm-99. the typology is logged as single-family residential, which in los angeles spans an extraordinarily broad range — from craftsman bungalows (c. 1905–1930) to postwar minimal traditional tracts to mid-century modern custom homes — none of which can be attributed here without physical inspection or permit-history review. a field visit combined with a dpr 523 form review is the minimum threshold for producing a defensible architectural characterization.
neighborhood context
the tract surrounding hcm-99 presents measurable indicators of economic stress. the median household income is $43,266 — well below the citywide los angeles median (approximately $71,000 as of the most recent acs five-year estimates), placing this tract in the lower income quartile for the city. population declined by 448 residents over the measured five-year window, consistent with either housing loss, displacement pressure, or outmigration tied to cost burden or disinvestment. the 311-derived externality signals (encampments, dumping, graffiti) all register at zero within 500 feet of the parcel over 24 months, though these figures may reflect underreporting or data-retrieval gaps rather than confirmed absence of conditions. transit proximity and toc/tpa tier are unrecorded. | metric | value | |---|---| | census tract | 06037209520 | | median hhi | 43266 | | 5yr δ population | -448 | | 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 (would_survive_without_protection) is scored 5 at medium confidence, reflecting genuine ambiguity: no nrhp listing, no known prominent architect, and no documented recent owner investment exist to anchor a stronger survivability argument in either direction. a mid-range score is the honest default given data sparsity — the structure is neither clearly irreplaceable nor demonstrably at immediate demolition risk under market forces alone. axis b (tourist_cultural_currency) scores 0, driven by null values across every tourism and cultural-currency signal: no google reviews, no wikipedia pageview data, no walking-tour inclusion. confidence is logged as unknown, meaning the zero score reflects absence of evidence rather than confirmed cultural insignificance — though for a generic single-family residence with no documented notable associations, low cultural currency is the plausible prior. axes c (subsidy_efficiency) and f (alternative_use_value) both score 0 with unknown confidence, entirely attributable to missing mills act contract data, federal htc data, parcel acreage, zoning capacity, and tpa/toc tier. these are data failures, not findings. axis d (externality_load) scores 0 at medium confidence; the 311-derived counts are all zero and vacancy status is null, providing a partial but not complete picture of neighborhood burden. axis e (neighborhood_health) scores 3 at high confidence — the strongest evidentiary finding in this record. the $43,266 median hhi and -448 five-year population change jointly signal a distressed or transitional tract, and this axis score is reliable. the candidate flag requires a ≤ 4, b ≤ 3, c ≥ 6 or d ≥ 6, e ≤ 5, and f ≥ 6, all at minimum medium confidence. hcm-99 meets a (borderline at 5 — narrowly fails), b, and e conditions, but fails the c/d gating condition (both score 0 with unknown confidence) and f (0, unknown confidence), and overall confidence is logged as unknown. because multiple gating axes have unknown confidence and critical scores are uncomputable due to missing data, candidate designation cannot be responsibly assigned. reassess is the correct flag: the neighborhood-health signal is genuine and warrants follow-up, but the data gaps across axes c, d, and f — and the absence of any architectural or historical documentation — make any stronger classification indefensible without field validation and record remediation.
sources
- la311: https://data.lacity.org/resource/h65r-yf5i.json?$where=within_circle(location%2c%2034.04967865238539%2c%20-118.27800949236328%2c%20152)%20and%20createddate%20%3e%20'2024-05-10'&$limit=1000 --- _generated by hcm-1200 orchestrator on 2026-05-10t22:42:38.028z._