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851 Post St

Downtown, SF 94109 0303017 22 units · 4 fl · 1919

This building has a higher-than-average number of open problems nearby. Renters here report frequent, slow-to-fix problems. Get repair promises in writing and check the unit before signing.

NOVs (7y) vs. neighborhood
Compared to a typical building in Downtown
Above average
avg 6.9
17
FewerMore

This building has 17 novs (7y), above the Downtown average of 6.9.

Rent & eviction protection

Is 851 Post St rent-controlled?

San Francisco's Rent Ordinance caps rent increases and provides eviction protection for most residential units built before 1979 with 2+ units. Here's how this building scores.

Built before 1979
Built 1919
2 or more units
22 units
Property type
Multi-Family Residential
Zoning
RC4
Likely rent-controlled. Building age and unit count suggest this property falls under San Francisco's Rent Ordinance.

Based on SF Assessor records. Not legal advice — confirm with the SF Rent Board.

Building characteristics
Units22
Floors4
Year built1919
Total area21,244 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0303017
Ownership

Registered owner per SF Assessor-Recorder (secured roll).

Owner name
H/S Partners Ii Lp
Mailing address
1704 Union St San Francisco CA 94123
Last sale
060998

Landlord portfolio

Other SF properties this owner holds, with risk grades for each.

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Augrented Insights
AI summary

The 22-unit, 4-story apartment building at 851 Post Street, owned by H/s Partners Ii Lp, has a storied history since its construction in 1919, with several significant events affecting resident experience and safety. Most recently, there are open fire violations from November 2023 regarding sleeping area requirements, though a standpipe violation from October 2023 has been abated. The building underwent substantial electrical work in 2023, with new installations including a subpanel and multiple circuits. Earlier this decade, the building faced multiple safety-related issues, including 8 building violations in 2003 related to security, fire safety, smoke detection, and sanitation, all of which were abated by June 2013. These violations highlighted problems with self-closing doors, smoke detectors, stairs, fire escape ladders, and a cockroach infestation.

The property has seen various infrastructure improvements over the years, including a seismic retrofit in 1997, parapet safety work in 1987, and significant plumbing upgrades such as a new steam boiler in 2018 and hot water system replacement in 2013. Recent fire safety concerns were documented in late 2023, showing ongoing maintenance needs. The building has experienced several elevator rescue incidents and false alarm activations, but with no civilian injuries reported. While historical complaints from 2003-2004 noted water damage, mold, and pest issues, most recent complaints have been limited primarily to boiler permit compliance matters. The surrounding area has faced recurring challenges with street conditions, as evidenced by multiple reports of garbage and debris from 2024, though these are external to the building itself.

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Risk rating

How 851 Post St's risk score is calculated

We trained a model on 7 years of SF DBI inspection data — notice of violation filings, complaint history, and owner track records. It estimates the probability that DBI inspectors will issue a Notice of Violation at this address in the next 12 months. Lower % = safer.

What the score means for you

Grade A–B — Low risk

DBI rarely finds violations here. Strong maintenance history and a clean complaint record.

Grade C — Moderate risk

Some past violations or complaints on record. Worth asking the landlord about any open issues before signing.

Grade D–F — High risk

Elevated violation and complaint history. DBI has found issues here before and is statistically likely to again.

Neighborhood percentile
44th percentile

Out of 448 buildings in this neighborhood, 251 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
15%
No DBI
violation
85%
DBI violation
likely
Model explanation

What's driving this score

The three data points that most influenced this building's risk rating — ranked by the weight the model placed on each one.

Building size

Total floor area — a proxy for building scale and the number of systems (plumbing, electrical, HVAC) that can fail.

Number of units

The number of units affects how the model reads complaint and violation totals — more units means more potential sources.

Neighborhood location

Precise location is a proxy for neighborhood-level risk — some SF blocks have systematically higher DBI activity.

12-Month severity forecast
No violation 13.2%
Moderate concern 82.8%
Severe concern 4.0%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

851 Post St apartment reviews

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The story over time

851 Post St event timeline

Violations, complaints, fire incidents, permits, and buyouts — most recent records in order.

2025
Building Violation (NOV) Apr 30
Building violation
The permit to operate the boiler that's now posted expires 5/15/25. post a copy of the current annual permit to operate in a conspicuous pl…
Building Violation (NOV)Apr 30
Building violation

See all 11 events

Full history back to 2023 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 851 Post St apartments

13 SF public datasets for this parcel — permits, violations, complaints, fire records, 311 calls, planning records, and buyouts.

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Cancel anytime · Data sourced from SF Open Data, DBI, SFFD, SF Rent Board & Planning

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