Free SF apartment background check

840 Post St

Downtown, SF 94109 0300021 90 units · 9 fl · 1990

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
At or below average
avg 6.9
0
FewerMore

This building has 0 novs (7y), at or below the Downtown average of 6.9.

Rent & eviction protection

Is 840 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 1990
2 or more units
90 units
Property type
Multi-Family Residential
Zoning
RC4
Not rent-controlled. Buildings constructed after 1978 are generally exempt from SF rent increase limits under the Costa-Hawkins Act.

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

Building characteristics
Units90
Floors9
Year built1990
Total area107,900 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0300021
Ownership

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

Owner name
Avalon Bay Communities Inc
Mailing address
Tax Department 671 N Glebe Rd #800 Arlington VA 22203
Last sale
101999

Landlord portfolio

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

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Augrented Insights
Initial analysis

840 Post Street is a 9-story, 90-unit multi-family residential building owned by Avalon Bay Communities Inc, constructed in 1990 in San Francisco's Downtown district. The property has undergone several significant safety system upgrades in recent years, including a substantial $732,772 modification to the fire alarm system in December 2023 to comply with current fire codes, and the addition of low-frequency sounders in sleeping areas approved in July 2024. The building's elevator and fire system infrastructure have also seen improvements, with work completed in 2022 focusing on elevator controller upgrades and the removal of sprinkler systems from the elevator pit, totaling over $110,000 in combined costs. The property has maintained its commitment to sustainability with the installation of 12 electric vehicle charging stations in 2019.

The building has experienced recurring maintenance and habitability issues, particularly in its earlier years, with several documented incidents of mold and moisture problems between 1999 and 2011. More recent complaints from 2021 and 2022 have raised concerns about construction impacts on emergency egress, window sealing issues, and insect/rodent presence in some units. A notable safety concern was reported in July 2021 regarding a maintenance trailer allegedly used for illicit activities near unit windows, though this complaint is now listed as not active. The building's fire safety systems have undergone regular inspections and improvements, with the most recent citation in October 2023 regarding sleeping area requirements, though this appears to have been promptly addressed. The property's location has experienced typical urban challenges, as evidenced by multiple recent 311 calls in late 2024 regarding street cleaning and debris issues, though these are primarily related to the building's vicinity rather than internal conditions.

AI-generated · may contain errors · check the source data tables below

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Risk rating

How 840 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
41th percentile

Out of 448 buildings in this neighborhood, 264 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
14%
No DBI
violation
86%
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.

DBI tenant complaints (past 7 years)

Formal complaints tenants filed with DBI about this building over 7 years.

12-Month severity forecast
No violation 14.3%
Moderate concern 81.3%
Severe concern 4.4%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

840 Post St apartment reviews

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The story over time

840 Post St event timeline

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

2026
DBI Complaint May 28
Date last observed: 27-may-26; exact location: main bldg; building type: residence/dwelling mold; other housing; ; additional information: build up of mold, dust & residue in building's hvac system that has not been cleaned in years. exterior covers of vents in common areas are superficially cleaned but the aforementioned toxins can be seen just by peering inside the covers with naked eye. the problem is worse inside residential units where the dirt, dust, mold drapes or clogs the vent covers & continues to accumulate despite cleaning occasional cleaning by individual residents. vents in each unit/dwelling located in the bathroom. violation of sf housing code ch 10, sec 1001(a) & 1991(b). also possibly sf housing code ch 5, sec 504 and ca civil code sec 1941.1 which necessitates ventilation systems function properly to prevent moisture build up & mold.;
Housing Inspection Services

See all 15 events

Full history back to 2019 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 840 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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