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644 Hyde St

Downtown, SF 94109 0303013B 52 units · 5 fl · 1917

A handful of records on file over the last seven years, and our model predicts a high risk of further maintenance problems in the next 12 months. A few records worth reading before you sign. Check whether they were closed out, and ask what was actually fixed.

NOVs (7y) vs. neighborhood
Records already on file, against a typical building in Downtown — not a forecast
Above average
avg 6.9
8
FewerMore

This building has 8 novs (7y), above the Downtown average of 6.9.

Rent & eviction protection

Is 644 Hyde 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 1917
2 or more units
52 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.

Statewide backstop · AB 1482

California Tenant Protection Act of 2019

Even when a building isn't covered by local rent stabilization, the statewide Tenant Protection Act (AB 1482) may still apply. It caps annual rent increases and requires the landlord to state a legal reason to end most tenancies.

15+ years since occupancy
Built 1917
Annual rent increase cap
5% + CPI, max 10%
Just-cause eviction
After 12 months
Local rent control likely takes priority. This building appears to fall under the local ordinance above, which is stronger than AB 1482. Where a local just-cause ordinance applies, its rules govern instead of the state cap.

AB 1482 does not apply to single-family homes and condos unless owned by a corporation, REIT, or an LLC with a corporate member; to owner-occupied duplexes; or to deed-restricted affordable housing. The Act is in effect until January 1, 2030. Not legal advice — see the California landlord–tenant guide.

Building characteristics
Units52
Floors5
Year built1917
Total area20,998 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0303013B
Ownership

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

Mailing address
Mosser Company 308 Jones St San Francisco CA 94103
Last sale
August 11, 2014

Landlord portfolio

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

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Multiple entrances & addresses

Included addresses

All street addresses sharing this blocklot that are covered by this report.

644 Hyde St, San Francisco, CA 94109
881 Post St, San Francisco, CA 94109
895 Post St, San Francisco, CA 94109
891 Post St, San Francisco, CA 94109
Augrented Insights
Initial analysis

The 644 Hyde Street property, built in 1917, is a 5-story multi-family residential building with 52 units managed by Fo 891 Post Street Property. The building has undergone significant renovations and improvements over recent years, including a fire alarm upgrade in August 2023, multiple unit renovations (apartments 305, 201, and others) involving kitchen and bathroom remodeling between 2016-2022, and the conversion of a former laundromat into a bar in 2018 (with associated plumbing and electrical upgrades). The property has experienced various maintenance and compliance issues, most notably recent concerns with the boiler permit renewals filed in July 2024, and an active complaint regarding unsanctioned use of the closed business's awning as shelter (Dec 2024). Historical violations include a 2004 tenant improvement issue regarding unpermitted work, elevator service problems in 2015-2018, and a failure to comply with the mandatory Soft Story Retrofit Program requirements noted in 2014.

Recent building activity suggests ongoing maintenance and upgrading of basic systems, though there are notable concerns regarding permit compliance and exterior maintenance. The building has experienced multiple false fire alarms and detector activations over the years, with the most recent fire violation related to sleeping area requirements issued in November 2023. The property has undergone significant interior improvements throughout its history, with particular attention to modernizing individual unit amenities and common areas, though there have been periodic lapses in compliance with various building maintenance requirements that required correction. The ground floor commercial spaces have seen notable transitions, including the conversion from laundromat to bar, with associated renovation work generating both permits and some compliance issues during construction.

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

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Risk rating

How 644 Hyde 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

Lower risk — safer than most nearby

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

Typical — about average for the neighborhood

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

Higher risk — riskier than most nearby

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

Neighborhood percentile
21stpercentile

Out of 448 buildings in this neighborhood, 354 are predicted to be safer. The band is relative to this neighborhood, so a share of every neighborhood falls in each colour.

RiskiestSafest
Predicted 12-month outcome
9%
No DBI
violation
91%
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.

Number of units

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

Building size

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

Neighborhood location

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

12-Month risk forecast
High failure risk 91%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

644 Hyde St apartment reviews

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On the map

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The story over time

644 Hyde St event timeline

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

2026
Fire Complaint Jul 01
Alarm Systems
DBI ComplaintJun 15
Vacant building

See all 24 events

Full history back to 2022 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 644 Hyde St apartments

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

Side by side

How 644 Hyde St compares to the neighborhood

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

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