Free SF apartment background check

633-639 Hayes St

Hayes Valley, SF 94102 0819022 6 units · 4 fl · 1900

This building has far more open problems than almost any other in the neighborhood. 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 Hayes Valley
Above average
avg 2.3
12
FewerMore

This building has 12 novs (7y), above the Hayes Valley average of 2.3.

Rent & eviction protection

Is 633-639 Hayes 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 1900
2 or more units
6 units
Property type
Multi-Family Residential
Zoning
RH3
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
Units6
Floors4
Year built1900
Total area8,012 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0819022
Ownership

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

Owner name
Hayes Valley Properties Llc
Mailing address
Fraige Alexander 447 Ivy St San Francisco CA 94102
Last sale
000000

Landlord portfolio

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

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Multiple entrances & addresses

Included addresses

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

538 Linden St, San Francisco, CA 94102
633 Hayes St, San Francisco, CA 94102
536 Linden St, San Francisco, CA 94102
635 Hayes St, San Francisco, CA 94102
639 Hayes St, San Francisco, CA 94102
637 Hayes St, San Francisco, CA 94102
Augrented Insights
Initial analysis

The 633-639 Hayes Street property is a four-story, six-unit multi-family residential building constructed in 1900, currently owned by Hayes Valley Properties LLC. The building has experienced persistent maintenance and safety issues, with multiple active violations as of 2023, including problems with heating systems, window maintenance, and building security. Most notably, there are several active violation notices from 2016 that remain unresolved, concerning the need for proper heating systems, carbon monoxide detectors, fire escape maintenance, and various other safety requirements. A more recent serious concern was filed in July 2023 regarding the building's vacant or abandoned status, indicating possible deterioration or lack of occupancy. Additional complaints from early 2023 highlighted issues with rotting window frames and rear stairs, while February 2024 brought up concerns about potential asbestos in the basement.

Historical records show that the building has undergone various repairs and compliance work over the years, including stairway repairs in 2002, window sash frame repairs in 2009, and water heater replacement in 2006. However, many of these repairs appear to have been temporary solutions, as similar issues have re-emerged over time. The property has also faced challenges with unauthorized modifications, including a 2015 complaint about an unpermitted wall construction that affected sprinkler coverage, and multiple complaints about illegal unit conversion and dangerous conditions. Recent 311 calls indicate ongoing community concerns about the building's condition and surroundings, including reports of encampments and general maintenance issues near the property. While some earlier violations from 2006-2009 were addressed, as indicated by completed permits, the persistence of more recent violations suggests continuing maintenance and safety compliance challenges.

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

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Risk rating

How 633-639 Hayes 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
4th percentile

Out of 1027 buildings in this neighborhood, 986 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
16%
No DBI
violation
84%
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.

DBI tenant complaints (past 7 years)

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

Neighborhood (ZIP code)

The ZIP code captures local housing market and enforcement patterns that affect all buildings in the area.

12-Month severity forecast
No violation 7.2%
Moderate concern 84.5%
Severe concern 8.3%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

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The story over time

633-639 Hayes St event timeline

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

2026
Building Violation (NOV) Mar 03 Serious
Based on an inspection conducted on 03/03/2026, the department has determined that the property meets the definition of a vacant or abandoned building under sfbc 103a.4.1, and is not registered as required by 103a.4.2. the failure to register and maintain the building as required has resulted in unsafe and blighted conditions as defined under sfbc 102a and administrative code chapter 80. violation include: 1. failure to register as a vacant building sfbc 103a.4.2 2. failure to pay annual registration fee table 1a-j 3. failure to post required signage sfbc 103a.4.4 4. failure to maintain exterior and interior sfbc 103a.4.5.1 & 103.a/4.5.2 5. failure to secure the property sfbc 103a.4.5.3 6. public nuisance condition sfbc 103a.4.7. & 102 a monthly monitoring fee section 110a table 1a-k
DBI ComplaintMar 03
Vacant building

See all 12 events

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

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Every record we have

Full data for 633-639 Hayes St apartments

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

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