Free SF apartment background check

591-597 20Th Ave

Central Richmond, SF 94121 1563014 4 units · 2 fl · 1920

This building has a higher-than-average number of open problems nearby. Few open issues; problems get fixed quickly. A reasonable bet for a smooth tenancy.

NOVs (7y) vs. neighborhood
Compared to a typical building in Central Richmond
At or below average
avg 0.5
0
FewerMore

This building has 0 novs (7y), at or below the Central Richmond average of 0.5.

Rent & eviction protection

Is 591-597 20Th Ave 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 1920
2 or more units
4 units
Property type
Multi-Family Residential
Zoning
RH2
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
Units4
Floors2
Year built1920
Total area4,430 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1563014
Ownership

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

Owner name
Digrande Family Trust
Mailing address
Gracie Digrande 139 10Th Ave San Francisco CA 94118
Last sale
103194

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.

593 20th Ave, San Francisco, CA 94121
591 20th Ave, San Francisco, CA 94121
595 20th Ave, San Francisco, CA 94121
597 20th Ave, San Francisco, CA 94121
Augrented Insights
Initial analysis

The 4-unit, 2-story multi-family residential building at 591-597 20th Avenue in the Central Richmond neighborhood, owned by the Digrande Family Trust, has undergone significant recent renovations and maintenance since 2022. Most notably, substantial apartment improvements have been made in 2023-2024, including complete bathroom additions, kitchen remodels, and laundry room installations in units 593 and 597, with associated electrical work including new lighting, outlets, and smoke detectors. A critical infrastructure upgrade occurred in 2017 with the replacement of a 15-foot sewer lateral section, converting from clay to cast iron piping. The building's maintenance history shows attention to both internal and external needs, with various repairs and improvements documented over the years, including sidewalk repairs in 2007 and roofing work in 2000.

Historical records reveal some past concerns during the 2000-2001 period, including routine inspections that identified issues such as inadequate insulation, stair and floor conditions, and missing safety equipment, though these violations were promptly addressed within weeks. Recent years show no active building violations, and current maintenance appears focused on modernizing and improving unit amenities. The property has experienced periodic street-related issues, as evidenced by multiple 311 calls in 2022-2024, primarily regarding parking enforcement and street cleanliness, though these are external to the building's structural and safety systems. A single fire alarm activation was recorded, determined to be a malfunction with no injuries reported. The most recent construction activity as of early 2024 includes comprehensive unit improvements totaling over $120,000 in recent renovation work, suggesting ongoing commitment to maintaining and upgrading the property.

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

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Risk rating

How 591-597 20Th Ave'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
69th percentile

Out of 2250 buildings in this neighborhood, 698 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
87%
No DBI
violation
13%
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.

Neighborhood location

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

Building age

Older buildings tend to have more maintenance challenges; SF's pre-1906 earthquake housing stock carries distinct risk.

12-Month severity forecast
No violation 79.6%
Moderate concern 9.5%
Severe concern 11.0%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

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The story over time

591-597 20Th Ave event timeline

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

2025
311 Request Oct 15
Sewage back-up discharge
from other location
311 RequestJan 01
Garbage and debris

See all 11 events

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

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Every record we have

Full data for 591-597 20Th Ave 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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