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687-689 4Th Ave

Inner Richmond, SF 94118 1640022 3 units · 3 fl · 1911

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 Inner Richmond
At or below average
avg 0.9
0
FewerMore

This building has 0 novs (7y), at or below the Inner Richmond average of 0.9.

Rent & eviction protection

Is 687-689 4Th 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 1911
2 or more units
3 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
Units3
Floors3
Year built1911
Total area4,350 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1640022
Ownership

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

Owner name
Chester & Soo Lau 1997 Fmly
Mailing address
Chester C Lau 642 21St Ave San Francisco CA 94121
Last sale
012498

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.

689 04th Ave, San Francisco, CA 94118
687 04th Ave, San Francisco, CA 94118
Augrented Insights
Initial analysis

The three-unit residential building at 687-689 4th Avenue in the Inner Richmond, owned by Chester & Soo Lau 1997 Family, is a three-story flats and duplex structure built in 1911. The property has undergone several maintenance and improvement projects over the decades, including reroofing in 1995, concrete replacement in 1990, and garage alterations in 1987. A significant cluster of violations was documented in September 2003, including fire safety issues such as sprinkler system maintenance needs, wood stair repairs, and concerns about emergency exits and smoke detectors, though these were all abated by September 25, 2003. Another fire safety violation was recorded in June 2010 regarding combustible storage, which was resolved by August 2011.

The building has been subject to routine safety inspections over the years, with the most recent recorded in December 2015. While there have been several parking enforcement issues and street maintenance concerns in the vicinity, including reports of illegal parking and sidewalk blocking between 2014 and 2021, these external issues are not directly related to the building's condition or safety. The property has maintained compliance with building codes since the last documented violations were resolved, and there are no active violations or complaints on file as of the most recent inspections.

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

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Risk rating

How 687-689 4Th 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
34th percentile

Out of 1723 buildings in this neighborhood, 1137 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
78%
No DBI
violation
22%
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.

Estimated permit spend (past 7 years)

Dollar value of permits pulled at this address — large recent spend can signal deferred-maintenance catch-up.

Construction spend, owner's portfolio

Estimated permit value across all of this owner's buildings.

Owner's portfolio size

Number of SF parcels this owner is registered on — larger portfolios have distinct risk patterns.

12-Month severity forecast
No violation 69.4%
Moderate concern 18.9%
Severe concern 11.7%
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

687-689 4Th Ave event timeline

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

2025
311 Request Dec 09
Blocking driveway cite only
Parking Enforcement
311 RequestJan 19
Blocking driveway cite only

See all 3 events

Full history back to 2024 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 687-689 4Th 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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