Free SF apartment background check

989-991 Duncan St

Diamond Heights, SF 94131 7513028 2 units · 2 fl · 1962

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 Diamond Heights
At or below average
avg 0.0
0
FewerMore

This building has 0 novs (7y), at or below the Diamond Heights average of 0.0.

Rent & eviction protection

Is 989-991 Duncan 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 1962
2 or more units
2 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
Units2
Floors2
Year built1962
Total area2,680 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot7513028
Ownership

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

Owner name
Harry & Nancy Yee Family Tr
Mailing address
Harry & Nancy Yee, Trustees 989 Duncan St San Francisco CA 94131
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.

991 Duncan St, San Francisco, CA 94131
989 Duncan St, San Francisco, CA 94131
Augrented Insights
Initial analysis

The property at 989 Duncan Street is a two-unit, two-story multi-family residential building located in San Francisco's Diamond Heights neighborhood. Built in 1962 and currently owned by the Harry & Nancy Yee Family Trust, the building has undergone significant improvements in 2024, including comprehensive renovations to both units. These improvements encompass kitchen remodels, bathroom renovations, and electrical rewiring work completed in early 2024, with a total project cost of approximately $275,000. The property is also receiving structural and aesthetic upgrades, including reroofing work (completed August 2024 at a cost of $12,800), repair of rear decks, replacement of exterior siding, and installation of new windows and sliding doors, with these permit costs totaling $50,000.

Recent maintenance issues have primarily centered around tree-related concerns, with multiple 311 calls regarding lifted sidewalks due to tree roots and overgrown trees, most of which remain open as of late 2024. The building's immediate vicinity has experienced several environmental maintenance challenges over the past year, including instances of graffiti (which has been addressed), a fallen tree incident in August 2023, and various park structural maintenance requests. While these external issues do not directly impact the building's interior conditions, they represent ongoing environmental considerations for the property. The extensive renovation work completed and in progress throughout 2024 suggests proactive property management, particularly focusing on modernizing both units' facilities while addressing various structural elements of the building.

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

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Risk rating

How 989-991 Duncan 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
76th percentile

Out of 17 buildings in this neighborhood, 4 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
93%
No DBI
violation
7%
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.

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.

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 91.1%
Moderate concern 7.1%
Severe concern 1.8%
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

989-991 Duncan St event timeline

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

2025
Electrical Permit May 08
Service upgrade
Issued

See all 6 events

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

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Every record we have

Full data for 989-991 Duncan St apartments

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

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