Free SF apartment background check

121 Day St

Noe Valley, SF 94131 6637036 10 units · 3 fl · 1964

This building has a substantial enforcement record over the last seven years, and our model predicts continuing maintenance failures over the next 12 months. Read the records below before you sign. Ask which issues were resolved, get repair commitments in writing, and inspect the unit yourself.

NOVs (7y) vs. neighborhood
Records already on file, against a typical building in Noe Valley — not a forecast
Above average
avg 1.2
7
FewerMore

This building has 7 novs (7y), above the Noe Valley average of 1.2.

Rent & eviction protection

Is 121 Day 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 1964
2 or more units
10 units
Property type
Multi-Family Residential
Zoning
RM1
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 1964
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
Units10
Floors3
Year built1964
Total area6,736 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot6637036
Ownership

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

Mailing address
Lillie Wong, Trustee 664A Guerrero St San Francisco CA 94110
Last sale
—

Landlord portfolio

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

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Augrented Insights
Initial analysis

The 10-unit multi-family residential building at 121 Day St in Noe Valley, owned by the Lee/wong Marital Trust, has undergone several significant improvements since its construction in 1964. Most notably, the building completed mandatory Tier 3 seismic (soft story) upgrades in 2015, including new foundations and shearwalls, with a Certificate of Final Completion issued. Recent safety improvements include a comprehensive fire alarm system replacement in September 2023 ($32,860) to comply with current fire code requirements, followed by additional fire safety enhancements in October 2024, including new smoke detectors, heat detectors, and low-frequency sounders in living areas. The building underwent substantial maintenance and improvements in 2019, including repairs to damaged sheeting and stucco work, and has seen individual unit upgrades such as the complete remodel of Unit 205 in 2016 ($39,000) and Unit 102 in 2014, including modernized kitchens and bathrooms with new appliances and fixtures.

The building has experienced several safety-related issues requiring attention over the years, with the most recent being a series of violations documented in October 2023 regarding fire safety equipment and emergency preparedness, though these were marked as not active shortly thereafter. Historical violations from 2006-2009 included concerns about fire escapes, gas heaters, and security features, all of which were subsequently addressed. Fire safety has been an ongoing focus, with several fire complaints related to alarm systems and combustible materials being corrected promptly between 2006 and 2023. The property has maintained active compliance with building codes, as evidenced by the completion of major infrastructure improvements such as reroofing (2006), kitchen and bathroom remodels in multiple units, and various system upgrades including electrical, plumbing, and seismic improvements. While there have been multiple parking-related complaints in the vicinity of the building between 2020 and 2024, these are external issues not directly related to building management or conditions.

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

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Risk rating

How 121 Day 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
4thpercentile

Out of 1879 buildings in this neighborhood, 1804 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
36%
No DBI
violation
64%
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.

DBI tenant complaints (past 7 years)

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

12-Month risk forecast
High failure risk 64%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

121 Day St apartment reviews

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On the map

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8 found
The story over time

121 Day St event timeline

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

2025
Plumbing Permit May 30
Work category: 2pa; replace plumbing for one bathroo and one ktichen. rough in plumbing for toilet and sink. replace and relocate new drain, vents and water lines.
Complete
Electrical PermitMay 24
Unit 105 new sub panel kitchen outlets additional circuits and recessed lighting

See all 20 events

Full history back to 2019 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 121 Day St apartments

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

Side by side

How 121 Day St compares to the neighborhood

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