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2824-2828 21St St

Inner Mission, SF 94110 4085018 3 units · 4 fl · 1910

Nothing on record for this building in the last seven years. Our model still sees a moderate chance of maintenance problems in the next 12 months, from the owner's wider portfolio and the surrounding area rather than from anything recorded here. No public enforcement record to go on. Walk the building, ask the current tenants how repairs get handled, and get any promises in writing.

NOVs (7y) vs. neighborhood
Records already on file, against a typical building in Inner Mission — not a forecast
At or below average
avg 2.7
0
FewerMore

This building has 0 novs (7y), at or below the Inner Mission average of 2.7.

Rent & eviction protection

Is 2824-2828 21St 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 1910
2 or more units
3 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 1910
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
Units3
Floors4
Year built1910
Total area5,000 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot4085018
Ownership

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

Mailing address
Sofer Mikhal Ttee 2828 21St St San Francisco CA 94110
Last sale
November 09, 2017

Landlord portfolio

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

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Multiple entrances & addresses

Included addresses

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

2828 21st St, San Francisco, CA 94110
2824 21st St, San Francisco, CA 94110
2826 21st St, San Francisco, CA 94110
Augrented Insights
Initial analysis

The three-unit multi-family residential building at 2824-2828 21st Street in San Francisco's Inner Mission neighborhood was constructed in 1910 and has undergone significant improvements over the past few years under the ownership of Mikhal Sofer 2017 Trust. Between 2018 and 2020, the property received substantial upgrades including the installation of a comprehensive fire sprinkler system throughout the basement and first floor ($19,494), a sprinkler monitoring system ($5,000), and a complete electrical service upgrade with new fixtures and safety features ($19,494). The building underwent significant interior improvements including kitchen and bathroom remodels in all three units, installation of new gas furnaces ($4,000), and gas meter relocation with protective cabinets ($4,000).

The property has a documented history of maintenance issues from early 2016, including complaints about inadequate heating, mold and mildew, plumbing problems, and window repairs. These violations were officially abated in June 2016. More recent maintenance work includes garage door replacements ($2,500) in 2020 and various interior and exterior improvements. Planning records indicate approved projects for a roof deck addition, lightwell modifications, and basement garage improvements, demonstrating ongoing investment in the property's infrastructure and safety systems. The building has consistently addressed safety and compliance requirements, including a 2018 building fire investigation that resulted in no civilian injuries, though the ignition cause was undetermined. Recent 311 calls primarily relate to parking enforcement and street cleaning issues rather than building-specific concerns, suggesting improved property management and maintenance standards in recent years.

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

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Risk rating

How 2824-2828 21St 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
56thpercentile

Out of 2380 buildings in this neighborhood, 1047 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
67%
No DBI
violation
33%
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.

Neighborhood location

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

Building size

Total floor area — a proxy for building scale and the number of systems (plumbing, electrical, HVAC) that can fail.

12-Month risk forecast
Moderate failure risk 33%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

2824-2828 21St St apartment reviews

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The story over time

2824-2828 21St St event timeline

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

2025
311 Request Nov 17
Sidewalk defect
lifted sidewalk other
311 RequestOct 31
Blocking driveway cite tow

See all 6 events

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

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Every record we have

Full data for 2824-2828 21St St apartments

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

Side by side

How 2824-2828 21St St compares to the neighborhood

This building against comparable properties in Inner Mission. Toggle filters to narrow the peer group.

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Cancel anytime · Data sourced from SF Open Data, DBI, SFFD, SF Rent Board & Planning

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