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2633-2635 21St St

Inner Mission, SF 94110 4142039 3 units · 2 fl · 1904

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 2633-2635 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 1904
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 1904
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
Floors2
Year built1904
Total area2,992 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot4142039
Ownership

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

Mailing address
2633 21st St Apt 2 San Francisco CA 94110
Last sale
July 03, 2014

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.

2635 21st St, San Francisco, CA 94110
2633 21st St, San Francisco, CA 94110
Augrented Insights
Initial analysis

Located in the Inner Mission neighborhood, this two-story multi-family residential building at 2633-2635 21st Street was built in 1904 and contains three units. The property, currently owned by Valentina Cabrera Stagno, has undergone several significant improvements over the past two decades, with the most recent substantial renovations occurring between 2014-2015. These included comprehensive updates to Unit #2 featuring a new kitchen and bathroom, complete with plumbing and electrical upgrades totaling approximately $25,000, as well as modernizations to the upper unit including an on-demand water heater installation, new laundry facilities, and furnace work. Earlier improvements from 2001-2010 focused on Unit #2635, encompassing bathroom renovations, kitchen remodeling, stair repairs, and the addition of new spaces like a coat closet and office. The building's infrastructure has received consistent attention, including a complete reroofing in 2006 (cost: $26,000) and electrical system upgrades such as the installation of a 70-amp subpanel in 2015.

The property has maintained compliance with housing regulations, with routine inspections in 1999 and 2008 showing no outstanding issues. While there have been three documented incidents of driveway blocking in recent years (2020-2021), these were promptly addressed by parking enforcement and do not indicate any regular pattern of concern. The building's permit history demonstrates ongoing maintenance and improvements, with particular attention paid to modernizing individual units' systems including plumbing, electrical, and HVAC components. The most recent major works focused on Unit #2 in 2015, suggesting that subsequent years may have involved routine maintenance rather than substantial renovations.

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

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Risk rating

How 2633-2635 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
48thpercentile

Out of 2380 buildings in this neighborhood, 1238 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
62%
No DBI
violation
38%
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.

Property class: multi-family flat

2–4 unit flats (class F) are a common SF building type with their own maintenance and complaint patterns.

12-Month risk forecast
Moderate failure risk 38%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

2633-2635 21St St apartment reviews

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On the map

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Buildings nearby
8 found
The story over time

2633-2635 21St St event timeline

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

2025
311 Request Aug 11
Sewage back-up discharge
from side sewer vent

See all 1 events

Full history back to 2025 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 2633-2635 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 2633-2635 21St St compares to the neighborhood

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