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3341-3347 18Th St

Inner Mission, SF 94110 3590065 10 units · 3 fl · 1907

This building has far more open problems than almost any other in the neighborhood. Renters here report frequent, slow-to-fix problems. Get repair promises in writing and check the unit before signing.

NOVs (7y) vs. neighborhood
Compared to a typical building in Inner Mission
Above average
avg 2.6
19
FewerMore

This building has 19 novs (7y), above the Inner Mission average of 2.6.

Rent & eviction protection

Is 3341-3347 18Th 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 1907
2 or more units
10 units
Property type
Multi-Family Residential
Zoning
RH3
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 1907
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 built1907
Total area8,304 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot3590065
Ownership

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

Mailing address
Steven C. Thrower 1 Bush St Ste 900 San Francisco CA 94104
Last sale
110216

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.

3345 18th St, San Francisco, CA 94110
3347 18th St, San Francisco, CA 94110
3343 18th St, San Francisco, CA 94110
3341 18th St, San Francisco, CA 94110
Augrented Insights
Initial analysis

The Inner Mission property at 3341-3347 18th Street is a three-story, 10-unit multi-family residential building constructed in 1907, currently owned by 3345 18th Street Ti LLC. The building underwent significant work in 2017, including major improvements to its fire safety systems, electrical infrastructure, and modifications to common areas and commercial spaces. These improvements included upgrading the fire alarm system, fire suppression system, and electrical systems, as well as constructing new trash room enclosures and stairways. The building is classified as a Tier 4 soft-story structure, and work has been completed with a Certificate of Final Completion issued.

Recent concerns have emerged regarding unauthorized modifications and maintenance issues. In August 2023, complaints were filed about potentially unpermitted plumbing work in both a residential unit and the basement restaurant (Balompie Cafe), with concerns about improper wastewater disposal. Additional recent issues include a fire alarm violation issued in January 2024, and a history of maintenance concerns from 2016-2017 that were subsequently addressed, including repairs to stairs, windows, and heating systems. The property has maintained active compliance with major systems through various upgrades, including multiple water heater installations, electrical system improvements, and fire safety enhancements over the years. Recent routine inspections in 2022-2023 have noted various maintenance issues in common areas, though most have been resolved. The building has experienced recurring fire safety system inspections, with occasional violations related to maintenance and operations, though these have generally been promptly addressed.

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

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Risk rating

How 3341-3347 18Th 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
1th percentile

Out of 2380 buildings in this neighborhood, 2356 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
12%
No DBI
violation
88%
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.

Building size

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

Number of units

The number of units affects how the model reads complaint and violation totals — more units means more potential sources.

DBI tenant complaints (past 7 years)

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

12-Month severity forecast
No violation 8.4%
Moderate concern 55.0%
Severe concern 36.6%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

3341-3347 18Th St apartment reviews

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The story over time

3341-3347 18Th St event timeline

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

2026
311 Request Jul 21
Not offensive
sidewalk structure
311 RequestJul 21
Not offensive

See all 27 events

Full history back to 2020 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 3341-3347 18Th St 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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