Free SF apartment background check

25-27 Jansen St

Russian Hill, SF 94133 0074041 2 units · 2 fl · 1932

Nothing on record for this building in the last seven years, and our model puts it at a low risk of maintenance problems over the next 12 months. 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 Russian Hill — not a forecast
At or below average
avg 1.9
0
FewerMore

This building has 0 novs (7y), at or below the Russian Hill average of 1.9.

Rent & eviction protection

Is 25-27 Jansen 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 1932
2 or more units
2 units
Property type
Multi-Family Residential
Zoning
RM2
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 1932
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
Units2
Floors2
Year built1932
Total area2,068 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0074041
Ownership

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

Mailing address
Fong Thet Jung Trustee 27 Jansen St San Francisco CA 94133
Last sale
July 27, 2005

Landlord portfolio

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

Unlock complete report
Multiple entrances & addresses

Included addresses

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

25 Jansen St, San Francisco, CA 94133
27 Jansen St, San Francisco, CA 94133
Augrented Insights
Initial analysis

The two-unit, two-story multi-family residential building at 25-27 Jansen Street in Russian Hill, owned by Thet Jung Fong Survivor's Trust, has undergone several significant improvements since its construction in 1932. Major renovations included a complete roof replacement in 2002 costing $9,450, and a substantial exterior makeover in 1987 when the original stucco was replaced with new wood siding and moldings. More recently, in 2013, the building underwent plumbing work to repair the ground floor sewer line, which was properly completed and closed out.

The property has experienced recurring issues with abandoned vehicles and parking enforcement matters in the immediate vicinity, particularly between 2018 and 2024, with multiple reports of abandoned vehicles and driveway blocking incidents. Notable incidents include a citation issued for a blocking vehicle in October 2024, and three unsuccessful attempts to locate vehicles blocking driveways in 2023-2024. The building's surroundings have periodically required attention from city services, with reports of loose garbage prompting general cleaning operations in 2019-2020, and a successful encampment removal in November 2017. While these exterior maintenance and enforcement issues have been consistently addressed by city services, they primarily relate to public space management rather than the building's internal conditions or resident amenities.

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

Free account unlocks the full analysis — plus 2× more records across all data categories and the complete landlord portfolio.
Risk rating

How 25-27 Jansen 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
91stpercentile

Out of 1133 buildings in this neighborhood, 102 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
92%
No DBI
violation
8%
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.

Construction spend, owner's portfolio

Estimated permit value across all of this owner's buildings.

Building permits, owner's portfolio

Permits pulled across all of this owner's buildings over 7 years.

12-Month risk forecast
Low failure risk 8%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

25-27 Jansen St apartment reviews

Real experiences from people who have lived here. Share yours to help other renters decide.

Share your experience — Help other renters by leaving an honest apartment review

Create account

Loading reviews…

On the map

Compare nearby alternatives

This building and nearby alternatives, color-coded by risk level. Click any marker to explore.

Buildings nearby
8 found
The story over time

25-27 Jansen St event timeline

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

2025
311 Request Jan 26
Light
light flickering on off PGE - Streetlights

See all 3 events

Full history back to 2023 — violations, complaints, permits, buyouts, and fire incidents.

Unlock complete timeline
Every record we have

Full data for 25-27 Jansen St apartments

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

Side by side

How 25-27 Jansen St compares to the neighborhood

This building against comparable properties in Russian Hill. Toggle filters to narrow the peer group.

Loading comparables…
Still apartment hunting in SF?

Look up the next apartment before you sign

Search any SF address free — no account needed to see the risk rating.

Search another address Get full report
Simple pricing

Get the complete picture

Every plan unlocks the complete report: all 13 SF datasets, full history, landlord portfolio, and PDF & Excel exports.

Pay once

Report Bundle

For the buildings you're deciding on right now

$10one time

3premium reports

$3.33 per report · charged once, never renews

Each credit unlocks one building's premium report for 30 days.

  • 3 premium reports — AI executive summary included
  • Live data across all 27 public record types
  • 200 records per dataset
  • PDF & Excel exports included
  • Compare up to 10 buildings side-by-side
  • Credits never expire until you use them
Buy 3 Reports — $10
Pay once

Apartment Hunter

For a wide search across many buildings

$39one time

30premium reports

$1.30 per report · charged once, never renews

Each credit unlocks one building's premium report for 30 days.

  • 30 premium reports — AI executive summary included
  • Live data across all 27 public record types
  • 200 records per dataset
  • PDF & Excel exports included
  • Compare up to 10 buildings side-by-side
  • Credits never expire until you use them
Buy 30 Reports — $39
Most Popular Current plan
Subscription

Renter

For the weeks when the stakes are highest

$8.33/mo

5premium reports / mo

Billed $100/year — save $44 vs monthly

Renews automatically until you cancel.

  • Unlimited standard reports — 50 records per dataset
  • 5 premium AI reports per month — live data, 200 records per dataset, all 27 record types
  • PDF & Excel exports on every report
  • Compare up to 10 buildings side-by-side
  • Full event timeline — every year of history
  • Landlord portfolio & ownership insights
Start Your Search

Less than $0.28/day. Cancel anytime.

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

Watch 25-27 Jansen St
Get alerted the moment a new violation or complaint is filed.