Free SF apartment background check

378 28Th St

Noe Valley, SF 94131 6602021 2 units · 2 fl · 1910

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 Noe Valley — not a forecast
At or below average
avg 1.2
0
FewerMore

This building has 0 novs (7y), at or below the Noe Valley average of 1.2.

Rent & eviction protection

Is 378 28Th 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
2 units
Property type
Multi-Family Residential
Zoning
RH2
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
Units2
Floors2
Year built1910
Total area2,490 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot6602021
Ownership

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

Mailing address
Raul S & Ruth Lai Tiansay, 378 28Th St San Francisco CA 94131
Last sale
May 20, 2002

Landlord portfolio

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

Unlock complete report
Augrented Insights
Initial analysis

The two-unit residential building at 378 28th Street in Noe Valley, owned by the Tiansay Family Revoc Trust, has undergone several significant renovations since its construction in 1910. The most recent major upgrade was the installation of a new fireplace gas appliance in 2022, replacing an existing one at a cost of $20,000. Between 2002 and 2010, substantial improvements were made to the property, including a proposed conversion of rental areas, ground floor additions, and extensive kitchen and bathroom remodels, with the electrical system receiving significant upgrades in 2003 through rewiring both units and installing new 200-amp service. However, there are some concerning recent maintenance issues; notably, there have been three sewer discharge incidents from the side sewer vent between November 2023 and December 2024, suggesting possible ongoing plumbing challenges. Additional infrastructure work included the installation of a new gas furnace in 2010, bathroom and kitchen remodeling, and new electrical wiring and fixtures. The property has experienced some environmental issues, with a tree reported in 2022 as damaging property by lifting sidewalk through root growth, though this remains an open case. The building's history includes a resolved case of illegal short-term rental activity, which was abated.

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 378 28Th 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
88thpercentile

Out of 1879 buildings in this neighborhood, 225 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
90%
No DBI
violation
10%
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.

Estimated permit spend (past 7 years)

Dollar value of permits pulled at this address — large recent spend can signal deferred-maintenance catch-up.

Building permits, owner's portfolio

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

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
Low failure risk 10%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

378 28Th 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

Loading reviews…

On the map

Compare nearby alternatives

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

The story over time

378 28Th St event timeline

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

2022
Building Permit Aug 11
Install new fireplace gas appliance to replace existing.
$20,000 · Complete
Plumbing PermitAug 04
Work category: 1m; install a direct vent gas fireplace per manual specs. gas line by others.

See all 2 events

Full history back to 2022 — violations, complaints, permits, buyouts, and fire incidents.

Unlock complete timeline
Every record we have

Full data for 378 28Th St apartments

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

Side by side

How 378 28Th St compares to the neighborhood

This building against comparable properties in Noe Valley. 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.

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
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

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

Watch 378 28Th St
Get alerted the moment a new violation or complaint is filed.