Free SF apartment background check

3356-3358 21St St

Eureka Valley/Dolores Heights, SF 94110 3608019 2 units · 2 fl · 1900

This building has significantly more problems than most nearby buildings. A handful of unresolved issues. Worth a careful walk-through and pointed questions.

NOVs (7y) vs. neighborhood

Compared to a typical building in Eureka Valley/Dolores Heights

Above average

avg 1.3

12

FewerMore

This building has 12 novs (7y), above the Eureka Valley/Dolores Heights average of 1.3.

12-Month Maintenance Forecast

53%

(risk — lower is better)

Some concerns

Estimated probability of a DBI violation or complaint in the next 12 months.

7-YEAR TREND Violations + complaints / yr

'20

'21

'22

'23

'24

'25

'26

'27*

*Next year, projected from recent activity and predicted risk.

7-Year Historical Counts

12

NOVs (7y)

3

DBI Complaints (7y)

5

311 Calls (7y)

0

Fire Incidents

0

2nd NOVs

1

Dir. Hearings

0

City Atty

3

Permits (7y)

Unlock complete report Compare another building

Rent & eviction protection

Is 3356-3358 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 1900

2 or more units

2 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.

Building characteristics

Units	2
Floors	2
Year built	1900
Total area	3,640 sq ft
Property type	Multi-Family Residential
Tax status	None
Blocklot	3608019

Ownership

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

Owner name

Dang Shirley

Mailing address

1839 39th Ave San Francisco CA 94122

Last sale

000000

Landlord portfolio

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

Unlock complete report

Multiple entrances & addresses

Included addresses

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

3358 21st St, San Francisco, CA 94110

3356 21st St, San Francisco, CA 94110

Augrented Insights

Initial analysis

The property at 3356-3358 21st Street is a two-unit, two-story multi-family residential building located in the Eureka Valley/Dolores Heights neighborhood, constructed in 1900. The building has experienced recurring maintenance issues, particularly with the rear stairs, which have required multiple repairs over the years (2003, 2012, and most recently in 2024). A significant recent concern is the documented mold problem reported in January 2023, which was noted as affecting every room in the house and had not been adequately addressed after tenant notification. More recent permits indicate ongoing maintenance work, including a basement ceiling repair, window glass replacement, and stair repairs totaling $29,000 in 2024, as well as a completed reroofing project in 2023 costing $18,000.

The building has a history of various violations and complaints, particularly between 2002-2003, when multiple fire safety and maintenance issues were documented, including problems with the fire escape, stairs, drainage pipes, and combustible storage. These violations were ultimately abated by March 2003. More recent concerns include a July 2024 complaint about an unsafe back porch and an active general maintenance complaint from February 2024. The property has undergone several infrastructure improvements, including an underground electrical service conversion in 2004 and various repairs to address building code compliance issues. Historical maintenance records show regular upkeep, including re-roofing work, stair repairs, and window replacements, though some past complaints about sanitation issues and graffiti have been recorded through 311 calls. The current ownership under Shirley Dang has maintained the property through various repairs and improvements, with recent focus on addressing water damage and fire safety concerns.

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

Risk rating

How 3356-3358 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

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

13th percentile

Out of 1278 buildings in this neighborhood, 1112 are predicted to be safer.

RiskiestSafest

Predicted 12-month outcome

47%

No DBI
violation

53%

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.

DBI tenant complaints (past 7 years)

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

NOV rate, owner's portfolio

Per-building NOV rate across everything this owner manages — high rates signal pattern neglect.

Building age

Older buildings tend to have more maintenance challenges; SF's pre-1906 earthquake housing stock carries distinct risk.

12-Month severity forecast

No violation 38.7%

Moderate concern 34.3%

Severe concern 27.0%

Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.

Apartment reviews

3356-3358 21St 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

Loading…

The story over time

3356-3358 21St St event timeline

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

2026

311 Request Feb 20

Garbage and debris

human waste or urine

Electrical PermitJan 02

Change address from 3358 21st st to 3356 21st st. in ref to ew202512151521

See all 16 events

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

Unlock complete timeline

Every record we have

Full data for 3356-3358 21St St apartments

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

What this is

Permits issued by the SF Department of Building Inspection for new construction, alterations, and repairs. Includes estimated cost and current permit status.

Permit #	Description	Cost	Filed	Status
Loading…

What this is

Plumbing permit applications filed with the SF Department of Building Inspection. Covers plumbing installation, repair, and replacement work.

Permit #	Description	Filed	Status
Loading…

What this is

Electrical permit applications filed with the SF Department of Building Inspection. Covers electrical wiring, panel upgrades, and related work.

Permit #	Description	Filed	Status
Loading…

What this is

Notices of Violation issued by the SF Department of Building Inspection for code violations. Unresolved notices can escalate to legal action.

Date Filed	Complaint #	Description	Item	Category	Status
Loading…

What this is

Complaints filed with the SF Department of Building Inspection about code violations. Tracks the complaint lifecycle from filing through abatement or referral.

Complaint #	Date Filed	Date Abated	Division	Status	Description
Loading…

What this is

Planning Department project entitlements — discretionary review, conditional use, variances, and environmental review for this parcel.

Address	Opened	Closed	Status	Description	Applicant
Loading…

What this is

Planning Department administrative and compliance records that are not full project entitlements — pre-application meetings, code violations, and referrals.

Address	Opened	Closed	Status	Description	Applicant
Loading…

What this is

SFFD fire incidents geo-joined to this parcel. Covers structure fires, alarms, and emergency responses with injury and fatality counts.

Date	Situation	Civilian Injuries	Civilian Fatalities
Loading…

What this is

Fire code violations issued by the SFFD. Tracks corrective actions required and resolution status for fire safety code enforcement.

Violation Date	Description	Corrective Action	Status	Close Date
Loading…

What this is

Fire code complaints received by the SF Fire Department geo-joined to this parcel. Includes complaint type, disposition, and outcome.

Received	Description	Disposition Date	Disposition
Loading…

What this is

SF 311 service requests geo-joined to this parcel. Includes maintenance complaints, street/sidewalk issues, and quality-of-life requests.

Opened	Type	Agency	Category	Details	Status
Loading…

What this is

Buildings subject to SF's mandatory soft-story seismic retrofit program. Unreinforced multi-story wood-frame buildings must meet compliance tiers.

Tier	Status
Loading…

What this is

Tenant buyout (Ellis Act pre-cursor) agreements recorded with the SF Rent Board. Tracks amounts paid to tenants to vacate rent-controlled units.

Disclosure Date	Buyout Date	Amount	Tenants
Loading…

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.

Report Bundle

For the buildings you're deciding on right now

$10 one-time

~$3.33 per building. No subscription ever. Each credit unlocks one building's premium report for 30 days.

3 full AI-powered reports
Download PDF reports
Advanced safety analysis
Compare multiple buildings
Credits never expire until you use them
Full public records (200 rows per dataset)

Buy 3 Reports — $10

Apartment Hunter

For a wide search across many buildings

$39 one-time

30 reports — ~$1.30 each. No subscription ever.

30 full AI-powered reports
Download PDF reports
Advanced safety analysis
Compare multiple buildings
Credits never expire until you use them
Full public records (200 rows per dataset)

Buy 30 Reports — $39

Renter

For the weeks when the stakes are highest

$10/mo

Billed $120/year — save $24 vs monthly

Unlimited basic reports
5 premium AI reports per month
Download PDF & Excel reports
Full public records (200 rows per dataset)
Full event timeline — every year of history
Landlord portfolio & ownership insights

Start Your Search

Less than $0.34/day. Cancel anytime.

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