Free SF apartment background check

441-451 Walnut St

Presidio Heights, SF 94118 1020005 6 units · 3 fl · 1903

This building has a higher-than-average number of open problems nearby. Few open issues; problems get fixed quickly. A reasonable bet for a smooth tenancy.

NOVs (7y) vs. neighborhood
Compared to a typical building in Presidio Heights
At or below average
avg 1.2
0
FewerMore

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

Rent & eviction protection

Is 441-451 Walnut 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 1903
2 or more units
6 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.

Building characteristics
Units6
Floors3
Year built1903
Total area3,390 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1020005
Ownership

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

Owner name
Walnut Street Llc
Mailing address
521 Iris Ln San Ramon CA 94583
Last sale
010899

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.

451 Walnut St, San Francisco, CA 94118
443 Walnut St, San Francisco, CA 94118
445 Walnut St, San Francisco, CA 94118
441 Walnut St, San Francisco, CA 94118
447 Walnut St, San Francisco, CA 94118
449 Walnut St, San Francisco, CA 94118
Augrented Insights
Initial analysis

The three-story multi-family residential building at 441-451 Walnut Street in Presidio Heights is a 6-unit flats structure built in 1903 and currently owned by Walnut Street LLC. The property has undergone several significant improvements over the years, most notably completing a mandatory $40,000 soft-story retrofit in 2017 to enhance seismic safety, for which it received its Certificate of Final Completion (CFC). Historical records show earlier maintenance issues were addressed, including termite repairs on rear stairs in 1996, and various renovations in 1988 involving kitchen, bathroom, and fixture replacements in units 1 and 2.

The building has experienced two routine housing inspections by Housing Inspection Services, one in 2004 and another in 2007, which revealed several safety concerns that were subsequently addressed. The 2004 inspection highlighted issues with fire safety equipment, emergency exits, smoke detectors, and wooden stairs, while the 2007 inspection noted concerns about fire safety equipment and smoke detectors. Since then, there have been no recorded housing violations related to these critical systems. More recently, in 2021-2022, there were three street-related incidents near the property involving human/animal waste and medical waste, though these were external issues not directly related to the building's condition. The property appears to be current with its major safety requirements, having completed the essential soft-story retrofit and addressed past violations through documented abatement actions.

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 441-451 Walnut 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
50th percentile

Out of 181 buildings in this neighborhood, 90 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
75%
No DBI
violation
25%
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.

Number of units

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

Estimated permit spend (past 7 years)

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

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 59.1%
Moderate concern 23.9%
Severe concern 17.1%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

441-451 Walnut 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.

Buildings nearby
Loading…
The story over time

441-451 Walnut St event timeline

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

No dated public records on file yet.
Every record we have

Full data for 441-451 Walnut St apartments

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

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.

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

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

Watch 441-451 Walnut St
Get alerted the moment a new violation or complaint is filed.