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805-809 Lyon St

North Panhandle, SF 94115 1150007 3 units · 2 fl · 1913

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 North Panhandle
At or below average
avg 1.7
0
FewerMore

This building has 0 novs (7y), at or below the North Panhandle average of 1.7.

Rent & eviction protection

Is 805-809 Lyon 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 1913
2 or more units
3 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
Units3
Floors2
Year built1913
Total area3,300 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot1150007
Ownership

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

Owner name
Mansfield Deborah Irene
Mailing address
809 Lyon St San Francisco CA 94115
Last sale
112916

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.

807 Lyon St, San Francisco, CA 94115
809 Lyon St, San Francisco, CA 94115
805 Lyon St, San Francisco, CA 94115
Augrented Insights
Initial analysis

The property at 805-809 Lyon Street is a two-story, three-unit multi-family residential building constructed in 1913, currently owned by Deborah Irene Mansfield. The building underwent significant improvements between 2012 and 2023, including the legalization of a third unit in 2012-2013 after addressing a violation of illegal occupancy, which involved installing a new fire sprinkler system and updating various utilities. Recent improvements include a comprehensive solar power system installation in late 2022 and early 2024 consisting of multiple solar panels, microinverters, and Tesla Powerwall equipment (totaling 17.1 kW DC size and associated electrical upgrades), demonstrating investment in sustainable energy infrastructure.

The building has received substantial maintenance and upgrades over the years, including a complete re-roofing in 2014, installation of vinyl siding in 2015, and various plumbing improvements including replacement of sewage lateral and installation of new water services. Several 311 calls related to the property were recorded between 2018 and 2025, primarily concerning external issues such as tree maintenance, graffiti, and parking violations, though none directly related to building safety or habitability concerns. The property's electrical and plumbing systems have been regularly updated to meet current codes, with the most recent permits indicating continued maintenance and improvements to both systems.

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

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Risk rating

How 805-809 Lyon 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
66th percentile

Out of 797 buildings in this neighborhood, 271 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
81%
No DBI
violation
19%
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 (ZIP code)

The ZIP code captures local housing market and enforcement patterns that affect all buildings in the area.

Building permits, owner's portfolio

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

Property class: multi-family flat

2–4 unit flats (class F) are a common SF building type with their own maintenance and complaint patterns.

12-Month severity forecast
No violation 74.4%
Moderate concern 18.5%
Severe concern 7.1%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

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The story over time

805-809 Lyon St event timeline

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

2024
Electrical Permit Jan 18
Roo-mounted solar 22 modules,8.58 kw dc size,6 micro-inverter,1x tesla powerwall,backup gateway,30a ac disconnect,125a pv sub panel,125 service sub panel.
Complete

See all 3 events

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

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Every record we have

Full data for 805-809 Lyon St apartments

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

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