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637 Lake St

Lake Street, SF 94118 1367050 2 units · 2 fl · 1909

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 Lake Street — not a forecast
At or below average
avg 0.6
0
FewerMore

This building has 0 novs (7y), at or below the Lake Street average of 0.6.

Rent & eviction protection

Is 637 Lake 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 1909
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 1909
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 built1909
Total area3,390 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1367050
Ownership

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

Mailing address
Paula Siegel & Michael J Gi 258 Maynard St San Francisco CA 94112
Last sale
October 11, 2022

Landlord portfolio

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

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Augrented Insights
Initial analysis

The two-unit residential building at 637 Lake Street, located in the Lake-The Presidio neighborhood, is a 2-story flats and duplex structure built in 1909, currently owned by Paual Siegel Separte Proper. The property has undergone several significant maintenance activities over the years, including two complete reroofing projects - one in 1999 and a more recent $18,950 project in 2017 due to roof leaks. In 2009, important plumbing work was completed to replace the house trap under the sidewalk. The building has experienced some infrastructure challenges, including a sewer vent issue in October 2020 that was resolved by PUC Sewer Operations.

The property has faced periodic exterior maintenance challenges, particularly in 2020 when multiple incidents were reported, including a sewage vent issue, a fallen tree, and instances of offensive graffiti. Historical records indicate some recurring issues with sidewalk blockage, particularly in March-April 2017 involving a residential totter, though these were noted for referral to DPT enforcement. Two damaging tree incidents were recorded in 2014 and 2020, with the 2014 case being listed as a dead tree. The building's permit and violation history suggests regular maintenance but no major structural modifications or violations. The most recent significant event related to the address was a tenant buyout at the neighboring 639 Lake Street unit in July 2022, involving one tenant and a payment of $25,000.

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

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Risk rating

How 637 Lake 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
70thpercentile

Out of 660 buildings in this neighborhood, 198 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
87%
No DBI
violation
13%
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.

Construction spend, owner's portfolio

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

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.

12-Month risk forecast
Low failure risk 13%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

637 Lake St apartment reviews

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On the map

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8 found
The story over time

637 Lake St event timeline

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

2025
Electrical Permit Oct 02
#639 lake str - add new sub-panel, dining room - five to six 120v wall receptacles, center light on a switch, six recessed lights on a switch, living room - five to six 120v wall receptacles, center light on a switch, six recessed lights on a switch
Complete
Building PermitMay 16
Replace 700sqft siding on back of dwelling (not street visible) from (e) wood to (n) hardie plank lap siding, replace 11 windows and 2 doors not street visible, new windows will be vinyl, new doors, fiberglass. all are size for size

See all 2 events

Full history back to 2025 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 637 Lake St apartments

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

Side by side

How 637 Lake St compares to the neighborhood

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