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246-248 27Th Ave

Lake Street, SF 94121 1386031 2 units · 2 fl · 1922

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 Lake Street
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 246-248 27Th Ave 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 1922
2 or more units
2 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
Units2
Floors2
Year built1922
Total area2,996 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1386031
Ownership

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

Owner name
Kamm John A & Henry Joy
Mailing address
246 27th Ave San Francisco CA 94121
Last sale
123120

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.

248 27th Ave, San Francisco, CA 94121
246 27th Ave, San Francisco, CA 94121
Augrented Insights
Initial analysis

The property at 246-248 27th Avenue is a two-unit, two-story multi-family residential building located in the Lake-The Presidio neighborhood. Built in 1922 and owned by Kamm John A & Henry Joy, this flats and duplex-style building has undergone several significant renovations and improvements over the years. Most recently, in 2023, the building received substantial exterior upgrades including the replacement of approximately 1,100 square feet of siding with James Hardie fiber cement siding and the installation of two new windows, all completed at a cost of $27,474. In 2022, the building underwent reroofing work costing $31,725. A notable event occurred in early 2021 when a building complaint was filed regarding unauthorized kitchen and bathroom remodeling work, though the issue was resolved by June 2021 through subsequent permitted renovations totaling $10,000 for new kitchen cabinets, tiling, and plumbing/electrical updates.

The building has a history of maintenance and improvements, including earlier window replacements in 2003 and 2004, and a significant ground floor interior remodel in 2012 that added a half bath and converted an existing room to storage, which involved comprehensive electrical and plumbing work. The property has experienced minimal tenant-related issues, with only three parking-related 311 calls recorded between 2018 and 2020, and one tenant buyout incident in 2015 for $10,000 involving one tenant at 248 27th Avenue. All recent improvements suggest ongoing maintenance and upgrading of the building's systems, with all recent permits properly obtained and completed, though there was one instance of unpermitted work in 2021 that was subsequently resolved through proper channels.

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

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Risk rating

How 246-248 27Th Ave'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
96th percentile

Out of 660 buildings in this neighborhood, 26 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
93%
No DBI
violation
7%
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.

DBI complaint rate, owner's portfolio

Per-building complaint rate across the owner's portfolio.

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 89.5%
Moderate concern 8.9%
Severe concern 1.6%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

246-248 27Th Ave apartment reviews

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The story over time

246-248 27Th Ave event timeline

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

2023
Building Permit Apr 05
Replace approx. 1100 sqft of existing siding with new in kind james hardie fiber cement artisan tongue and grove shiplap siding around the light well(not visible from the st.) . replace 2 windows w/new milgard whit etuscany vinyle same dimesion not visible from the st; max u-factor 0.30.
$27,474 · Complete

See all 6 events

Full history back to 2021 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 246-248 27Th Ave apartments

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

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

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