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56 Mars St

Corona Heights, SF 94114 2654009 2 units · 2 fl · 1900

A handful of records on file over the last seven years, and our model puts this building at a low risk of further maintenance problems in the next 12 months. A few records worth reading before you sign. Check whether they were closed out, and ask what was actually fixed.

NOVs (7y) vs. neighborhood
Records already on file, against a typical building in Corona Heights — not a forecast
At or below average
avg 1.3
0
FewerMore

This building has 0 novs (7y), at or below the Corona Heights average of 1.3.

Rent & eviction protection

Is 56 Mars 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
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 1900
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 built1900
Total area1,850 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot2654009
Ownership

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

Owner name
Mailing address
56 Mars St San Francisco CA 94114
Last sale
October 03, 2012

Landlord portfolio

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

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Multiple entrances & addresses

Included addresses

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

56 Mars St, San Francisco, CA 94114
56 A Mars St, San Francisco, CA 94114
Augrented Insights
Initial analysis

56 Mars Street is a two-unit, two-story multi-family residential building located in Corona Heights and owned by Mars Place LLC. Built in 1900, this flats and duplex structure has undergone several significant renovations, with the most recent being a proposed horizontal addition of 670 square feet above both units, particularly affecting 56A, which would increase its living space from 475 to 1,135 square feet. This addition, with an estimated cost of $367,835, was issued a permit in May 2022 and appears to be the most substantial current improvement project.

The building underwent major improvements in 2010, including extensive foundation work, lower-level modifications, and comprehensive updates to both units' kitchens and bathrooms, with associated electrical and plumbing upgrades totaling over $100,000. These renovations were initially the subject of a complaint in January 2010 regarding lack of proper inspections, though this violation was abated by April 2010. The property has maintained compliance with building codes since then, with subsequent improvements including electrical rewiring, plumbing upgrades including new bathrooms and kitchens, and a central heating system installation. Recent maintenance issues have mostly been external to the building itself, including some 311 calls regarding parking violations and street conditions between 2013 and 2024. Notably, there were two sewage backup incidents recorded in 2015, though these were resolved as per the PUC Sewer Operations records. The building appears to be well-maintained, with most recent issues being routine municipal concerns rather than building-specific problems.

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

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Risk rating

How 56 Mars 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
93rdpercentile

Out of 348 buildings in this neighborhood, 24 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
92%
No DBI
violation
8%
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.

Building age

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

Property class: multi-family flat

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

Neighborhood location

Precise location is a proxy for neighborhood-level risk — some SF blocks have systematically higher DBI activity.

12-Month risk forecast
Low failure risk 8%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

56 Mars St apartment reviews

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On the map

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8 found
The story over time

56 Mars St event timeline

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

2026
Plumbing Permit Apr 29
Install radiant heating tubing in the addition area (670 sq ft)
Complete
Electrical PermitMar 20
Rewire of entire home. 4 bedrooms, 2 kitchens, 2 living rooms, 2 dinning rooms, 4 bathrooms. and new subpanel and feeder

See all 10 events

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

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Every record we have

Full data for 56 Mars St apartments

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

Side by side

How 56 Mars St compares to the neighborhood

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