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1724-1730 Mason St

North Beach, SF 94133 0118027 4 units · 2 fl · 1907

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 Beach
At or below average
avg 2.1
0
FewerMore

This building has 0 novs (7y), at or below the North Beach average of 2.1.

Rent & eviction protection

Is 1724-1730 Mason 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 1907
2 or more units
4 units
Property type
Multi-Family Residential
Zoning
RM2
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
Units4
Floors2
Year built1907
Total area4,300 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0118027
Ownership

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

Owner name
Sik Yuen Ng Separate Proper
Mailing address
Ng Sik Yuen Ttee 1724 Mason St San Francisco CA 94133
Last sale
120718

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.

1728 Mason St, San Francisco, CA 94133
1726 Mason St, San Francisco, CA 94133
1730 Mason St, San Francisco, CA 94133
1724 Mason St, San Francisco, CA 94133
Augrented Insights
Initial analysis

The 4-unit, 2-story multi-family residential building at 1724-1730 Mason Street in North Beach, dating back to 1907, has experienced recurring maintenance issues, particularly with its rear stairs and water damage, over the past few decades. Most recent building history includes a 2019 street space permit, and a 2015 routine safety inspection that revealed several compliance issues requiring attention, including the need for carbon monoxide alarms, fire extinguishers, and repairs to wood stairs. The building has undergone multiple stair repairs and replacements, with significant work done in 2015, 2006, 2004, and 1995 addressing dry rot and safety concerns. Water damage has been documented through various repairs, including bedroom area work in 2006 involving roof joists, siding, and flooring. A notable incident occurred in 2009 involving a precarious 40-foot clothesline structure that raised safety concerns and required removal by early 2010.

The building has faced various regulatory requirements and violations, including necessary fire safety improvements and structural maintenance. Historical records show multiple routine safety inspections across different years (1999, 2004, 2007, 2015) each revealing various maintenance and safety compliance issues that were subsequently addressed. Two planning records from the past indicate basement remodeling work, with one listed under developer Michael Alexander. The property has had minimal external issues, with only one 311 call recorded in 2018 regarding an abandoned vehicle, which was resolved when the vehicle was no longer present.

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

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Risk rating

How 1724-1730 Mason 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
59th percentile

Out of 362 buildings in this neighborhood, 148 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
79%
No DBI
violation
21%
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.

Neighborhood (ZIP code)

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

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 53.2%
Moderate concern 16.5%
Severe concern 30.3%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
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The story over time

1724-1730 Mason St event timeline

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

2019
Building Permit Sep 17
Street space
Issued

See all 1 events

Full history back to 2019 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 1724-1730 Mason St 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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