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4086-4088 26Th St

Noe Valley, SF 94131 6553020 2 units · 2 fl · 1890

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 Noe Valley
At or below average
avg 1.2
0
FewerMore

This building has 0 novs (7y), at or below the Noe Valley average of 1.2.

Rent & eviction protection

Is 4086-4088 26Th 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 1890
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.

Building characteristics
Units2
Floors2
Year built1890
Total area2,350 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot6553020
Ownership

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

Owner name
Patterson Marlies
Mailing address
1426 Shrader St San Francisco CA 94117
Last sale
061216

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.

4088 26th St, San Francisco, CA 94131
4086 26th St, San Francisco, CA 94131
Augrented Insights
Initial analysis

The two-unit, two-story multi-family residential building at 4086-4088 26th Street in Noe Valley, owned by Marlies Patterson, was constructed in 1890 and has undergone several significant improvements over the past few decades. Recent work includes foundation stabilization in 2018 through voluntary underpinning ($3,506) and multiple window replacements in 2017 involving both two and five window installations with energy-efficient Renewal by Anderson double-hung windows ($15,540 total). A complete reroofing project was carried out in October 2017 at a cost of $13,500. The property has a documented history of termite-related repairs, with the most recent being from a 2004 report that was completed at a cost of $9,500, and has undergone window improvements in the late 1980s including sash replacements and installation of wooden windows.

Recent activity at the property has primarily involved parking-related issues, with multiple reports of sidewalk parking and one driveway blockage between December 2023 and October 2024. There have been several enforcement actions taken, including citations issued for parked vehicles. Other incidents have included construction noise in August 2023 and a garbage overflow issue in January 2023, both of which were resolved. The building's maintenance record shows regular upkeep of essential systems, with three major roof work projects completed between 1985 and 2017, and proactive window upgrades to improve energy efficiency and bedroom egress compliance. While the property has experienced some maintenance issues typical of its age, such as termite infestations, these appear to have been addressed through appropriate remediation measures. The most significant recent structural work, the foundation stabilization in 2018, indicates ongoing investment in the building's structural integrity.

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

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Risk rating

How 4086-4088 26Th 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
92th percentile

Out of 1879 buildings in this neighborhood, 150 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
91%
No DBI
violation
9%
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 permits, owner's portfolio

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

Estimated permit spend (past 7 years)

Dollar value of permits pulled at this address — large recent spend can signal deferred-maintenance catch-up.

Construction spend, owner's portfolio

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

12-Month severity forecast
No violation 89.2%
Moderate concern 8.5%
Severe concern 2.3%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

4086-4088 26Th St apartment reviews

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The story over time

4086-4088 26Th St event timeline

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

2025
311 Request Sep 23
Garbage and debris
furniture
311 RequestFeb 03
No parking

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 4086-4088 26Th St apartments

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

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