Free SF apartment background check

829-831 Oak St

Hayes Valley, SF 94117 0844031 4 units · 2 fl · 1900

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 Hayes Valley
At or below average
avg 2.3
0
FewerMore

This building has 0 novs (7y), at or below the Hayes Valley average of 2.3.

Rent & eviction protection

Is 829-831 Oak 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
4 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
Units4
Floors2
Year built1900
Total area4,657 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot0844031
Ownership

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

Owner name
Walling Timothy T & Lapidus
Mailing address
829 Oak St San Francisco CA 94117
Last sale
032321

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.

829 A Oak St, San Francisco, CA 94117
831 Oak St, San Francisco, CA 94117
829 B Oak St, San Francisco, CA 94117
829 Oak St, San Francisco, CA 94117
Augrented Insights
Initial analysis

The 4-unit residential building at 829-831 Oak Street in Hayes Valley, owned by Timothy T. Walling and Lapidus, has undergone significant improvements and maintenance work in recent years. In 2018-2019, substantial safety upgrades were completed including the installation of a new NFPA 13 fire sprinkler system, control panel with monitoring capabilities, and comprehensive garage safety improvements. The building received major infrastructure improvements, including a new 200-amp service with multiple sub-panels, new furnaces for each apartment, and extensive plumbing upgrades including the addition of 11 bathrooms, 4 kitchens, and new water heaters. More recently, in June 2024, a reroofing project was completed at a cost of $29,380.

The building has experienced some construction-related disturbances, with complaints in 2018-2019 regarding after-hours construction work and noise from power tools, though these issues appear to have been addressed. There were also two fire-related complaints in 2018-2019 regarding combustible materials and sprinkler systems, both of which were promptly corrected. The property has undergone routine housing inspections in 2000, 2007, and 2011, and has been actively managed since then. Recent 311 calls from 2020-2023 have primarily concerned street cleaning issues and one parking violation, indicating typical urban maintenance matters in the surrounding area. A recent planning record from 2023 shows completed interior remodeling work including window replacements and garage door improvements, indicating ongoing property maintenance and upgrades.

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

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Risk rating

How 829-831 Oak 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
41th percentile

Out of 1027 buildings in this neighborhood, 606 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
62%
No DBI
violation
38%
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.

Building age

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

Estimated permit spend (past 7 years)

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

12-Month severity forecast
No violation 49.6%
Moderate concern 19.3%
Severe concern 31.1%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

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The story over time

829-831 Oak St event timeline

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

2025
Plumbing Permit Jul 17
Work category: 2pb; replace sewer lateral from inside basement at foundation to the sidewalk curb via trenchless pipe bursting
Complete
Plumbing PermitJun 18
Work category: 2pb; trench drain installation: install trench drain at bottom of driveway. tie into main sewer drain including backflow preventer

See all 6 events

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

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Every record we have

Full data for 829-831 Oak 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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