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4024-4026 18Th St

Eureka Valley/Dolores Heights, SF 94114 3582020 2 units · 4 fl · 1900

Nothing on record for this building in the last seven years, and our model puts it at a low risk of maintenance problems over the next 12 months. No public enforcement record to go on. Walk the building, ask the current tenants how repairs get handled, and get any promises in writing.

NOVs (7y) vs. neighborhood
Records already on file, against a typical building in Eureka Valley/Dolores Heights — not a forecast
At or below average
avg 1.4
0
FewerMore

This building has 0 novs (7y), at or below the Eureka Valley/Dolores Heights average of 1.4.

Rent & eviction protection

Is 4024-4026 18Th 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
RH3
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
Floors4
Year built1900
Total area3,188 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot3582020
Ownership

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

Mailing address
Vanderheyden Paul John, Tte 1821 Tiburon Way San Luis Obispo CA 93401
Last sale
July 17, 2020

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.

4024 18th St, San Francisco, CA 94114
4026 18th St, San Francisco, CA 94114
Augrented Insights
Initial analysis

The property at 4024-4026 18th Street is a two-unit, two-story multi-family residential building located in the Eureka Valley/Dolores Heights neighborhood. Built in 1900, this flats and duplex structure has undergone significant improvements over the past several years, with the most substantial work occurring between 2017-2020. A major vertical addition and complete interior remodel was completed in 2017, costing $670,000, followed by comprehensive updates including foundation replacement ($50,000), installation of an automatic fire sprinkler system, complete rewiring, plumbing upgrades, and new heating systems with two 150k BTU boilers and 50-gallon indirect tanks in 2019. The building's safety and modernization work appears thorough, with fire safety improvements including sprinklers and fire alarms being properly permitted and completed.

The property has an important historical context regarding safety concerns, particularly during 2006-2013 when there were serious violations related to unstable decks and rotted stairs, which were documented as "unsafe for use." These issues were not abated until May 2013, indicating a significant period of safety concerns prior to the recent extensive renovations. Since the major improvements were completed, there have been no building violations or complaints recorded against the property. Recent activity at the address (2024) has primarily involved routine municipal services such as street cleaning and parking enforcement, though there were multiple reports of garbage and debris issues in mid-2024, which were all promptly resolved. All building permits and inspections related to the major improvements have been properly completed, suggesting that the building is currently in good standing with local building codes and safety requirements.

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

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Risk rating

How 4024-4026 18Th 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
89thpercentile

Out of 1278 buildings in this neighborhood, 141 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
89%
No DBI
violation
11%
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.

Number of floors

Building height affects maintenance complexity and is one of the size signals the model uses.

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 11%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

4024-4026 18Th St apartment reviews

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On the map

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Buildings nearby
8 found
The story over time

4024-4026 18Th St event timeline

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

2025
311 Request Jun 17
Parking on sidewalk
Parking Enforcement
311 RequestJun 11
Garbage and debris

See all 11 events

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

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Every record we have

Full data for 4024-4026 18Th St apartments

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

Side by side

How 4024-4026 18Th St compares to the neighborhood

This building against comparable properties in Eureka Valley/Dolores Heights. Toggle filters to narrow the peer group.

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