1821 Cabrillo St

San Francisco · Outer Richmond · Block/lot 1662/043 · San Francisco

Property brief (PDF)Timeline ↓Calculator ↓Official records ↓

What's changing nearby

Since October 2024 within ½ mile: 20 homes completed, 8 permitted, 90 proposed or in review.

28 projects with a record in this window, grouped by us from permits and State housing reports. Units are as proposed on each project's latest record and counted at its current stage.

752 permits within ½ mile since October 2024

New construction2 · 84 units
Adds housing (ADU)9 · 10 units
Demolition2
Additions & renovations244
Building systems367
Repairs29
Other99

The map shows new construction, ADUs, demolitions, additions, and renovations. Routine systems work (roofs, HVAC, water heaters) is counted but not mapped. Unit counts are as stated on permits.

Explore projects on the map →Explore sales & prices →

Source: San Francisco Department of Building Inspection, Building Permits · Geography: permits located by parcel, ½ mile radius · Retrieved Oct 31, 2026

Estimated price, listing status & sales records

Benchmark valuation & transaction history

Estimated PriceArea benchmark

$1,611,000

Benchmark range: $1,369,000 – $1,853,000

Listing StatusOff Market

Not currently listed for sale

Compare nearby sales & prices on map →

Last Sold & Tax Roll

No deed price in open GIS feed

Verify on Property Information Map

How this estimated price is calculated (Area ZHVI + ACS + Permit Benchmark)

Model monthly ownership cost ↓

1. Area home value baseline: Outer Richmond Census ACS 5-year median home value ($1,582,150); $1,582,150
2. Parcel & lot adjustment (1.00×): Standard residential parcel (1.00× area baseline); +$0
3. Documented permitted improvements: +$28,500 from documented permits (1 addition); +$28,500

Public-records benchmark estimate combining Zillow Home Value Index (Data provided by Zillow), Census ACS 5-year estimates, parcel land-use/lot characteristics, and issued building permits. Not an official appraisal.

What could be built here

A screen, not a determination

ADU or junior ADU

Likely eligible

Zoned RH-2 (two-family residential): state law allows ADUs where homes are allowed.

What we couldn't check (4)

Setbacks, height and size limits in the local ADU ordinance
Utility and sewer capacity, fire access
Historic district or landmark status: we have no historic layer for this area yet.
Locally adopted fire hazard maps, which can be broader than the State's.

SB 9: two homes on the lot

Unlikely

Zoned RH-2 (two-family residential), not a single-family residential zone.

What we couldn't check (6)

Whether a tenant lived there in the last 3 years, or the building was withdrawn from rent under the Ellis Act
Rent-controlled or deed-restricted affordable housing on the lot
Wetlands, habitat, farmland, hazardous waste sites and conservation easements
Local SB 9 standards (size, setbacks, parking)
Historic district or landmark status: we have no historic layer for this area yet.
Locally adopted fire hazard maps, which can be broader than the State's.

SB 9: split into two lots

Unlikely

Zoned RH-2 (two-family residential), not a single-family residential zone.

What we couldn't check (6)

Owner-occupancy: the applicant must sign an affidavit to live in one of the homes for 3 years
Whether the lot was created by an earlier SB 9 split, or the owner split an adjacent lot
Whether a tenant lived there in the last 3 years, or the building was withdrawn from rent under the Ellis Act
Wetlands, habitat, farmland, hazardous waste sites and conservation easements
Historic district or landmark status: we have no historic layer for this area yet.
Locally adopted fire hazard maps, which can be broader than the State's.

Mapped hazards on this lot

Fire hazard severity zone: Not in a State-mapped zone
FEMA flood zone: Zone X: minimal flood hazardFIRM panel 0602980113A, effective March 23, 2021. Official flood map
Earthquake fault zone: Not in an Alquist-Priolo Earthquake Fault Zone

Built nearby: within ¼ mile since October 2023

New single-family home1
Accessory dwelling unit (new or conversion)6

See them on the map →

Permit counts, by the date issued (or applied, if not yet issued). Lot splits are planning cases, which we don't have.

We read public zoning and hazard maps against state law (ADUs: Gov. Code 66314; SB 9: Gov. Code 65852.21 and 66411.7). Local rules, title, tenancy history and site conditions can change the answer. Check with San Francisco's planning department before relying on it.

Sources: San Francisco Planning, Zoning Map – Zoning Districts (retrieved Oct 31, 2026) · CAL FIRE Office of the State Fire Marshal, Fire Hazard Severity Zones in the State Responsibility Area (effective 2024-04-01) (retrieved Oct 26, 2026) · CAL FIRE Office of the State Fire Marshal, Fire Hazard Severity Zones in the Local Responsibility Area (map dated 2025-03-24) (retrieved Oct 26, 2026) · FEMA, National Flood Hazard Layer — flood hazard zones (retrieved Oct 26, 2026) · FEMA, National Flood Hazard Layer — FIRM panels (retrieved Oct 26, 2026) · California Geological Survey, Alquist-Priolo Earthquake Fault Zones (retrieved Oct 26, 2026) · Zoning classes: our classification of RH-2 as two-family residential, checked against the zone description on Oct 24, 2026

Property & area intelligence timeline

79 events · 19 slow/stalled projects

Chronological history of building permit applications and issuances, snapshot-dated status changes, State housing entitlements, surrounding development within ½ mile, and area home-value trends.

Slow-moving or stalled projects (19)

Active projects spending 12+ months pre-issuance, 24+ months under construction, or 6+ months without new records

StalledAccessory dwelling unit at 1821 Cabrillo StApplied
On this parcel
In "Applied" for 2.4 yr (since Jun 13, 2024), with no new permit record in 2 yr. · 1 unit · $25,000 declared valuation
StalledAccessory dwelling unit at 739 23rd AveApproved
0.23 mi W
In "Approved" for 5.6 yr (since Mar 23, 2021), with no new permit record in 5.6 yr. · 1 unit · $178,800 declared valuation
StalledNew home at 453b 23rd AveIssued
0.4 mi NW
Permit issued and active for 5.3 yr (first record Jul 23, 2021), with no completion or new permit record in 5.3 yr. · 1 unit · $15,000 declared valuation
StalledAccessory dwelling unit at 3411 Anza StApplied
0.43 mi NW
In "Applied" for 5 yr (since Nov 4, 2021), with no new permit record in 5 yr. · 1 unit · $100,000 declared valuation
StalledNew home at 566 20th AveIssued
0.19 mi N
Permit issued and active for 5.7 yr (first record Feb 4, 2021), with no completion or new permit record in 4.6 yr. · 1 unit · $390,000 declared valuation
StalledAccessory dwelling unit at 682 20th AveApplied
220 ft NW
In "Applied" for 4.5 yr (since Apr 26, 2022), with no new permit record in 4.5 yr. · 3 units · $300,000 declared valuation

202615 events

Oct 28, 2026 – Oct 29, 2026Snapshot windowNearby snapshot change
0.44 mi NE
Nearby windows / doors / siding (448 15th Av): Status changed from issued to expired
Record 202411205396 · Detected between snapshots
Source: San Francisco Department of Building Inspection, Building Permits · Snapshot diff within ½ mile
Oct 28, 2026 – Oct 29, 2026Snapshot windowNearby snapshot change
0.44 mi NE
Nearby remodel / interior alteration (448 15th Av): Status changed from issued to complete
Record 202602045259 · Detected between snapshots
Source: San Francisco Department of Building Inspection, Building Permits · Snapshot diff within ½ mile
Oct 28, 2026 – Oct 29, 2026Snapshot windowNearby snapshot change
0.42 mi NW
Nearby plumbing / water heater / sewer (5809 Geary Bl): Status changed from issued to complete
Record 202610089193 · Detected between snapshots
Source: San Francisco Department of Building Inspection, Building Permits · Snapshot diff within ½ mile
Oct 28, 2026 – Oct 29, 2026Snapshot windowNearby snapshot change
0.23 mi W
Nearby remodel / interior alteration (2207 Cabrillo St): First appeared in published agency feed
Record 202610280008 · Detected between snapshots
Source: San Francisco Department of Building Inspection, Building Permits · Snapshot diff within ½ mile
Oct 26, 2026 – Oct 27, 2026Snapshot windowNearby snapshot change
0.44 mi NE
Nearby plan revision / deferred submittal (448 15th Av): Status changed from issued to complete
Record 202409201265 · Detected between snapshots
Source: San Francisco Department of Building Inspection, Building Permits · Snapshot diff within ½ mile
Oct 26, 2026 – Oct 27, 2026Snapshot windowNearby snapshot change
0.3 mi W
Nearby remodel / interior alteration (871 24th Av): Status changed from issued to complete
Record 202603258292 · Detected between snapshots
Source: San Francisco Department of Building Inspection, Building Permits · Snapshot diff within ½ mile
Oct 26, 2026 – Oct 27, 2026Snapshot windowNearby snapshot change
0.28 mi E
Nearby windows / doors / siding (678 15th Av): Status changed from filed to issued
Record 202608277319 · Detected between snapshots
Source: San Francisco Department of Building Inspection, Building Permits · Snapshot diff within ½ mile
Oct 26, 2026 – Oct 27, 2026Snapshot windowNearby snapshot change
0.28 mi E
Nearby windows / doors / siding (678 15th Av): Issued date changed from (blank) to 2026-10-26
Record 202608277319 · Detected between snapshots
Source: San Francisco Department of Building Inspection, Building Permits · Snapshot diff within ½ mile
Oct 26, 2026 – Oct 27, 2026Snapshot windowNearby snapshot change
0.31 mi E
Nearby plumbing / water heater / sewer (683 14th Av): First appeared in published agency feed
Record 202610269897 · Detected between snapshots
Source: San Francisco Department of Building Inspection, Building Permits · Snapshot diff within ½ mile
Oct 23, 2026 – Oct 24, 2026Snapshot windowNearby snapshot change
0.1 mi N
Nearby plumbing / water heater / sewer (631 19th Av): Status changed from issued to complete
Record 202607285678 · Detected between snapshots
Source: San Francisco Department of Building Inspection, Building Permits · Snapshot diff within ½ mile
Oct 23, 2026 – Oct 24, 2026Snapshot windowNearby snapshot change
0.38 mi W
Nearby accessory dwelling unit (new or conversion) (Accessory dwelling unit at 880 26th Ave): First appeared in published agency feed
Record 202610059055 · Detected between snapshots
Source: San Francisco Department of Building Inspection, Building Permits · Snapshot diff within ½ mile
Oct 23, 2026 – Oct 24, 2026Snapshot windowNearby snapshot change
0.43 mi NW
Nearby remodel / interior alteration (5801 Geary Bl): Status changed from issued to complete
Record 202610059061 · Detected between snapshots
Source: San Francisco Department of Building Inspection, Building Permits · Snapshot diff within ½ mile
Oct 23, 2026 – Oct 24, 2026Snapshot windowNearby snapshot change
0.23 mi W
Nearby plumbing / water heater / sewer (679 23rd Av): First appeared in published agency feed
Record 202610229803 · Detected between snapshots
Source: San Francisco Department of Building Inspection, Building Permits · Snapshot diff within ½ mile
Oct 22, 2026Nearby project · Applied
0.38 mi W
Accessory dwelling unit at 880 26th Ave — Applied
880 26th Ave · 1 unit · $150,000 valuation
Source: San Francisco Department of Building Inspection, Building Permits & HCD APR (grouped project within ½ mile)
Sep 17, 2026Nearby project · Applied
230 ft S
Accessory dwelling unit at 747 19th Ave — Applied
747 19th Ave · 1 unit · $50,000 valuation
Source: San Francisco Department of Building Inspection, Building Permits & HCD APR (grouped project within ½ mile)

Showing 15 of 79 timeline events

Recorded sales & deed transfers: California county recorders do not publish open bulk deed-transfer feeds without owner-PII restrictions, so individual sale deeds are not redistributed here. For official assessment roll and recorded transfer history in San Francisco, inspect Property Information Map ↗.

Development graph & closer investigation

6 investigation leads

Cross-referenced intelligence from our historical development graph—connecting parcels, permits, entity-resolved builders, empirical review-time distributions, and neighborhood renovation trends.

Explore full San Francisco development graph →

Developments deserving closer investigation (6)

On this parcel & within ½ mile

Accessory dwelling unit at 1821 Cabrillo StAppliedNo new record in 2 yr
On this parcel
Active in "Applied" for 2.4 yr (first record Jun 13, 2024) with no new permit activity recorded in 2 yr.
New duplex at 1633 Cabrillo StIssuedNo new record in 2 yr$950,000
0.11 mi E
Active in "Issued" for 9.3 yr (first record Jul 20, 2017) with no new permit activity recorded in 2 yr. High-impact scale (2 housing units, $950,000 declared valuation across 2 permits).
2 new homes at 428 15th AveIssuedNo new record in 14 mo$1,879,780
0.46 mi NE
Active in "Issued" for 4.6 yr (first record Apr 7, 2022) with no new permit activity recorded in 14 mo. High-impact scale (2 housing units, $1,879,780 declared valuation across 5 permits).
Accessory dwelling unit at 742 26th AveIssuedNo new record in 10 mo$1,310,000
0.38 mi W
Active in "Issued" for 3.2 yr (first record Aug 28, 2023) with no new permit activity recorded in 10 mo. High-impact scale (2 housing units, $1,310,000 declared valuation across 1 permit).
Accessory dwelling unit at 682 20th AveAppliedNo new record in 4.5 yr
220 ft NW
Active in "Applied" for 4.5 yr (first record Apr 26, 2022) with no new permit activity recorded in 4.5 yr.
New home at 566 20th AveIssuedNo new record in 4.6 yr
0.19 mi N
Active in "Issued" for 5.7 yr (first record Feb 4, 2021) with no new permit activity recorded in 4.6 yr.

Neighborhood renovation & housing momentum: Outer Richmond

Substantial improvements (additions, interior remodels, ADUs, commercial TI, and new builds) across 9,559 parcels

Rank #15 of 37 neighborhoods in acceleration

Last 12m vs prior 12m: 346 vs 298 permits
24m rate per 1,000 parcels: 67.4
5-year substantial permits: 1,472
Housing additions (24m): 38 units

Ownership & rental scenario calculator

Prop 13 tax estimate & area benchmarks

Area rent & home-value benchmarks (kept separate from your assumptions)

Click any benchmark to pre-fill the calculator

HUD Metro Fair Market Rent · San Francisco, CA HUD Metro FMR Area

HUD FY 2026 · 40th-percentile gross rent

Census ACS 5-year median gross rent (all bedroom counts combined):

Outer Richmond$2,378±$77

Area home-value benchmarks (not an appraisal)

ZIP & neighborhood medians

ACS Median Home Value · Outer RichmondCensus ACS 2020–2024 owner-occupied self-reported median

$1,582,000±$91,700

1. Purchase, financing & Prop 13 tax reassessment

Purchase price ($)Down payment (%)$322,000Interest rate (%)Loan termClosing costs (%)$32,200

Prop 13 post-purchase property tax estimate

$1,621/mo ($19,448/yr · 1.21%)

Under California Proposition 13, the seller's historical assessed value does not carry over to a buyer. On sale, the parcel is reassessed at the purchase price: 1.00% base rate ($16,100/yr) + local voter-approved bond debt ($2,898/yr) + fixed direct levies/Mello-Roos ($450/yr).

Voter bond rate (%)$2,898/yrDirect levies / Mello-Roos ($/yr)Check Property Information Map ↗

2. Your rent & operating assumptions

Monthly gross rent ($)Your assumptionVacancy allowance (%)−$180/moManagement (%)$274/moMaintenance (%)$180/moCapEx reserve (%)$180/moInsurance ($/mo)$1,980/yrHOA dues ($/mo)Owner utilities ($/mo)

Insurance & hazard context:

This lot is outside mapped CAL FIRE Fire Hazard Severity Zones and FEMA Special Flood Hazard Areas. California insurance costs still vary widely by roof age, electrical panel, and carrier underwriting; obtain a property-specific quote rather than relying on rules of thumb.

3. Scenario results (based on your assumptions)

Net monthly cash flow: −$7,140
Cash-on-cash return: -24.2%
Cap rate (Year 1 NOI): 0.75%
DSCR (NOI / debt): 0.12x
Break-even gross rent: $12,825/mo
Break-even vacancy: 0% (negative at full occ.)

Monthly cash-flow breakdown (Effective gross $3,420 − Operating $2,419 − Debt $8,141)

Gross scheduled rent$3,600

Vacancy allowance (5%)−$180

Effective gross income$3,420

Prop 13 property tax (1.21%)−$1,621

Property insurance−$165

Management (8%), maintenance (5%) & CapEx (5%)−$634

Net Operating Income (NOI)+$1,001

Mortgage principal & interest (1,288,000 loan)−$8,141

Net monthly cash flow−$7,140

4. Sensitivity & rent-stabilization ceiling (San Francisco)

Scenario	Assumptions	Year 1 Rent	Year 1 Cash Flow	Cash-on-Cash	Break-Even Rent	Year 5 Cash Flow
Conservative	−8% starting rent, +3% vacancy, +3% combined maintenance/CapEx, 1.5%/yr rent growth	$3,312/mo	−$7,554/mo	-25.6%	$13,856/mo	−$7,556/mo
Base (your inputs)	Your entered assumptions, 3.0%/yr rent growth	$3,600/mo	−$7,140/mo	-24.2%	$12,825/mo	−$6,938/mo
Optimistic (cap-limited)	+6% starting rent, 3% vacancy, 4.2%/yr rent growth (capped by local ordinance ceiling of 4.2%/yr)	$3,816/mo	−$6,903/mo	-23.4%	$12,527/mo	−$6,510/mo

Rental regulatory context (informational only — not legal advice):

California AB 1482 (Tenant Protection Act, Civ. Code § 1947.12) caps annual rent increases at 5% + local CPI (max 10%) on covered properties. In San Francisco: San Francisco Rent Ordinance (Admin. Code Ch. 37) — annual allowable increase is 60% of Bay Area CPI (capped at 7%) for covered pre-June 1979 buildings. Official program rules ↗

Common statutory exemption signals under AB 1482

Housing issued a certificate of occupancy within the last 15 years (rolling exemption under AB 1482).
Separately alienable single-family homes or condominiums not owned by a corporation, REIT, or LLC with a corporate member (when required statutory notice is in the lease).
Owner-occupied duplexes where the owner occupied one unit from the start of the tenancy.

Development projects on this parcel

Accessory dwelling unit at 1821 Cabrillo St
Applied1 unitsJun 13, 2024 – Oct 31, 2024

We group related permits and State housing reports into projects. That grouping is our inference, not an official record.

Permit history on this parcel

4 records

Accessory dwelling unit (new or conversion)202405202498
add kitchen to 1st floor to create an adu per government code section 65852.2.per ordinance 95-17.
add kitchen to 1st floor to create an adu per government code section 65852.2.per ordinance 95-17.
Applied
Jun 13, 2024
Issued
Not issued
Recorded status
filed as of Jun 13, 2024
Declared valuation
$25,000
Addition (adds square footage)202003137036
comply with nov #201918911. restore interior stair entrance to existing location. remove illegal kitchen on 4th fl. legalize built partition to create addition office on 4th fl. remove entry door for 4th floor space.
comply with nov #201918911. restore interior stair entrance to existing location. remove illegal kitchen on 4th fl. legalize built partition to create addition office on 4th fl. remove entry door for 4th floor space.
Applied
Mar 13, 2020
Issued
Aug 20, 2020
Recorded status
complete as of Oct 16, 2020
Declared valuation
$50,000
Remodel / interior alteration201905029533
legalize in-law unit at 4th fl per ordinance 43-14
legalize in-law unit at 4th fl per ordinance 43-14
Applied
May 2, 2019
Issued
Not issued
Recorded status
cancelled as of Oct 22, 2019
Declared valuation
$14,000
Windows / doors / siding201711133840
replace siding for back and left side of the building with hardie plank siding. front facade stucco to remain.
replace siding for back and left side of the building with hardie plank siding. front facade stucco to remain.
Applied
Nov 13, 2017
Issued
Nov 14, 2017
Recorded status
complete as of Dec 19, 2017
Declared valuation
$31,000

Source: San Francisco Department of Building Inspection, Building Permits · Geography: parcel (APN) · Retrieved Oct 31, 2026 · Filed, issued, and status dates come from the Department of Building Inspection, which dates each status change.

Housing activity reported to the State

Report year	Project / record	Type	Entitled	Permitted	Completed	Deed-restricted
2024	1821 CABRILLO STREET(2024-005518PRJ)	ADU · Renter	1 (Oct 31, 2024)	—	—	—

Source: California HCD, Housing Element Annual Progress Report — Table A2 · Geography: project (parcel) · Retrieved Oct 26, 2026 · From San Francisco's Housing Element Annual Progress Reports. A project can appear in several report years as it moves from entitlement to permit to completion.

Zoning & planning

Zoning: RH-2: RESIDENTIAL- HOUSE, TWO FAMILY code

Source: San Francisco Planning, Zoning Map – Zoning Districts · Geography: zoning district polygon at parcel point · Retrieved Oct 31, 2026

Parcel facts

Lot size: —
Parcel type: Lot
Addresses on parcel: 1

Source: San Francisco Planning / DataSF, Parcels – Active and Retired · Geography: parcel · Retrieved Oct 31, 2026

Official records

Property Information Map
Zoning, permits, planning cases, and assessor data for this lot (SF Planning)
Assessor-Recorder
Look up block/lot 1662/043. Assessed value is not market value.
Property tax payment
Search by block/lot 1662/043 (SF Treasurer & Tax Collector)
DBI permit tracking
Search building permits, complaints, and inspections by address or block/lot
FEMA Flood Map Service Center
The official flood hazard map for this location. Our reading of it is under What could be built here.

This site does not show owner names.

Scenario

Assumptions

Year 1 Rent

Year 1 Cash Flow

Cash-on-Cash

Break-Even Rent

Year 5 Cash Flow

Conservative

−8% starting rent, +3% vacancy, +3% combined maintenance/CapEx, 1.5%/yr rent growth

$3,312/mo

−$7,554/mo

-25.6%

$13,856/mo

−$7,556/mo

Base (your inputs)

Your entered assumptions, 3.0%/yr rent growth

$3,600/mo

−$7,140/mo

-24.2%

$12,825/mo

−$6,938/mo

Optimistic (cap-limited)

+6% starting rent, 3% vacancy, 4.2%/yr rent growth (capped by local ordinance ceiling of 4.2%/yr)

$3,816/mo

−$6,903/mo

-23.4%

$12,527/mo

−$6,510/mo

Report year

Project / record

Type

Entitled

Permitted

Completed

Deed-restricted

2024

1821 CABRILLO STREET(2024-005518PRJ)

ADU · Renter

1 (Oct 31, 2024)

—