San Francisco · Treasure Island · Block/lot 8928/001 · San Francisco
Since October 2024 within ½ mile: 1 commercial or mixed-use project.
1 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.
20 permits within ½ mile since October 2024
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.
Source: San Francisco Department of Building Inspection, Building Permits · Geography: permits located by parcel, ½ mile radius · Retrieved Oct 29, 2026
Insufficient area benchmark data
No ADU or new-home permits recorded within ¼ mile in this window.
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 29, 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 TI-PCI as public / institutional, checked against the zone description on Oct 24, 2026
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.
In "Approved" for 2.8 yr (since Jan 4, 2024), with no new permit record in 2.8 yr. · $384,560 declared valuation
Permit issued and active for 5.1 yr (first record Oct 4, 2021), with no completion or new permit record in 4.4 yr. · $208,000 declared valuation
Permit issued and active for 5.1 yr (first record Oct 4, 2021), with no completion or new permit record in 3.5 yr. · $600,000 declared valuation
In "Entitled" for 2.5 yr (since May 16, 2024), with no new permit record in 2.5 yr. · 1 unit
Nearby remodel / interior alteration (449 Avenue H): First appeared in published agency feed
Record 202610239811 · Detected between snapshots
Source: San Francisco Department of Building Inspection, Building Permits · Snapshot diff within ½ mile
Remodel / interior alteration permit application filed (202605151325)
Current status: filed
puc proj-26-0638: install underground fire service line from new 12-inch w1 water main connection from 13th st to treasure island waste water resource. recovery facility for db-132 project facility. requesting confirmation of 10-inch fire service size,backflow · Declared valuation: $125,000
Source: San Francisco Department of Building Inspection, Building Permits · Geography: parcel
Fire alarm / sprinkler permit application filed (202601284759)
Current status: filed
puc proj-26-0628: manual fire alarm system · Declared valuation: $25,000
Source: San Francisco Department of Building Inspection, Building Permits · Geography: parcel
449 Ave H · $31,100,000 valuation
Records span Apr 24, 2025 to Jan 6, 2026 (8 permits).
Source: San Francisco Department of Building Inspection, Building Permits & HCD APR (grouped project within ½ mile)
Remodel / interior alteration permit application filed (202509306389)
Current status: approved
proj-25-0623 - building 930: supply and install a complete clean agent fire suppression system in the data storage room of new building. reference pa 202401043446. · Declared valuation: $133,825
Source: San Francisco Department of Building Inspection, Building Permits · Geography: parcel
Fire alarm / sprinkler permit application filed (202509155296)
Current status: approved
puc proj-25-0618: bldg #513 - chemical storage canopy - wet fire sprinkler system, new underground 5'-0" stub out. install backflow preventor and fire department connection. · Declared valuation: $252,873
Source: San Francisco Department of Building Inspection, Building Permits · Geography: parcel
Source: San Francisco Department of Building Inspection, Building Permits & HCD APR (grouped project within ½ mile)
New commercial / non-residential building permit application filed (202401043446)
Current status: approved
puc proj-24-0577: 600 portway passage building id #930: construction of the treasure island water resource recovery facility. under contract db-132. · Declared valuation: $384,560
Source: San Francisco Department of Building Inspection, Building Permits · Geography: parcel
New commercial / non-residential building permit application filed (202401043450)
Current status: approved
puc proj-24-0579: 600 portway passage building id #940: construction of the treasure island water resource recovery facility. under contract db-132 · Declared valuation: $2,897,120
Source: San Francisco Department of Building Inspection, Building Permits · Geography: parcel
New commercial / non-residential building permit application filed (202401043451)
Current status: approved
puc proj-24-0580: 600 portway passage building id #513: construction of the treasure island water resource recovery facility. under contract db-132 · Declared valuation: $1,130,880
Source: San Francisco Department of Building Inspection, Building Permits · Geography: parcel
New commercial / non-residential building permit application filed (202401043452)
Current status: approved
puc proj-24-0581: 600 portway passage building id #320: construction of the treasure island water resource recovery facility. under contract db-132 · Declared valuation: $934,800
Source: San Francisco Department of Building Inspection, Building Permits · Geography: parcel
New commercial / non-residential building permit application filed (202401043453)
Current status: approved
puc proj-24-0582: 600 portway passage building id #34: construction of the treasure island water resource recovery facility. under contract db-132 · Declared valuation: $608,760
Source: San Francisco Department of Building Inspection, Building Permits · Geography: parcel
New commercial / non-residential building permit application filed (202401043454)
Current status: approved
puc proj-24-0583: 600 portway passage building id #32: construction of the treasure island water resource recovery facility. under contract db-132 · Declared valuation: $384,560
Source: San Francisco Department of Building Inspection, Building Permits · Geography: parcel
Remodel / interior alteration permit issued (M1231427)
Recorded status: issued
add address 806 13th ti st per puc request the develivery of const materials for the "new" wastewater plant per dt prjtask0107625. · Declared valuation: $244
Source: San Francisco Department of Building Inspection, Building Permits · Geography: parcel
Remodel / interior alteration permit application filed (M1231427)
Current status: issued
add address 806 13th ti st per puc request the develivery of const materials for the "new" wastewater plant per dt prjtask0107625. · Declared valuation: $244
Source: San Francisco Department of Building Inspection, Building Permits · Geography: parcel
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 →Active in "Approved" for 2.8 yr (first record Jan 4, 2024) with no new permit activity recorded in 2.8 yr.
Active in "Issued" for 18 mo (first record Apr 24, 2025) with no new permit activity recorded in 10 mo. High-impact scale ($31,100,000 declared valuation across 8 permits).
Active in "Issued" for 5.1 yr (first record Oct 4, 2021) with no new permit activity recorded in 3.5 yr.
Active in "Issued" for 5.1 yr (first record Oct 4, 2021) with no new permit activity recorded in 4.4 yr.
Active in "Entitled" for 2.5 yr (first record May 16, 2024) with no new permit activity recorded in 2.5 yr.
High-impact scale (9 housing units, $2,000,000 declared valuation across 9 permits).
Substantial improvements (additions, interior remodels, ADUs, commercial TI, and new builds) across 190 parcels
Small prior baseline
City baseline: 91.1 / 1k
15 in trailing 24m
Includes 0 ADUs
HUD Metro Fair Market Rent · San Francisco, CA HUD Metro FMR Area
HUD FY 2026 · 40th-percentile gross rentCensus ACS 5-year median gross rent (all bedroom counts combined):
Area home-value benchmarks (not an appraisal)
ZIP & neighborhood mediansUnder 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 ($5,500/yr) + local voter-approved bond debt ($990/yr) + fixed direct levies/Mello-Roos ($450/yr).
Insurance & hazard context:
−$8,856/yr
Cash needed: $121,000
NOI: $24,517/yr
P&I: $2,781/mo
For $0/mo net cash flow
At $3,600/mo rent
| 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 | −$1,152/mo | -11.4% | $4,920/mo | −$1,068/mo |
| Base (your inputs) | Your entered assumptions, 3.0%/yr rent growth | $3,600/mo | −$738/mo | -7.3% | $4,554/mo | −$450/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 | −$501/mo | -5.0% | $4,448/mo | −$21/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 ↗
ApprovedJan 4, 2024 – Jan 4, 2024
We group related permits and State housing reports into projects. That grouping is our inference, not an official record.
puc proj-26-0638: install underground fire service line from new 12-inch w1 water main connection from 13th st to treasure island waste water resource. recovery facility for db-132 project facility. requesting confirmation of 10-inch fire service size,backflow
puc proj-26-0628: manual fire alarm system
proj-25-0623 - building 930: supply and install a complete clean agent fire suppression system in the data storage room of new building. reference pa 202401043446.
puc proj-25-0618: bldg #513 - chemical storage canopy - wet fire sprinkler system, new underground 5'-0" stub out. install backflow preventor and fire department connection.
puc proj-24-0583: 600 portway passage building id #32: construction of the treasure island water resource recovery facility. under contract db-132
puc proj-24-0582: 600 portway passage building id #34: construction of the treasure island water resource recovery facility. under contract db-132
puc proj-24-0581: 600 portway passage building id #320: construction of the treasure island water resource recovery facility. under contract db-132
puc proj-24-0580: 600 portway passage building id #513: construction of the treasure island water resource recovery facility. under contract db-132
puc proj-24-0579: 600 portway passage building id #940: construction of the treasure island water resource recovery facility. under contract db-132
puc proj-24-0577: 600 portway passage building id #930: construction of the treasure island water resource recovery facility. under contract db-132.
add address 806 13th ti st per puc request the develivery of const materials for the "new" wastewater plant per dt prjtask0107625.
Source: San Francisco Department of Building Inspection, Building Permits · Geography: parcel (APN) · Retrieved Oct 29, 2026 · Filed, issued, and status dates come from the Department of Building Inspection, which dates each status change.
No housing activity reported to the State for this parcel (2018–2025 reports).
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.
Source: San Francisco Planning, Zoning Map – Zoning Districts · Geography: zoning district polygon at parcel point · Retrieved Oct 29, 2026
600 PORTWAY PSGE
Source: San Francisco Planning / DataSF, Parcels – Active and Retired · Geography: parcel · Retrieved Oct 29, 2026
Zoning, permits, planning cases, and assessor data for this lot (SF Planning)
Look up block/lot 8928/001. Assessed value is not market value.
Search by block/lot 8928/001 (SF Treasurer & Tax Collector)
Search building permits, complaints, and inspections by address or block/lot
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.