22667 State Route 1
Marshall 94940 · East Shore · Unincorporated Marin · Coordinates: 38.19167, -122.91817
Executive Verdict · Public-Records Synthesis
Zoned C-RSP-0.5 in Unincorporated Marin with likely ministerial ADU eligibility and mapped FEMA VE flood / CAL FIRE moderate fire hazard severity zone (state responsibility area) due diligence; benchmark value $1,906,000 ($1,677,000–$2,135,000).
Upsides & Opportunities
- ✓ Ministerial ADU / JADU pathway likely eligible
Zone C-RSP-0.5 allows residential use qualifying for ministerial ADU review under state law.
Source: Unincorporated Marin zoning · CA Gov. Code 66314
- ✓ Documented permitted upgrades (+$149,872 contributory est.)
Public building records show issued construction/renovation work on this parcel (12 total permits, latest Apr 20, 2026).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (parcel APN)
Watchouts & Due Diligence
- ! FEMA Special Flood Hazard Area (VE, about 64% of the lot of lot)
Zone VE: 1% annual chance flood (Special Flood Hazard Area) overlaps this parcel. Expect mandatory flood insurance for federally backed loans and floodplain elevation/mitigation rules for new units or SB 9 applications.
Source: FEMA National Flood Hazard Layer (parcel polygon)
- ! CAL FIRE Moderate Fire Hazard Severity Zone (State Responsibility Area) (about 38% of the lot of lot)
Located in a mapped Fire Hazard Severity Zone. Expect Chapter 7A ignition-resistant building standards, defensible-space inspections, and stricter property insurance underwriting.
Source: CAL FIRE FHSZ (map Apr 1, 2024)
- ! Delayed or open permit activity on this parcel
New home at 22667 State Route: Active in "Issued" for 5.6 yr (first record Apr 1, 2021) with no new permit activity recorded in 2.3 yr.
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (review-time benchmark)
- ! 1 slow or stalled nearby project within ½ mile
Closest lead: New home at 22495 State Route (0.19 mi SE, issued). Inspect timeline history before assuming near-term completion.
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · HCD APR (½-mile radius)
Parcel & Assessor
- Lot size:
- 51,531 sq ft (1.18 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 22667 STATE ROUTE 1
Zoning & Land Use
C-RSP-0.5 — Residential Single Family Planned (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned C-RSP-0.5 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotPossible, with conditions
Zoned C-RSP-0.5, a single-family residential zone. FEMA Special Flood Hazard Area (Zone VE) covers about 64% of the lot: the project must meet the National Flood Insurance Program floodplain standards, or the lot needs a map revision.
- SB 9: split into two lotsPossible, with conditions
Zoned C-RSP-0.5, a single-family residential zone. The lot is 51,531 sq ft by the assessor, room for two lots of at least 1,200 sq ft, each at least 40% of the original. FEMA Special Flood Hazard Area (Zone VE) covers about 64% of the lot: the project must meet the National Flood Insurance Program floodplain standards, or the lot needs a map revision.
Mapped Hazard Zones on This Lot
- CAL FIRE Fire Hazard Severity Zone
- Moderate Fire Hazard Severity Zone (State Responsibility Area) (about 38% of the lot, map Apr 1, 2024)
- FEMA National Flood Hazard Layer
- Zone VE: 1% annual chance flood (Special Flood Hazard Area) (about 64% of the lot); Zone X: minimal flood hazard (about 36% of the lot) · FIRM panel 06041C0085E, effective August 15, 2017
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $1,677,000 – $2,135,000 · Status: Off market
HUD Small Area FMR (ZIP 94940) · FY 2026
Studio $2,050 · 1BR $2,510 · 2BR $2,990 · 3BR $3,870 · 4BR $4,090
Developments Deserving Closer Investigation & Active Area Builders
- New home at 22667 State Route (Issued)On this parcel
Active in "Issued" for 5.6 yr (first record Apr 1, 2021) with no new permit activity recorded in 2.3 yr.
- Other (94156) (Applied)On this parcel
Pending in review for 7 mo — slower than 90% of other permits in Unincorporated Marin (median 0d, 90th pct 71d, n=1,560).
- New garage / accessory structure (177544) (Issued)On this parcel
Issued after 2.3 yr (5.2× the 164d median) — slower than 90% of new garage / accessory structure permits in Unincorporated Marin (median 164d, 90th pct 485d, n=356).
- Addition (adds square footage) (177065) (Issued)On this parcel
Issued after 2.9 yr (6.6× the 160d median) — slower than 90% of addition (adds square footage) permits in Unincorporated Marin (median 160d, 90th pct 440d, n=316).
Entity-resolved builders & contractors in ½ mile: Owner Builder (2 on parcel, 2 in ½ mi · Addition (adds square footage)); Sun First (2 on parcel, 2 in ½ mi · Electrical / panel); Elevated Comfort (1 on parcel, 1 in ½ mi · Other); Nexus Energy (1 on parcel, 1 in ½ mi · Solar / battery storage); Tesla Energy (1 on parcel, 1 in ½ mi · Electrical / panel).
Permit & Project History on This Parcel (12 permits, 1 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 94156 | Other | Applied | App. Apr 20, 2026 | $15,000 | Replace Repair Of (E) Back Deck |
| B46438 | Other | Issued | Iss. Apr 9, 2026 | $14,000 | Mechanical Appliance |
| B45827 | Electrical / panel | Issued | Iss. Feb 10, 2026 | $4,521 | Service Upgrade |
| 177544 | New garage / accessory structure | Issued | Iss. Sep 10, 2024 | $60,000 | Front Deck/Carport & Window Replacement |
| 177065 |