18 Sage Ln
San Geronimo 94963 · San Geronimo Valley · Unincorporated Marin · Coordinates: 38.01681, -122.68411
Executive Verdict · Public-Records Synthesis
Zoned ARP-20-SGV in Unincorporated Marin and mapped CAL FIRE high fire hazard severity zone (state responsibility area) due diligence; benchmark value $1,340,000 ($1,179,000–$1,501,000).
Upsides & Opportunities
- ✓ 3 documented municipal building permits on file
On-parcel permit history is indexed through Oct 6, 2020, letting you verify roof, HVAC, electrical, or structural work against seller disclosures.
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (parcel APN)
Watchouts & Due Diligence
- ! Mapped flood awareness zone (Zone X: minimal flood hazard)
all of the lot of the parcel intersects Zone X: minimal flood hazard. Outside mandatory federal SFHA insurance rules, but check local drainage and finished-floor requirements.
Source: FEMA National Flood Hazard Layer (parcel polygon)
- ! CAL FIRE High Fire Hazard Severity Zone (State Responsibility Area) (all 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)
- ! 6 slow or stalled nearby projects within ½ mile
Closest lead: Accessory dwelling unit at 22 (22a) Sage Ln (130 ft NW, 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)
- ! Year 1 Prop 13 tax reset (~$15,860/yr at $1,340,000)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$1,322/mo). Confirm exact Mello-Roos / CFD special assessments on the county tax bill.
Source: CA Const. Art. XIIIA (Prop 13) · County Tax Collector
Parcel & Assessor
- Lot size:
- 26,092 sq ft (0.60 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 18 SAGE LN
Zoning & Land Use
ARP-20-SGV — Agriculture Residential Planned (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADUCan't tell
Zoned ARP-20-SGV (agricultural): ADUs are allowed if the zone allows a home, which depends on the zone's rules.
- SB 9: two homes on the lotUnlikely
Zoned ARP-20-SGV (agricultural), not a single-family residential zone.
- SB 9: split into two lotsUnlikely
Zoned ARP-20-SGV (agricultural), not a single-family residential zone.
Mapped Hazard Zones on This Lot
- CAL FIRE Fire Hazard Severity Zone
- High Fire Hazard Severity Zone (State Responsibility Area) (all of the lot, map Apr 1, 2024)
- FEMA National Flood Hazard Layer
- Zone X: minimal flood hazard (all of the lot) · FIRM panel 06041C0275D, effective May 4, 2009
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $1,179,000 – $1,501,000 · Status: Off market
HUD Small Area FMR (ZIP 94963) · FY 2026
Studio $2,500 · 1BR $3,000 · 2BR $3,630 · 3BR $4,630 · 4BR $4,800
Developments Deserving Closer Investigation & Active Area Builders
- Accessory dwelling unit at 22 (22a) Sage Ln (Issued)130 ft NW
Active in "Issued" for 3.9 yr (first record Dec 12, 2022) with no new permit activity recorded in 18 mo.
- Accessory dwelling unit at 103 Juarez Ave (Issued)0.21 mi SW
Active in "Issued" for 5.2 yr (first record Aug 24, 2021) with no new permit activity recorded in 4.1 yr.
- New home at 42 Juarez Ave (Issued)0.28 mi SW
Active in "Issued" for 10.2 yr (first record Aug 31, 2016) with no new permit activity recorded in 9.7 yr.
- Demolition at 2 Juarez Ave (Issued)0.3 mi SW
Active in "Issued" for 9.9 yr (first record Dec 28, 2016) with no new permit activity recorded in 8.9 yr.
Entity-resolved builders & contractors in ½ mile: Braintree Woodworks (1 on parcel, 1 in ½ mi · Windows / doors / siding); Capstone Roofing (1 on parcel, 1 in ½ mi · Roof replacement); A To Z Heating And Air (1 on parcel, 1 in ½ mi · HVAC / heat pump); Owner Builder (8 in ½ mi · Accessory dwelling unit (new or conversion)); Owner (7 in ½ mi · Accessory dwelling unit (new or conversion)).
Permit & Project History on This Parcel (3 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| B23756 | Roof replacement | Issued | Iss. Oct 6, 2020 | $14,900 | Remove existing roof. Install with new Lifetime Class A composition shingles. — ReRoofing |
| B18235 | Windows / doors / siding | Issued | Iss. Jul 10, 2019 | $25,000 | Window replacement in kind — Non-structural Door/Window Replacement |
| 152416 | HVAC / heat pump | Issued | Iss. Jun 16, 2016 | $9,077 | Change Out A/C Condenser & Coil |