555 Iron Springs Rd
Fairfax 94930 · Unincorporated Fairfax · Unincorporated Marin · Coordinates: 37.99597, -122.60778
Executive Verdict · Public-Records Synthesis
Zoned RSP-0.05 in Unincorporated Marin with likely ADU & SB 9 infill eligibility and mapped CAL FIRE high fire hazard severity zone (state responsibility area) due diligence; benchmark value $1,380,000 ($1,214,000–$1,546,000).
Upsides & Opportunities
- ✓ ADU & SB 9 infill pathways screen as likely eligible
Zoned RSP-0.05 supports ministerial ADU/JADU review plus SB 9 both two-unit development and ministerial urban lot split on a 872,071 sq ft lot.
Source: Unincorporated Marin zoning · CA Gov. Code 66314 & 65852.21
- ✓ Documented permitted upgrades (+$126,000 contributory est.)
Public building records show issued construction/renovation work on this parcel (2 total permits, latest May 15, 2024).
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)
- ! Delayed or open permit activity on this parcel
General repair (92193): Pending in review for 2.5 yr (11.0× the 83d median) — slower than 90% of general repair permits in Unincorporated Marin (median 83d, 90th pct 328d, n=693).
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: 54 new homes (0.46 mi NE, 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:
- 872,071 sq ft (20.02 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 555 IRON SPRINGS RD
Zoning & Land Use
RSP-0.05 — Residential Single Family Planned (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned RSP-0.05 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned RSP-0.05, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned RSP-0.05, a single-family residential zone. The lot is 872,071 sq ft by the assessor, room for two lots of at least 1,200 sq ft, each at least 40% of the original.
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 06041C0451E, effective March 17, 2014
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $1,214,000 – $1,546,000 · Status: Off market
HUD Small Area FMR (ZIP 94930) · FY 2026
Studio $2,230 · 1BR $2,680 · 2BR $3,240 · 3BR $4,140 · 4BR $4,290
Developments Deserving Closer Investigation & Active Area Builders
- 54 new homes (Issued)0.46 mi NE
Active in "Issued" for 8 yr (first record Nov 26, 2018) with no new permit activity recorded in 8 yr. High-impact scale (54 housing units, 54 deed-restricted affordable across 0 permits).
- General repair (92193) (Applied)On this parcel
Pending in review for 2.5 yr (11.0× the 83d median) — slower than 90% of general repair permits in Unincorporated Marin (median 83d, 90th pct 328d, n=693).
- Victory Village Senior Housing (Finaled / completed)0.46 mi NE
High-impact scale (54 housing units, 54 deed-restricted affordable across 0 permits).
Entity-resolved builders & contractors in ½ mile: Jam Construction (1 on parcel, 1 in ½ mi · Remodel / interior alteration).
Permit & Project History on This Parcel (2 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 92193 | General repair | Applied | App. May 15, 2024 | $50,000 | Roadway And Slope Remediation For Roadway Edge Failure |
| 171407 | Remodel / interior alteration | Issued | Iss. May 11, 2022 | $472,000 | Remodel, Including Kitchen, Bath, Layout Changes Elsewhere M C F D |