42 Baywood Canyon Rd
Fairfax 94930 · Unincorporated Fairfax · Unincorporated Marin · Coordinates: 38.00615, -122.61291
Executive Verdict · Public-Records Synthesis
Zoned RMP-0.44 in Unincorporated Marin with likely ministerial ADU eligibility and mapped CAL FIRE moderate fire hazard severity zone (state responsibility area) due diligence; benchmark value $1,377,000 ($1,212,000–$1,542,000).
Upsides & Opportunities
- ✓ Ministerial ADU / JADU pathway likely eligible
Zone RMP-0.44 allows residential use qualifying for ministerial ADU review under state law.
Source: Unincorporated Marin zoning · CA Gov. Code 66314
- ✓ Documented permitted upgrades (+$11,200 contributory est.)
Public building records show issued construction/renovation work on this parcel (5 total permits, latest Nov 8, 2026).
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 Moderate 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
Solar / battery storage (76392): Pending in review for 10.9 yr — slower than 90% of solar / battery storage permits in Unincorporated Marin (median 0d, 90th pct 2d, n=2,977).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (review-time benchmark)
- ! 2 slow or stalled nearby projects within ½ mile
Closest lead: New commercial building at 3125 Sir Francis Drake Blvd (0.43 mi W, 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:
- 18,208 sq ft (0.42 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 42 BAYWOOD CANYON RD
Zoning & Land Use
RMP-0.44 — Residential Multiple Planned (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned RMP-0.44 (multifamily residential): state law allows ADUs where homes are allowed. On a multifamily lot the state allowance is different: ADUs in non-living space of the building, plus up to eight detached ADUs.
- SB 9: two homes on the lotUnlikely
Zoned RMP-0.44 (multifamily residential), not a single-family residential zone.
- SB 9: split into two lotsUnlikely
Zoned RMP-0.44 (multifamily residential), not a single-family residential zone.
Mapped Hazard Zones on This Lot
- CAL FIRE Fire Hazard Severity Zone
- Moderate 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 06041C0288D, 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: $1,212,000 – $1,542,000 · 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
- Solar / battery storage (76392) (Applied)On this parcel
Pending in review for 10.9 yr — slower than 90% of solar / battery storage permits in Unincorporated Marin (median 0d, 90th pct 2d, n=2,977).
- New commercial building at 3125 Sir Francis Drake Blvd (Issued)0.43 mi W
Active in "Issued" for 7.8 yr (first record Jan 10, 2019) with no new permit activity recorded in 3.5 yr. High-impact scale ($1,302,034 declared valuation across 3 permits).
- Accessory dwelling unit at 59 Baywood Canyon Rd (Applied)0.21 mi NW
In "Applied" for 4 yr (since Oct 26, 2022), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
Entity-resolved builders & contractors in ½ mile: Tesla Energy (2 on parcel, 2 in ½ mi · Solar / battery storage); Able Roofing (1 on parcel, 1 in ½ mi · Roof replacement); Tesla Energy Operations (1 on parcel, 1 in ½ mi · Other); Owner Builder (3 in ½ mi · Commercial tenant improvement); Midstate Construction (2 in ½ mi · New commercial / non-residential building).
Permit & Project History on This Parcel (5 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| B49053 | Roof replacement | Issued | Iss. Nov 8, 2026 | $36,730 | ReRoofing; With Electronic Inspection |
| B48313 | Other | Issued | Iss. Sep 14, 2026 | $2,500 | — |
| 167851 | Solar / battery storage | Issued | Iss. Apr 20, 2021 | $14,000 | Energy Storage System - Express |
| 150319 | Solar / battery storage | Issued | Iss. Jan 6, 2016 | $10,918 | P V Rf Mtd 4.94 K W - Express, E-Insp |
| 76392 | Solar / battery storage | Applied | App. Dec 23, 2015 | $10,918 | P V Sys 4.94 K W - Express, E-Insp |