6740 Sir Francis Drake Blvd
Forest Knolls 94933 · Forest Knolls · Unincorporated Marin · Coordinates: 38.01758, -122.68536
Executive Verdict · Public-Records Synthesis
Zoned RA-B4-SGV in Unincorporated Marin with likely ministerial ADU eligibility and mapped CAL FIRE high fire hazard severity zone (state responsibility area) due diligence; benchmark value $887,000 ($781,000–$993,000).
Upsides & Opportunities
- ✓ Ministerial ADU / JADU pathway likely eligible
Zone RA-B4-SGV allows residential use qualifying for ministerial ADU review under state law (1 ADU permit permitted within ¼ mile in 36 months).
Source: Unincorporated Marin zoning · CA Gov. Code 66314
- ✓ 2 documented municipal building permits on file
On-parcel permit history is indexed through Dec 10, 2025, 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 (320 ft 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)
- ! Year 1 Prop 13 tax reset (~$10,651/yr at $887,000)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$888/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:
- 219,368 sq ft (5.04 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 6740 SIR FRANCIS DRAKE BLVD
Zoning & Land Use
RA-B4-SGV — Residential Agriculture (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned RA-B4-SGV (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotCan't tell
Zoned RA-B4-SGV (single-family residential): we can't tell whether it counts as a single-family zone for SB 9. Residential agriculture, estate and restricted: large-lot residential; confirm SB 9 with the county.
- SB 9: split into two lotsCan't tell
Zoned RA-B4-SGV (single-family residential): we can't tell whether it counts as a single-family zone for SB 9. Residential agriculture, estate and restricted: large-lot residential; confirm SB 9 with the county.
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: $781,000 – $993,000 · Status: Off market
HUD Small Area FMR (ZIP 94933) · FY 2026
Studio $2,870 · 1BR $3,440 · 2BR $4,160 · 3BR $5,310 · 4BR $5,510
Developments Deserving Closer Investigation & Active Area Builders
- Accessory dwelling unit at 22 (22a) Sage Ln (Issued)320 ft SE
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)0.22 mi S
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)0.27 mi SW
Active in "Issued" for 10.2 yr (first record Aug 31, 2016) with no new permit activity recorded in 9.7 yr.
- New home at 94 Tamal Rd (Issued)0.27 mi NW
Active in "Issued" for 11.7 yr (first record Feb 26, 2015) with no new permit activity recorded in 8.7 yr.
Entity-resolved builders & contractors in ½ mile: North HVAC Services (2 on parcel, 2 in ½ mi · HVAC / heat pump); Owner Builder (8 in ½ mi · Accessory dwelling unit (new or conversion)); Owner (6 in ½ mi · Remodel / interior alteration); Zia Designs (2 in ½ mi · Demolition); Rebuilding Together East Bay Network (1 in ½ mi · Accessory dwelling unit (new or conversion)).
Permit & Project History on This Parcel (2 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| B45119 | HVAC / heat pump | Issued | Iss. Dec 10, 2025 | $14,375 | Installation of ductless Residential Mitsubishi heat pump, multi zone system. — Mechanical Appliance |
| B44380 | HVAC / heat pump | Issued | Iss. Oct 15, 2025 | $25,825 | Multizone ductless heat pump installation. — Mechanical Appliance |