4660 Paradise Dr
Tiburon 94920 · Paradise Cay · Unincorporated Marin · Coordinates: 37.91184, -122.47851
Executive Verdict · Public-Records Synthesis
Zoned RSP-5.8-BFC in Unincorporated Marin with likely ADU & SB 9 infill eligibility and mapped CAL FIRE moderate fire hazard severity zone (local responsibility area) due diligence; benchmark value $3,231,000 ($2,843,000–$3,619,000).
Upsides & Opportunities
- ✓ ADU & SB 9 infill pathways screen as likely eligible
Zoned RSP-5.8-BFC supports ministerial ADU/JADU review plus SB 9 both two-unit development and ministerial urban lot split on a 16,379 sq ft lot.
Source: Unincorporated Marin zoning · CA Gov. Code 66314 & 65852.21
- ✓ Documented permitted upgrades (+$8,111 contributory est.)
Public building records show issued construction/renovation work on this parcel (4 total permits, latest Nov 2, 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 (Local 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 Mar 24, 2025)
- ! 6 slow or stalled nearby projects within ½ mile
Closest lead: New home at 149 Jamaica St (0.12 mi E, 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 (~$37,607/yr at $3,231,000)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$3,134/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:
- 16,379 sq ft (0.38 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 4660 PARADISE DR
Zoning & Land Use
RSP-5.8-BFC — Residential Single Family Planned (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned RSP-5.8-BFC (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned RSP-5.8-BFC, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned RSP-5.8-BFC, a single-family residential zone. The lot is 16,379 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
- Moderate Fire Hazard Severity Zone (Local Responsibility Area) (all of the lot, map Mar 24, 2025)
- FEMA National Flood Hazard Layer
- Zone X: minimal flood hazard (all of the lot) · FIRM panel 06041C0486E, effective March 16, 2016
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $2,843,000 – $3,619,000 · Status: Off market
HUD Small Area FMR (ZIP 94920) · FY 2026
Studio $2,820 · 1BR $3,380 · 2BR $4,100 · 3BR $5,230 · 4BR $5,420
Developments Deserving Closer Investigation & Active Area Builders
- New home at 149 Jamaica St (Issued)0.12 mi E
Active in "Issued" for 12.2 yr (first record Aug 19, 2014) with no new permit activity recorded in 12 yr. High-impact scale (1 housing unit, $750,000 declared valuation across 1 permit).
- New home at 4970 Ranch Rd (Issued)0.47 mi NW
Active in "Issued" for 11.4 yr (first record Jun 2, 2015) with no new permit activity recorded in 11.2 yr. High-impact scale (1 housing unit, $1,200,000 declared valuation across 1 permit).
- New home (Entitled)0.16 mi E
In "Entitled" for 5.1 yr (since Oct 7, 2021), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
- New home (Entitled)0.39 mi NW
In "Entitled" for 8.5 yr (since May 17, 2018), 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: La Solar Group (1 on parcel, 1 in ½ mi · Solar / battery storage); Armenak Ter Petrosyan (1 on parcel, 1 in ½ mi · Roof replacement); Tesla Energy (1 on parcel, 1 in ½ mi · Solar / battery storage); Cassini Construction (1 on parcel, 1 in ½ mi · Windows / doors / siding); Owner Builder (15 in ½ mi · Remodel / interior alteration).
Permit & Project History on This Parcel (4 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| B48974 | Windows / doors / siding | Issued | Iss. Nov 2, 2026 | $10,000 | Non-structural Door/Window Replacement |
| B48134 | Roof replacement | Issued | Iss. Sep 2, 2026 | $13,200 | ReRoofing |
| B41625 | Solar / battery storage | Issued | Iss. Mar 17, 2025 | $18,775 | installation of 5.850 kw 13 solar modules, 13 x microinverters, 2 x batteries, 2 x PV combiner boxes, 1 x AC Disconnect |
| 149084 | Solar / battery storage | Issued | Iss. Sep 23, 2015 | $10,343 | Rf Mtd P V Sys 4.68 K W - Express. E-Insp |