220 Martinique Ave
Tiburon 94920 · Paradise Cay · Unincorporated Marin · Coordinates: 37.91293, -122.47523
Executive Verdict · Public-Records Synthesis
Zoned RSP-5.8-BFC in Unincorporated Marin with likely ADU & SB 9 infill eligibility and zero mapped flood, fire, or fault hazard overlaps; benchmark value $3,068,000 ($2,700,000–$3,436,000).
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 7,536 sq ft lot.
Source: Unincorporated Marin zoning · CA Gov. Code 66314 & 65852.21
- ✓ Documented permitted upgrades (+$30,668 contributory est.)
Public building records show issued construction/renovation work on this parcel (2 total permits, latest Aug 14, 2018).
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)
about 98% 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)
- ! 6 slow or stalled nearby projects within ½ mile
Closest lead: New home at 149 Jamaica St (450 ft SW, 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 (~$35,732/yr at $3,068,000)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$2,978/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:
- 7,536 sq ft (0.17 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 220 MARTINIQUE AVE
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 7,536 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
- Not in a State-mapped fire hazard severity zone
- FEMA National Flood Hazard Layer
- Zone X: minimal flood hazard (about 98% of the lot); Zone X: 0.2% annual chance flood hazard (shaded X) (about 2% 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: $2,700,000 – $3,436,000 · 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)450 ft SW
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 (Entitled)440 ft S
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 at 225 Trinidad Dr (lot #9) (Issued)0.19 mi W
Active in "Issued" for 12.7 yr (first record Feb 12, 2014) with no new permit activity recorded in 12.3 yr.
- New home at 229 Trinidad Dr (lot #10) (Issued)0.2 mi W
Active in "Issued" for 12.7 yr (first record Feb 12, 2014) with no new permit activity recorded in 12.3 yr.
Entity-resolved builders & contractors in ½ mile: Pesa Construction (1 on parcel, 1 in ½ mi · Remodel / interior alteration); DR Design Construction (1 on parcel, 1 in ½ mi · Remodel / interior alteration); Owner Builder (15 in ½ mi · Remodel / interior alteration); Owner (11 in ½ mi · Remodel / interior alteration); Davidson Builders (9 in ½ mi · New single-family home).
Permit & Project History on This Parcel (2 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 159320 | Remodel / interior alteration | Issued | Iss. Aug 14, 2018 | $12,000 | Kit Rmdl, Structural, Rmdl Kitch & 3 Baths, Elec, Incl Sub Panel, Windows Td 5/31/18 |
| 158440 | Remodel / interior alteration | Issued | Iss. May 9, 2018 | $70,000 | Rmdl Kit & 3 Baths; Electrical, Incl New Subpanel,***Expired Wndws- Express |