204 Sea View Ave
San Rafael 94901 · Country Club · Unincorporated Marin · Coordinates: 37.97372, -122.50593
Executive Verdict · Public-Records Synthesis
Zoned R1-B4 in Unincorporated Marin with likely ADU & SB 9 infill eligibility and zero mapped flood, fire, or fault hazard overlaps; benchmark value $1,756,000 ($1,545,000–$1,967,000).
Upsides & Opportunities
- ✓ ADU & SB 9 infill pathways screen as likely eligible
Zoned R1-B4 supports ministerial ADU/JADU review plus SB 9 both two-unit development and ministerial urban lot split on a 70,611 sq ft lot. Local precedent is active with 3 ADU permits within ¼ mile over the last 36 months.
Source: Unincorporated Marin zoning · CA Gov. Code 66314 & 65852.21
- ✓ Documented permitted upgrades (+$22,160 contributory est.)
Public building records show issued construction/renovation work on this parcel (6 total permits, latest Jun 17, 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)
- ! 6 slow or stalled nearby projects within ½ mile
Closest lead: New home (0.41 mi W, entitled). 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 (~$20,644/yr at $1,756,000)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$1,720/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:
- 70,611 sq ft (1.62 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 204 SEA VIEW AVE
Zoning & Land Use
R1-B4 — Residential Single Family (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned R1-B4 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned R1-B4, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned R1-B4, a single-family residential zone. The lot is 70,611 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 (all of the lot) · FIRM panel 06041C0457E, 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: $1,545,000 – $1,967,000 · Status: Off market
HUD Small Area FMR (ZIP 94901) · FY 2026
Studio $2,150 · 1BR $2,580 · 2BR $3,120 · 3BR $3,990 · 4BR $4,130
Developments Deserving Closer Investigation & Active Area Builders
- New home (Entitled)0.41 mi W
In "Entitled" for 7 yr (since Nov 26, 2019), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121). High-impact scale (1 housing unit, 1 deed-restricted affordable across 0 permits).
- New home at 195 Fairway Dr (Issued)0.21 mi NE
Active in "Issued" for 5.6 yr (first record Mar 22, 2021) with no new permit activity recorded in 5.5 yr. High-impact scale (1 housing unit, $1,400,000 declared valuation across 1 permit).
- New home at 195 Fairway Dr (Issued)0.21 mi NE
Active in "Issued" for 12.9 yr (first record Dec 26, 2013) with no new permit activity recorded in 10.4 yr. High-impact scale (1 housing unit, $1,636,842 declared valuation across 2 permits).
- New home at 40 Montecito Rd (aka 40a) (Issued)0.24 mi SE
Active in "Issued" for 5.3 yr (first record Jul 16, 2021) with no new permit activity recorded in 3.9 yr. High-impact scale (1 housing unit, $2,515,850 declared valuation across 1 permit).
Entity-resolved builders & contractors in ½ mile: Semper Solaris Construction (4 on parcel, 4 in ½ mi · Solar / battery storage); Hillside Drilling (1 on parcel, 1 in ½ mi · General repair); Sameday Plumbing Heating And Cooling (1 on parcel, 1 in ½ mi · Other); Owner Builder (27 in ½ mi · Remodel / interior alteration); Owner (19 in ½ mi · Remodel / interior alteration).
Permit & Project History on This Parcel (6 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| B47206 | Other | Issued | Iss. Jun 17, 2026 | $22,920 | Replace Mechanical Appliance |
| B36276 | Other | Issued | Iss. Dec 11, 2023 | $67,712 | REVISION ON #B35948 BATTERIES AND IQ COMBINER HAVE BEEN RELOCATED TO INSIDE THE GARAGE. CHANGES MADE ON E2,E8.2, E9.1 |
| B35948 | Solar / battery storage | Issued | Iss. Nov 2, 2023 | $17,498 | ·(21) KWH RATED ENERGY STORAGE SYSTEM, ·(1) 200A ENPHASE IQ SYSTEM CONTROLLER 2, ·(2) ENPHASE IQ BATTERY 10T, · (1) RAPI… |
| B32171 | Solar / battery storage | Issued | Iss. Dec 29, 2022 | $67,712 | installing (N)roof mounted solar photovoltaic system, 11.100 kW DC PV, 30 (N) solar panels, 30 (N) inverters, 1(N) AC Co… |
| B29690 | Roof replacement |