19 Sunnyside Dr
Inverness 94956 · Inverness · Unincorporated Marin · Coordinates: 38.07520, -122.83985
Executive Verdict · Public-Records Synthesis
Zoned C-RSP-0.25 in Unincorporated Marin with likely ADU & SB 9 infill eligibility and mapped CAL FIRE high fire hazard severity zone (state responsibility area) due diligence; benchmark value $2,071,000 ($1,822,000–$2,320,000).
Upsides & Opportunities
- ✓ ADU & SB 9 infill pathways screen as likely eligible
Zoned C-RSP-0.25 supports ministerial ADU/JADU review plus SB 9 both two-unit development and ministerial urban lot split on a 87,512 sq ft lot. Local precedent is active with 1 ADU permit within ¼ mile over the last 36 months.
Source: Unincorporated Marin zoning · CA Gov. Code 66314 & 65852.21
- ✓ Documented permitted upgrades (+$239,200 contributory est.)
Public building records show issued construction/renovation work on this parcel (4 total permits, latest Aug 13, 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 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)
- ! Delayed or open permit activity on this parcel
Accessory dwelling unit at 19 Sunnyside Dr: Active in "Issued" for 2.7 yr (first record Feb 29, 2024) with no new permit activity recorded in 2.3 yr.
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 home at 372 Drakes View Dr (0.42 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:
- 87,512 sq ft (2.01 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 19 SUNNYSIDE DR; 21 SUNNYSIDE DR
Zoning & Land Use
C-RSP-0.25 — Residential Single Family Planned (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned C-RSP-0.25 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned C-RSP-0.25, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned C-RSP-0.25, a single-family residential zone. The lot is 87,512 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
- 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 06041C0229E, effective August 15, 2017
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $1,822,000 – $2,320,000 · Status: Off market
HUD Small Area FMR (ZIP 94956) · FY 2026
Studio $2,050 · 1BR $2,510 · 2BR $2,990 · 3BR $3,730 · 4BR $3,960
Developments Deserving Closer Investigation & Active Area Builders
- Accessory dwelling unit at 19 Sunnyside Dr (Issued)On this parcel
Active in "Issued" for 2.7 yr (first record Feb 29, 2024) with no new permit activity recorded in 2.3 yr.
- New home at 21 Sunnyside Dr (aka 19) (Issued)On this parcel
Active in "Issued" for 3.9 yr (first record Dec 1, 2022) with no new permit activity recorded in 3.2 yr.
- New home at 372 Drakes View Dr (Issued)0.42 mi W
Active in "Issued" for 5.1 yr (first record Oct 1, 2021) with no new permit activity recorded in 3.2 yr. High-impact scale (1 housing unit, $800,000 declared valuation across 1 permit).
- New home at 29 Drakes View Dr (Issued)0.25 mi E
Active in "Issued" for 9.1 yr (first record Sep 19, 2017) with no new permit activity recorded in 8.9 yr.
Entity-resolved builders & contractors in ½ mile: Owner Builder (2 on parcel, 3 in ½ mi · New single-family home); Wedge Roofing (1 on parcel, 1 in ½ mi · Roof replacement); Pac Solar (1 on parcel, 1 in ½ mi · Other); Sawyer Construction (4 in ½ mi · New garage / accessory structure); Arrow Construction And Remodeling (3 in ½ mi · Addition (adds square footage)).
Permit & Project History on This Parcel (4 permits, 2 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| B47883 | Roof replacement | Issued | Iss. Aug 13, 2026 | $25,200 | ReRoofing; With Electronic Inspection |
| B45749 | Other | Issued | Iss. Feb 4, 2026 | $19,000 | — |
| 177178 | Accessory dwelling unit (new or conversion) | Issued | Iss. Jul 24, 2024 | $240,000 | (N) Detached A D U; Decks |
| 174833 | New single-family home |