33 Park Ave
Dillon Beach 94929 · Dillon Beach · Unincorporated Marin · Coordinates: 38.25060, -122.96503
Executive Verdict · Public-Records Synthesis
Zoned C-R1-BD in Unincorporated Marin with likely ADU & SB 9 infill eligibility and mapped CAL FIRE moderate fire hazard severity zone (state responsibility area) due diligence; benchmark value $1,301,000 ($1,145,000–$1,457,000).
Upsides & Opportunities
- ✓ ADU & SB 9 infill pathways screen as likely eligible
Zoned C-R1-BD supports ministerial ADU/JADU review plus SB 9 two-unit residential development on a 1,699 sq ft lot.
Source: Unincorporated Marin zoning · CA Gov. Code 66314 & 65852.21
- ✓ Documented permitted upgrades (+$7,128 contributory est.)
Public building records show issued construction/renovation work on this parcel (6 total permits, latest Feb 15, 2022).
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 (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
New garage / accessory structure (86955): Pending in review for 6 yr (13.3× the 164d median) — slower than 90% of new garage / accessory structure permits in Unincorporated Marin (median 164d, 90th pct 485d, n=356).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (review-time benchmark)
- ! 4 slow or stalled nearby projects within ½ mile
Closest lead: New home at 40 Sea Bluff (0.14 mi 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)
Parcel & Assessor
- Lot size:
- 1,699 sq ft (0.04 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 33 PARK AVE
Zoning & Land Use
C-R1-BD — Residential Single Family (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned C-R1-BD (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned C-R1-BD, a single-family residential zone.
- SB 9: split into two lotsUnlikely
Zoned C-R1-BD, a single-family residential zone. The lot is 1,699 sq ft by the assessor; a split needs at least 2,400 sq ft (two lots of 1,200 sq ft or more).
Mapped Hazard Zones on This Lot
- CAL FIRE Fire Hazard Severity Zone
- Moderate 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 06041C0040E, 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: $1,145,000 – $1,457,000 · Status: Off market
HUD Small Area FMR (ZIP 94929) · FY 2026
Studio $2,050 · 1BR $2,510 · 2BR $2,990 · 3BR $4,010 · 4BR $4,280
Developments Deserving Closer Investigation & Active Area Builders
- New garage / accessory structure (86955) (Applied)On this parcel
Pending in review for 6 yr (13.3× the 164d median) — slower than 90% of new garage / accessory structure permits in Unincorporated Marin (median 164d, 90th pct 485d, n=356).
- Demolition (70571) (Applied)On this parcel
Pending in review for 12.6 yr (83.4× the 55d median) — slower than 90% of demolition permits in Unincorporated Marin (median 55d, 90th pct 261d, n=130).
- New home at 40 Sea Bluff (Issued)0.14 mi SW
Active in "Issued" for 3.4 yr (first record Jun 2, 2023) with no new permit activity recorded in 3.1 yr. High-impact scale (1 housing unit, $1,600,000 declared valuation across 1 permit).
- New home at 20 Sea Bluff (Issued)0.14 mi SW
Active in "Issued" for 3.5 yr (first record May 16, 2023) with no new permit activity recorded in 3.2 yr. High-impact scale (1 housing unit, $1,420,000 declared valuation across 1 permit).
Entity-resolved builders & contractors in ½ mile: Owner Builder (1 on parcel, 17 in ½ mi · Remodel / interior alteration); North Bay Solar Electric (1 on parcel, 1 in ½ mi · Solar / battery storage); Gary Hansen Electric (1 on parcel, 1 in ½ mi · Electrical / panel); Owner (9 in ½ mi · New garage / accessory structure); Roseberry Construction (5 in ½ mi · New garage / accessory structure).
Permit & Project History on This Parcel (6 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 170662 | Remodel / interior alteration | Issued | Iss. Feb 15, 2022 | — | Ceiling Altered At Living Room Addendum To Permit #165933 T.D. 1/14/22 |
| 167962 | Solar / battery storage | Issued | Iss. Apr 28, 2021 | $19,800 | 5.95 Kw Rooftop Photovoltaic |
| B24759 | Electrical / panel | Issued | Iss. Feb 1, 2021 | $3,000 | Change out arcing zinsco panel, upgrade to 200 amp meter main with distribution panel. Land two ground rods, bond hot an… |
| 86955 | New garage / accessory structure | Applied | App. Nov 17, 2020 | $8,000 | Rebld Garage |
| 165933 | New garage / accessory structure | Issued | Iss. Oct 8, 2020 |