226 Julia Ave
Mill Valley 94941 · Almonte · Unincorporated Marin · Coordinates: 37.88499, -122.52775
Executive Verdict · Public-Records Synthesis
Zoned R1-B1 in Unincorporated Marin with likely ADU & SB 9 infill eligibility and zero mapped flood, fire, or fault hazard overlaps; benchmark value $2,195,000 ($1,932,000–$2,458,000).
Upsides & Opportunities
- ✓ ADU & SB 9 infill pathways screen as likely eligible
Zoned R1-B1 supports ministerial ADU/JADU review plus SB 9 both two-unit development and ministerial urban lot split on a 11,587 sq ft lot. Local precedent is active with 6 ADU permits within ¼ mile over the last 36 months.
Source: Unincorporated Marin zoning · CA Gov. Code 66314 & 65852.21
- ✓ Documented permitted upgrades (+$5,670 contributory est.)
Public building records show issued construction/renovation work on this parcel (7 total permits, latest Jan 8, 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)
- ! Delayed or open permit activity on this parcel
Other (93912): Pending in review for 10 mo — slower than 90% of other permits in Unincorporated Marin (median 0d, 90th pct 71d, n=1,562).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (review-time benchmark)
- ! 5 slow or stalled nearby projects within ½ mile
Closest lead: New home at 217 Cleveland Ave (140 ft 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)
- ! Year 1 Prop 13 tax reset (~$25,693/yr at $2,195,000)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$2,141/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:
- 11,587 sq ft (0.27 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 226 JULIA AVE
Zoning & Land Use
R1-B1 — Residential Single Family (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned R1-B1 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned R1-B1, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned R1-B1, a single-family residential zone. The lot is 11,587 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 06041C0469F, 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: $1,932,000 – $2,458,000 · Status: Off market
HUD Small Area FMR (ZIP 94941) · FY 2026
Studio $2,730 · 1BR $3,270 · 2BR $3,960 · 3BR $5,060 · 4BR $5,240
Developments Deserving Closer Investigation & Active Area Builders
- Other (93912) (Applied)On this parcel
Pending in review for 10 mo — slower than 90% of other permits in Unincorporated Marin (median 0d, 90th pct 71d, n=1,562).
- New home at 217 Cleveland Ave (Issued)140 ft W
Active in "Issued" for 9.7 yr (first record Feb 21, 2017) with no new permit activity recorded in 2.3 yr. High-impact scale (1 housing unit, $875,000 declared valuation across 1 permit).
- Accessory dwelling unit at 131 Yale Ave A (Issued)0.21 mi N
Active in "Issued" for 4.8 yr (first record Jan 19, 2022) with no new permit activity recorded in 3.4 yr. High-impact scale (1 housing unit, $1,000,000 declared valuation across 1 permit).
- New home at 125 Morning Sun Ave (Issued)0.29 mi N
Active in "Issued" for 8.1 yr (first record Oct 15, 2018) with no new permit activity recorded in 7.8 yr. High-impact scale (1 housing unit, $900,000 declared valuation across 3 permits).
Entity-resolved builders & contractors in ½ mile: Tina Paul Carrasco Electric (1 on parcel, 1 in ½ mi · HVAC / heat pump); Pac Solar (1 on parcel, 1 in ½ mi · Solar / battery storage); Moore Services (1 on parcel, 1 in ½ mi · HVAC / heat pump); Tomtech (1 on parcel, 1 in ½ mi · EV charger); Owner Builder (86 in ½ mi · Remodel / interior alteration).
Permit & Project History on This Parcel (7 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 93912 | Other | Applied | App. Jan 8, 2026 | — | Spa |
| 93911 | General repair | Applied | App. Jan 8, 2026 | — | Retaining Walls |
| 93753 | Pool / spa | Applied | App. Dec 1, 2025 | — | Retaining Wall, Deck, Hot Tub, Stairs, Guardrails, Landscaping |
| B44249 | HVAC / heat pump | Issued | Iss. Oct 8, 2025 | $23,100 | Install: (1) Tesla Powerwall 3 Total Energy=13.5Kwh; (1) Tesla Powerwall 3 Expansion Total Energy=13.5Kwh; (1) Tesla Met… |
| B32247 | EV charger | Issued | Iss. Jan 11, 2023 | $750 |