80 Century Dr
Mill Valley 94941 · Strawberry · Unincorporated Marin · Coordinates: 37.87798, -122.49822
Executive Verdict · Public-Records Synthesis
Zoned RSP-5-BFC in Unincorporated Marin with likely ADU & SB 9 infill eligibility and zero mapped flood, fire, or fault hazard overlaps; benchmark value $2,343,000 ($2,062,000–$2,624,000).
Upsides & Opportunities
- ✓ ADU & SB 9 infill pathways screen as likely eligible
Zoned RSP-5-BFC supports ministerial ADU/JADU review plus SB 9 both two-unit development and ministerial urban lot split on a 19,907 sq ft lot.
Source: Unincorporated Marin zoning · CA Gov. Code 66314 & 65852.21
- ✓ Documented permitted upgrades (+$11,560 contributory est.)
Public building records show issued construction/renovation work on this parcel (6 total permits, latest Sep 20, 2018).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (parcel APN)
- ✓ Above-average reinvestment in Strawberry
43 substantial renovation & housing permits over 24 months (28.4 per 1,000 parcels vs. 16.4 citywide baseline) (#1 of 22 neighborhoods).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (Strawberry)
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 (158878): Issued after 2 mo — above the 75th percentile for other permits in Unincorporated Marin (median 0d, 75th pct 1d, n=1,560).
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 7 Charles Van Damme Dock (0.45 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)
- ! Year 1 Prop 13 tax reset (~$27,395/yr at $2,343,000)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$2,283/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:
- 19,907 sq ft (0.46 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 80 CENTURY DR
Zoning & Land Use
RSP-5-BFC — Residential Single Family Planned (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned RSP-5-BFC (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned RSP-5-BFC, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned RSP-5-BFC, a single-family residential zone. The lot is 19,907 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 06041C0488E, 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: $2,062,000 – $2,624,000 · 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
- New home at 7 Charles Van Damme Dock (Issued)0.45 mi SW
Active in "Issued" for 9.3 yr (first record Aug 1, 2017) with no new permit activity recorded in 7.2 yr. High-impact scale (1 housing unit, 1 deed-restricted affordable, $110,000 declared valuation across 1 permit).
- Other (158878) (Issued)On this parcel
Issued after 2 mo — above the 75th percentile for other permits in Unincorporated Marin (median 0d, 75th pct 1d, n=1,560).
- New home (Entitled)0.32 mi NW
In "Entitled" for 5.1 yr (since Sep 30, 2021), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
- New home at 61 Liberty Dock (Applied)0.34 mi SW
In "Applied" for 11.5 yr (since May 6, 2015), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
Entity-resolved builders & contractors in ½ mile: Tom Lee Roofing (1 on parcel, 1 in ½ mi · Roof replacement); Forsythe General Contractors (1 on parcel, 1 in ½ mi · Other); Forsyth Construction (1 on parcel, 1 in ½ mi · New garage / accessory structure); Owner Builder (35 in ½ mi · Remodel / interior alteration); Lek Enterprises (29 in ½ mi · Remodel / interior alteration).
Permit & Project History on This Parcel (6 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 159635 | New garage / accessory structure | Issued | Iss. Sep 20, 2018 | $8,000 | New Canopy***Expired Prepared For Imaging/Scanning 04/07/20 Mv |
| 158878 | Other | Issued | Iss. Jun 25, 2018 | $15,000 | Stairs |
| 158659 | Solar / battery storage | Issued | Iss. Jun 4, 2018 | $8,000 | Battery Back Up |
| 158658 | Solar / battery storage | Issued | Iss. Jun 4, 2018 | $20,000 | Pv 9.05 Kw |
| B14382 | Roof replacement | Issued | Iss. Feb 22, 2018 | $45,500 | Remove existing 8 low-sloped roofs to wood sheathing and reroof using Certainteed Flintlastic SA Modified Bitumen membra… |