208 Mark Twain Ave
San Rafael 94903 · Santa Venetia · Unincorporated Marin · Coordinates: 38.00471, -122.52476
Parcel & Assessor
- Lot size:
- 7,449 sq ft (0.17 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 208 MARK TWAIN AVE
Zoning & Land Use
R1 — Residential Single Family (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned R1 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned R1, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned R1, a single-family residential zone. The lot is 7,449 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 (about 96% of the lot); Zone X: 0.2% annual chance flood hazard (shaded X) (about 4% of the lot) · FIRM panel 06041C0294E, 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: $1,045,000 – $1,331,000 · Status: Off market
HUD Small Area FMR (ZIP 94903) · FY 2026
Studio $2,880 · 1BR $3,450 · 2BR $4,180 · 3BR $5,340 · 4BR $5,530
Developments Deserving Closer Investigation & Active Area Builders
- Demolition at 208 Mark Twain Ave (Issued)On this parcel
Active in "Issued" for 2.1 yr (first record Sep 30, 2024) with no new permit activity recorded in 2 yr.
- New commercial building at 170 N San Pedro Rd (Issued)0.37 mi S
Active in "Issued" for 4.9 yr (first record Dec 1, 2021) with no new permit activity recorded in 4.3 yr. High-impact scale ($18,000,000 declared valuation across 1 permit).
- New home at 16 Crestview Way (Issued)0.44 mi NE
Active in "Issued" for 2.4 yr (first record May 20, 2024) with no new permit activity recorded in 14 mo. High-impact scale (1 housing unit, $770,000 declared valuation across 1 permit).
- New commercial building at 10 Ave Of The Flags (Issued)0.5 mi W
Active in "Issued" for 5.6 yr (first record Mar 26, 2021) with no new permit activity recorded in 5.5 yr. High-impact scale ($2,000,000 declared valuation across 1 permit).
Permit & Project History on This Parcel (2 permits, 1 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 93826 | Addition (adds square footage) | Applied | App. Dec 18, 2025 | $400,000 | Repair And Renovation Of Garage, Laundry Room, Kitchen, Bathroom, And Bedroom. Addition Of New Primary Suite And Patio A… |
| 178035 | Demolition | Issued | Iss. Nov 5, 2024 | $4,934 | Interior Demo Only - Remove All Drywall Due To Fire Damage |