98 Sunnyside Ave
Mill Valley 94941 · Mill Valley · Coordinates: 37.90584, -122.54305
Parcel & Assessor
- Lot size:
- 6,229 sq ft (0.14 ac)
- Assessor use:
- Multiple-Resid. - Improved
- Addresses on lot:
- 98 SUNNYSIDE AVE; 98 SUNNYSIDE AVE UNIT A; 98 SUNNYSIDE AVE UNIT B
Zoning & Land Use
RS-6 — Single Fam Res (min 6,000 SF) (Mill Valley)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned RS-6 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned RS-6, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned RS-6, a single-family residential zone. The lot is 6,229 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 (Local Responsibility Area) (all of the lot, map Mar 24, 2025)
- FEMA National Flood Hazard Layer
- Zone X: minimal flood hazard (all of the lot) · FIRM panel 06041C0468F, 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: $1,860,000 – $2,516,000 · 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
Nearby Activity (½ mile radius, since October 2024)
16 active or recent development projects (20 housing units across completed, permitted, and pipeline stages) and 28 total building permits recorded within ½ mile.
Developments Deserving Closer Investigation & Active Area Builders
- ADU Conversion (Issued)On this parcel
Active in "Issued" for 3.5 yr (first record Apr 13, 2023) with no new permit activity recorded in 3.5 yr.
- MFR/Office Overlay (Entitled)0.19 mi W
Active in "Entitled" for 13 mo (first record Oct 13, 2025) with no new permit activity recorded in 13 mo. High-impact scale (5 housing units across 0 permits).
- ADU Conversion (Entitled)110 ft NW
Active in "Entitled" for 4.5 yr (first record Apr 26, 2022) with no new permit activity recorded in 4.5 yr.
- Attached ADU (Issued)240 ft E
Active in "Issued" for 20 mo (first record Mar 13, 2025) with no new permit activity recorded in 20 mo.
Permit & Project History on This Parcel (0 permits, 1 grouped projects)
No building permits recorded on this parcel in our dataset.
State HCD Housing Element APR records on this parcel: 1 entry (report years 2023).