Ross 94957 · APN 073-231-24 · Ross
Since October 2024 within ½ mile: 7 permitted, 5 proposed or in review.
12 projects with a record in this window, grouped by us from permits and State housing reports. Units are as proposed on each project's latest record and counted at its current stage.
41 permits within ½ mile since October 2024
The map shows new construction, ADUs, demolitions, additions, and renovations. Routine systems work (roofs, HVAC, water heaters) is counted but not mapped. Unit counts are as stated on permits.
$4,658,000
Benchmark range: $3,959,000 – $5,357,000
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: permits located by parcel, ½ mile radius · Retrieved Oct 31, 2026
Public-records benchmark estimate combining Zillow Home Value Index (Data provided by Zillow), Census ACS 5-year estimates, parcel land-use/lot characteristics, and issued building permits. Not an official appraisal.
We don't have building permits for Ross, so we can't show what has been permitted nearby.
Permit counts, by the date issued (or applied, if not yet issued). Lot splits are planning cases, which we don't have.
We read public zoning and hazard maps against state law (ADUs: Gov. Code 66314; SB 9: Gov. Code 65852.21 and 66411.7). Local rules, title, tenancy history and site conditions can change the answer. Check with Ross's planning department before relying on it.
Sources: County of Marin GIS (MarinMap), Zoning (11 cities and unincorporated Marin) (retrieved Oct 31, 2026) · CAL FIRE Office of the State Fire Marshal, Fire Hazard Severity Zones in the State Responsibility Area (effective 2024-04-01) (retrieved Oct 26, 2026) · CAL FIRE Office of the State Fire Marshal, Fire Hazard Severity Zones in the Local Responsibility Area (map dated 2025-03-24) (retrieved Oct 26, 2026) · FEMA, National Flood Hazard Layer — flood hazard zones (retrieved Oct 26, 2026) · FEMA, National Flood Hazard Layer — FIRM panels (retrieved Oct 26, 2026) · California Geological Survey, Alquist-Priolo Earthquake Fault Zones (retrieved Oct 26, 2026) · Zoning classes: our classification of R-1_B-6 as single-family residential, checked against the zone description on Oct 24, 2026
Chronological history of building permit applications and issuances, snapshot-dated status changes, State housing entitlements, surrounding development within ½ mile, and area home-value trends.
Permit issued and active for 7.5 yr (first record May 8, 2019), with no completion or new permit record in 7.4 yr. · $70,000 declared valuation
Permit issued and active for 7.4 yr (first record Jun 18, 2019), with no completion or new permit record in 7.3 yr. · 1 unit · $44,000 declared valuation
Permit issued and active for 5 yr (first record Oct 15, 2021), with no completion or new permit record in 5 yr. · 1 unit
Permit issued and active for 4.9 yr (first record Nov 19, 2021), with no completion or new permit record in 4.9 yr. · 1 unit
Permit issued and active for 4.4 yr (first record Jun 16, 2022), with no completion or new permit record in 4.4 yr. · 1 unit
Permit issued and active for 4.1 yr (first record Sep 8, 2022), with no completion or new permit record in 4.1 yr. · 1 unit
Latest published Zillow Home Value Index (ZHVI) update
Changed from $3,952,811 in September 2025 to $4,347,413 in September 2026.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94957 (not a parcel appraisal)
40 Rock Rd (Adu 40a) · 1 unit · $40,420 valuation
Records span Jul 3, 2025 to Mar 25, 2026 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
1 unit
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
1 unit
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Annual ZIP 94957 home-value index checkpoint
Changed from $3,924,850 in September 2024 to $3,952,811 in September 2025.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94957 (not a parcel appraisal)
1 unit
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
1 unit
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Building permit reported to State HCD for 1 housing unit (12 Woodside Way)
Reported in 2025 Housing Element Annual Progress Report
ADU · Owner
Source: California HCD, Housing Element Annual Progress Report — Table A2 · Geography: parcel
75 Rock Rd · 1 unit · $936,400 valuation
Records span Aug 27, 2024 to May 20, 2025 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
1 unit
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Planning entitlement approved for 1 housing unit (12 Woodside Way)
Reported in 2025 Housing Element Annual Progress Report
ADU · Owner
Source: California HCD, Housing Element Annual Progress Report — Table A2 · Geography: parcel
1 unit
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
1 unit
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
1 unit
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
1 unit
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Cross-referenced intelligence from our historical development graph—connecting parcels, permits, entity-resolved builders, empirical review-time distributions, and neighborhood renovation trends.
Explore full Ross development graph →Active in "Issued" for 18 mo (first record Apr 28, 2025) with no new permit activity recorded in 18 mo.
Active in "Issued" for 3.7 yr (first record Feb 28, 2023) with no new permit activity recorded in 3.7 yr. High-impact scale (1 housing unit, 1 deed-restricted affordable across 0 permits).
Active in "Issued" for 2.2 yr (first record Aug 27, 2024) with no new permit activity recorded in 17 mo. High-impact scale (1 housing unit, $936,400 declared valuation across 1 permit).
Active in "Entitled" for 2.3 yr (first record Jul 16, 2024) with no new permit activity recorded in 2.3 yr.
Active in "Entitled" for 13 mo (first record Sep 17, 2025) with no new permit activity recorded in 13 mo.
Active in "Issued" for 2.7 yr (first record Mar 1, 2024) with no new permit activity recorded in 2.7 yr.
HUD Small Area Fair Market Rent · ZIP 94957
HUD FY 2026 · 40th-percentile gross rentCensus ACS 5-year median gross rent (all bedroom counts combined):
Area home-value benchmarks (not an appraisal)
ZIP & neighborhood mediansUnder California Proposition 13, the seller's historical assessed value does not carry over to a buyer. On sale, the parcel is reassessed at the purchase price: 1.00% base rate ($46,600/yr) + local voter-approved bond debt ($6,990/yr) + fixed direct levies/Mello-Roos ($450/yr).
Mapped hazard zone insurance context on this parcel:
−$298,306/yr
Cash needed: $1,025,200
NOI: -$15,544/yr
P&I: $23,563/mo
For $0/mo net cash flow
At $4,500/mo rent
| Scenario | Assumptions | Year 1 Rent | Year 1 Cash Flow | Cash-on-Cash | Break-Even Rent | Year 5 Cash Flow |
|---|---|---|---|---|---|---|
| Conservative | −8% starting rent, +3% vacancy, +3% combined maintenance/CapEx, 1.5%/yr rent growth | $4,140/mo | −$25,376/mo | -29.7% | $39,561/mo | −$25,591/mo |
| Base (your inputs) | Your entered assumptions, 3.0%/yr rent growth | $4,500/mo | −$24,859/mo | -29.1% | $36,617/mo | −$24,818/mo |
| Optimistic (cap-limited) | +6% starting rent, 3% vacancy, 4.5%/yr rent growth (capped by AB 1482 ceiling of 8.6%/yr) | $4,770/mo | −$24,562/mo | -28.7% | $35,767/mo | −$24,231/mo |
Rental regulatory context (informational only — not legal advice):
California AB 1482 (Tenant Protection Act, Civ. Code § 1947.12) caps annual rent increases at 5% + local CPI (max 10%) on covered properties.
Issued1 unitsApr 28, 2025 – Apr 28, 2025
We group related permits and State housing reports into projects. That grouping is our inference, not an official record.
No building permits are recorded for this parcel since 2016.
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel (APN) · Retrieved Oct 31, 2026 · Received and issued dates come from the County of Marin. The county publishes no final or expired status, so an issued permit stays 'Issued' after the work is done.
| Report year | Project / record | Type | Entitled | Permitted | Completed | Deed-restricted |
|---|---|---|---|---|---|---|
| 2025 | 12 Woodside Way(ADU05) | ADU · Owner | 1 (Apr 28, 2025) | 1 (Jun 4, 2025) | — | — |
Source: California HCD, Housing Element Annual Progress Report — Table A2 · Geography: project (parcel) · Retrieved Oct 26, 2026 · From Ross's Housing Element Annual Progress Reports. A project can appear in several report years as it moves from entitlement to permit to completion.
Source: County of Marin GIS (MarinMap), Zoning (11 cities and unincorporated Marin) · Geography: zoning district polygon at parcel point · Retrieved Oct 31, 2026
0.34 acres
Assessor's classification for assessment purposes. This is not zoning.
12 WOODSIDE WAY
Source: County of Marin GIS (MarinMap), Parcels · Geography: parcel · Retrieved Oct 31, 2026
Search by parcel number 073-231-24. Assessed value is not market value.
Search by parcel number 073-231-24 (Marin County Tax Collector)
Permits issued in unincorporated Marin in the past 48 months. Each city keeps its own records.
The official flood hazard map for this location. Our reading of it is under What could be built here.
This site does not show owner names.