Mill Valley 94941 · Homestead · APN 047-132-19 · Unincorporated Marin
Since October 2024 within ½ mile: 3 homes completed, 7 permitted, 1 proposed or in review; 3 demolitions.
14 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.
253 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.
$2,491,000
Benchmark range: $2,192,000 – $2,790,000
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.
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 Unincorporated Marin'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 R1 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 8.1 yr (first record Sep 19, 2018), with no completion or new permit record in 7.6 yr. · 1 unit · $870,000 declared valuation
Permit issued and active for 8.1 yr (first record Oct 1, 2018), with no completion or new permit record in 7.5 yr. · 1 unit · $780,000 declared valuation
Permit issued and active for 7.4 yr (first record Jun 15, 2019), with no completion or new permit record in 7.4 yr. · 1 unit
Permit issued and active for 7.5 yr (first record May 13, 2019), with no completion or new permit record in 7.2 yr. · $2,600,000 declared valuation
Permit issued and active for 6.7 yr (first record Feb 20, 2020), with no completion or new permit record in 6.7 yr. · 1 unit · $125,000 declared valuation
In "Entitled" for 6.4 yr (since Jun 23, 2020), with no new permit record in 6.4 yr. · 1 unit
Nearby electrical / panel (201 Hawthorne Ave): Description text was updated
Record B48724 · Detected between snapshots
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Snapshot diff within ½ mile
Latest published Zillow Home Value Index (ZHVI) update
Changed from $1,980,059 in September 2025 to $2,181,389 in September 2026.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94941 (not a parcel appraisal)
409 Montford Ave (Adu 409a) · 1 unit · $75,000 valuation
Records span Jul 2, 2026 to Sep 24, 2026 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
200 Chapman Rd (200 A - Adu) · 1 unit · $440,000 valuation
Records span Dec 30, 2025 to Sep 2, 2026 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
351 N Ferndale Ave · $25,000 valuation
Records span May 26, 2026 to Sep 1, 2026 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
328 Melrose Ave (Adu 328a) · 1 unit · $100,000 valuation
Records span Sep 12, 2024 to Aug 26, 2026 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
550 Montford Ave · 1 unit · $175,000 valuation
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
375 N Ferndale Ave · $5,000 valuation
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Annual ZIP 94941 home-value index checkpoint
Changed from $2,042,452 in September 2024 to $1,980,059 in September 2025.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94941 (not a parcel appraisal)
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
408 Laverne Ave (Adu 408a) · 1 unit · $2,700,000 valuation
Records span Jul 12, 2024 to Aug 29, 2025 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
305 Montford Ave · $50,000 valuation
Records span Jun 27, 2025 to Jul 25, 2025 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
1 housing unit completed (178994)
Reported in 2025 Housing Element Annual Progress Report
ADU · Renter
Source: California HCD, Housing Element Annual Progress Report — Table A2 · Geography: parcel
158 Linden Ln (Adu 158a) · 1 unit · $200,000 valuation
Records span Jul 22, 2024 to Apr 18, 2025 (1 permit).
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 Unincorporated Marin development graph →Active in "Issued" for 8.1 yr (first record Sep 19, 2018) with no new permit activity recorded in 7.6 yr. High-impact scale (1 housing unit, $870,000 declared valuation across 1 permit).
Active in "Issued" for 7.5 yr (first record May 13, 2019) with no new permit activity recorded in 7.2 yr. High-impact scale ($2,600,000 declared valuation across 2 permits).
Active in "Issued" for 2.3 yr (first record Jul 12, 2024) with no new permit activity recorded in 14 mo. High-impact scale (1 housing unit, $2,700,000 declared valuation across 1 permit).
Active in "Issued" for 8.5 yr (first record Apr 23, 2018) with no new permit activity recorded in 3.7 yr. High-impact scale (1 housing unit, $1,100,000 declared valuation across 1 permit).
Active in "Issued" for 3.9 yr (first record Dec 15, 2022) with no new permit activity recorded in 2.5 yr. High-impact scale (1 housing unit, $1,375,000 declared valuation across 1 permit).
Active in "Entitled" for 6.2 yr (first record Aug 11, 2020) with no new permit activity recorded in 6.2 yr. High-impact scale (1 housing unit, 1 deed-restricted affordable across 0 permits).
Substantial improvements (additions, interior remodels, ADUs, commercial TI, and new builds) across 1,063 parcels
+0.0% YoY
City baseline: 16.5 / 1k
22 in trailing 24m
Includes 10 ADUs
HUD Small Area Fair Market Rent · ZIP 94941
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 ($24,900/yr) + local voter-approved bond debt ($3,735/yr) + fixed direct levies/Mello-Roos ($450/yr).
Mapped hazard zone insurance context on this parcel:
−$146,787/yr
Cash needed: $547,800
NOI: $4,303/yr
P&I: $12,591/mo
For $0/mo net cash flow
At $3,950/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 | $3,634/mo | −$12,686/mo | -27.8% | $21,342/mo | −$12,752/mo |
| Base (your inputs) | Your entered assumptions, 3.0%/yr rent growth | $3,950/mo | −$12,232/mo | -26.8% | $19,754/mo | −$12,074/mo |
| Optimistic (cap-limited) | +6% starting rent, 3% vacancy, 4.5%/yr rent growth (capped by AB 1482 ceiling of 8.6%/yr) | $4,187/mo | −$11,972/mo | -26.2% | $19,295/mo | −$11,558/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.
Finaled / completed1 unitsJan 22, 2025 – Apr 9, 2025
Issued1 unitsSep 19, 2018 – Apr 8, 2019
We group related permits and State housing reports into projects. That grouping is our inference, not an official record.
Addition & Remodel Of Part Of House To Create A D U
Outdoor Kitchen, Issue With #88970
Pool; Retaining Wall, Issue With #89120
Install a 17 SEER, 2 stage Air Conditioner and a zone system — Mechanical Appliance
7.82kw Rooftop Photovoltaic & Energy Storage System
Ret Wall Per Ld
New S F D , Covered Porch
Furnace
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 | —(178994) | ADU · Renter | — | 1 (Apr 9, 2025) | 1 (Jun 20, 2025) | — |
| 2019 | —(161203) | SFD · Owner | — | 1 (Apr 8, 2019) | — | — |
Source: California HCD, Housing Element Annual Progress Report — Table A2 · Geography: project (parcel) · Retrieved Oct 26, 2026 · From Unincorporated Marin'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
0.20 acres
Assessor's classification for assessment purposes. This is not zoning.
306A HOLLY ST; 306 HOLLY ST
Source: County of Marin GIS (MarinMap), Parcels · Geography: parcel · Retrieved Oct 31, 2026
Search by parcel number 047-132-19. Assessed value is not market value.
Search by parcel number 047-132-19 (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.