Mill Valley 94941 · Strawberry · APN 043-224-23 · Unincorporated Marin
Since October 2024 within ½ mile: 5 permitted, 3 proposed or in review; 3 demolitions.
11 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.
274 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.
$2,260,000
Benchmark range: $1,989,000 – $2,531,000
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-B2 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 12.1 yr (first record Oct 2, 2014), with no completion or new permit record in 11.1 yr. · 1 unit · $631,507 declared valuation
In "Applied" for 2 yr (since Oct 31, 2024), with no new permit record in 2 yr. · 1 unit · $350,000 declared valuation
Permit issued and active for 12.4 yr (first record May 20, 2014), with no completion or new permit record in 12.4 yr. · $2,000 declared valuation
Permit issued and active for 12.2 yr (first record Aug 7, 2014), with no completion or new permit record in 12.1 yr. · 1 unit · $1,000,000 declared valuation
Permit issued and active for 11.4 yr (first record Jun 15, 2015), with no completion or new permit record in 11 yr. · $250,000 declared valuation
Permit issued and active for 9.6 yr (first record Mar 21, 2017), with no completion or new permit record in 9.6 yr. · $10,280 declared valuation
Nearby remodel / interior alteration (263 Richardson Dr): No longer present in latest agency feed
Record 94402 · Detected between snapshots
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Snapshot diff within ½ mile
Nearby remodel / interior alteration (263 Richardson Dr): First appeared in published agency feed
Record 182821 · Detected between snapshots
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Snapshot diff within ½ mile
Nearby commercial tenant improvement (201 Seminary Dr (Building 3)): Description text was updated
Record 94586 · Detected between snapshots
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Snapshot diff within ½ mile
Nearby ev charger (50 Milland Dr): First appeared in published agency feed
Record B48886 · Detected between snapshots
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Snapshot diff within ½ mile
427 E Strawberry Dr · 1 unit · $225,000 valuation
Records span Jun 18, 2026 to Oct 20, 2026 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project 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)
300 Storer Dr · $235,000 valuation
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
431 E Strawberry Dr · 1 unit · $400,000 valuation
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
107 Inez Pl · 1 unit · $620,000 valuation
Records span Aug 27, 2025 to Apr 3, 2026 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
201 Seminary Dr · $125,000 valuation
Records span Aug 22, 2025 to Jan 28, 2026 (2 permits).
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)
101 Neider Ln (Adu 101a) · 1 unit · $300,000 valuation
Records span Apr 23, 2025 to Sep 19, 2025 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
153 Richardson Dr (Adu 153a) · 1 unit · $1,493,000 valuation
Records span Jun 5, 2023 to Jul 7, 2025 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
153 Richardson Dr · $50,000 valuation
Records span Jan 22, 2025 to Apr 8, 2025 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Accessory dwelling unit (new or conversion) permit application filed (92744)
Current status: Applied
New Detached A D U; Covered Porch, Mechanical Closet · Declared valuation: $350,000
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
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 "Applied" for 2 yr (first record Oct 31, 2024) with no new permit activity recorded in 2 yr.
Active in "Issued" for 12.1 yr (first record Oct 2, 2014) with no new permit activity recorded in 11.1 yr.
Active in "Applied" for 6.5 yr (first record Apr 30, 2020) with no new permit activity recorded in 6.5 yr. High-impact scale (1 housing unit, $850,000 declared valuation across 1 permit).
Active in "Issued" for 12.2 yr (first record Aug 7, 2014) with no new permit activity recorded in 12.1 yr. High-impact scale (1 housing unit, $1,000,000 declared valuation across 1 permit).
Active in "Issued" for 3.4 yr (first record Jun 5, 2023) with no new permit activity recorded in 16 mo. High-impact scale (1 housing unit, $1,493,000 declared valuation across 1 permit).
Active in "Applied" for 8.1 yr (first record Oct 3, 2018) with no new permit activity recorded in 8.1 yr. High-impact scale ($1,600,000 declared valuation across 1 permit).
Substantial improvements (additions, interior remodels, ADUs, commercial TI, and new builds) across 1,512 parcels
+33.3% YoY
City baseline: 16.5 / 1k
42 in trailing 24m
Includes 8 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 ($22,600/yr) + local voter-approved bond debt ($3,390/yr) + fixed direct levies/Mello-Roos ($450/yr).
Insurance & hazard context:
−$128,866/yr
Cash needed: $497,200
NOI: $8,268/yr
P&I: $11,428/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 | −$11,193/mo | -27.0% | $19,258/mo | −$11,229/mo |
| Base (your inputs) | Your entered assumptions, 3.0%/yr rent growth | $3,950/mo | −$10,739/mo | -25.9% | $17,824/mo | −$10,551/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 | −$10,478/mo | -25.3% | $17,411/mo | −$10,035/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.
Applied1 unitsOct 31, 2024 – Oct 31, 2024
Issued1 unitsOct 2, 2014 – Sep 28, 2015
We group related permits and State housing reports into projects. That grouping is our inference, not an official record.
New Detached A D U; Covered Porch, Mechanical Closet
Installing 26 Roof Mounted Solar panels. 11.310kW.
Decks, Stairs, Balcony & Electrical T.D. 3/14/19
7.980kw Roof Mount Photovoltaic - Express - E-Inspection***Expired
Demo & Rebuild Single Family Dwelling (Pre-Fabricated House)
Demolish (E) House On Property - J# 4k916
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.
No housing activity reported to the State for this parcel (2018–2025 reports).
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
0.27 acres
Assessor's classification for assessment purposes. This is not zoning.
315 RICHARDSON DR
Source: County of Marin GIS (MarinMap), Parcels · Geography: parcel · Retrieved Oct 31, 2026
Search by parcel number 043-224-23. Assessed value is not market value.
Search by parcel number 043-224-23 (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.