Mill Valley 94941 · Alto · APN 033-082-05 · Unincorporated Marin
Since October 2024 within ½ mile: 2 homes completed, 5 permitted, 3 proposed or in review.
10 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.
163 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.
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: permits located by parcel, ½ mile radius · Retrieved Oct 29, 2026
$2,501,000
Benchmark range: $2,201,000 – $2,801,000
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 29, 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-B1 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.
In "Applied" for 8 mo (since Mar 9, 2026), with no new permit record in 8 mo. · 1 unit · $3,000 declared valuation
Permit issued and active for 12.6 yr (first record Mar 13, 2014), with no completion or new permit record in 12.6 yr. · $6,450 declared valuation
Permit issued and active for 12.9 yr (first record Dec 19, 2013), with no completion or new permit record in 12.5 yr. · 1 unit · $445,000 declared valuation
Permit issued and active for 12.6 yr (first record Mar 6, 2014), with no completion or new permit record in 12.3 yr. · 1 unit · $174,000 declared valuation
Permit issued and active for 12.3 yr (first record Jun 30, 2014), with no completion or new permit record in 12.2 yr. · 1 unit · $685,000 declared valuation
Permit issued and active for 11.8 yr (first record Dec 22, 2014), with no completion or new permit record in 11.4 yr. · 1 unit · $750,000 declared valuation
54 Shell Rd · 1 unit · $182,160 valuation
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)
Addition (adds square footage) permit application filed (94454)
Current status: Applied
Enclosing 12ft By 4 Ft Porch. Total Of 48 Sq Ft. To Become Foyer To Main House. · Declared valuation: $3,000
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Accessory dwelling unit (new or conversion) permit application filed (94052)
Current status: Applied
Convert (E) Master Bedroom Into J A D U. Will Add Kitchenette And Appliances - Related To 179454 And Combined In Pdox · Declared valuation: $3,000
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
13 Shell Rd · 1 unit · $100,000 valuation
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 (180400)
Reported in 2025 Housing Element Annual Progress Report
ADU · Renter
Source: California HCD, Housing Element Annual Progress Report — Table A2 · Geography: parcel
Accessory dwelling unit (new or conversion) permit issued (180400)
Recorded status: Issued
New 2 Story Detached A D U · Declared valuation: $100,000 · 1 housing unit · Contractor: Owner/Builder
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
12 Shell Rd (A D U 12 A) · 1 unit · $8,000 valuation
Records span Mar 3, 2023 to Oct 15, 2025 (1 permit).
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)
1 unit
Records span Mar 4, 2024 to Sep 16, 2025 (0 permits).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
16 Shell Rd ( Adu 16a) · 1 unit · $300,000 valuation
Records span Mar 7, 2025 to Jul 17, 2025 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Addition (adds square footage) permit issued (179454)
Recorded status: Issued
Addition; Remodel · Declared valuation: $200,000 · Contractor: Owner/Builder
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Accessory dwelling unit (new or conversion) permit application filed (180400)
Current status: Issued
New 2 Story Detached A D U · Declared valuation: $100,000 · Contractor: Owner/Builder
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
55 Plaza Dr (Adu 55a) · 1 unit · $790,000 valuation
Records span Apr 17, 2024 to Apr 3, 2025 (1 permit).
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)
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 2.5 yr (first record Apr 17, 2024) with no new permit activity recorded in 19 mo. High-impact scale (1 housing unit, $790,000 declared valuation across 1 permit).
Active in "Issued" for 2.3 yr (first record Jul 5, 2024) with no new permit activity recorded in 22 mo. High-impact scale (1 housing unit, $2,800,000 declared valuation across 1 permit).
Active in "Issued" for 17 mo (first record May 28, 2025) with no new permit activity recorded in 12 mo.
Active in "Applied" for 6.2 yr (first record Sep 1, 2020) with no new permit activity recorded in 6.2 yr. High-impact scale (1 housing unit, $1,000,000 declared valuation across 1 permit).
Active in "Issued" for 11.8 yr (first record Dec 22, 2014) with no new permit activity recorded in 11.4 yr. High-impact scale (1 housing unit, $750,000 declared valuation across 1 permit).
Active in "Issued" for 12.6 yr (first record Mar 13, 2014) with no new permit activity recorded in 12.6 yr.
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 ($25,000/yr) + local voter-approved bond debt ($3,750/yr) + fixed direct levies/Mello-Roos ($450/yr).
Mapped hazard zone insurance context on this parcel:
−$147,509/yr
Cash needed: $550,000
NOI: $4,188/yr
P&I: $12,641/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 | −$12,746/mo | -27.8% | $21,426/mo | −$12,813/mo |
| Base (your inputs) | Your entered assumptions, 3.0%/yr rent growth | $3,950/mo | −$12,292/mo | -26.8% | $19,832/mo | −$12,135/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 | −$12,032/mo | -26.3% | $19,371/mo | −$11,619/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 unitsMar 9, 2026 – Mar 9, 2026
Issued1 unitsMay 28, 2025 – Oct 31, 2025
We group related permits and State housing reports into projects. That grouping is our inference, not an official record.
Enclosing 12ft By 4 Ft Porch. Total Of 48 Sq Ft. To Become Foyer To Main House.
Convert (E) Master Bedroom Into J A D U. Will Add Kitchenette And Appliances - Related To 179454 And Combined In Pdox
New 2 Story Detached A D U
Addition; Remodel
7sq asphalt shingle install with partial tear-off — ReRoofing
Replace Windows, Strct & Non-, Delete Wall & Bedroom 3 T.D. 10/31/19
Remodel Kitchen & Alcove - Express
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel (APN) · Retrieved Oct 29, 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 | —(180400) | ADU · Renter | — | 1 (Oct 31, 2025) | — | — |
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 29, 2026
0.17 acres
Assessor's classification for assessment purposes. This is not zoning.
29A MEADOW DR; 29 MEADOW DR
Source: County of Marin GIS (MarinMap), Parcels · Geography: parcel · Retrieved Oct 29, 2026
Search by parcel number 033-082-05. Assessed value is not market value.
Search by parcel number 033-082-05 (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.