San Rafael 94903 · Santa Venetia · APN 180-182-27 · Unincorporated Marin
Since October 2024 within ½ mile: 3 permitted, 2 proposed or in review; 2 demolitions.
7 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.
414 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.
$1,513,000
Benchmark range: $1,331,000 – $1,695,000
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: permits located by parcel, ½ mile radius · Retrieved Oct 30, 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 30, 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.
Permit issued and active for 4.1 yr (first record Sep 27, 2022), with no completion or new permit record in 2.8 yr. · 1 unit · $5,000 declared valuation
Permit issued and active for 13.2 yr (first record Aug 20, 2013), with no completion or new permit record in 12.6 yr. · 1 unit · $443,685 declared valuation
Permit issued and active for 12.8 yr (first record Dec 23, 2013), with no completion or new permit record in 12.6 yr. · 1 unit · $357,000 declared valuation
Permit issued and active for 11.8 yr (first record Jan 15, 2015), with no completion or new permit record in 11.4 yr. · $20,000 declared valuation
Permit issued and active for 9.4 yr (first record Jun 1, 2017), with no completion or new permit record in 9.2 yr. · $5,500 declared valuation
Permit issued and active for 7.5 yr (first record May 16, 2019), with no completion or new permit record in 7.4 yr. · $4,500 declared valuation
Nearby plumbing / water heater / sewer (306 Vendola Dr): First appeared in published agency feed
Record B48952 · Detected between snapshots
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Snapshot diff within ½ mile
Nearby commercial tenant improvement (220 N San Pedro Rd): First appeared in published agency feed
Record 94602 · 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 $1,200,587 in September 2025 to $1,250,063 in September 2026.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94903 (not a parcel appraisal)
0 Sidney Ct (A P N 180-252-07) · $2,000 valuation
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
131 Vendola Dr · 1 unit · $225,000 valuation
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
15 Vendola Dr (A D U 15 A) · 1 unit · $327,369 valuation
Records span Jul 16, 2025 to Dec 15, 2025 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Annual ZIP 94903 home-value index checkpoint
Changed from $1,237,445 in September 2024 to $1,200,587 in September 2025.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94903 (not a parcel appraisal)
16 Crestview Way · 1 unit · $770,000 valuation
Records span May 20, 2024 to Aug 26, 2025 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
705 Adrian Way · 1 unit · $35,000 valuation
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
18 Venetia Meadows (Adu 18a) · 1 unit · $92,500 valuation
Records span Oct 20, 2023 to Jan 28, 2025 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
208 Mark Twain Ave · $4,934 valuation
Records span Sep 30, 2024 to Nov 5, 2024 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Annual ZIP 94903 home-value index checkpoint
Changed from $1,210,123 in September 2023 to $1,237,445 in September 2024.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94903 (not a parcel appraisal)
139 Mabry Way (Adu 139a) · 1 unit · $125,000 valuation
Records span Sep 15, 2023 to Aug 9, 2024 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
329 N San Pedro Rd (Adu 329a) · 1 unit · $9,216 valuation
Records span Jul 19, 2023 to May 23, 2024 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
251 N San Pedro Rd · $400,000 valuation
Records span Jan 22, 2024 to Feb 27, 2024 (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 4.1 yr (first record Sep 27, 2022) with no new permit activity recorded in 2.8 yr.
Active in "Issued" for 2.4 yr (first record May 20, 2024) with no new permit activity recorded in 14 mo. High-impact scale (1 housing unit, $770,000 declared valuation across 1 permit).
Active in "Applied" for 5.7 yr (first record Feb 9, 2021) with no new permit activity recorded in 5.7 yr.
Active in "Issued" for 3.3 yr (first record Jul 19, 2023) with no new permit activity recorded in 2.4 yr.
Active in "Issued" for 3 yr (first record Oct 20, 2023) with no new permit activity recorded in 21 mo.
Active in "Issued" for 3.6 yr (first record Mar 24, 2023) with no new permit activity recorded in 2.9 yr.
Substantial improvements (additions, interior remodels, ADUs, commercial TI, and new builds) across 1,652 parcels
−50.0% YoY
City baseline: 16.5 / 1k
18 in trailing 24m
Includes 5 ADUs
HUD Small Area Fair Market Rent · ZIP 94903
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 ($15,150/yr) + local voter-approved bond debt ($2,273/yr) + fixed direct levies/Mello-Roos ($450/yr).
Insurance & hazard context:
−$73,003/yr
Cash needed: $333,300
NOI: $18,925/yr
P&I: $7,661/mo
For $0/mo net cash flow
At $4,175/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 | $3,841/mo | −$6,563/mo | -23.6% | $13,003/mo | −$6,531/mo |
| Base (your inputs) | Your entered assumptions, 3.0%/yr rent growth | $4,175/mo | −$6,084/mo | -21.9% | $12,035/mo | −$5,815/mo |
| Optimistic (cap-limited) | +6% starting rent, 3% vacancy, 4.5%/yr rent growth (capped by AB 1482 ceiling of 8.6%/yr) | $4,426/mo | −$5,808/mo | -20.9% | $11,755/mo | −$5,269/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 unitsSep 27, 2022 – Jan 26, 2024
We group related permits and State housing reports into projects. That grouping is our inference, not an official record.
PG&E service upgrade to property and new electrical meter for ADU. — Service Upgrade
New Manufactured A D U On Permanent Foundation
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel (APN) · Retrieved Oct 30, 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 |
|---|---|---|---|---|---|---|
| 2023 | —(90511) | ADU · Renter | 1 (Sep 27, 2022) | 1 (Jan 27, 2023) | — | — |
| 2022 | —(90511) | ADU · Renter | 1 (Sep 27, 2022) | — | — | — |
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 30, 2026
0.15 acres
Assessor's classification for assessment purposes. This is not zoning.
319A SAN PEDRO RD; 319 N SAN PEDRO RD
Source: County of Marin GIS (MarinMap), Parcels · Geography: parcel · Retrieved Oct 30, 2026
Search by parcel number 180-182-27. Assessed value is not market value.
Search by parcel number 180-182-27 (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.