· Inverness · APN 166-020-37 · Unincorporated Marin
Zoned C-RSP-0.16 in Unincorporated Marin with likely ADU & SB 9 infill eligibility and mapped CAL FIRE high fire hazard severity zone (state responsibility area) due diligence; benchmark value $1,881,000 ($1,599,000–$2,163,000).
Zoned C-RSP-0.16 supports ministerial ADU/JADU review plus SB 9 both two-unit development and ministerial urban lot split on a 958,494 sq ft lot.
Source: Unincorporated Marin zoning · CA Gov. Code 66314 & 65852.21
On-parcel permit history is indexed through Jul 11, 2022, letting you verify roof, HVAC, electrical, or structural work against seller disclosures.
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (parcel APN)
all of the lot of the parcel intersects Zone X: minimal flood hazard. Outside mandatory federal SFHA insurance rules, but check local drainage and finished-floor requirements.
Source: FEMA National Flood Hazard Layer (parcel polygon)
Automated synthesis of indexed municipal, county, state, and federal public records — informational context only, not a formal appraisal, survey, or legal/tax determination.
13 permits within ½ mile since November 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 Nov 13, 2026
$1,881,000
Benchmark range: $1,599,000 – $2,163,000
Located in a mapped Fire Hazard Severity Zone. Expect Chapter 7A ignition-resistant building standards, defensible-space inspections, and stricter property insurance underwriting.
Source: CAL FIRE FHSZ (map Apr 1, 2024)
New home at 70 Fox Dr: Active in "Issued" for 5.8 yr (first record Jan 14, 2021) with no new permit activity recorded in 4.3 yr. High-impact scale (1 housing unit, $1,032,000 declared valuation across 1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (review-time benchmark)
Closest lead: New home at 5 Fox Dr (0.28 mi E, issued). Inspect timeline history before assuming near-term completion.
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · HCD APR (½-mile radius)
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.
No ADU or new-home permits recorded within ¼ mile in this window.
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 Nov 13, 2026) · CAL FIRE Office of the State Fire Marshal, Fire Hazard Severity Zones in the State Responsibility Area (effective 2024-04-01) (retrieved Nov 9, 2026) · CAL FIRE Office of the State Fire Marshal, Fire Hazard Severity Zones in the Local Responsibility Area (map dated 2025-03-24) (retrieved Nov 9, 2026) · FEMA, National Flood Hazard Layer — flood hazard zones (retrieved Nov 9, 2026) · FEMA, National Flood Hazard Layer — FIRM panels (retrieved Nov 9, 2026) · California Geological Survey, Alquist-Priolo Earthquake Fault Zones (retrieved Nov 9, 2026) · Zoning classes: our classification of C-RSP-0.16 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 5.8 yr (first record Jan 14, 2021), with no completion or new permit record in 4.3 yr. · 1 unit · $1,032,000 declared valuation
Permit issued and active for 6.3 yr (first record Jul 21, 2020), with no completion or new permit record in 4.9 yr. · 1 unit · $150,000 declared valuation
Permit issued and active for 2.4 yr (first record Jun 6, 2024), with no completion or new permit record in 2.2 yr. · 1 unit · $400,000 declared valuation
5 Fox Dr · 1 unit · $400,000 valuation
Records span Jun 6, 2024 to Sep 17, 2024 (2 permits).
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 (171874)
Reported in 2022 Housing Element Annual Progress Report
SFD · Owner
Source: California HCD, Housing Element Annual Progress Report — Table A2 · Geography: parcel
New single-family home permit issued (171874)
Recorded status: Issued
S F D · Declared valuation: $1,032,000 · 1 housing unit
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
New garage / accessory structure permit issued (171875)
Recorded status: Issued
Det Garage · Declared valuation: $149,000
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
General repair permit issued (171876)
Recorded status: Issued
Driveway Ret Wall · Declared valuation: $13,000
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
General repair permit issued (171877)
Recorded status: Issued
Ret Walls Below House · Declared valuation: $16,000
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
141 Silver Hills Rd (Aka 145) · 1 unit · $150,000 valuation
Records span Jul 21, 2020 to Dec 29, 2021 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
New garage / accessory structure permit application filed (171875)
Current status: Issued
Det Garage · Declared valuation: $149,000
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
General repair permit application filed (171876)
Current status: Issued
Driveway Ret Wall · Declared valuation: $13,000
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
General repair permit application filed (171877)
Current status: Issued
Ret Walls Below House · Declared valuation: $16,000
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
New single-family home permit application filed (171874)
Current status: Issued
S F D · Declared valuation: $1,032,000
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Planning entitlement approved for 1 housing unit (HCD 2021 report)
Reported in 2021 Housing Element Annual Progress Report
ADU · Renter
Source: California HCD, Housing Element Annual Progress Report — Table A2 · Geography: parcel
Planning entitlement approved for 1 housing unit (88000)
Reported in 2021 Housing Element Annual Progress Report
SFD · Owner
Source: California HCD, Housing Element Annual Progress Report — Table A2 · 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 "Issued" for 5.8 yr (first record Jan 14, 2021) with no new permit activity recorded in 4.3 yr. High-impact scale (1 housing unit, $1,032,000 declared valuation across 1 permit).
Issued after 14 mo (5.1× the 83d median) — slower than 90% of general repair permits in Unincorporated Marin (median 83d, 90th pct 328d, n=693).
Issued after 14 mo (5.1× the 83d median) — slower than 90% of general repair permits in Unincorporated Marin (median 83d, 90th pct 328d, n=693).
Issued after 14 mo (2.6× the 164d median) — above the 75th percentile for new garage / accessory structure permits in Unincorporated Marin (median 164d, 75th pct 294d, n=356).
Active in "Issued" for 2.4 yr (first record Jun 6, 2024) with no new permit activity recorded in 2.2 yr.
Active in "Issued" for 6.3 yr (first record Jul 21, 2020) with no new permit activity recorded in 4.9 yr.
Substantial improvements (additions, interior remodels, ADUs, commercial TI, and new builds) across 1,390 parcels
Small prior baseline
City baseline: 16.4 / 1k
9 in trailing 24m
Includes 4 ADUs
| Builder / contractor | Primary specialty | Here / ½ mi | ½ mi valuation | Citywide 24m trend |
|---|---|---|---|---|
| Owner Builder Recent nearby: 5 Fox Dr (Sep 17, 2024) | New single-family home | 4 in ½ mi | $1,450,000 | 226 vs 240 prior−6% |
| Louis Ptak Construction Recent nearby: 11 Fox Dr (Nov 17, 2023) | New garage / accessory structure | 2 in ½ mi | $330,000 | 1 vs 3 prior |
| Permit category | Sample (n) | 25th pct | Median (50th) | 75th pct | 90th pct | Recent 24m median |
|---|---|---|---|---|---|---|
| New single-family homeOn this parcel | 121 | 166d | 253d | 456d | 686d | 211d(vs 273d prior) |
| New multifamily / condos / mixed-use | 21 | 272d | 292d | 293d | 313d | 293d(vs 197d prior) |
| New garage / accessory structureOn this parcel | 356 | 104d | 164d | 294d | 485d |
HUD Metro Fair Market Rent · San Francisco, CA HUD Metro FMR Area
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 ($18,800/yr) + local voter-approved bond debt ($2,820/yr) + fixed direct levies/Mello-Roos ($450/yr).
Mapped hazard zone insurance context on this parcel:
Model adding a backyard ADU or garage conversion under California's Prop 13 blended new-construction assessment (existing house & land tax base stays intact; only ADU build cost is assessed) and SB 13 impact-fee rules.
−$106,009/yr
Cash needed: $413,600
NOI: $8,067/yr
P&I: $9,506/mo
For $0/mo net cash flow
At $3,600/mo gross 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 | $3,312/mo | −$9,248/mo | -26.8% | $16,221/mo | −$9,279/mo |
| Base (your inputs) | Your entered assumptions, 3.0%/yr rent growth | $3,600/mo | −$8,834/mo | -25.6% | $15,014/mo | −$8,661/mo |
| Optimistic (cap-limited) | +6% starting rent, 3% vacancy, 4.5%/yr rent growth (capped by AB 1482 ceiling of 8.6%/yr) | $3,816/mo | −$8,597/mo | -24.9% | $14,665/mo | −$8,192/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 unitsJan 14, 2021 – Jul 11, 2022
We group related permits and State housing reports into projects. That grouping is our inference, not an official record.
Ret Walls Below House
Driveway Ret Wall
Det Garage
S F D
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel (APN) · Retrieved Nov 13, 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 |
|---|---|---|---|---|---|---|
| 2022 | —(171874) | SFD · Owner | — | 1 (Jul 11, 2022) | — | — |
| 2021 | —(88000) | SFD · Owner | 1 (Jan 14, 2021) | — | — | — |
| 2021 | — | ADU · Renter | 1 (Jan 14, 2021) | — | — | — |
Source: California HCD, Housing Element Annual Progress Report — Table A2 · Geography: project (parcel) · Retrieved Nov 9, 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 Nov 13, 2026
22.00 acres
Assessor's classification for assessment purposes. This is not zoning.
Source: County of Marin GIS (MarinMap), Parcels · Geography: parcel · Retrieved Nov 13, 2026
Search by parcel number 166-020-37. Assessed value is not market value.
Search by parcel number 166-020-37 (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.
| 159d(vs 205d prior) |
| Accessory dwelling unit (new or conversion) | 298 | 120d | 204d | 331d | 549d | 214d(vs 181d prior) |
| Addition (adds square footage) | 316 | 103d | 160d | 249d | 440d | 157d(vs 167d prior) |
| Remodel / interior alteration | 1,054 | 36d | 83d | 148d | 266d | 112d(vs 77d prior) |
| Commercial tenant improvement | 81 | 99d | 148d | 233d | 443d | 152d(vs 150d prior) |
| General repairOn this parcel | 693 | 38d | 83d | 181d | 328d | 97d(vs 66d prior) |
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Computed from issued permits with recorded application and issuance dates over the trailing 60 months. Categories with fewer than 20 permits are excluded.