Nicasio 94946 · Nicasio · APN 121-310-18 · Unincorporated Marin
Zoned ARP-7 in Unincorporated Marin and mapped CAL FIRE moderate fire hazard severity zone (state responsibility area) due diligence; benchmark value $2,102,000 ($1,850,000–$2,354,000).
Public building records show issued construction/renovation work on this parcel (4 total permits, latest Jan 19, 2022).
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)
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)
Automated synthesis of indexed municipal, county, state, and federal public records — informational context only, not a formal appraisal, survey, or legal/tax determination.
Since November 2024 within ½ mile: 1 proposed or in review.
1 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.
11 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.
$2,102,000
Benchmark range: $1,850,000 – $2,354,000
Closest lead: Accessory dwelling unit at 29 Lafranchi Ln (0.16 mi SW, applied). Inspect timeline history before assuming near-term completion.
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · HCD APR (½-mile radius)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$2,052/mo). Confirm exact Mello-Roos / CFD special assessments on the county tax bill.
Source: CA Const. Art. XIIIA (Prop 13) · County Tax Collector
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: permits located by parcel, ½ mile radius · Retrieved Nov 13, 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 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 ARP-7 as agricultural, 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 9.6 yr (first record Mar 27, 2017), with no completion or new permit record in 9.1 yr. · $47,100 declared valuation
In "Applied" for 5.7 yr (since Feb 24, 2021), with no new permit record in 5.7 yr. · 1 unit · $4,000 declared valuation
In "Applied" for 5.1 yr (since Oct 19, 2021), with no new permit record in 5.1 yr. · 1 unit · $150,000 declared valuation
In "Applied" for 17 mo (since Jun 9, 2025), with no new permit record in 17 mo. · 1 unit · $50,000 declared valuation
Latest published Zillow Home Value Index (ZHVI) update
Changed from $2,055,088 in September 2025 to $2,118,994 in September 2026.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94946 (not a parcel appraisal)
Annual ZIP 94946 home-value index checkpoint
Changed from $2,152,177 in September 2024 to $2,055,088 in September 2025.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94946 (not a parcel appraisal)
4299 Nicasio Valley Rd · 1 unit · $50,000 valuation
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Annual ZIP 94946 home-value index checkpoint
Changed from $2,146,567 in September 2023 to $2,152,177 in September 2024.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94946 (not a parcel appraisal)
Annual ZIP 94946 home-value index checkpoint
Changed from $2,246,416 in September 2022 to $2,146,567 in September 2023.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94946 (not a parcel appraisal)
Annual ZIP 94946 home-value index checkpoint
Changed from $2,090,467 in September 2021 to $2,246,416 in September 2022.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94946 (not a parcel appraisal)
Solar / battery storage permit application filed (B28412)
Current status: Issued
INSTALL ADVANCED ENERGY SYSTEM INCLUDING: (2) TESLA POWERWALL 2 AC BATTERY SYSTEMS, (1) TESLA BACKUP GATEWAY 2, INSTALL NEW SUBPANEL TO HOLD EXISTING BACKUP LOADS · Declared valuation: $27,985 · Contractor: Swell Services Inc
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Solar / battery storage permit issued (B28412)
Recorded status: Issued
INSTALL ADVANCED ENERGY SYSTEM INCLUDING: (2) TESLA POWERWALL 2 AC BATTERY SYSTEMS, (1) TESLA BACKUP GATEWAY 2, INSTALL NEW SUBPANEL TO HOLD EXISTING BACKUP LOADS · Declared valuation: $27,985 · Contractor: Swell Services Inc
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Plumbing / water heater / sewer permit application filed (B28356)
Current status: Issued
Installing electrical and plumbing to support rainwater collection to be used for outdoor irrigation. — New Circuits / Outlets; New Plumbing Fixture(s) · Declared valuation: $5,000 · Contractor: George Borghi
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Plumbing / water heater / sewer permit issued (B28356)
Recorded status: Issued
Installing electrical and plumbing to support rainwater collection to be used for outdoor irrigation. — New Circuits / Outlets; New Plumbing Fixture(s) · Declared valuation: $5,000 · Contractor: George Borghi
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
29 Lafranchi Ln · 1 unit · $150,000 valuation
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Annual ZIP 94946 home-value index checkpoint
Changed from $1,618,926 in September 2020 to $2,090,467 in September 2021.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94946 (not a parcel appraisal)
4 Nicasio Creek Rd · 1 unit · $4,000 valuation
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
1 housing unit completed (148179)
Reported in 2018 Housing Element Annual Progress Report
SFD · Owner
Source: California HCD, Housing Element Annual Progress Report — Table A2 · Geography: parcel
5300 Nicasio Valley Rd · $47,100 valuation
Records span Mar 27, 2017 to Sep 21, 2017 (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 →High-impact scale (1 housing unit, $880,000 declared valuation across 1 permit).
In "Applied" for 5.1 yr (since Oct 19, 2021), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
In "Applied" for 5.7 yr (since Feb 24, 2021), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
Active in "Issued" for 9.6 yr (first record Mar 27, 2017) with no new permit activity recorded in 9.1 yr.
In "Applied" for 17 mo (since Jun 9, 2025), exceeding the 253d median and 456d 75th percentile for new single-family home permits in Unincorporated Marin (n=121).
| Builder / contractor | Primary specialty | Here / ½ mi | ½ mi valuation | Citywide 24m trend |
|---|---|---|---|---|
| Oakwood Construction | New single-family home | 1 on parcel1 in ½ mi | $880,000 | 0 vs 0 prior |
| Petersen Dean | Solar / battery storage | 1 on parcel1 in ½ mi | $28,445 | 0 vs 0 prior |
| Swell Services | Solar / battery storage | 1 on parcel1 in ½ mi | $27,985 | 0 |
| 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) |
| Accessory dwelling unit (new or conversion) | 298 | 120d | 204d | 331d | 549d | 214d(vs 181d prior) |
HUD Small Area Fair Market Rent · ZIP 94946
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 ($21,000/yr) + local voter-approved bond debt ($3,150/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.
−$127,461/yr
Cash needed: $462,000
NOI: -$36/yr
P&I: $10,619/mo
For $0/mo net cash flow
At $3,000/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 | $2,760/mo | −$10,966/mo | -28.5% | $18,068/mo | −$11,040/mo |
| Base (your inputs) | Your entered assumptions, 3.0%/yr rent growth | $3,000/mo | −$10,622/mo | -27.6% | $16,723/mo | −$10,525/mo |
| Optimistic (cap-limited) | +6% starting rent, 3% vacancy, 4.5%/yr rent growth (capped by AB 1482 ceiling of 8.6%/yr) | $3,180/mo | −$10,424/mo | -27.1% | $16,335/mo | −$10,133/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 unitsApr 2, 2015 – Mar 22, 2018
We group related permits and State housing reports into projects. That grouping is our inference, not an official record.
INSTALL ADVANCED ENERGY SYSTEM INCLUDING: (2) TESLA POWERWALL 2 AC BATTERY SYSTEMS, (1) TESLA BACKUP GATEWAY 2, INSTALL NEW SUBPANEL TO HOLD EXISTING BACKUP LOADS
Installing electrical and plumbing to support rainwater collection to be used for outdoor irrigation. — New Circuits / Outlets; New Plumbing Fixture(s)
P V Sys 7.7 K W - Express
Sfd W/Att Gar And Covered Porches***Ext To 7/28/18 T.D., 5/22/15
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 |
|---|---|---|---|---|---|---|
| 2018 | —(148179) | SFD · Owner | — | — | 1 (Mar 22, 2018) | — |
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
4.09 acres
Assessor's classification for assessment purposes. This is not zoning.
1 LAFRANCHI LN
Source: County of Marin GIS (MarinMap), Parcels · Geography: parcel · Retrieved Nov 13, 2026
Search by parcel number 121-310-18. Assessed value is not market value.
Search by parcel number 121-310-18 (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.
| George Borghi | Plumbing / water heater / sewer | 1 on parcel1 in ½ mi | $5,000 | 0 vs 0 prior |
| Richard E Wodehouse Recent nearby: 10 La Franchi Ln (Nov 5, 2021) | New garage / accessory structure | 2 in ½ mi | $600,000 | 0 vs 0 prior |
| North Cal Restoration And Construction Recent nearby: 5300 Nicasio Valley Rd (Sep 21, 2017) | Commercial tenant improvement | 2 in ½ mi | $127,100 | 1 vs 0 prior |
| Fault Line Builders Recent nearby: 100 Road To Ranches (Jan 5, 2022) | Remodel / interior alteration | 1 in ½ mi | $210,000 | 0 vs 0 prior |
| Owner Recent nearby: 37 Lafranchi Ln (Dec 21, 2020) | Pool / spa | 1 in ½ mi | $150,000 | 25 vs 15 prior+67% |
| 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) |
| Solar / battery storageOn this parcel | 2,977 | 0d | 0d | 0d | 2d | 0d |
| Plumbing / water heater / sewerOn this parcel | 2,211 | 0d | 0d | 0d | 0d | 0d |
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.