Nicasio 94946 · Nicasio · APN 121-250-59 · Unincorporated Marin
Zoned ARP-20 in Unincorporated Marin and mapped FEMA A flood / CAL FIRE high fire hazard severity zone (state responsibility area) due diligence; benchmark value $2,154,000 ($1,896,000–$2,412,000).
Public building records show issued construction/renovation work on this parcel (10 total permits, latest Sep 24, 2025).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (parcel APN)
Zone A: 1% annual chance flood (Special Flood Hazard Area) overlaps this parcel. Expect mandatory flood insurance for federally backed loans and floodplain elevation/mitigation rules for new units or SB 9 applications.
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.
6 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
$2,154,000
Benchmark range: $1,896,000 – $2,412,000
Demolition at 1600 Old Rancheria Rd: Active in "Issued" for 3.7 yr (first record Feb 22, 2023) with no new permit activity recorded in 3.4 yr.
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (review-time benchmark)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$2,102/mo). Confirm exact Mello-Roos / CFD special assessments on the county tax bill.
Source: CA Const. Art. XIIIA (Prop 13) · County Tax Collector
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 ARP-20 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 3.7 yr (first record Feb 22, 2023), with no completion or new permit record in 3.4 yr. · $13,000 declared valuation
Permit issued and active for 2.9 yr (first record Dec 11, 2023), with no completion or new permit record in 2.8 yr. · $15,000 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)
Roof replacement permit application filed (B44045)
Current status: Issued
remove standing seam roof and replace with standing seam — ReRoofing · Declared valuation: $55,000 · Contractor: Avalos Sheet Metal
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Roof replacement permit issued (B44045)
Recorded status: Issued
remove standing seam roof and replace with standing seam — ReRoofing · Declared valuation: $55,000 · Contractor: Avalos Sheet Metal
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
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)
1650 Old Rancheria Rd · $15,000 valuation
Records span Dec 11, 2023 to Jan 26, 2024 (1 permit).
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 $2,246,416 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)
Demolition permit issued (174222)
Recorded status: Issued
Demo Horse Stables · Declared valuation: $13,000 · Contractor: F.I.P Builders Inc.
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Demolition permit application filed (174222)
Current status: Issued
Demo Horse Stables · Declared valuation: $13,000 · Contractor: F.I.P Builders Inc.
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
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)
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)
Solar / battery storage permit application filed (84532)
Current status: Applied
Rooftop Solar 3.72 K W - Express · Declared valuation: $15,000 · Contractor: Bartsch, Bert
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Solar / battery storage permit application filed (84533)
Current status: Applied
Battery Backup - Express · Declared valuation: $15,000 · Contractor: Bartsch, Bert
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Solar / battery storage permit issued (163094)
Recorded status: Issued
Rooftop Solar - Fastrak, Non Conventional Framing · Declared valuation: $27,000 · Contractor: Bartsch, Bert
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Solar / battery storage permit issued (163095)
Recorded status: Issued
Battery Backup - Fastrack, Non-Conventional Framing · Declared valuation: $27,000 · Contractor: Bartsch, Bert
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 "Issued" for 3.7 yr (first record Feb 22, 2023) with no new permit activity recorded in 3.4 yr.
Pending in review for 7 yr — slower than 90% of solar / battery storage permits in Unincorporated Marin (median 0d, 90th pct 2d, n=2,977).
Pending in review for 7 yr — slower than 90% of solar / battery storage permits in Unincorporated Marin (median 0d, 90th pct 2d, n=2,977).
Issued after 6 mo — slower than 90% of solar / battery storage permits in Unincorporated Marin (median 0d, 90th pct 2d, n=2,977).
Issued after 6 mo — slower than 90% of solar / battery storage permits in Unincorporated Marin (median 0d, 90th pct 2d, n=2,977).
Pending in review for 7.5 yr — slower than 90% of electrical / panel permits in Unincorporated Marin (median 0d, 90th pct 2d, n=3,019).
| Builder / contractor | Primary specialty | Here / ½ mi | ½ mi valuation | Citywide 24m trend |
|---|---|---|---|---|
| Bartsch Bert | Solar / battery storage | 4 on parcel4 in ½ mi | $84,000 | 0 vs 0 prior |
| Avalos Sheet Metal | Roof replacement | 1 on parcel1 in ½ mi | $55,000 | 0 vs 0 prior |
| Metal Roof System | Roof replacement | 1 on parcel1 in ½ mi | $44,270 | 0 |
| Permit category | Sample (n) | 25th pct | Median (50th) | 75th pct | 90th pct | Recent 24m median |
|---|---|---|---|---|---|---|
| New single-family home | 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) |
| Demolition |
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 ($21,550/yr) + local voter-approved bond debt ($3,233/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.
−$131,431/yr
Cash needed: $474,100
NOI: -$669/yr
P&I: $10,897/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 | −$11,297/mo | -28.6% | $18,530/mo | −$11,375/mo |
| Base (your inputs) | Your entered assumptions, 3.0%/yr rent growth | $3,000/mo | −$10,953/mo | -27.7% | $17,151/mo | −$10,860/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 | −$10,755/mo | -27.2% | $16,752/mo | −$10,468/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.
IssuedFeb 22, 2023 – Jun 7, 2023
We group related permits and State housing reports into projects. That grouping is our inference, not an official record.
remove standing seam roof and replace with standing seam — ReRoofing
Demo Horse Stables
Battery Backup - Express
Rooftop Solar 3.72 K W - Express
Battery Backup - Fastrack, Non-Conventional Framing
Rooftop Solar - Fastrak, Non Conventional Framing
new 400 Amp electrical main service panel,there is an existing old 200 amp Zinsco panel on the house ,underground fed . PG&E is making us move the new MSP closer to the drop on the back corner of the detached garaged. I am installing a Cal 320 amp panel ( which is a 400 amp MSP derated to 320 amp. I have met with PG&E service planning on site and they have approved the project,my account # with PG&E is 117063126 — Service Upgrade
Repl 200 A Main Panel, E-Insp
Refurbish Barn - New Walls & Foundation -Ag Exempt
Re-Roof
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.
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 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
11.78 acres
Assessor's classification for assessment purposes. This is not zoning.
1600 OLD RANCHERIA RD
Source: County of Marin GIS (MarinMap), Parcels · Geography: parcel · Retrieved Nov 13, 2026
Search by parcel number 121-250-59. Assessed value is not market value.
Search by parcel number 121-250-59 (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.
| Fip Builders | Demolition | 1 on parcel1 in ½ mi | $13,000 | 0 vs 0 prior |
| Bert Bartsch | Electrical / panel | 1 on parcel1 in ½ mi | $9,000 | 0 vs 0 prior |
| Owner Builder Recent nearby: 1655 Old Rancheria Rd (Mar 28, 2025) | Demolition | 2 in ½ mi | $19,000 | 226 vs 240 prior−6% |
| 130 |
| 11d |
| 55d |
| 106d |
| 261d |
| 80d(vs 56d prior) |
| Addition (adds square footage) | 316 | 103d | 160d | 249d | 440d | 157d(vs 167d prior) |
| Remodel / interior alterationOn this parcel | 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 |
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.