Olema 94950 · Olema · APN 166-181-01 · Unincorporated Marin
Zoned C-VCR in Unincorporated Marin with likely ministerial ADU eligibility and mapped FEMA AE flood / CAL FIRE moderate fire hazard severity zone (state responsibility area) / Alquist-Priolo fault due diligence; benchmark value $1,250,000 ($1,063,000–$1,438,000).
Zone C-VCR allows residential use qualifying for ministerial ADU review under state law.
Source: Unincorporated Marin zoning · CA Gov. Code 66314
On-parcel permit history is indexed through Nov 26, 2025, 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)
Zone AE: 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)
Automated synthesis of indexed municipal, county, state, and federal public records — informational context only, not a formal appraisal, survey, or legal/tax determination.
7 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
$1,250,000
Benchmark range: $1,063,000 – $1,438,000
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)
Intersects a State-mapped surface fault rupture zone. Adding habitable structures or subdividing typically requires a site-specific geologic fault investigation.
Source: California Geological Survey Alquist-Priolo Zones
Remodel / interior alteration (93576): Pending in review for 14 mo (5.0× the 83d median) — slower than 90% of remodel / interior alteration permits in Unincorporated Marin (median 83d, 90th pct 266d, n=1,054).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (review-time benchmark)
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-VCR as mixed use, 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.
Roof replacement permit issued (B44548)
Recorded status: Issued
Replacing like for like roofing, replacing siding with Hardie plank, replacing windows with double pane units, upgrading electrical service main and circuit boxes, replacing plugs, switches, and lighting fixtures. — New Circuits / Outlets, Service Upgrade, Replace Circuits / Outlets; New Plumbing Fixture(s), Replace Plumbing Fixtures(s); Replace Ductwork; Siding Replacement, ReRoofing, Non-structural Door/Window Replacement · Declared valuation: $444,000 · Contractor: Tom Mccafferty
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Roof replacement permit application filed (B44548)
Current status: Issued
Replacing like for like roofing, replacing siding with Hardie plank, replacing windows with double pane units, upgrading electrical service main and circuit boxes, replacing plugs, switches, and lighting fixtures. — New Circuits / Outlets, Service Upgrade, Replace Circuits / Outlets; New Plumbing Fixture(s), Replace Plumbing Fixtures(s); Replace Ductwork; Siding Replacement, ReRoofing, Non-structural Door/Window Replacement · Declared valuation: $444,000 · Contractor: Tom Mccafferty
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Remodel / interior alteration permit application filed (93576)
Current status: Applied
Non-Structural Remodel - Reduce Bedroom Number, Elec And Mech Upgrades (Temp Housing - Emergency Shelter Crisis Declaration) · Declared valuation: $750,000
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
New garage / accessory structure permit application filed (92734)
Current status: Applied
Cell Site Modification: Extend Steeple Upward; (N) Equipment Enclosure @ Ground Level - A T & T · Declared valuation: $250,000
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Electrical / panel permit application filed (B29780)
Current status: Issued
ATTENTION!! This main panel should be replaced ASAP!! It is a 100 AMP underground service with a meter. Damage to bus bar was detected. Panel location to remain the same and no additional load will be added. New panel will be 125 AMP underground fed. 2 new ground rods shall be added. Please call me (Jeff Casto) at (415)250-0026. Thank you! — Service Upgrade · Declared valuation: $2,500 · Contractor: Jeff Casto Construction
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Electrical / panel permit issued (B29780)
Recorded status: Issued
ATTENTION!! This main panel should be replaced ASAP!! It is a 100 AMP underground service with a meter. Damage to bus bar was detected. Panel location to remain the same and no additional load will be added. New panel will be 125 AMP underground fed. 2 new ground rods shall be added. Please call me (Jeff Casto) at (415)250-0026. Thank you! — Service Upgrade · Declared valuation: $2,500 · Contractor: Jeff Casto Construction
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 →Pending in review for 14 mo (5.0× the 83d median) — slower than 90% of remodel / interior alteration permits in Unincorporated Marin (median 83d, 90th pct 266d, n=1,054).
Pending in review for 2 yr (4.5× the 164d median) — slower than 90% of new garage / accessory structure permits in Unincorporated Marin (median 164d, 90th pct 485d, n=356).
| Builder / contractor | Primary specialty | Here / ½ mi | ½ mi valuation | Citywide 24m trend |
|---|---|---|---|---|
| Tom Mccafferty | Roof replacement | 1 on parcel1 in ½ mi | $444,000 | 0 vs 0 prior |
| Jeff Casto Construction | Electrical / panel | 1 on parcel1 in ½ mi | $2,500 | 0 vs 0 prior |
| Bic Construction Recent nearby: 10005 State Route 1 (Aug 4, 2022) | Commercial tenant improvement | 2 in ½ mi | $60,800 |
| 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) |
| New garage / accessory structureOn this parcel | 356 | 104d | 164d | 294d | 485d | 159d(vs 205d prior) |
HUD Small Area Fair Market Rent · ZIP 94950
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 ($12,500/yr) + local voter-approved bond debt ($1,875/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.
−$66,109/yr
Cash needed: $275,000
NOI: $9,739/yr
P&I: $6,321/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 | −$5,854/mo | -25.5% | $10,931/mo | −$5,860/mo |
| Base (your inputs) | Your entered assumptions, 3.0%/yr rent growth | $3,000/mo | −$5,509/mo | -24.0% | $10,118/mo | −$5,345/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 | −$5,311/mo | -23.2% | $9,883/mo | −$4,953/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.
Replacing like for like roofing, replacing siding with Hardie plank, replacing windows with double pane units, upgrading electrical service main and circuit boxes, replacing plugs, switches, and lighting fixtures. — New Circuits / Outlets, Service Upgrade, Replace Circuits / Outlets; New Plumbing Fixture(s), Replace Plumbing Fixtures(s); Replace Ductwork; Siding Replacement, ReRoofing, Non-structural Door/Window Replacement
Non-Structural Remodel - Reduce Bedroom Number, Elec And Mech Upgrades (Temp Housing - Emergency Shelter Crisis Declaration)
Cell Site Modification: Extend Steeple Upward; (N) Equipment Enclosure @ Ground Level - A T & T
ATTENTION!! This main panel should be replaced ASAP!! It is a 100 AMP underground service with a meter. Damage to bus bar was detected. Panel location to remain the same and no additional load will be added. New panel will be 125 AMP underground fed. 2 new ground rods shall be added. Please call me (Jeff Casto) at (415)250-0026. Thank you! — Service Upgrade
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
3.58 acres
Assessor's classification for assessment purposes. This is not zoning.
10189 STATE ROUTE 1
Source: County of Marin GIS (MarinMap), Parcels · Geography: parcel · Retrieved Nov 13, 2026
Search by parcel number 166-181-01. Assessed value is not market value.
Search by parcel number 166-181-01 (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.
| 2 vs 2 prior |
| Diamond Engineering Services Dba Des Builders Recent nearby: 10005 State Route 1 (May 23, 2022) | New garage / accessory structure | 1 in ½ mi | $180,000 | 0 vs 0 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 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) |
| Roof replacementOn this parcel | 3,663 | 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.