Fairfax 94930 · Unincorporated Fairfax · APN 174-021-07 · Unincorporated Marin
Zoned R1 in Unincorporated Marin with likely ADU & SB 9 infill eligibility and mapped CAL FIRE moderate fire hazard severity zone (state responsibility area) due diligence; benchmark value $1,273,000 ($1,120,000–$1,426,000).
Zoned R1 supports ministerial ADU/JADU review plus SB 9 both two-unit development and ministerial urban lot split on a 7,231 sq ft lot.
Source: Unincorporated Marin zoning · CA Gov. Code 66314 & 65852.21
On-parcel permit history is indexed through Mar 22, 2026, 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.
Since November 2024 within ½ mile: 2 homes completed.
2 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.
94 permits within ½ mile since November 2024
$1,273,000
Benchmark range: $1,120,000 – $1,426,000
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)
Remodel / interior alteration (94082): Pending in review for 8 mo (2.9× the 83d median) — above the 75th percentile for remodel / interior alteration permits in Unincorporated Marin (median 83d, 75th pct 148d, n=1,054).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (review-time benchmark)
Closest lead: 54 new homes (0.34 mi W, 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)
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
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 R1 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 8 yr (first record Nov 26, 2018), with no completion or new permit record in 8 yr. · 54 units
In "Entitled" for 5.3 yr (since Jul 9, 2021), with no new permit record in 5.3 yr. · 1 unit
Nearby remodel / interior alteration (433 Oak Manor Dr): First appeared in published agency feed
Record 94623 · 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 $1,169,780 in September 2025 to $1,233,096 in September 2026.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94930 (not a parcel appraisal)
Other permit application filed (B46259)
Current status: Issued
Declared valuation: $50,000 · Contractor: Bofill Construction Inc
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Other permit issued (B46259)
Recorded status: Issued
Declared valuation: $50,000 · Contractor: Bofill Construction Inc
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Remodel / interior alteration permit application filed (94082)
Current status: Applied
Struc Kitchen Remodel **Withdrawn**
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Annual ZIP 94930 home-value index checkpoint
Changed from $1,215,573 in September 2024 to $1,169,780 in September 2025.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94930 (not a parcel appraisal)
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Other permit application filed (B40683)
Current status: Issued
Installing a Generac 14KW whole home automatic stand-by generator, with 100A Automatic Transfer Switch. · Declared valuation: $23,000 · Contractor: Divine Electric Inc
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Other permit issued (B40683)
Recorded status: Issued
Installing a Generac 14KW whole home automatic stand-by generator, with 100A Automatic Transfer Switch. · Declared valuation: $23,000 · Contractor: Divine Electric Inc
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Other permit application filed (B39798)
Current status: Issued
Non structural remodel of hall bathroom · Declared valuation: $25,000 · Contractor: Warne Renovation Inc
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Other permit issued (B39798)
Recorded status: Issued
Non structural remodel of hall bathroom · Declared valuation: $25,000 · Contractor: Warne Renovation Inc
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Annual ZIP 94930 home-value index checkpoint
Changed from $1,214,660 in September 2023 to $1,215,573 in September 2024.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94930 (not a parcel appraisal)
HVAC / heat pump permit application filed (B38819)
Current status: Issued
Replace failed furnace and ducting with new air handler and ducting and install heat pump new — Replace Ductwork, Mechanical Appliance, Replace Mechanical Appliance · Declared valuation: $18,600 · Contractor: Ernest Ongaro & Sons Inc
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
HVAC / heat pump permit issued (B38819)
Recorded status: Issued
Replace failed furnace and ducting with new air handler and ducting and install heat pump new — Replace Ductwork, Mechanical Appliance, Replace Mechanical Appliance · Declared valuation: $18,600 · Contractor: Ernest Ongaro & Sons Inc
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 8 yr (first record Nov 26, 2018) with no new permit activity recorded in 8 yr. High-impact scale (54 housing units, 54 deed-restricted affordable across 0 permits).
Pending in review for 8 mo (2.9× the 83d median) — above the 75th percentile for remodel / interior alteration permits in Unincorporated Marin (median 83d, 75th pct 148d, n=1,054).
In "Entitled" for 5.3 yr (since Jul 9, 2021), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
High-impact scale (54 housing units, 54 deed-restricted affordable across 0 permits).
Substantial improvements (additions, interior remodels, ADUs, commercial TI, and new builds) across 470 parcels
Small prior baseline
City baseline: 16.4 / 1k
6 in trailing 24m
Includes 1 ADUs
| Builder / contractor | Primary specialty | Here / ½ mi | ½ mi valuation | Citywide 24m trend |
|---|---|---|---|---|
| Bofill Construction | Other | 1 on parcel1 in ½ mi | $50,000 | 0 vs 0 prior |
| Warne Renovation | Other | 1 on parcel1 in ½ mi | $25,000 | 2 vs 1 prior |
| Divine Electric | Other | 1 on parcel1 in ½ mi | $23,000 | 2 vs 1 prior |
| 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) |
| Addition (adds square footage) |
HUD Small Area Fair Market Rent · ZIP 94930
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 ($12,750/yr) + local voter-approved bond debt ($1,913/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.
−$65,592/yr
Cash needed: $280,500
NOI: $11,774/yr
P&I: $6,447/mo
For $0/mo net cash flow
At $3,250/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 | $2,990/mo | −$5,839/mo | -25.0% | $11,141/mo | −$5,837/mo |
| Base (your inputs) | Your entered assumptions, 3.0%/yr rent growth | $3,250/mo | −$5,466/mo | -23.4% | $10,312/mo | −$5,280/mo |
| Optimistic (cap-limited) | +6% starting rent, 3% vacancy, 4.5%/yr rent growth (capped by AB 1482 ceiling of 8.6%/yr) | $3,445/mo | −$5,252/mo | -22.5% | $10,073/mo | −$4,855/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.
Struc Kitchen Remodel **Withdrawn**
Installing a Generac 14KW whole home automatic stand-by generator, with 100A Automatic Transfer Switch.
Non structural remodel of hall bathroom
Replace failed furnace and ducting with new air handler and ducting and install heat pump new — Replace Ductwork, Mechanical Appliance, Replace Mechanical Appliance
REMOVE AND REPLACE CLASS A COMP SHINGLE ROOF. — ReRoofing; With Electronic Inspection
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
0.17 acres
Assessor's classification for assessment purposes. This is not zoning.
251 OAK MANOR DR
Source: County of Marin GIS (MarinMap), Parcels · Geography: parcel · Retrieved Nov 13, 2026
Search by parcel number 174-021-07. Assessed value is not market value.
Search by parcel number 174-021-07 (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.
| Able Roofing | Roof replacement | 1 on parcel1 in ½ mi | $19,145 | 0 vs 0 prior |
| Ernest Ongaro And Sons | HVAC / heat pump | 1 on parcel1 in ½ mi | $18,600 | 0 vs 0 prior |
| Owner Builder Recent nearby: 31 Mariele Dr (Dec 20, 2022) | Addition (adds square footage) | 10 in ½ mi | $905,000 | 226 vs 240 prior−6% |
| Owner Recent nearby: 10 Gary Way (May 6, 2021) | Remodel / interior alteration | 5 in ½ mi | $150,000 | 25 vs 15 prior+67% |
| Colemere Construction Recent nearby: 275 Oak Manor Dr (May 20, 2021) | Remodel / interior alteration | 3 in ½ mi | $96,000 | 0 vs 0 prior |
| Juan Calmell Recent nearby: 235 Oak Manor Dr (Apr 9, 2015) | Addition (adds square footage) | 2 in ½ mi | $55,000 | 0 vs 0 prior |
| Rebath By Schicker Recent nearby: 375 Oak Manor Dr (Oct 31, 2017) | Remodel / interior alteration | 2 in ½ mi | $20,000 | 0 vs 1 prior |
| 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 |
| HVAC / heat pumpOn this parcel | 2,946 | 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.