Fairfax 94930 · Unincorporated Fairfax · APN 174-043-10 · 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 $1,306,000 ($1,149,000–$1,463,000).
Zoned R1 supports ministerial ADU/JADU review plus SB 9 both two-unit development and ministerial urban lot split on a 8,320 sq ft lot.
Source: Unincorporated Marin zoning · CA Gov. Code 66314 & 65852.21
Public building records show issued construction/renovation work on this parcel (12 total permits, latest Dec 10, 2025).
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: 1 homes completed.
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.
106 permits within ½ mile since November 2024
$1,306,000
Benchmark range: $1,149,000 – $1,463,000
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)
Plumbing / water heater / sewer (163273): Issued after 5 mo — slower than 90% of plumbing / water heater / sewer permits in Unincorporated Marin (median 0d, 90th pct 0d, n=2,211).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (review-time benchmark)
Closest lead: 54 new homes (0.48 mi SW, 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
Permit issued and active for 5.8 yr (first record Jan 29, 2021), with no completion or new permit record in 5.8 yr. · 1 unit
In "Entitled" for 5.3 yr (since Jul 9, 2021), with no new permit record in 5.3 yr. · 1 unit
Nearby roof replacement (16 Dutch Valley Ln): First appeared in published agency feed
Record B49029 · Detected between snapshots
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Snapshot diff within ½ mile
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)
Windows / doors / siding permit application filed (B45117)
Current status: Issued
R/R 3 WINDOWS RETROFIT & 1 WINDOW NAIL FIN ALL LIKE FOR LIKE — Non-structural Door/Window Replacement · Declared valuation: $5,544 · Contractor: Northwest Exteriors Inc
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Windows / doors / siding permit issued (B45117)
Recorded status: Issued
R/R 3 WINDOWS RETROFIT & 1 WINDOW NAIL FIN ALL LIKE FOR LIKE — Non-structural Door/Window Replacement · Declared valuation: $5,544 · Contractor: Northwest Exteriors Inc
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)
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 (B36148)
Current status: Issued
Install new heat pump and air handler system. — Replace Mechanical Appliance · Declared valuation: $23,516 · Contractor: John Owens Services Inc
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
HVAC / heat pump permit issued (B36148)
Recorded status: Issued
Install new heat pump and air handler system. — Replace Mechanical Appliance · Declared valuation: $23,516 · Contractor: John Owens Services Inc
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Annual ZIP 94930 home-value index checkpoint
Changed from $1,278,920 in September 2022 to $1,214,660 in September 2023.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94930 (not a parcel appraisal)
General repair permit issued (173882)
Recorded status: Issued
Voluntary Seismic Retrofit In Accorddance With Plan Set A · Declared valuation: $4,000 · Contractor: Warner Custom Homes
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Electrical / panel permit application filed (B33505)
Current status: Issued
Install new 50 amp circuit for electric range — New Circuits / Outlets · Declared valuation: $1,250 · Contractor: Silveira Enterprise Inc
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Electrical / panel permit issued (B33505)
Recorded status: Issued
Install new 50 amp circuit for electric range — New Circuits / Outlets · Declared valuation: $1,250 · Contractor: Silveira Enterprise Inc
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
General repair permit application filed (173882)
Current status: Issued
Voluntary Seismic Retrofit In Accorddance With Plan Set A · Declared valuation: $4,000 · Contractor: Warner Custom Homes
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).
Issued after 5 mo — slower than 90% of plumbing / water heater / sewer permits in Unincorporated Marin (median 0d, 90th pct 0d, n=2,211).
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).
Active in "Issued" for 5.8 yr (first record Jan 29, 2021) with no new permit activity recorded in 5.8 yr.
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 |
|---|---|---|---|---|
| Owner Builder | Remodel / interior alteration | 1 on parcel12 in ½ mi | $962,800 | 226 vs 240 prior−6% |
| Northern Pacific Power | Solar / battery storage | 2 on parcel2 in ½ mi | $50,083 | 0 vs 0 prior |
| John Owens Services | HVAC / heat pump | 2 on parcel2 in ½ mi | $31,030 |
| 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 ($13,050/yr) + local voter-approved bond debt ($1,958/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.
−$67,757/yr
Cash needed: $287,100
NOI: $11,429/yr
P&I: $6,599/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 | −$6,020/mo | -25.2% | $11,393/mo | −$6,020/mo |
| Base (your inputs) | Your entered assumptions, 3.0%/yr rent growth | $3,250/mo | −$5,646/mo | -23.6% | $10,545/mo | −$5,462/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 | −$5,432/mo | -22.7% | $10,300/mo | −$5,038/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.
R/R 3 WINDOWS RETROFIT & 1 WINDOW NAIL FIN ALL LIKE FOR LIKE — Non-structural Door/Window Replacement
Install new heat pump and air handler system. — Replace Mechanical Appliance
Voluntary Seismic Retrofit In Accorddance With Plan Set A
Install new 50 amp circuit for electric range — New Circuits / Outlets
Replace existing gas water heater with 65 gallon heat pump water heater. — Replace Plumbing Fixtures(s)
Residential roof mount installation of a new 6.4kW solar PV system.
Residential installation of a new 10kWh energy storage system.
Upgrade electrical service from 100A to 200 amps. same location — Service Upgrade
Re-roof. Tear-off and dispose of existing tar and gravel roof layers to expose deck underneath. Supply and install new, metal standing seam roof system (with matching trims) over high temperature ice-and-water underlayment. — ReRoofing
Foundation & Dry-Rot Repairs T.D. 6/25/19
REPLACE FURNACE — Replace Mechanical Appliance
Replace 3 windows with retrofit vinyl windows — Non-structural Door/Window Replacement
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
0.19 acres
Assessor's classification for assessment purposes. This is not zoning.
456 OAK MANOR DR
Source: County of Marin GIS (MarinMap), Parcels · Geography: parcel · Retrieved Nov 13, 2026
Search by parcel number 174-043-10. Assessed value is not market value.
Search by parcel number 174-043-10 (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.
| 0 vs 0 prior |
| Silveira Enterprise | Electrical / panel | 2 on parcel2 in ½ mi | $7,750 | 0 vs 0 prior |
| Sure Roofing | Roof replacement | 1 on parcel1 in ½ mi | $47,880 | 0 vs 0 prior |
| Northwest Exteriors | Windows / doors / siding | 1 on parcel1 in ½ mi | $5,544 | 0 vs 0 prior |
| Gene Burch Plumbing Heating And Air | HVAC / heat pump | 1 on parcel1 in ½ mi | $4,847 | 0 vs 0 prior |
| Warner Custom Homes | General repair | 1 on parcel1 in ½ mi | $4,000 | 0 vs 0 prior |
| Home Depot USA | Windows / doors / siding | 1 on parcel1 in ½ mi | $3,277 | 0 vs 0 prior |
| Owner Recent nearby: 170 De Burgh Dr (Mar 4, 2022) | New garage / accessory structure | 9 in ½ mi | $405,000 | 25 vs 15 prior+67% |
| 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 |
| 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.