Lagunitas 94938 · Forest Knolls · APN 168-081-20 · Unincorporated Marin
Zoned RA-B4-SGV in Unincorporated Marin with likely ministerial ADU eligibility and mapped CAL FIRE high fire hazard severity zone (state responsibility area) due diligence; benchmark value $1,141,000 ($1,004,000–$1,278,000).
Zone RA-B4-SGV allows residential use qualifying for ministerial ADU review under state law.
Source: Unincorporated Marin zoning · CA Gov. Code 66314
Public building records show issued construction/renovation work on this parcel (1 total permit, latest Sep 24, 2024).
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: 3 permitted.
3 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.
66 permits within ½ mile since November 2024
$1,141,000
Benchmark range: $1,004,000 – $1,278,000
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)
Closest lead: New home (0.4 mi W, entitled). 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 (~$1,131/mo). Confirm exact Mello-Roos / CFD special assessments on the county tax bill.
Source: CA Const. Art. XIIIA (Prop 13) · County Tax Collector
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 RA-B4-SGV 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 12.8 yr (first record Feb 10, 2014), with no completion or new permit record in 12.8 yr. · $300 declared valuation
Permit issued and active for 12.3 yr (first record Aug 11, 2014), with no completion or new permit record in 11.8 yr. · 1 unit · $222,000 declared valuation
Permit issued and active for 9.9 yr (first record Dec 28, 2016), with no completion or new permit record in 8.9 yr. · $8,000 declared valuation
Permit issued and active for 11.7 yr (first record Feb 26, 2015), with no completion or new permit record in 8.7 yr. · 1 unit · $79,000 declared valuation
In "Applied" for 7.8 yr (since Feb 7, 2019), with no new permit record in 7.8 yr. · 1 unit · $187,000 declared valuation
Permit issued and active for 9.4 yr (first record Jun 14, 2017), with no completion or new permit record in 7.5 yr. · 1 unit · $165,000 declared valuation
Nearby other (10 Redonda Ave): First appeared in published agency feed
Record B48895 · Detected between snapshots
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Snapshot diff within ½ mile
Nearby roof replacement (259 Castro St): First appeared in published agency feed
Record B48919 · Detected between snapshots
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Snapshot diff within ½ mile
Nearby other (2 Juarez Ave): First appeared in published agency feed
Record B48908 · 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 $980,329 in September 2025 to $1,044,557 in September 2026.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94938 (not a parcel appraisal)
5 Chaparro Ave · 1 unit · $35,000 valuation
Records span Jul 12, 2023 to Jun 5, 2026 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
6956 Sir Francis Drake Blvd (J A D U 6956a & A D U 6956b) · 1 unit · $400,000 valuation
Records span Mar 6, 2024 to Apr 23, 2026 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Annual ZIP 94938 home-value index checkpoint
Changed from $1,021,850 in September 2024 to $980,329 in September 2025.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94938 (not a parcel appraisal)
152 Alta Ave · 1 unit · $677,200 valuation
Records span Apr 1, 2025 to Sep 10, 2025 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
1 unit
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Annual ZIP 94938 home-value index checkpoint
Changed from $1,003,796 in September 2023 to $1,021,850 in September 2024.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94938 (not a parcel appraisal)
Solar / battery storage permit application filed (B39590)
Current status: Issued
Installation of a 7.98 kW Roof-Mounted Solar PV System consisting of (19) Modules, (1) 13.5 kWh Tesla Powerwall Battery with integrated Inverter, and (1) Main Panel Upgrade to 225A with a 200A Main Breaker. · Declared valuation: $30,000 · Contractor: Solar Optimum Inc
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Solar / battery storage permit issued (B39590)
Recorded status: Issued
Installation of a 7.98 kW Roof-Mounted Solar PV System consisting of (19) Modules, (1) 13.5 kWh Tesla Powerwall Battery with integrated Inverter, and (1) Main Panel Upgrade to 225A with a 200A Main Breaker. · Declared valuation: $30,000 · Contractor: Solar Optimum Inc
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
6956 Sir Francis Drake Blvd · $26,000 valuation
Records span Jan 10, 2024 to Feb 28, 2024 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Annual ZIP 94938 home-value index checkpoint
Changed from $1,041,583 in September 2022 to $1,003,796 in September 2023.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94938 (not a parcel appraisal)
Annual ZIP 94938 home-value index checkpoint
Changed from $997,851 in September 2021 to $1,041,583 in September 2022.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94938 (not a parcel appraisal)
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 →In "Entitled" for 2.1 yr (since Oct 4, 2024), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
In "Applied" for 7.8 yr (since Feb 7, 2019), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
Active in "Issued" for 9.4 yr (first record Jun 14, 2017) with no new permit activity recorded in 7.5 yr.
Active in "Issued" for 12.3 yr (first record Aug 11, 2014) with no new permit activity recorded in 11.8 yr.
Active in "Issued" for 2.8 yr (first record Jan 10, 2024) with no new permit activity recorded in 2.7 yr.
Active in "Issued" for 12.8 yr (first record Feb 10, 2014) with no new permit activity recorded in 12.8 yr.
| Builder / contractor | Primary specialty | Here / ½ mi | ½ mi valuation | Citywide 24m trend |
|---|---|---|---|---|
| Solar Optimum | Solar / battery storage | 1 on parcel1 in ½ mi | $30,000 | 0 vs 0 prior |
| Owner Builder Recent nearby: 5 Chaparro Ave (Jun 5, 2026) | Accessory dwelling unit (new or conversion) | 9 in ½ mi | $1,942,201 | 226 vs 240 prior−6% |
| Owner Recent nearby: 8 Morelos Ave (Oct 8, 2020) | Remodel / interior alteration |
| 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 94938
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 ($11,400/yr) + local voter-approved bond debt ($1,710/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.
−$56,776/yr
Cash needed: $250,800
NOI: $12,397/yr
P&I: $5,764/mo
For $0/mo net cash flow
At $3,150/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 | $2,898/mo | −$5,093/mo | -24.4% | $10,008/mo | −$5,085/mo |
| Base (your inputs) | Your entered assumptions, 3.0%/yr rent growth | $3,150/mo | −$4,731/mo | -22.6% | $9,263/mo | −$4,544/mo |
| Optimistic (cap-limited) | +6% starting rent, 3% vacancy, 4.5%/yr rent growth (capped by AB 1482 ceiling of 8.6%/yr) | $3,339/mo | −$4,524/mo | -21.6% | $9,048/mo | −$4,133/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.
Installation of a 7.98 kW Roof-Mounted Solar PV System consisting of (19) Modules, (1) 13.5 kWh Tesla Powerwall Battery with integrated Inverter, and (1) Main Panel Upgrade to 225A with a 200A Main Breaker.
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
0.68 acres
Assessor's classification for assessment purposes. This is not zoning.
134 ARROYO RD
Source: County of Marin GIS (MarinMap), Parcels · Geography: parcel · Retrieved Nov 13, 2026
Search by parcel number 168-081-20. Assessed value is not market value.
Search by parcel number 168-081-20 (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.
| 9 in ½ mi |
| $418,670 |
| 25 vs 15 prior+67% |
| Zia Designs Recent nearby: 2 Juarez Ave (Dec 6, 2017) | Demolition | 2 in ½ mi | $163,000 | 0 vs 0 prior |
| Rebuilding Together East Bay Network Recent nearby: 6956 Sir Francis Drake Blvd (J A D U 6956a & A D U 6956b) (Apr 23, 2026) | Accessory dwelling unit (new or conversion) | 1 in ½ mi | $400,000 | 0 vs 0 prior |
| Traditional Trades Recent nearby: 190 E Cintura Ave. (Sep 4, 2019) | Addition (adds square footage) | 1 in ½ mi | $245,000 | 0 vs 0 prior |
| Hope Construction Recent nearby: 42 Arroyo Rd (Feb 2, 2015) | New single-family home | 1 in ½ mi | $222,000 | 0 vs 1 prior |
| Brownco Construction And Dev Recent nearby: 145 Tamal Rd (Apr 2, 2020) | Commercial tenant improvement | 1 in ½ mi | $150,000 | 0 vs 1 prior |
| Raddue Construction Recent nearby: 28 Resaca Ave (Sep 18, 2017) | Addition (adds square footage) | 1 in ½ mi | $150,000 | 0 vs 0 prior |
| 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 |
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.