San Anselmo 94960 · Sleepy Hollow · APN 176-350-03 · Unincorporated Marin
Zoned RSP-0.56 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 $1,815,000 ($1,597,000–$2,033,000).
Zoned RSP-0.56 supports ministerial ADU/JADU review plus SB 9 both two-unit development and ministerial urban lot split on a 114,214 sq ft lot. Local precedent is active with 2 ADU permits within ¼ mile over the last 36 months.
Source: Unincorporated Marin zoning · CA Gov. Code 66314 & 65852.21
Public building records show issued construction/renovation work on this parcel (5 total permits, latest Jun 26, 2025).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (parcel APN)
32 substantial renovation & housing permits over 24 months (32.7 per 1,000 parcels vs. 16.4 citywide baseline) (#4 of 22 neighborhoods).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (Sleepy Hollow)
Automated synthesis of indexed municipal, county, state, and federal public records — informational context only, not a formal appraisal, survey, or legal/tax determination.
$1,815,000
Benchmark range: $1,597,000 – $2,033,000
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)
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)
Solar / battery storage (179508): Issued after 2 mo — slower than 90% of solar / battery storage permits in Unincorporated Marin (median 0d, 90th pct 2d, n=2,977).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (review-time benchmark)
Closest lead: New home at 99 Garden Rock Rd (0.31 mi NE, applied). Inspect timeline history before assuming near-term completion.
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · HCD APR (½-mile radius)
Since November 2024 within ½ mile: 1 permitted.
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.
122 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
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.
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 RSP-0.56 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.
In "Applied" for 12.2 yr (since Aug 28, 2014), with no new permit record in 12.2 yr. · $15,000 declared valuation
Permit issued and active for 7.4 yr (first record Jun 27, 2019), with no completion or new permit record in 6.8 yr. · 1 unit · $175,000 declared valuation
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 "Applied" for 5.4 yr (since Jun 8, 2021), with no new permit record in 5.4 yr. · 1 unit · $15,000 declared valuation
In "Applied" for 4.6 yr (since Mar 31, 2022), with no new permit record in 4.6 yr. · 1 unit · $196,000 declared valuation
Permit issued and active for 3.6 yr (first record Apr 5, 2023), with no completion or new permit record in 3.3 yr. · 1 unit · $292,000 declared valuation
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 addition (adds square footage) (15 Estates Dr): Contractor changed from STEVE REMPE GENERAL CONTRACTOR INC to REMPE CONSTRUCTION
Record 182713 · Detected between snapshots
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Snapshot diff within ½ mile
Nearby electrical / panel (185 Van Winkle Dr): First appeared in published agency feed
Record B48979 · Detected between snapshots
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Snapshot diff within ½ mile
Nearby plumbing / water heater / sewer (5 Dutch Valley Ln): First appeared in published agency feed
Record B48882 · 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 $1,602,637 in September 2025 to $1,702,818 in September 2026.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94960 (not a parcel appraisal)
Annual ZIP 94960 home-value index checkpoint
Changed from $1,657,204 in September 2024 to $1,602,637 in September 2025.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94960 (not a parcel appraisal)
Solar / battery storage permit issued (179508)
Recorded status: Issued
Replace Ground Mt System And Upgrade E S S, Replace Existing Ground Mounted Solar Array For 61.2 Kw System And Upgrade Ess To 300kwh · Declared valuation: $512,474 · Contractor: Symmetric Energy Inc
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Solar / battery storage permit application filed (179508)
Current status: Issued
Replace Ground Mt System And Upgrade E S S, Replace Existing Ground Mounted Solar Array For 61.2 Kw System And Upgrade Ess To 300kwh · Declared valuation: $512,474 · Contractor: Symmetric Energy Inc
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
135 Tarry Rd (Aka 135 A) · 1 unit · $325,000 valuation
Records span Aug 13, 2024 to Apr 2, 2025 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
125 Tarry Rd (Adu 125a) · 1 unit · $40,000 valuation
Records span Mar 28, 2024 to Oct 21, 2024 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Annual ZIP 94960 home-value index checkpoint
Changed from $1,652,687 in September 2023 to $1,657,204 in September 2024.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94960 (not a parcel appraisal)
60 Tarry Rd (Aka 60 A) · 1 unit · $391,060 valuation
Records span Jun 9, 2023 to Dec 7, 2023 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
99 Garden Rock Rd · 1 unit · $1,200,000 valuation
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Annual ZIP 94960 home-value index checkpoint
Changed from $1,730,005 in September 2022 to $1,652,687 in September 2023.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94960 (not a parcel appraisal)
133 Van Winkle Dr (Aka 135) · 1 unit · $60,000 valuation
Records span Apr 13, 2023 to Sep 14, 2023 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
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 "Applied" for 3.1 yr (since Oct 11, 2023), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121). High-impact scale (1 housing unit, $1,200,000 declared valuation across 1 permit).
Issued after 2 mo — slower than 90% of solar / battery storage permits in Unincorporated Marin (median 0d, 90th pct 2d, n=2,977).
In "Applied" for 12.2 yr (since Aug 28, 2014), exceeding the 55d median and 261d 90th percentile for demolition permits in Unincorporated Marin (n=130).
In "Applied" for 4.6 yr (since Mar 31, 2022), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
In "Applied" for 5.4 yr (since Jun 8, 2021), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
Active in "Issued" for 2.6 yr (first record Mar 28, 2024) with no new permit activity recorded in 2.1 yr.
Substantial improvements (additions, interior remodels, ADUs, commercial TI, and new builds) across 980 parcels
−11.8% YoY
City baseline: 16.4 / 1k
32 in trailing 24m
Includes 5 ADUs
| Builder / contractor | Primary specialty | Here / ½ mi | ½ mi valuation | Citywide 24m trend |
|---|---|---|---|---|
| Symmetric Energy | Solar / battery storage | 1 on parcel1 in ½ mi | $512,474 | 0 vs 0 prior |
| Greener Excavations | General repair | 1 on parcel1 in ½ mi | $220,000 | 0 vs 0 prior |
| American Solar | Solar / battery storage | 1 on parcel1 in ½ mi | $16,250 | 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) |
| Addition (adds square footage) |
HUD Small Area Fair Market Rent · ZIP 94960
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 ($18,150/yr) + local voter-approved bond debt ($2,723/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.
−$100,853/yr
Cash needed: $399,300
NOI: $9,279/yr
P&I: $9,178/mo
For $0/mo net cash flow
At $3,650/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 | $3,358/mo | −$8,824/mo | -26.5% | $15,675/mo | −$8,848/mo |
| Base (your inputs) | Your entered assumptions, 3.0%/yr rent growth | $3,650/mo | −$8,404/mo | -25.3% | $14,508/mo | −$8,222/mo |
| Optimistic (cap-limited) | +6% starting rent, 3% vacancy, 4.5%/yr rent growth (capped by AB 1482 ceiling of 8.6%/yr) | $3,869/mo | −$8,164/mo | -24.5% | $14,172/mo | −$7,745/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.
Replace Ground Mt System And Upgrade E S S, Replace Existing Ground Mounted Solar Array For 61.2 Kw System And Upgrade Ess To 300kwh
Install a new 100 amp 120/240 volt 2 pole transfer switch with a temporary connection box for a generator for existing emergency panels- Currently the emergency panels are being feed from a battery array. This transfer switch and connector box would be used to connect a portable generator in case of battery failure. — Service Upgrade
Retaining Wall Stabilization***Extended To 10/26/18
Replace & Install 2 Electric Water Heaters ***Refund Processed 7/15/15
Rf Mtd P V Sys 16.9 K W - Express ***Extended To 4/17/18
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
2.62 acres
Assessor's classification for assessment purposes. This is not zoning.
1 TRIPLE C RANCH RD; 3 TRIPLE C RANCH RD; 5 TRIPLE C RANCH RD
Source: County of Marin GIS (MarinMap), Parcels · Geography: parcel · Retrieved Nov 13, 2026
Search by parcel number 176-350-03. Assessed value is not market value.
Search by parcel number 176-350-03 (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.
| Artistic Lighting And Electric | Solar / battery storage | 1 on parcel1 in ½ mi | $14,000 | 0 vs 0 prior |
| Ongaro Ernest And Sons | Plumbing / water heater / sewer | 1 on parcel1 in ½ mi | $5,006 | 0 vs 0 prior |
| Owner Builder Recent nearby: 4 Whiteplains Ct (Jun 23, 2023) | Remodel / interior alteration | 11 in ½ mi | $1,924,500 | 226 vs 240 prior−6% |
| Owner Recent nearby: 2 Triple C Ranch Rd (Feb 24, 2020) | New garage / accessory structure | 7 in ½ mi | $254,500 | 25 vs 15 prior+67% |
| Cedar House Construction Recent nearby: 175 Van Winkle Dr (May 19, 2020) | New garage / accessory structure | 6 in ½ mi | $294,200 | 0 vs 0 prior |
| Dotto Construction Recent nearby: 125 Tarry Rd (Dec 4, 2024) | Remodel / interior alteration | 4 in ½ mi | $950,000 | 1 vs 9 prior−89% |
| Levine Design And Construction Recent nearby: 145 Crane Dr (May 16, 2016) | New garage / accessory structure | 4 in ½ mi | $760,000 | 1 vs 4 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 |
| Plumbing / water heater / sewerOn this parcel | 2,211 | 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.