San Anselmo 94960 · Sleepy Hollow · APN 176-191-13 · Unincorporated Marin
Zoned R1-BD 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 $2,009,000 ($1,768,000–$2,250,000).
Zoned R1-BD supports ministerial ADU/JADU review plus SB 9 both two-unit development and ministerial urban lot split on a 45,956 sq ft lot. Local precedent is active with 3 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 (10 total permits, latest Aug 12, 2021).
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.
Since November 2024 within ½ mile: 2 permitted, 1 proposed or in review.
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.
172 permits within ½ mile since November 2024
$2,009,000
Benchmark range: $1,768,000 – $2,250,000
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)
New garage / accessory structure (84468): Pending in review for 7.1 yr (15.8× the 164d median) — slower than 90% of new garage / accessory structure permits in Unincorporated Marin (median 164d, 90th pct 485d, n=356).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (review-time benchmark)
Closest lead: New home at 830 Butterfield Rd (0.19 mi NE, 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.
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-BD 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 12.9 yr (first record Dec 24, 2013), with no completion or new permit record in 12.4 yr. · 1 unit · $800,000 declared valuation
Permit issued and active for 10.2 yr (first record Aug 23, 2016), with no completion or new permit record in 10.1 yr. · $10,000 declared valuation
Permit issued and active for 8.7 yr (first record Feb 14, 2018), with no completion or new permit record in 8.7 yr. · 1 unit
In "Entitled" for 8.2 yr (since Sep 7, 2018), with no new permit record in 8.2 yr. · 1 unit
Permit issued and active for 8.3 yr (first record Aug 9, 2018), with no completion or new permit record in 7.6 yr. · 1 unit · $1,097,000 declared valuation
Permit issued and active for 7.7 yr (first record Feb 21, 2019), with no completion or new permit record in 7.5 yr. · 1 unit · $35,000 declared valuation
Nearby roof replacement (150 W Oak Knoll Dr): First appeared in published agency feed
Record B49088 · Detected between snapshots
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Snapshot diff within ½ mile
Nearby plumbing / water heater / sewer (980 Butterfield Rd): First appeared in published agency feed
Record B49066 · Detected between snapshots
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Snapshot diff within ½ mile
Nearby pool / spa (111 Deer Hollow Rd): First appeared in published agency feed
Record 94635 · Detected between snapshots
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Snapshot diff within ½ mile
Nearby other (2 Michael Way): First appeared in published agency feed
Record B48977 · Detected between snapshots
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Snapshot diff within ½ mile
Nearby ev charger (50 Van Hooten Ct): First appeared in published agency feed
Record B48946 · Detected between snapshots
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Snapshot diff within ½ mile
Nearby electrical / panel (150 W Oak Knoll Dr): First appeared in published agency feed
Record B48927 · Detected between snapshots
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Snapshot diff within ½ mile
Nearby other (111 Deer Hollow Rd): First appeared in published agency feed
Record B48924 · 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)
45 Oak Knoll Dr · 1 unit · $100,000 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 $1,657,204 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)
1 unit
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
196 Deer Hollow Rd (Adu 196a) · 1 unit · $150,000 valuation
Records span Sep 6, 2024 to Aug 28, 2025 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
33 Fawn Dr · 1 unit · $900,000 valuation
Records span Sep 1, 2023 to Oct 7, 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)
854 Butterfield Ln · $500 valuation
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 →Pending in review for 7.1 yr (15.8× the 164d median) — slower than 90% of new garage / accessory structure permits in Unincorporated Marin (median 164d, 90th pct 485d, n=356).
Pending in review for 9.1 yr (39.8× the 83d median) — slower than 90% of general repair permits in Unincorporated Marin (median 83d, 90th pct 328d, n=693).
Pending in review for 9.1 yr (16.2× the 204d median) — slower than 90% of accessory dwelling unit (new or conversion) permits in Unincorporated Marin (median 204d, 90th pct 549d, n=298).
Active in "Issued" for 8.3 yr (first record Aug 9, 2018) with no new permit activity recorded in 7.6 yr. High-impact scale (1 housing unit, $1,097,000 declared valuation across 2 permits).
High-impact scale (1 housing unit, $987,000 declared valuation across 3 permits).
Active in "Issued" for 12.9 yr (first record Dec 24, 2013) with no new permit activity recorded in 12.4 yr. High-impact scale (1 housing unit, $800,000 declared valuation across 1 permit).
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 |
|---|---|---|---|---|
| Build Acme | New single-family home | 1 on parcel1 in ½ mi | $987,000 | 0 vs 0 prior |
| Herbs Pool Service | Plumbing / water heater / sewer | 1 on parcel1 in ½ mi | $39,623 | 0 vs 4 prior |
| Semper Solaris | Solar / battery storage | 1 on parcel1 in ½ mi | $33,580 | 0 |
| Permit category | Sample (n) | 25th pct | Median (50th) | 75th pct | 90th pct | Recent 24m median |
|---|---|---|---|---|---|---|
| New single-family homeOn this parcel | 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 |
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 ($20,100/yr) + local voter-approved bond debt ($3,015/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.
−$114,928/yr
Cash needed: $442,200
NOI: $7,036/yr
P&I: $10,164/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 | −$9,997/mo | -27.1% | $17,312/mo | −$10,036/mo |
| Base (your inputs) | Your entered assumptions, 3.0%/yr rent growth | $3,650/mo | −$9,577/mo | -26.0% | $16,024/mo | −$9,410/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 | −$9,337/mo | -25.3% | $15,652/mo | −$8,934/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.
Finaled / completed1 unitsOct 23, 2017 – Jan 26, 2022
We group related permits and State housing reports into projects. That grouping is our inference, not an official record.
Installation of 1 Tesla Powerwall, 1 125A Selected Load Center and 1 Tesla Backup Gateway.
9.2kw Rooftop Photovoltaic
Remodel/Replaster Pool. To Include New Wtr Line
Parking Deck (Adu & Ret Wall Undr Sep Permit In Same Plan Set)
Ret Wall - Property Line
S F D; Decks; Covered Porch; Mech Rm
Ret Wall - Lawn
Demo House In Prep For New House - J#5e494***Expired
Ret Wall In Front Of 2nd Unit (Adu & Prkg Deck Under Sep Permits On Same Plan Set)
2nd Unit; Deck; Storage ( Ret Wall & Pkg Deck Undr Sep Permits In Same Plan Set)
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.
| Report year | Project / record | Type | Entitled | Permitted | Completed | Deed-restricted |
|---|---|---|---|---|---|---|
| 2022 | —(159015) | SFD · Owner | — | — | 1 (Jan 26, 2022) | — |
| 2018 | —(159015) | SFD · Owner | — | 1 (Jul 11, 2018) | — | — |
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
1.06 acres
Assessor's classification for assessment purposes. This is not zoning.
30 FORREST CT
Source: County of Marin GIS (MarinMap), Parcels · Geography: parcel · Retrieved Nov 13, 2026
Search by parcel number 176-191-13. Assessed value is not market value.
Search by parcel number 176-191-13 (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.
| Semper Solaris Construction | Other | 1 on parcel1 in ½ mi | $27,800 | 0 vs 0 prior |
| Owner Builder Recent nearby: 39 Legend Rd (Jun 1, 2026) | Remodel / interior alteration | 30 in ½ mi | $2,833,976 | 226 vs 240 prior−6% |
| Owner Recent nearby: 196 Deer Hollow Rd (Adu 196a) (Aug 28, 2025) | Remodel / interior alteration | 11 in ½ mi | $915,995 | 25 vs 15 prior+67% |
| Drake Building Recent nearby: 30 Fawn Ct (Mar 24, 2022) | Remodel / interior alteration | 5 in ½ mi | $655,000 | 1 vs 2 prior |
| Summit Professional Builders Recent nearby: 100 W Oak Knoll Dr (Sep 23, 2020) | New garage / accessory structure | 4 in ½ mi | $1,563,520 | 0 vs 0 prior |
| First Impressions Painting And Building Recent nearby: 80 Oak Knoll Dr (Sep 7, 2022) | Remodel / interior alteration | 4 in ½ mi | $364,000 | 0 vs 0 prior |
| Schalich Brothers Construction Recent nearby: 1 Fawn Ct (Nov 17, 2020) | Demolition | 3 in ½ mi | $1,645,000 | 7 vs 1 prior |
| 159d(vs 205d prior) |
| Accessory dwelling unit (new or conversion)On this parcel | 298 | 120d | 204d | 331d | 549d | 214d(vs 181d prior) |
| DemolitionOn this parcel | 130 | 11d | 55d | 106d | 261d | 80d(vs 56d prior) |
| Addition (adds square footage) | 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) |
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.