San Quentin 94964 · San Quentin · APN 018-211-15 · Unincorporated Marin
Zoned RSP-5.8-BFC in Unincorporated Marin with likely ADU & SB 9 infill eligibility and zero mapped flood, fire, or fault hazard overlaps; benchmark value $1,592,000 ($1,353,000–$1,831,000).
Zoned RSP-5.8-BFC supports ministerial ADU/JADU review plus SB 9 both two-unit development and ministerial urban lot split on a 5,009 sq ft lot.
Source: Unincorporated Marin zoning · CA Gov. Code 66314 & 65852.21
Public building records show issued construction/renovation work on this parcel (3 total permits, latest Apr 10, 2023).
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.
12 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
$1,592,000
Benchmark range: $1,353,000 – $1,831,000
Closest lead: New home at 22 Mckenzie St (250 ft N, 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)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$1,563/mo). Confirm exact Mello-Roos / CFD special assessments on the county tax bill.
Source: CA Const. Art. XIIIA (Prop 13) · County Tax Collector
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-5.8-BFC 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 3.9 yr (first record Dec 27, 2022), with no completion or new permit record in 2.8 yr. · 1 unit · $850,000 declared valuation
Nearby remodel / interior alteration (130 Le Cante Dr): Contractor changed from (blank) to BOLT DOWN THE BAY AREA
Record 182711 · Detected between snapshots
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Snapshot diff within ½ mile
1 housing unit completed (90268)
Reported in 2025 Housing Element Annual Progress Report
ADU · Renter
Source: California HCD, Housing Element Annual Progress Report — Table A2 · Geography: parcel
22 Mckenzie St · 1 unit · $850,000 valuation
Records span Dec 27, 2022 to Jan 22, 2024 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Building permit reported to State HCD for 1 housing unit (90268)
Reported in 2025 Housing Element Annual Progress Report
ADU · Renter
Source: California HCD, Housing Element Annual Progress Report — Table A2 · Geography: parcel
Building permit reported to State HCD for 1 housing unit (90268)
Reported in 2023 Housing Element Annual Progress Report
ADU · Renter
Source: California HCD, Housing Element Annual Progress Report — Table A2 · Geography: parcel
Accessory dwelling unit (new or conversion) permit issued (173755)
Recorded status: Issued
Convert [E] Basement/Crawlspace To [N] Adu · Declared valuation: $225,000 · 1 housing unit · Contractor: Kearney Construction Llc
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Accessory dwelling unit (new or conversion) permit application filed (173755)
Current status: Issued
Convert [E] Basement/Crawlspace To [N] Adu · Declared valuation: $225,000 · Contractor: Kearney Construction Llc
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
General repair permit issued (159330)
Recorded status: Issued
Replacing Stairs & Add C-Channel To Small 4x4 T.D. 7/31/18 · Declared valuation: $2,500 · Contractor: Wood Duck Building
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
General repair permit application filed (159330)
Current status: Issued
Replacing Stairs & Add C-Channel To Small 4x4 T.D. 7/31/18 · Declared valuation: $2,500 · Contractor: Wood Duck Building
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Electrical / panel permit issued (144745)
Recorded status: Issued
Receptacle For Car Charger · Declared valuation: $1,500 · Contractor: Owner
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 3.9 yr (first record Dec 27, 2022) with no new permit activity recorded in 2.8 yr. High-impact scale (1 housing unit, $850,000 declared valuation across 1 permit).
| Builder / contractor | Primary specialty | Here / ½ mi | ½ mi valuation | Citywide 24m trend |
|---|---|---|---|---|
| Owner | Electrical / panel | 1 on parcel2 in ½ mi | $11,500 | 25 vs 15 prior+67% |
| Kearney Construction | Accessory dwelling unit (new or conversion) | 1 on parcel1 in ½ mi | $225,000 | 2 vs 3 prior |
| Wood Duck Building | General repair | 1 on parcel1 in ½ mi | $2,500 | 0 vs 0 prior |
| James Flanagan Builder Recent nearby: 18 (A) Main St (Nov 15, 2017) | New garage / accessory structure | 2 in ½ mi | $56,000 |
| 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)On this parcel | 298 | 120d | 204d | 331d | 549d | 214d(vs 181d prior) |
HUD Small Area Fair Market Rent · ZIP 94964
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 ($15,900/yr) + local voter-approved bond debt ($2,385/yr) + fixed direct levies/Mello-Roos ($450/yr).
Insurance & hazard context:
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.
−$83,060/yr
Cash needed: $349,800
NOI: $13,418/yr
P&I: $8,040/mo
For $0/mo net cash flow
At $3,675/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 | $3,381/mo | −$7,344/mo | -25.2% | $13,632/mo | −$7,338/mo |
| Base (your inputs) | Your entered assumptions, 3.0%/yr rent growth | $3,675/mo | −$6,922/mo | -23.7% | $12,618/mo | −$6,707/mo |
| Optimistic (cap-limited) | +6% starting rent, 3% vacancy, 4.5%/yr rent growth (capped by AB 1482 ceiling of 8.6%/yr) | $3,896/mo | −$6,679/mo | -22.9% | $12,325/mo | −$6,227/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 unitsAug 29, 2022 – Apr 10, 2023
We group related permits and State housing reports into projects. That grouping is our inference, not an official record.
Convert [E] Basement/Crawlspace To [N] Adu
Replacing Stairs & Add C-Channel To Small 4x4 T.D. 7/31/18
Receptacle For Car Charger
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 |
|---|---|---|---|---|---|---|
| 2025 | —(90268) | ADU · Renter | — | 1 (Apr 10, 2023) | 1 (Mar 11, 2025) | — |
| 2023 | —(90268) | ADU · Renter | — | 1 (Apr 10, 2023) | — | — |
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
0.11 acres
Assessor's classification for assessment purposes. This is not zoning.
38A MAIN ST; 38 MAIN ST
Source: County of Marin GIS (MarinMap), Parcels · Geography: parcel · Retrieved Nov 13, 2026
Search by parcel number 018-211-15. Assessed value is not market value.
Search by parcel number 018-211-15 (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 1 prior |
| Rodd Renovations Recent nearby: 22 Mckenzie St (Jan 22, 2024) | New single-family home | 1 in ½ mi | $850,000 | 0 vs 0 prior |
| Bolt Down The Bay Area Recent nearby: 130 Le Cante Dr (Oct 12, 2026) | Remodel / interior alteration | 1 in ½ mi | $287,000 | 5 vs 0 prior |
| Guthrie Construction Recent nearby: 80 Heron Ct (Mar 7, 2024) | Remodel / interior alteration | 1 in ½ mi | $196,000 | 0 vs 3 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) |
| Electrical / panelOn this parcel | 3,019 | 0d | 0d | 0d | 2d | 0d |
| General repairOn this parcel | 693 | 38d | 83d | 181d | 328d | 97d(vs 66d 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.