Woodacre 94973 · Woodacre · APN 172-051-31 · Unincorporated Marin
Zoned R1-B2-SGV in Unincorporated Marin with likely ministerial ADU eligibility and mapped FEMA A flood / CAL FIRE high fire hazard severity zone (state responsibility area) due diligence; benchmark value $1,203,000 ($1,059,000–$1,347,000).
Zone R1-B2-SGV allows residential use qualifying for ministerial ADU review under state law.
Source: Unincorporated Marin zoning · CA Gov. Code 66314
On-parcel permit history is indexed through Jun 10, 2026, letting you verify roof, HVAC, electrical, or structural work against seller disclosures.
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (parcel APN)
Zone A: 1% annual chance flood (Special Flood Hazard Area) overlaps this parcel. Expect mandatory flood insurance for federally backed loans and floodplain elevation/mitigation rules for new units or SB 9 applications.
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.
57 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.
$1,203,000
Benchmark range: $1,059,000 – $1,347,000
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)
Accessory dwelling unit at 209 San Geronimo Valley Dr: In "Applied" for 6.3 yr (since Jul 28, 2020), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (review-time benchmark)
Closest lead: Demolition at 0 Sylvan Way (0.14 mi S, 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)
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-B2-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.
In "Applied" for 6.3 yr (since Jul 28, 2020), with no new permit record in 6.3 yr. · 1 unit · $35,000 declared valuation
Permit issued and active for 14.6 yr (first record Mar 27, 2012), with no completion or new permit record in 12.7 yr. · 1 unit · $318,000 declared valuation
Permit issued and active for 13.5 yr (first record May 6, 2013), with no completion or new permit record in 12.6 yr. · $73,612 declared valuation
Permit issued and active for 7.3 yr (first record Jul 11, 2019), with no completion or new permit record in 7.2 yr. · 1 unit · $225,000 declared valuation
Permit issued and active for 4.8 yr (first record Jan 21, 2022), with no completion or new permit record in 4.7 yr. · $31,000 declared valuation
Permit issued and active for 3.5 yr (first record May 15, 2023), with no completion or new permit record in 3.5 yr. · 1 unit · $8,000 declared valuation
Nearby windows / doors / siding (74 Carson Rd): First appeared in published agency feed
Record B48966 · 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 $1,065,244 in September 2025 to $1,116,587 in September 2026.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94973 (not a parcel appraisal)
Other permit application filed (B47105)
Current status: Issued
Replace Mechanical Appliance · Declared valuation: $8,810 · Contractor: Bellows Plumbing Heating & Air Inc
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Other permit issued (B47105)
Recorded status: Issued
Replace Mechanical Appliance · Declared valuation: $8,810 · Contractor: Bellows Plumbing Heating & Air Inc
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Annual ZIP 94973 home-value index checkpoint
Changed from $1,061,933 in September 2024 to $1,065,244 in September 2025.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94973 (not a parcel appraisal)
Annual ZIP 94973 home-value index checkpoint
Changed from $1,063,265 in September 2023 to $1,061,933 in September 2024.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94973 (not a parcel appraisal)
0 Sylvan Way
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Annual ZIP 94973 home-value index checkpoint
Changed from $1,129,016 in September 2022 to $1,063,265 in September 2023.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94973 (not a parcel appraisal)
156 Central Ave · 1 unit · $8,000 valuation
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Annual ZIP 94973 home-value index checkpoint
Changed from $1,055,668 in September 2021 to $1,129,016 in September 2022.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94973 (not a parcel appraisal)
2 Maple Rd · 1 unit · $925,000 valuation
Records span Jun 17, 2021 to Jun 10, 2022 (2 permits).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
90 Carson Rd · $31,000 valuation
Records span Jan 21, 2022 to Mar 10, 2022 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Annual ZIP 94973 home-value index checkpoint
Changed from $891,844 in September 2020 to $1,055,668 in September 2021.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94973 (not a parcel appraisal)
143 Carson Rd · 1 unit · $130,000 valuation
Records span Feb 2, 2021 to Apr 21, 2021 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
EV charger permit application filed (B25069)
Current status: Issued
Install new 200 amp main panel. Install new exterior sub panel at garage Install new EV charger Remove sub panel in closet main house. — Service Upgrade, EV Charging Station · Declared valuation: $17,000 · Contractor: Auto Charge Electric Inc
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 →In "Applied" for 6.3 yr (since Jul 28, 2020), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
Pending in review for 6.3 yr (11.3× the 204d median) — slower than 90% of accessory dwelling unit (new or conversion) permits in Unincorporated Marin (median 204d, 90th pct 549d, n=298).
In "Applied" for 2.6 yr (since Apr 22, 2024), exceeding the 55d median and 261d 90th percentile for demolition permits in Unincorporated Marin (n=130).
Active in "Issued" for 7.3 yr (first record Jul 11, 2019) with no new permit activity recorded in 7.2 yr.
Active in "Issued" for 13.5 yr (first record May 6, 2013) with no new permit activity recorded in 12.6 yr.
Active in "Issued" for 3.5 yr (first record May 15, 2023) with no new permit activity recorded in 3.5 yr.
| Builder / contractor | Primary specialty | Here / ½ mi | ½ mi valuation | Citywide 24m trend |
|---|---|---|---|---|
| Auto Charge Electric | EV charger | 1 on parcel1 in ½ mi | $17,000 | 0 vs 0 prior |
| Bellows Plumbing Heating And Air | Other | 1 on parcel1 in ½ mi | $8,810 | 0 vs 0 prior |
| Aztec Roofing | Roof replacement | 1 on parcel1 in ½ mi | $5,500 | 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)On this parcel | 298 | 120d | 204d | 331d | 549d | 214d(vs 181d prior) |
HUD Small Area Fair Market Rent · ZIP 94973
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 ($12,050/yr) + local voter-approved bond debt ($1,808/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.
−$62,629/yr
Cash needed: $265,100
NOI: $10,489/yr
P&I: $6,093/mo
For $0/mo net cash flow
At $3,025/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 | $2,783/mo | −$5,567/mo | -25.2% | $10,553/mo | −$5,568/mo |
| Base (your inputs) | Your entered assumptions, 3.0%/yr rent growth | $3,025/mo | −$5,219/mo | -23.6% | $9,768/mo | −$5,049/mo |
| Optimistic (cap-limited) | +6% starting rent, 3% vacancy, 4.5%/yr rent growth (capped by AB 1482 ceiling of 8.6%/yr) | $3,207/mo | −$5,019/mo | -22.7% | $9,541/mo | −$4,654/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.
Applied1 unitsJul 28, 2020 – Jul 28, 2020
We group related permits and State housing reports into projects. That grouping is our inference, not an official record.
Replace Mechanical Appliance
Install new 200 amp main panel. Install new exterior sub panel at garage Install new EV charger Remove sub panel in closet main house. — Service Upgrade, EV Charging Station
Conv. Studio To A.D.U. T.D. 8-13-20
Tear-Off & Re-Roof W/ Comp Shngls
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
0.69 acres
Assessor's classification for assessment purposes. This is not zoning.
209 SAN GERONIMO VALLEY DR
Source: County of Marin GIS (MarinMap), Parcels · Geography: parcel · Retrieved Nov 13, 2026
Search by parcel number 172-051-31. Assessed value is not market value.
Search by parcel number 172-051-31 (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.
| Camello Recent nearby: 5000 Sir Francis Drake Blvd (Apr 8, 2014) | New single-family home | 13 in ½ mi | $5,103,957 | 0 vs 0 prior |
| Owner Recent nearby: 49 Conifer Way A K A 47 (Aug 27, 2019) | New garage / accessory structure | 5 in ½ mi | $356,200 | 25 vs 15 prior+67% |
| Owner Builder Recent nearby: 170 Redwood Dr (Feb 12, 2024) | New garage / accessory structure | 3 in ½ mi | $123,500 | 226 vs 240 prior−6% |
| C Overaa And Recent nearby: 5000 Sir Francis Drake Blvd (Aug 5, 2025) | New garage / accessory structure | 1 in ½ mi | $870,000 | 0 vs 0 prior |
| Ralph D Bruinsslot Recent nearby: 2 Osprey Trl (Feb 18, 2014) | New single-family home | 1 in ½ mi | $318,000 | 0 vs 0 prior |
| Guthrie Construction Recent nearby: 9 Sylvan Way (Mar 21, 2024) | Remodel / interior alteration | 1 in ½ mi | $225,000 | 0 vs 3 prior |
| Norman Charles Construction Recent nearby: 17 Madrone Ave (Sep 8, 2021) | Remodel / interior alteration | 1 in ½ mi | $200,000 | 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) |
| EV chargerOn this parcel | 482 | 0d | 0d | 0d | 0d | 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.