Greenbrae 94904 · Kentfield · APN 070-133-16 · Unincorporated Marin
Zoned R1-B2 in Unincorporated Marin with likely ADU & SB 9 infill eligibility and zero mapped flood, fire, or fault hazard overlaps; benchmark value $2,321,000 ($2,042,000–$2,600,000).
Zoned R1-B2 supports ministerial ADU/JADU review plus SB 9 both two-unit development and ministerial urban lot split on a 9,017 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 (8 total permits, latest Dec 16, 2025).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (parcel APN)
104 substantial renovation & housing permits over 24 months (41.3 per 1,000 parcels vs. 16.4 citywide baseline) (#7 of 22 neighborhoods).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (Kentfield)
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: 4 permitted, 1 proposed or in review; 1 demolition.
6 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.
109 permits within ½ mile since November 2024
$2,321,000
Benchmark range: $2,042,000 – $2,600,000
about 43% of the lot of the parcel intersects Zone X: 0.2% annual chance flood hazard (shaded X). Outside mandatory federal SFHA insurance rules, but check local drainage and finished-floor requirements.
Source: FEMA National Flood Hazard Layer (parcel polygon)
New garage / accessory structure (69948): Pending in review for 12.8 yr (28.4× 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: 1000 Drakes Landing Road (0.22 mi S, 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 (~$2,262/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.
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 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 12.3 yr (since Jul 8, 2014), with no new permit record in 12.3 yr. · $11,500 declared valuation
In "Applied" for 12.3 yr (since Aug 12, 2014), with no new permit record in 12.3 yr. · 1 unit · $300,000 declared valuation
Permit issued and active for 11.7 yr (first record Feb 17, 2015), with no completion or new permit record in 11.4 yr. · 1 unit · $600,000 declared valuation
Permit issued and active for 8.8 yr (first record Jan 25, 2018), with no completion or new permit record in 8.6 yr. · $12,000 declared valuation
In "Entitled" for 8.2 yr (since Sep 12, 2018), with no new permit record in 8.2 yr. · 1 unit
Permit issued and active for 6.3 yr (first record Jul 30, 2020), with no completion or new permit record in 6 yr. · 1 unit · $12,725 declared valuation
Nearby electrical / panel (146 Almenar Dr): First appeared in published agency feed
Record B49069 · Detected between snapshots
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Snapshot diff within ½ mile
Nearby other (109 Bretano Way): First appeared in published agency feed
Record 182872 · Detected between snapshots
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Snapshot diff within ½ mile
Nearby roof replacement (19 Bretano Way): First appeared in published agency feed
Record B49030 · Detected between snapshots
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Snapshot diff within ½ mile
Nearby other (109 Bretano Way): No longer present in latest agency feed
Record 94481 · Detected between snapshots
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Snapshot diff within ½ mile
Nearby addition (adds square footage) (22 Via Cheparro): Declared valuation changed from (blank) to 185000
Record 94589 · Detected between snapshots
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Snapshot diff within ½ mile
Nearby addition (adds square footage) (22 Via Cheparro): Description text was updated
Record 94589 · 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 $2,157,052 in September 2025 to $2,308,409 in September 2026.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94904 (not a parcel appraisal)
15 La Cuesta Dr · $50,000 valuation
Records span Jun 10, 2026 to Aug 21, 2026 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
28 Corte Morada · 1 unit · $550,000 valuation
Records span Feb 25, 2026 to Jun 4, 2026 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Electrical / panel permit application filed (B45192)
Current status: Issued
Upgrade existing 125a main service panel to 200A solar ready main service panel — Service Upgrade · Declared valuation: $5,000 · Contractor: Ekr Electric
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Electrical / panel permit issued (B45192)
Recorded status: Issued
Upgrade existing 125a main service panel to 200A solar ready main service panel — Service Upgrade · Declared valuation: $5,000 · Contractor: Ekr Electric
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Roof replacement permit application filed (B44729)
Current status: Issued
Tear lower section of roof only and install new class A comp roof — ReRoofing · Declared valuation: $13,680 · Contractor: Booth & Little Inc
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Roof replacement permit issued (B44729)
Recorded status: Issued
Tear lower section of roof only and install new class A comp roof — ReRoofing · Declared valuation: $13,680 · Contractor: Booth & Little Inc
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Solar / battery storage permit application filed (B44708)
Current status: Issued
11.04 kW-DC Roof Mount Residential Solar PV Installation w/10 kWh ESS · Declared valuation: $64,056 · Contractor: K And S Energy Inc
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Solar / battery storage permit issued (B44708)
Recorded status: Issued
11.04 kW-DC Roof Mount Residential Solar PV Installation w/10 kWh ESS · Declared valuation: $64,056 · Contractor: K And S Energy 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 "Entitled" for 2.1 yr (since Oct 8, 2024), exceeding the 292d median and 313d 90th percentile for new multifamily / condos / mixed-use permits in Unincorporated Marin (n=21). High-impact scale (19 housing units, 4 deed-restricted affordable across 0 permits).
Pending in review for 12.8 yr (28.4× the 164d median) — slower than 90% of new garage / accessory structure permits in Unincorporated Marin (median 164d, 90th pct 485d, n=356).
Active in "Issued" for 19 mo (first record Apr 11, 2025) with no new permit activity recorded in 14 mo. High-impact scale (1 housing unit, $750,000 declared valuation across 1 permit).
In "Applied" for 5.7 yr (since Mar 2, 2021), exceeding the 55d median and 261d 90th percentile for demolition permits in Unincorporated Marin (n=130).
In "Applied" for 3 yr (since Nov 6, 2023), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
In "Entitled" for 5.1 yr (since Oct 6, 2021), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
Substantial improvements (additions, interior remodels, ADUs, commercial TI, and new builds) across 2,517 parcels
−34.9% YoY
City baseline: 16.4 / 1k
104 in trailing 24m
Includes 29 ADUs
| Builder / contractor | Primary specialty | Here / ½ mi | ½ mi valuation | Citywide 24m trend |
|---|---|---|---|---|
| Owner | Remodel / interior alteration | 2 on parcel13 in ½ mi | $1,029,180 | 25 vs 15 prior+67% |
| Tesla Energy | Solar / battery storage | 2 on parcel2 in ½ mi | $40,075 | 0 vs 0 prior |
| K And S Energy | Solar / battery storage | 1 on parcel1 in ½ mi | $64,056 |
| 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) |
| New garage / accessory structureOn this parcel | 356 | 104d | 164d | 294d | 485d | 159d(vs 205d prior) |
HUD Small Area Fair Market Rent · ZIP 94904
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 ($23,200/yr) + local voter-approved bond debt ($3,480/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.
−$139,466/yr
Cash needed: $510,400
NOI: $1,308/yr
P&I: $11,731/mo
For $0/mo net cash flow
At $3,275/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 | $3,013/mo | −$11,999/mo | -28.2% | $19,761/mo | −$12,066/mo |
| Base (your inputs) | Your entered assumptions, 3.0%/yr rent growth | $3,275/mo | −$11,622/mo | -27.3% | $18,291/mo | −$11,504/mo |
| Optimistic (cap-limited) | +6% starting rent, 3% vacancy, 4.5%/yr rent growth (capped by AB 1482 ceiling of 8.6%/yr) | $3,472/mo | −$11,406/mo | -26.8% | $17,866/mo | −$11,077/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.
Upgrade existing 125a main service panel to 200A solar ready main service panel — Service Upgrade
Tear lower section of roof only and install new class A comp roof — ReRoofing
11.04 kW-DC Roof Mount Residential Solar PV Installation w/10 kWh ESS
Upgrade main electrical panel — Service Upgrade
Energy Storage System
8.6kw Roof Mounted Photovoltaic & Energy Storage System
Addn, Rmdl, Add Stair In Gar***Ext To 3/6/17 Per Wpk T.D. 12/12/13
Addn, Rmdl, Add Stair In Gar T.D. 12/12/13
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
0.21 acres
Assessor's classification for assessment purposes. This is not zoning.
85 CORTE CAYUGA
Source: County of Marin GIS (MarinMap), Parcels · Geography: parcel · Retrieved Nov 13, 2026
Search by parcel number 070-133-16. Assessed value is not market value.
Search by parcel number 070-133-16 (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 0 prior |
| Booth And Little | Roof replacement | 1 on parcel1 in ½ mi | $13,680 | 0 vs 0 prior |
| Ekr Electric | Electrical / panel | 1 on parcel1 in ½ mi | $5,000 | 0 vs 0 prior |
| Owner Builder Recent nearby: 15 La Cuesta Dr (Aug 21, 2026) | Remodel / interior alteration | 17 in ½ mi | $991,825 | 226 vs 240 prior−6% |
| Goltermann Construction Recent nearby: 42 Corte Morada (Jun 28, 2018) | Demolition | 6 in ½ mi | $1,130,000 | 0 vs 0 prior |
| Lamperti Contracting And Design Recent nearby: 3 Los Cerros Dr (Sep 23, 2024) | Remodel / interior alteration | 3 in ½ mi | $567,072 | 2 vs 7 prior |
| G Family Construction Recent nearby: 19 Los Cerros Dr (Jan 26, 2022) | Addition (adds square footage) | 3 in ½ mi | $551,000 | 0 vs 0 prior |
| Tom Redmond Construction Recent nearby: 12 Bretano Way (Nov 30, 2017) | Addition (adds square footage) | 3 in ½ mi | $203,000 | 0 vs 0 prior |
| Accessory dwelling unit (new or conversion) | 298 | 120d | 204d | 331d | 549d | 214d(vs 181d 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) |
| 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.