31 A N Ridgewood Rd

Kentfield 94904 · Kentfield · APN 074-211-15 · Unincorporated Marin

Property brief (PDF)Timeline ↓Calculator ↓Official records ↓

What's changing nearby

Since October 2024 within ½ mile: 13 permitted; 1 demolition.

14 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.

269 permits within ½ mile since October 2024

New construction12 · 4 units
Adds housing (ADU)8 · 8 units
Demolition6
Additions & renovations36
Building systems158
Repairs18
Other31

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.

Explore projects on the map →

Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: permits located by parcel, ½ mile radius · Retrieved Oct 28, 2026

What could be built here

A screen, not a determination

ADU or junior ADU

Likely eligible

Zoned RSP-1 (single-family residential): state law allows ADUs where homes are allowed.

What we couldn't check (4)

Setbacks, height and size limits in the local ADU ordinance
Utility and sewer capacity, fire access
Historic district or landmark status: we have no historic layer for this area yet.
Locally adopted fire hazard maps, which can be broader than the State's.

SB 9: two homes on the lot

Likely eligible

Zoned RSP-1, a single-family residential zone.

What we couldn't check (6)

Whether a tenant lived there in the last 3 years, or the building was withdrawn from rent under the Ellis Act
Rent-controlled or deed-restricted affordable housing on the lot
Wetlands, habitat, farmland, hazardous waste sites and conservation easements
Local SB 9 standards (size, setbacks, parking)
Historic district or landmark status: we have no historic layer for this area yet.
Locally adopted fire hazard maps, which can be broader than the State's.

SB 9: split into two lots

Likely eligible

Zoned RSP-1, a single-family residential zone.
The lot is 36,721 sq ft by the assessor, room for two lots of at least 1,200 sq ft, each at least 40% of the original.

What we couldn't check (6)

Owner-occupancy: the applicant must sign an affidavit to live in one of the homes for 3 years
Whether the lot was created by an earlier SB 9 split, or the owner split an adjacent lot
Whether a tenant lived there in the last 3 years, or the building was withdrawn from rent under the Ellis Act
Wetlands, habitat, farmland, hazardous waste sites and conservation easements
Historic district or landmark status: we have no historic layer for this area yet.
Locally adopted fire hazard maps, which can be broader than the State's.

Mapped hazards on this lot

Fire hazard severity zone: Moderate Fire Hazard Severity Zone (State Responsibility Area), all of the lot · effective Apr 1, 2024
FEMA flood zone: Zone X: minimal flood hazardFIRM panel 06041C0458F, effective March 16, 2016. Official flood map
Earthquake fault zone: Not in an Alquist-Priolo Earthquake Fault Zone

Built nearby: within ¼ mile since October 2023

New single-family home2
Accessory dwelling unit (new or conversion)6

See them on the map →

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 Oct 28, 2026) · CAL FIRE Office of the State Fire Marshal, Fire Hazard Severity Zones in the State Responsibility Area (effective 2024-04-01) (retrieved Oct 26, 2026) · CAL FIRE Office of the State Fire Marshal, Fire Hazard Severity Zones in the Local Responsibility Area (map dated 2025-03-24) (retrieved Oct 26, 2026) · FEMA, National Flood Hazard Layer — flood hazard zones (retrieved Oct 26, 2026) · FEMA, National Flood Hazard Layer — FIRM panels (retrieved Oct 26, 2026) · California Geological Survey, Alquist-Priolo Earthquake Fault Zones (retrieved Oct 26, 2026) · Zoning classes: our classification of RSP-1 as single-family residential, checked against the zone description on Oct 24, 2026

Property & area intelligence timeline

72 events · 27 slow/stalled projects

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.

Slow-moving or stalled projects (27)

Active projects spending 12+ months pre-issuance, 24+ months under construction, or 6+ months without new records

StalledDemolition at 21 Turnagain RdIssued
0.23 mi S
Permit issued and active for 12.8 yr (first record Jan 6, 2014), with no completion or new permit record in 12.7 yr. · $5,000 declared valuation
StalledDemolition at 101 Goodhill RdIssued
0.45 mi E
Permit issued and active for 12.4 yr (first record Jun 9, 2014), with no completion or new permit record in 12.4 yr. · $5,000 declared valuation
StalledDemolition at 155 Kent Ave Aka 159 Kent AveIssued
0.48 mi NE
Permit issued and active for 12.4 yr (first record Jun 18, 2014), with no completion or new permit record in 12.3 yr. · $15,000 declared valuation
StalledDemolition at 440 Goodhill RdIssued
0.27 mi NW
Permit issued and active for 12 yr (first record Oct 29, 2014), with no completion or new permit record in 11.9 yr. · $5,000 declared valuation
StalledNew home at 9 N Ridgewood RdIssued
0.1 mi SE
Permit issued and active for 11.5 yr (first record May 14, 2015), with no completion or new permit record in 11.3 yr. · 1 unit · $1,200,000 declared valuation
StalledNew homeApplied
470 ft NE
In "Applied" for 11.1 yr (since Oct 1, 2015), with no new permit record in 11.1 yr. · 1 unit

202610 events

Oct 26, 2026 – Oct 27, 2026Snapshot windowNearby snapshot change
0.35 mi W
Nearby other (505 Woodland Rd): First appeared in published agency feed
Record B48889 · Detected between snapshots
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Snapshot diff within ½ mile
Oct 15, 2026Nearby project · Issued
0.28 mi E
New home at 8 Laurel Way — Issued
8 Laurel Way · 1 unit · $22,000,000 valuation
Records span Mar 17, 2026 to Oct 15, 2026 (2 permits).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
September 2026Market trend
ZIP 94904
ZIP 94904 typical home value: $2,308,409 (+7.0% year-over-year)
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)
Sep 17, 2026Nearby project · Applied
0.33 mi E
Demolition at 122 Woodland Rd — Applied
122 Woodland Rd · $75,000 valuation
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Jul 22, 2026Nearby project · Issued
0.2 mi W
Accessory dwelling unit at 440 Woodland Rd — Issued
440 Woodland Rd · 1 unit · $450,000 valuation
Records span Aug 21, 2025 to Jul 22, 2026 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Jul 20, 2026Nearby project · Issued
0.38 mi E
Accessory dwelling unit at 121 Woodland Rd A D U — Issued
121 Woodland Rd A D U · 1 unit · $135,000 valuation
Records span Feb 5, 2026 to Jul 20, 2026 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Jul 15, 2026Nearby project · Issued
0.41 mi E
New home at 1 Orchard Way — Issued
1 Orchard Way · 1 unit · $10,047,573 valuation
Records span Dec 19, 2025 to Jul 15, 2026 (2 permits).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Jun 4, 2026Nearby project · Issued
0.49 mi W
Accessory dwelling unit at 109 Crown Rd A D U 109 A — Issued
109 Crown Rd A D U 109 A · 1 unit · $500,000 valuation
Records span Feb 27, 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)
Apr 21, 2026Nearby project · Issued
0.1 mi NW
Accessory dwelling unit at 34 Acorn Way A D U 34 A — Issued
34 Acorn Way A D U 34 A · 1 unit · $125,000 valuation
Records span Sep 12, 2025 to Apr 21, 2026 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
Mar 25, 2026Nearby project · Issued
0.18 mi N
Accessory dwelling unit at 40 Rock Rd (adu 40a) — Issued
40 Rock Rd (Adu 40a) · 1 unit · $40,420 valuation
Records span Jul 3, 2025 to Mar 25, 2026 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)

20255 events

Dec 12, 2025Permit issued
On this parcel
Solar / battery storage permit issued (B45116)
Recorded status: Issued
INSTALLATION OF ROOFTOP PV SOLAR IN ADDITION TO EXISTING PV SYSTEM · Declared valuation: $23,161 · Contractor: Symmetric Energy Inc
Turnaround:Issued 2d after application
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Dec 10, 2025Permit applied
On this parcel
Solar / battery storage permit application filed (B45116)
Current status: Issued
INSTALLATION OF ROOFTOP PV SOLAR IN ADDITION TO EXISTING PV SYSTEM · Declared valuation: $23,161 · Contractor: Symmetric Energy Inc
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel
Oct 6, 2025Nearby project · Issued
0.1 mi NW
New home at 34 Acorn Way — Issued
34 Acorn Way · 1 unit · $5,000 valuation
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)
September 2025Market trend
ZIP 94904
ZIP 94904 typical home value: $2,157,052 (−4.4% year-over-year)
Annual ZIP 94904 home-value index checkpoint
Changed from $2,256,428 in September 2024 to $2,157,052 in September 2025.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94904 (not a parcel appraisal)
Jul 29, 2025Nearby project · Issued
0.23 mi W
Accessory dwelling unit at 444 Woodland Rd (adu 444a) — Issued
444 Woodland Rd (Adu 444a) · 1 unit · $700,000 valuation
Records span Dec 27, 2024 to Jul 29, 2025 (1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) & HCD APR (grouped project within ½ mile)

Showing 15 of 72 timeline events

Recorded sales & deed transfers: California county recorders do not publish open bulk deed-transfer feeds without owner-PII restrictions, so individual sale deeds are not redistributed here. For official assessment roll and recorded transfer history in Unincorporated Marin, inspect Assessor's property search ↗.

Development graph & closer investigation

6 investigation leads

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 →

Developments deserving closer investigation (6)

On this parcel & within ½ mile

Accessory dwelling unit at 31 N Ridgewood Rd (adu 31a)IssuedNo new record in 16 mo$750,000
On this parcel
Active in "Issued" for 20 mo (first record Feb 28, 2025) with no new permit activity recorded in 16 mo. High-impact scale (1 housing unit, $750,000 declared valuation across 1 permit).
New home at 36 N Ridgewood RdIssuedNo new record in 9.9 yr$2,500,000
280 ft E
Active in "Issued" for 10.4 yr (first record May 19, 2016) with no new permit activity recorded in 9.9 yr. High-impact scale (1 housing unit, $2,500,000 declared valuation across 3 permits).
New home at 37 N Ridgewood RdIssuedNo new record in 11 yr$1,475,000
410 ft N
Active in "Issued" for 11.3 yr (first record Jul 16, 2015) with no new permit activity recorded in 11 yr. High-impact scale (1 housing unit, $1,475,000 declared valuation across 1 permit).
New home at 9 N Ridgewood RdIssuedNo new record in 11.3 yr$1,200,000
0.1 mi SE
Active in "Issued" for 11.5 yr (first record May 14, 2015) with no new permit activity recorded in 11.3 yr. High-impact scale (1 housing unit, $1,200,000 declared valuation across 1 permit).
New home at 6 Turnagain RdIssuedNo new record in 9.1 yr$1,196,000
0.16 mi S
Active in "Issued" for 9.2 yr (first record Aug 3, 2017) with no new permit activity recorded in 9.1 yr. High-impact scale (1 housing unit, $1,196,000 declared valuation across 1 permit).
Accessory dwelling unit at 432 Woodland RdAppliedNo new record in 2.5 yr$1,250,000
0.17 mi W
Active in "Applied" for 2.5 yr (first record Apr 12, 2024) with no new permit activity recorded in 2.5 yr. High-impact scale (1 housing unit, $1,250,000 declared valuation across 1 permit).

Neighborhood renovation & housing momentum: Kentfield

Substantial improvements (additions, interior remodels, ADUs, commercial TI, and new builds) across 2,520 parcels

Rank #7 of 22 neighborhoods in acceleration

Last 12m vs prior 12m: 42 vs 62 permits
24m rate per 1,000 parcels: 41.3
5-year substantial permits: 334
Housing additions (24m): 37 units

Ownership & rental scenario calculator

Prop 13 tax estimate & area benchmarks

Area rent & home-value benchmarks (kept separate from your assumptions)

Click any benchmark to pre-fill the calculator

HUD Small Area Fair Market Rent · ZIP 94904

HUD FY 2026 · 40th-percentile gross rent

Census ACS 5-year median gross rent (all bedroom counts combined):

Kentfield$2,832±$294

ZIP 94904$2,712±$122

Area home-value benchmarks (not an appraisal)

ZIP & neighborhood medians

Zillow ZHVI · ZIP 94904(as of September 2026)Data provided by Zillow · typical mid-tier home value in ZIP

$2,308,409

ACS Median Home Value · KentfieldCensus ACS 2020–2024 owner-occupied self-reported median

$2,000,000+

ACS Median Home Value · ZIP 94904Census ACS 2020–2024 owner-occupied self-reported median

$2,000,000+

1. Purchase, financing & Prop 13 tax reassessment

Purchase price ($)Down payment (%)$462,000Interest rate (%)Loan termClosing costs (%)$46,200

Prop 13 post-purchase property tax estimate

$2,251/mo ($27,015/yr · 1.17%)

Under 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 ($23,100/yr) + local voter-approved bond debt ($3,465/yr) + fixed direct levies/Mello-Roos ($450/yr).

Voter bond rate (%)$3,465/yrDirect levies / Mello-Roos ($/yr)Check Assessor's property search ↗

2. Your rent & operating assumptions

Monthly gross rent ($)Your assumptionVacancy allowance (%)−$164/moManagement (%)$249/moMaintenance (%)$164/moCapEx reserve (%)$164/moInsurance ($/mo)$3,300/yrHOA dues ($/mo)Owner utilities ($/mo)

Mapped hazard zone insurance context on this parcel:

Parcel intersects a mapped Moderate Fire Hazard Severity Zone (State Responsibility Area) (State responsibility area). Properties in High or Very High fire hazard zones may require California FAIR Plan + difference-in-conditions (DIC) coverage; verify actual insurability and quotes early.

3. Scenario results (based on your assumptions)

Net monthly cash flow: −$11,672
Cash-on-cash return: -27.6%
Cap rate (Year 1 NOI): 0.00%
DSCR (NOI / debt): 0.00x
Break-even gross rent: $18,355/mo
Break-even vacancy: 0% (negative at full occ.)

Monthly cash-flow breakdown (Effective gross $3,111 − Operating $3,103 − Debt $11,681)

Gross scheduled rent$3,275

Vacancy allowance (5%)−$164

Effective gross income$3,111

Prop 13 property tax (1.17%)−$2,251

Property insurance−$275

Management (8%), maintenance (5%) & CapEx (5%)−$576

Net Operating Income (NOI)+$9

Mortgage principal & interest (1,848,000 loan)−$11,681

Net monthly cash flow−$11,672

4. Sensitivity & rent-stabilization ceiling (Unincorporated Marin)

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	−$12,048/mo	-28.4%	$19,831/mo	−$12,127/mo
Base (your inputs)	Your entered assumptions, 3.0%/yr rent growth	$3,275/mo	−$11,672/mo	-27.6%	$18,355/mo	−$11,565/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	−$11,456/mo	-27.0%	$17,929/mo	−$11,137/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.

Common statutory exemption signals under AB 1482

Housing issued a certificate of occupancy within the last 15 years (rolling exemption under AB 1482).
Separately alienable single-family homes or condominiums not owned by a corporation, REIT, or LLC with a corporate member (when required statutory notice is in the lease).
Owner-occupied duplexes where the owner occupied one unit from the start of the tenancy.

Development projects on this parcel

Accessory dwelling unit at 31 N Ridgewood Rd (adu 31a)
Issued1 unitsFeb 28, 2025 – Jul 3, 2025

We group related permits and State housing reports into projects. That grouping is our inference, not an official record.

Permit history on this parcel

9 records

Solar / battery storageB45116
INSTALLATION OF ROOFTOP PV SOLAR IN ADDITION TO EXISTING PV SYSTEM
INSTALLATION OF ROOFTOP PV SOLAR IN ADDITION TO EXISTING PV SYSTEM
Applied
Dec 10, 2025
Issued
Dec 12, 2025
Recorded status
Issued as of Dec 12, 2025
Declared valuation
$23,161
Accessory dwelling unit (new or conversion)179550
Rebuild (E) Garage W (N) Attached A D U Above; Decks
Rebuild (E) Garage W (N) Attached A D U Above; Decks
Applied
Feb 28, 2025
Issued
Jul 3, 2025
Recorded status
Issued as of Jul 2, 2025
Declared valuation
$750,000
Solar / battery storage167468
Rooftop Photovoltaic 10.40 Kw
Rooftop Photovoltaic 10.40 Kw
Applied
Mar 11, 2021
Issued
Mar 22, 2021
Recorded status
Issued as of Mar 21, 2021
Declared valuation
$23,500
Electrical / panelB25177
Complete replacement of electric service with new 200Amp service. New panel to be installed in existing location. Existing underground PG&E feed to remain or as per PG&E. — Service Upgrade
Complete replacement of electric service with new 200Amp service. New panel to be installed in existing location. Existing underground PG&E feed to remain or as per PG&E. — Service Upgrade
Applied
Mar 16, 2021
Issued
Mar 16, 2021
Recorded status
Issued as of Mar 16, 2021
Declared valuation
$2,000
General repair166689
Ret Wall Near Pool
Ret Wall Near Pool
Applied
Sep 9, 2020
Issued
Dec 28, 2020
Recorded status
Issued as of Dec 27, 2020
Declared valuation
$10,000
Addition (adds square footage)165997
Addtn, Remod, Deck Related To T#85503 T.D. 6/30/20
Addtn, Remod, Deck Related To T#85503 T.D. 6/30/20
Applied
May 21, 2020
Issued
Oct 15, 2020
Recorded status
Issued as of Oct 14, 2020
Declared valuation
$550,000
General repair166688
Ret Wall Near Pool Equipment Shed
Ret Wall Near Pool Equipment Shed
Applied
Sep 9, 2020
Issued
Not issued
Recorded status
Applied as of Sep 8, 2020
Declared valuation
$12,000
Pool / spa166687
Pool
Pool
Applied
Sep 9, 2020
Issued
Not issued
Recorded status
Applied as of Sep 8, 2020
Declared valuation
$120,100
Remodel / interior alteration165105
Substantial Whle House Remdl T.D. 4/27/20
Substantial Whle House Remdl T.D. 4/27/20
Applied
Mar 19, 2020
Issued
Jul 14, 2020
Recorded status
Issued as of Jul 13, 2020
Declared valuation
$275,000

Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · Geography: parcel (APN) · Retrieved Oct 28, 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.

Housing activity reported to the State

Report year	Project / record	Type	Entitled	Permitted	Completed	Deed-restricted
2025	—(179550)	ADU · Renter	—	1 (Jul 3, 2025)	—	—

Source: California HCD, Housing Element Annual Progress Report — Table A2 · Geography: project (parcel) · Retrieved Oct 26, 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.

Zoning & planning

Zoning: RSP-1: Residential Single Family Planned (Unincorporated Marin)

Source: County of Marin GIS (MarinMap), Zoning (11 cities and unincorporated Marin) · Geography: zoning district polygon at parcel point · Retrieved Oct 28, 2026

Parcel facts

Lot size: 36,721 sq ft
Assessor land use: Single-Resid. - Improved
Addresses on parcel: 2

Source: County of Marin GIS (MarinMap), Parcels · Geography: parcel · Retrieved Oct 28, 2026

Official records

Assessor's property search
Search by parcel number 074-211-15. Assessed value is not market value.
Property tax bill
Search by parcel number 074-211-15 (Marin County Tax Collector)
County permit lookup
Permits issued in unincorporated Marin in the past 48 months. Each city keeps its own records.
FEMA Flood Map Service Center
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.

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

−$12,048/mo

-28.4%

$19,831/mo

−$12,127/mo

Base (your inputs)

Your entered assumptions, 3.0%/yr rent growth

$3,275/mo

−$11,672/mo

-27.6%

$18,355/mo

−$11,565/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

−$11,456/mo

-27.0%

$17,929/mo

−$11,137/mo

Report year

Project / record

Type

Entitled

Permitted

Completed

Deed-restricted

2025

—(179550)

ADU · Renter

—

1 (Jul 3, 2025)

—