El Sobrante 94803 · APN 435-080-036-5 · Richmond
Since November 2024 within ½ mile: 3 permitted, 1 proposed or in review.
4 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.
36 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: City of Richmond Planning & Building, PermitTrak (eTRAKiT permits, 1992 to April 2025) · Geography: permits located by parcel, ½ mile radius · Retrieved Oct 26, 2026
$884,000
Benchmark range: $751,000 – $1,017,000
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 Richmond's planning department before relying on it.
Sources: Contra Costa County Department of Conservation and Development, Zoning (unincorporated Contra Costa) (retrieved Oct 26, 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)
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 2.3 yr (first record Jul 15, 2024), with no completion or new permit record in 19 mo. · 1 unit · $53,400 declared valuation
Permit issued and active for 13.1 yr (first record Oct 2, 2013), with no completion or new permit record in 13.1 yr. · $5,000 declared valuation
In "Entitled" for 7.8 yr (since Jan 8, 2019), with no new permit record in 7.8 yr. · 1 unit
In "Entitled" for 6.3 yr (since Jul 15, 2020), with no new permit record in 6.3 yr. · 1 unit
In "Entitled" for 6.3 yr (since Jul 22, 2020), with no new permit record in 6.3 yr. · 1 unit
Permit issued and active for 6.1 yr (first record Sep 24, 2020), with no completion or new permit record in 6.1 yr. · 1 unit
Latest published Zillow Home Value Index (ZHVI) update
Changed from $727,674 in September 2025 to $726,110 in September 2026.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94803 (not a parcel appraisal)
1 unit
Source: City of Richmond Planning & Building, PermitTrak (eTRAKiT permits, 1992 to April 2025) & HCD APR (grouped project within ½ mile)
Annual ZIP 94803 home-value index checkpoint
Changed from $790,997 in September 2024 to $727,674 in September 2025.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94803 (not a parcel appraisal)
Building permit reported to State HCD for 1 housing unit (Existing full height 9'-0" basement to be converted in ADU)
Reported in 2025 Housing Element Annual Progress Report
ADU · Renter
Source: California HCD, Housing Element Annual Progress Report — Table A2 · Geography: parcel
1 unit
Source: City of Richmond Planning & Building, PermitTrak (eTRAKiT permits, 1992 to April 2025) & HCD APR (grouped project within ½ mile)
Accessory dwelling unit (new or conversion) permit issued (B24-02358)
Recorded status: Issued
Existing full height 9'-0" basement to be converted in ADU · Declared valuation: $53,400
Source: City of Richmond Planning & Building, PermitTrak (eTRAKiT permits, 1992 to April 2025) · Geography: parcel
1 unit
Source: City of Richmond Planning & Building, PermitTrak (eTRAKiT permits, 1992 to April 2025) & HCD APR (grouped project within ½ mile)
Accessory dwelling unit (new or conversion) permit application filed (BP24-00856)
Current status: Applied
EXISTING FULL HEIGHT 9'-0" BASEMENT TO BE CONVERTED IN ADU · Declared valuation: $53,400
Source: City of Richmond Planning & Building, PermitTrak (eTRAKiT permits, 1992 to April 2025) · Geography: parcel
1 unit
Source: City of Richmond Planning & Building, PermitTrak (eTRAKiT permits, 1992 to April 2025) & HCD APR (grouped project within ½ mile)
Annual ZIP 94803 home-value index checkpoint
Changed from $775,801 in September 2023 to $790,997 in September 2024.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94803 (not a parcel appraisal)
Accessory dwelling unit (new or conversion) permit application filed (B24-02358)
Current status: Issued
Existing full height 9'-0" basement to be converted in ADU · Declared valuation: $53,400
Source: City of Richmond Planning & Building, PermitTrak (eTRAKiT permits, 1992 to April 2025) · Geography: parcel
1 unit
Source: City of Richmond Planning & Building, PermitTrak (eTRAKiT permits, 1992 to April 2025) & HCD APR (grouped project within ½ mile)
Planning entitlement approved for 1 housing unit (KUMAR ADU)
Reported in 2025 Housing Element Annual Progress Report
ADU · Renter
Source: California HCD, Housing Element Annual Progress Report — Table A2 · Geography: parcel
Planning entitlement approved for 1 housing unit (KUMAR ADU)
Reported in 2024 Housing Element Annual Progress Report
ADU · Renter
Source: California HCD, Housing Element Annual Progress Report — Table A2 · Geography: parcel
Source: City of Richmond Planning & Building, PermitTrak (eTRAKiT permits, 1992 to April 2025) & 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 Richmond development graph →Active in "Issued" for 2.3 yr (first record Jul 15, 2024) with no new permit activity recorded in 19 mo.
Active in "Issued" for 13.1 yr (first record Oct 2, 2013) with no new permit activity recorded in 13.1 yr.
Active in "Entitled" for 6.3 yr (first record Jul 15, 2020) with no new permit activity recorded in 6.3 yr.
Active in "Entitled" for 7.8 yr (first record Jan 8, 2019) with no new permit activity recorded in 7.8 yr.
Active in "Entitled" for 3.9 yr (first record Nov 28, 2022) with no new permit activity recorded in 3.9 yr.
Active in "Issued" for 5.4 yr (first record Jun 9, 2021) with no new permit activity recorded in 5.4 yr.
HUD Small Area Fair Market Rent · ZIP 94803
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 ($8,850/yr) + local voter-approved bond debt ($1,593/yr) + fixed direct levies/Mello-Roos ($450/yr).
Mapped hazard zone insurance context on this parcel:
−$42,351/yr
Cash needed: $194,700
NOI: $11,349/yr
P&I: $4,475/mo
For $0/mo net cash flow
At $2,750/mo 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 | $2,530/mo | −$3,845/mo | -23.7% | $7,898/mo | −$3,834/mo |
| Base (your inputs) | Your entered assumptions, 3.0%/yr rent growth | $2,750/mo | −$3,529/mo | -21.8% | $7,310/mo | −$3,362/mo |
| Optimistic (cap-limited) | +6% starting rent, 3% vacancy, 3.0%/yr rent growth (capped by local ordinance ceiling of 3.0%/yr) | $2,915/mo | −$3,348/mo | -20.6% | $7,140/mo | −$3,158/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. In Richmond: Richmond Fair Rent, Just Cause for Eviction, and Homeowner Protection Ordinance — annual cap of 60% of CPI or 3.0% (whichever is lower) for covered pre-1995 units. Official program rules ↗
Issued1 unitsJul 15, 2024 – Mar 26, 2025
We group related permits and State housing reports into projects. That grouping is our inference, not an official record.
Existing full height 9'-0" basement to be converted in ADU
EXISTING FULL HEIGHT 9'-0" BASEMENT TO BE CONVERTED IN ADU
BASEMENT CONVERSION
REVISION TO PERMIT B17-03723 MOVING
REVISION TO B17-03723 ADDED AC DISCONNECT ON ELECTRICAL
INSTALL ROOF MOUNTED PV ARRAY ENERGY STORAGE SYSTEM
INSTALL ROOF MOUNTED PV ARRAY ENERGY STORAGE SYSTEM
REPLACE EXISTING A/C COMPRESS OR D-COIL
PARK DEDICATION FEE
ERECT NEW 2STY 5BEDRM 4BATH SFD W/ATT.GARAGE
Source: City of Richmond Planning & Building, PermitTrak (eTRAKiT permits, 1992 to April 2025) · Geography: parcel (APN) · Retrieved Oct 26, 2026 · Richmond's permits come from its eTRAKiT system, retired in 2025. Statuses are as of April 2025, and later permits are not published.
| Report year | Project / record | Type | Entitled | Permitted | Completed | Deed-restricted |
|---|---|---|---|---|---|---|
| 2025 | Existing full height 9'-0" basement to be converted in ADU(B24-02358) | ADU · Renter | — | 1 (Mar 26, 2025) | — | — |
| 2025 | KUMAR ADU(PLN24-225) | ADU · Renter | 1 (Jul 15, 2024) | — | — | — |
| 2024 | KUMAR ADU(PLN24-225) | ADU · Renter | 1 (Jul 15, 2024) | — | — | — |
Source: California HCD, Housing Element Annual Progress Report — Table A2 · Geography: project (parcel) · Retrieved Oct 26, 2026 · From Richmond's Housing Element Annual Progress Reports. A project can appear in several report years as it moves from entitlement to permit to completion.
Source: Contra Costa County Department of Conservation and Development, Zoning (unincorporated Contra Costa) · Geography: zoning district polygon at parcel point · Retrieved Oct 26, 2026
0.25 acres
Assessor's classification for assessment purposes. This is not zoning.
28 MARTINS LN
Source: Contra Costa County Assessor / Department of Information Technology, Assessment Parcels · Geography: parcel · Retrieved Oct 26, 2026
County map with assessor parcel maps and zoning. Search parcel 435-080-036.
Search by parcel number 435-080-036 (Contra Costa County Treasurer-Tax Collector). Assessed value is not market value.
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.