El Sobrante 94803 · APN 425-252-018-6 · Unincorporated Contra Costa
Since November 2024 within ½ mile: 1 homes completed, 5 permitted, 9 proposed or in review.
15 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.
86 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 Nov 9, 2026
$725,000
Benchmark range: $616,000 – $834,000
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.
We don't have building permits for Unincorporated Contra Costa, so we can't show what has been permitted nearby.
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 Contra Costa's planning department before relying on it.
Sources: Contra Costa County Department of Conservation and Development, Zoning (unincorporated Contra Costa) (retrieved Nov 9, 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 R-7 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 "Entitled" for 20 mo (since Mar 17, 2025), with no new permit record in 20 mo. · 1 unit
In "Entitled" for 20 mo (since Mar 17, 2025), with no new permit record in 20 mo. · 1 unit
Permit issued and active for 8.6 yr (first record Apr 9, 2018), with no completion or new permit record in 8.5 yr. · 1 unit · $50,000 declared valuation
In "Entitled" for 8.3 yr (since Aug 6, 2018), with no new permit record in 8.3 yr. · 5 units
In "Entitled" for 7.4 yr (since Jun 24, 2019), with no new permit record in 7.4 yr. · 1 unit · $50,000 declared valuation
Permit issued and active for 7.1 yr (first record Sep 17, 2019), with no completion or new permit record in 7.1 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)
5250 Sunset Dr Unit 2 · 1 unit · $75,000 valuation
Records span Sep 19, 2024 to Oct 31, 2025 (2 permits).
Source: City of Richmond Planning & Building, PermitTrak (eTRAKiT permits, 1992 to April 2025) & HCD APR (grouped project within ½ mile)
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)
Source: City of Richmond Planning & Building, PermitTrak (eTRAKiT permits, 1992 to April 2025) & HCD APR (grouped project within ½ mile)
1 unit
Source: City of Richmond Planning & Building, PermitTrak (eTRAKiT permits, 1992 to April 2025) & HCD APR (grouped project within ½ mile)
1 unit
Source: City of Richmond Planning & Building, PermitTrak (eTRAKiT permits, 1992 to April 2025) & HCD APR (grouped project within ½ mile)
3409 May Rd Unit A · 1 unit · $200,000 valuation
Records span Aug 15, 2024 to Jun 16, 2025 (2 permits).
Source: City of Richmond Planning & Building, PermitTrak (eTRAKiT permits, 1992 to April 2025) & HCD APR (grouped project within ½ mile)
Source: City of Richmond Planning & Building, PermitTrak (eTRAKiT permits, 1992 to April 2025) & HCD APR (grouped project within ½ mile)
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 (CDSU25-00011)
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 (CDSU25-00029)
Reported in 2025 Housing Element Annual Progress Report
ADU · Renter
Source: California HCD, Housing Element Annual Progress Report — Table A2 · Geography: parcel
3085 Sun Ct Unit 2 · 1 unit · $48,000 valuation
Records span Dec 10, 2024 to Mar 3, 2025 (2 permits).
Source: City of Richmond Planning & Building, PermitTrak (eTRAKiT permits, 1992 to April 2025) & HCD APR (grouped project within ½ mile)
3085 Sun Ct · 1 unit · $48,000 valuation
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 Unincorporated Contra Costa development graph →Active in "Entitled" for 20 mo (first record Mar 17, 2025) with no new permit activity recorded in 20 mo.
Active in "Entitled" for 20 mo (first record Mar 17, 2025) with no new permit activity recorded in 20 mo.
Active in "Entitled" for 8.3 yr (first record Aug 6, 2018) with no new permit activity recorded in 8.3 yr. High-impact scale (5 housing units across 0 permits).
Active in "Entitled" for 7.4 yr (first record Jun 24, 2019) with no new permit activity recorded in 7.4 yr.
Active in "Entitled" for 3.3 yr (first record Aug 1, 2023) with no new permit activity recorded in 3.3 yr.
Active in "In review" for 23 mo (first record Dec 10, 2024) with no new permit activity recorded in 20 mo.
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 ($7,250/yr) + local voter-approved bond debt ($1,305/yr) + fixed direct levies/Mello-Roos ($450/yr).
Insurance & hazard context:
−$29,435/yr
Cash needed: $159,500
NOI: $14,557/yr
P&I: $3,666/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 | −$2,769/mo | -20.8% | $6,395/mo | −$2,734/mo |
| Base (your inputs) | Your entered assumptions, 3.0%/yr rent growth | $2,750/mo | −$2,453/mo | -18.5% | $5,919/mo | −$2,262/mo |
| Optimistic (cap-limited) | +6% starting rent, 3% vacancy, 4.5%/yr rent growth (capped by AB 1482 ceiling of 8.6%/yr) | $2,915/mo | −$2,272/mo | -17.1% | $5,782/mo | −$1,903/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.
No building permits are recorded for this parcel since 2016.
Source: City of Richmond Planning & Building, PermitTrak (eTRAKiT permits, 1992 to April 2025) · Geography: parcel (APN) · Retrieved Nov 9, 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 | —(CDSU25-00011) | ADU · Renter | 1 (Mar 17, 2025) | — | — | — |
| 2025 | —(CDSU25-00029) | ADU · Renter | 1 (Mar 17, 2025) | — | — | — |
Source: California HCD, Housing Element Annual Progress Report — Table A2 · Geography: project (parcel) · Retrieved Nov 9, 2026 · From Unincorporated Contra Costa'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 Nov 9, 2026
0.14 acres
Assessor's classification for assessment purposes. This is not zoning.
318 JOAN VISTA ST
Source: Contra Costa County Assessor / Department of Information Technology, Assessment Parcels · Geography: parcel · Retrieved Nov 9, 2026
County map with assessor parcel maps and zoning. Search parcel 425-252-018.
Search by parcel number 425-252-018 (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.