Hayward 94542 · APN 445-230-43 · Hayward
Zoned RL in Hayward with likely ADU & SB 9 infill eligibility and zero mapped flood, fire, or fault hazard overlaps; benchmark value $1,195,000 ($1,016,000–$1,374,000).
Zoned RL supports ministerial ADU/JADU review plus SB 9 both two-unit development and ministerial urban lot split on a 4,982 sq ft lot.
Source: Hayward zoning · CA Gov. Code 66314 & 65852.21
all of the lot of the parcel intersects Zone X: minimal flood hazard. Outside mandatory federal SFHA insurance rules, but check local drainage and finished-floor requirements.
Source: FEMA National Flood Hazard Layer (parcel polygon)
Closest lead: Bunker Hill (PG5) (0.21 mi NE, entitled). Inspect timeline history before assuming near-term completion.
Source: Alameda County building permits · HCD APR (½-mile radius)
Automated synthesis of indexed municipal, county, state, and federal public records — informational context only, not a formal appraisal, survey, or legal/tax determination.
$1,195,000
Benchmark range: $1,016,000 – $1,374,000
Permit counts and nearby activity on this page may omit municipal counter records. Request a parcel permit report directly from the local building department.
Source: Source coverage registry (Hayward)
Sale triggers reassessment to 1.00% base + ~0.22% voter debt (~$1,252/mo). Confirm exact Mello-Roos / CFD special assessments on the county tax bill.
Source: CA Const. Art. XIIIA (Prop 13) · County Tax Collector
Since — within ½ mile: 2 homes completed, 3 permitted.
5 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.
No permit activity recorded within ½ mile.
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 Hayward, 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 Hayward's planning department before relying on it.
Sources: City of Hayward GIS, Zoning (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 RL as single-family residential, from the code's name only
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 5 yr (first record Nov 9, 2021), with no completion or new permit record in 5 yr. · 1 unit
Permit issued and active for 5 yr (first record Nov 9, 2021), with no completion or new permit record in 5 yr. · 1 unit
Permit issued and active for 4.9 yr (first record Dec 6, 2021), with no completion or new permit record in 4.9 yr. · 1 unit
Permit issued and active for 4.6 yr (first record Apr 12, 2022), with no completion or new permit record in 4.6 yr. · 1 unit
In "Entitled" for 4.6 yr (since Apr 19, 2022), with no new permit record in 4.6 yr. · 90 units
Permit issued and active for 2.5 yr (first record May 28, 2024), with no completion or new permit record in 2.5 yr. · 1 unit
Latest published Zillow Home Value Index (ZHVI) update
Changed from $1,206,780 in September 2025 to $1,212,614 in September 2026.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94542 (not a parcel appraisal)
1 housing unit completed (202105924)
Reported in 2025 Housing Element Annual Progress Report
ADU · Renter
Source: California HCD, Housing Element Annual Progress Report — Table A2 · Geography: parcel
1 unit
Records span Dec 20, 2022 to Oct 20, 2025 (0 permits).
Source: Alameda County building permits & HCD APR (grouped project within ½ mile)
Annual ZIP 94542 home-value index checkpoint
Changed from $1,273,316 in September 2024 to $1,206,780 in September 2025.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94542 (not a parcel appraisal)
1 unit
Source: Alameda County building permits & HCD APR (grouped project within ½ mile)
1 unit
Source: Alameda County building permits & HCD APR (grouped project within ½ mile)
1 unit
Source: Alameda County building permits & HCD APR (grouped project within ½ mile)
Annual ZIP 94542 home-value index checkpoint
Changed from $1,197,411 in September 2023 to $1,273,316 in September 2024.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94542 (not a parcel appraisal)
1 unit
Source: Alameda County building permits & HCD APR (grouped project within ½ mile)
Source: Alameda County building permits & HCD APR (grouped project within ½ mile)
1 unit
Source: Alameda County building permits & HCD APR (grouped project within ½ mile)
1 unit
Source: Alameda County building permits & HCD APR (grouped project within ½ mile)
1 unit
Records span Oct 18, 2021 to Apr 19, 2024 (0 permits).
Source: Alameda County building permits & HCD APR (grouped project within ½ mile)
Source: Alameda County building permits & HCD APR (grouped project within ½ mile)
Annual ZIP 94542 home-value index checkpoint
Changed from $1,233,973 in September 2022 to $1,197,411 in September 2023.
Source: Zillow Home Value Index (ZHVI) · Data provided by Zillow · Geography: ZIP 94542 (not a parcel appraisal)
Cross-referenced intelligence from our historical development graph—connecting parcels, permits, entity-resolved builders, empirical review-time distributions, and neighborhood renovation trends.
Explore full Hayward development graph →Active in "Entitled" for 4.6 yr (first record Apr 19, 2022) with no new permit activity recorded in 4.6 yr. High-impact scale (90 housing units, 18 deed-restricted affordable across 0 permits).
Active in "Issued" for 5 yr (first record Nov 9, 2021) with no new permit activity recorded in 5 yr. High-impact scale (1 housing unit, 1 deed-restricted affordable across 0 permits).
Active in "Issued" for 2.5 yr (first record May 28, 2024) with no new permit activity recorded in 2.5 yr.
Active in "Issued" for 14 mo (first record Sep 15, 2025) with no new permit activity recorded in 14 mo.
Active in "Issued" for 2.4 yr (first record Jun 20, 2024) with no new permit activity recorded in 2.4 yr.
Active in "Issued" for 4.6 yr (first record Apr 12, 2022) with no new permit activity recorded in 4.6 yr.
HUD Small Area Fair Market Rent · ZIP 94542
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 ($11,950/yr) + local voter-approved bond debt ($2,629/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.
−$60,263/yr
Cash needed: $262,900
NOI: $12,248/yr
P&I: $6,043/mo
For $0/mo net cash flow
At $3,150/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 | $2,898/mo | −$5,384/mo | -24.6% | $10,413/mo | −$5,374/mo |
| Base (your inputs) | Your entered assumptions, 3.0%/yr rent growth | $3,150/mo | −$5,022/mo | -22.9% | $9,638/mo | −$4,833/mo |
| Optimistic (cap-limited) | +6% starting rent, 3% vacancy, 4.5%/yr rent growth (capped by local ordinance ceiling of 5.0%/yr) | $3,339/mo | −$4,814/mo | -22.0% | $9,414/mo | −$4,422/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 Hayward: Hayward Residential Rent Stabilization Ordinance — 5% annual cap for covered pre-1979 multifamily rental units. Official program rules ↗
Finaled / completed1 unitsApr 14, 2022 – Nov 21, 2025
We group related permits and State housing reports into projects. That grouping is our inference, not an official record.
No building permits are recorded for this parcel since 2016.
| Report year | Project / record | Type | Entitled | Permitted | Completed | Deed-restricted |
|---|---|---|---|---|---|---|
| 2025 | —(202105924) | ADU · Renter | — | — | 1 (Nov 21, 2025) | — |
| 2022 | 25907 Bryn Mawr Ave ADU(202105924) | ADU · Renter | — | 1 (Apr 14, 2022) | — | — |
Source: California HCD, Housing Element Annual Progress Report — Table A2 · Geography: project (parcel) · Retrieved Nov 9, 2026 · From Hayward's Housing Element Annual Progress Reports. A project can appear in several report years as it moves from entitlement to permit to completion.
Source: City of Hayward GIS, Zoning · Geography: zoning district polygon at parcel point · Retrieved Nov 9, 2026
0.11 acres
Assessor's classification for assessment purposes. This is not zoning.
25905 BRYN MAWR AVE
Source: Alameda County Assessor / Information Technology Department, Parcel Boundaries · Geography: parcel · Retrieved Nov 9, 2026
Look up assessed values and parcel maps by parcel number 445-230-43. Assessed value is not market value.
Search by parcel number 445-230-43 (Alameda County Treasurer-Tax Collector)
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.