Property Decision EngineReport PDE-0241
ADU Screening Report
4178 Whitfield Avenue, Sacramento, CA 95821
Sacramento County, CA — sample rulesetDetached ADURuleset 2026.06.0
Screening status
Requires Verification
A detached ADU merits deeper review on this parcel, subject to the conditions below.
82%
Confidence
01
Project requested
Detached 1-bedroom accessory dwelling unit, approximately 800 sq ft, placed in the rear yard for long-term rental.
Type
Detached ADU
Size
800 sq ft
Rear setback
6 ft
Height
16 ft
02
Parcel facts
APN
274-0142-019-0000
Jurisdiction
Unincorporated Sacramento County
Lot size
8,540 sq ft
Dimensions
62 ft × 138 ft
Zoning
RD-5 — Single-Family Residential, 5 units/acre
Lot coverage
31% used of 50% max
03
Rule summary
- PASSParcel is in unincorporated Sacramento CountySacramento County GIS — City Boundaries layer
- PASSADU allowed in residential zone§309-55
- PASSRear setback meets 4 ft minimum§65852.2(c)
- PASSADU size within permitted limits§309-55
- CONDITIONALVery High Fire Hazard Severity ZoneCAL FIRE Fire Hazard Severity Zone layer
- CONDITIONALSewer service & connection capacitySacramento County utility district layer
- UNKNOWNSeparate water meter requirementLocal water purveyor — not in sample dataset
04
Estimated cost & projected rent
Estimated build
$142,000–$196,000
Projected rent
$2,150/mo
Max ADU size
1,200 sq ft
Market reference ranges, not a contractor quote. Costs vary by site, design, and pricing.
05
Permit path
- 1Pre-application review (optional)1–2 weeks
- 2Building permit submittal (architectural + Title 24)Submit
- 3Plan check review6–10 weeks
- 4Permit issuance & fee payment1–2 weeks
- 5Construction & inspections12–20 weeks
- 6Certificate of Occupancy2–4 weeks
06
Risks & unknowns
Risks
- Fire hazard construction requirements. VHFHSZ designation likely adds 5–15% to hard construction cost and constrains materials.
- Sewer connection cost & capacity. Connection fee and capacity verification could materially affect budget; confirm with the sanitation district.
- ADU law changes annually. California ADU statute is amended frequently. Rules reflected here are current as of the verified date only.
Unknowns — shown, not hidden
- Whether a separate water meter is required for the ADU at this address.
- Exact sewer connection fee for this parcel from the sanitation district.
- Whether Local Responsibility Area fire requirements differ from the state designation shown.
07
Local restriction signals
Short-term rental review
Not checked yet — local restriction review required
Coastal review
Not checked yet — local restriction review required
Notes
- • Not checked yet — local restriction review required.
- • Short-term rental / Airbnb restrictions may vary by city and permit type.
- • Local permit or planning review may still be required even when ADU signals look positive.
Restriction sources
Not checked yet — local restriction review required.
08
Source citations
| Source | Section | Verified |
|---|---|---|
| California Government Code §65852.2 — Accessory Dwelling Units | §65852.2 | 2026-06-13 |
| Sacramento County ADU Ordinance — Zoning Code §309-55 | §309-55 | 2026-06-13 |
| CAL FIRE Fire Hazard Severity Zone Maps | — | 2026-06-13 |
| Sacramento County Assessor Parcel Layer (ArcGIS) | — | 2026-06-13 |
Methodology
Parcel facts were retrieved from official public sources. Each applicable rule was evaluated deterministically against the cited code to produce PASS, CONDITIONAL, or UNKNOWN. The screening result is derived from rule results — not from AI. A language model produced the plain-English explanations only, and a human reviewed this report before delivery. Ruleset 2026.06.0, verified 2026-06-13; methodology v1.0.
Disclaimer. This report is provided for informational purposes only and does not constitute legal, engineering, or planning advice. A screening result is not a permit approval. Zoning and ordinances change; the rules summarized here were current as of the dates noted. Local restriction items, including short-term rental or coastal review, may require direct city or agency confirmation. Verify all information with the applicable jurisdiction before taking action. Cost and timeline figures are market references, not quotes. City of Los Angeles is the first live beta jurisdiction. Sacramento County is used as a sample jurisdiction for this preview only. Coverage is expanding one jurisdiction at a time and is not yet complete.
Report PDE-0241 · Ruleset 2026.06.0 · Human-reviewed