3447 21st Ave
Sacramento 95820 · South Oak Park · City of Sacramento · Coordinates: 38.53383, -121.46967
Executive Verdict · Public-Records Synthesis
Zoned R-1 in City of Sacramento with likely ADU & SB 9 infill eligibility and zero mapped flood, fire, or fault hazard overlaps; benchmark value $382,000 ($336,000–$428,000).
Upsides & Opportunities
- ✓ ADU & SB 9 infill pathways screen as likely eligible
Zoned R-1 supports ministerial ADU/JADU review plus SB 9 both two-unit development and ministerial urban lot split on a 5,227 sq ft lot. Local precedent is active with 14 ADU permits within ¼ mile over the last 36 months.
Source: City of Sacramento zoning · CA Gov. Code 66314 & 65852.21
- ✓ Documented permitted upgrades (+$11,931 contributory est.)
Public building records show issued construction/renovation work on this parcel (7 total permits, latest Jul 28, 2025).
Source: City of Sacramento CDD, Issued Building Permits (Current Year) (parcel APN)
Watchouts & Due Diligence
- ! Mapped flood awareness zone (Zone X: minimal flood hazard)
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)
- ! 6 slow or stalled nearby projects within ½ mile
Closest lead: Franklin Blvd Mixed Use Bldg A and Site Work (0.44 mi NW, in review). Inspect timeline history before assuming near-term completion.
Source: City of Sacramento CDD, Issued Building Permits (Current Year) · HCD APR (½-mile radius)
- ! Year 1 Prop 13 tax reset (~$4,805/yr at $382,000)
Sale triggers reassessment to 1.00% base + ~0.14% voter debt (~$400/mo). Confirm exact Mello-Roos / CFD special assessments on the county tax bill.
Source: CA Const. Art. XIIIA (Prop 13) · County Tax Collector
Parcel & Assessor
- Lot size:
- 5,227 sq ft (0.12 ac)
- Assessor use:
- Residential · Single Family · Subdivision
- Tax rate area:
- 03019
- Addresses on lot:
- 3447 21ST AVE
Zoning & Land Use
R-1 — Single-Unit Dwelling Zone (R)
2040 General Plan: Neighborhood (FAR up to 1)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned R-1 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned R-1, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned R-1, a single-family residential zone. The lot is 5,227 sq ft by the assessor, room for two lots of at least 1,200 sq ft, each at least 40% of the original.
Mapped Hazard Zones on This Lot
- CAL FIRE Fire Hazard Severity Zone
- Not in a State-mapped fire hazard severity zone
- FEMA National Flood Hazard Layer
- Zone X: minimal flood hazard (all of the lot) · FIRM panel 06067C0190H, effective August 16, 2012
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $336,000 – $428,000 · Status: Off market
HUD Small Area FMR (ZIP 95820) · FY 2026
Studio $1,530 · 1BR $1,610 · 2BR $1,980 · 3BR $2,640 · 4BR $3,040
Developments Deserving Closer Investigation & Active Area Builders
- Franklin Blvd Mixed Use Bldg A and Site Work (In review)0.44 mi NW
In "In review" for 4.1 yr (since Sep 29, 2022), exceeding the 210d median and 627d 90th percentile for new multifamily / condos / mixed-use permits in City of Sacramento (n=199). High-impact scale (4 housing units, $590,212 declared valuation across 4 permits). current_status changed to "Plan Check Target" in snapshot Nov 1, 2026.
- Accessory dwelling unit at 3320 20th Ave (Issued)440 ft W
Active in "Issued" for 21 mo (first record Feb 18, 2025) with no new permit activity recorded in 14 mo. current_status changed to "Finaled" in snapshot Nov 1, 2026.
- New duplex at 3821 35th St (In review)0.44 mi N
In "In review" for 15 mo (since Aug 20, 2025), exceeding the 184d median and 416d 75th percentile for new duplex / half-plex permits in City of Sacramento (n=115). current_status changed to "Verify" in snapshot Nov 1, 2026.
- Accessory dwelling unit at 4205 32nd St (Fee estimate)0.24 mi NW
In "Fee estimate" for 7 mo (since Apr 1, 2026), exceeding the 45d median and 184d 90th percentile for new single-family home permits in City of Sacramento (n=3,657).
Entity-resolved builders & contractors in ½ mile: Norman Metcalf Electric (2 on parcel, 3 in ½ mi · Electrical / panel); Aztec Solar (2 on parcel, 2 in ½ mi · Plan revision / deferred submittal); Community Resource Project (1 on parcel, 2 in ½ mi · Plumbing / water heater / sewer); Brazil Roofing And Repair (1 on parcel, 1 in ½ mi · Roof replacement); Air Temp Solutions (1 on parcel, 1 in ½ mi · HVAC / heat pump).
Permit & Project History on This Parcel (7 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| RES-2515826 | Plan revision / deferred submittal | Complete | App. Jul 28, 2025 | — | REVISION TO RES-2514137 - PV-4 Remove back up load subpanel. Back up loads will land in the Tesla Gateway. |
| RES-2514137 | Solar / battery storage | Finaled | Iss. Jul 8, 2025 | $27,618 | 2.7kw Solar PV System, 13.5 kw PV Storage System Size and 0gal Solar WH System (water heater installed null). All supply… |
| RES-2513914 | Roof replacement | Finaled | Iss. Jul 2, 2025 | $13,066 | E-Permit: Tear Off - Yes, Resheet - No, 1 layer(s), 13 squares of 40yr Laminated Dimensional Composition. CRRC: 0668-015… |
| RES-2511155 | EV charger | Finaled | Iss. May 30, 2025 | $1,400 | Permit for new 40a circuit for future EV charger only. Separate permit for EV charger will be required when EV charger … |