3811 20th Ave
Sacramento 95820 · South Oak Park · City of Sacramento · Coordinates: 38.53471, -121.46534
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 $456,000 ($401,000–$511,000).
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 6,098 sq ft lot. Local precedent is active with 6 ADU permits within ¼ mile over the last 36 months.
Source: City of Sacramento zoning · CA Gov. Code 66314 & 65852.21
- ✓ 3 documented municipal building permits on file
On-parcel permit history is indexed through Jan 14, 2022, letting you verify roof, HVAC, electrical, or structural work against seller disclosures.
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)
- ! Delayed or open permit activity on this parcel
Plumbing / water heater / sewer (RES-2007700): Issued after 10 mo — slower than 90% of plumbing / water heater / sewer permits in City of Sacramento (median 0d, 90th pct 1d, n=18,112).
Source: City of Sacramento CDD, Issued Building Permits (Current Year) (review-time benchmark)
- ! 5 slow or stalled nearby projects within ½ mile
Closest lead: Accessory dwelling unit at 3320 20th Ave (0.31 mi W, issued). 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 (~$5,648/yr at $456,000)
Sale triggers reassessment to 1.00% base + ~0.14% voter debt (~$471/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:
- 6,098 sq ft (0.14 ac)
- Assessor use:
- Residential · Two Family · 2 Single Family Units
- Tax rate area:
- 03019
- Addresses on lot:
- 3811 20TH AVE; 3815 20TH 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 6,098 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: $401,000 – $511,000 · 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
- Plumbing / water heater / sewer (RES-2007700) (Expired Permit)On this parcel
Issued after 10 mo — slower than 90% of plumbing / water heater / sewer permits in City of Sacramento (median 0d, 90th pct 1d, n=18,112).
- Accessory dwelling unit at 3320 20th Ave (Issued)0.31 mi 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)0.41 mi NW
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.
- SB 9 Lot Split & Duplex at 3727 17th Ave (Entitled)0.16 mi N
In "Entitled" for 2.9 yr (since Jan 5, 2024), 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: Tdtd Construction (2 on parcel, 2 in ½ mi · Plumbing / water heater / sewer); D And S Construction (4 in ½ mi · New single-family home); Gw Demolition (4 in ½ mi · Demolition); Rpm Development And Engineering (3 in ½ mi · Accessory dwelling unit (new or conversion)); Bhandal Construction (3 in ½ mi · New single-family home).
Permit & Project History on This Parcel (3 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| RES-2200547 | Plumbing / water heater / sewer | Finaled | Iss. Jan 14, 2022 | $5,000 | Obtain Permit to complete work on expired permit RES-2007700. (New Tankless Water Heater is still valid. RES-2114151). … |
| RES-2114151 | Plumbing / water heater / sewer | Expired Permit | Iss. Jun 30, 2021 | $1,200 | Change-out installation of Electric - 040 gallon to Electric - Tankless, located outside building, screened by the Build… |
| RES-2007700 | Plumbing / water heater / sewer | Expired Permit | Iss. Mar 23, 2021 | $10,000 | EPC-HSG Case 20-012240 Remodel / Removal of Illegal 3rd Unit -- REMODEL : REMOVE ILLEGAL KITCHEN AND REAR BUILT OUT TH… |