LADU
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Report ready APN 8511027002

1146 E BIRCHCROFT ST ARCADIA CA 91006

Los Angeles area · ARCADIA CA, CA 91006-5521
Lot size
6,811
sq ft · 0.16 ac
Zoning
—
Residential
Existing home
855
sq ft · 2 BR / 1 BA
Year built
1948
12.6% lot coverage
Buildability verdict
Likely buildable
Your parcel clears the major regulatory checks. 1 of 13 overlays passed cleanly.
Based on 13 regulatory overlays and your zoning designation.
13 LA City Overlays

Every overlay your parcel intersects

We run the same checks the LA Planning department would. Flags don't mean stop — they mean an extra review step.
1 pass 12 n/a
01 Zoning (single-family base)
Zoning unknown
02 Hillside Ordinance Area
Outside City of LA overlay data
03 Coastal Zone
Outside City of LA overlay data
04 Very High Fire Hazard Severity Zone
Outside City of LA overlay data
05 Methane Hazard Site
Outside City of LA overlay data
06 Flood Hazard Zone
Outside City of LA overlay data
07 Historic Preservation Overlay (HPOZ)
Outside City of LA overlay data
08 Historic-Cultural Monument
Outside City of LA overlay data
09 Rent Stabilization Ordinance
Outside City of LA overlay data
10 Alquist-Priolo Fault Zone
Outside City of LA overlay data
11 Earthquake-Induced Liquefaction
Outside City of LA overlay data
12 Earthquake-Induced Landslide
Outside City of LA overlay data
13 Specific Plan Area
Outside City of LA overlay data
ADU Size & Setbacks

What you can put on this lot

The maximum ADU size, height, and setbacks allowed under Arcadia and California state ADU law.
Max detached ADU
1,200 sq ft
Up to 16' tall · per Arcadia + CA state ADU law
Interior JADU
500 sq ft
Carved from your existing home
Required setbacks
Side
4 ft
each side
Rear
4 ft
minimum
Front
Match home
existing setback
Max height
16 ft · 25 ft attached
Parking required
Yes
Arcadia has limited transit coverage; replacement parking generally required.
Permit fees
$7k–$14k
Source · Arcadia planning code
Jurisdiction Rules

What Arcadia requires

City-specific ADU conditions on top of California state law. The full rules page has every setback, size, and fee detail.
Local conditions
Special ADU rules in Arcadia
Full Arcadia ADU rules
  • Horse-keeping overlay zones (R-M zones) apply to parts of Arcadia; ADU placement must respect equestrian easements.
  • Larger lot sizes are common — confirm ADU size limits relative to primary dwelling sq ft.
  • Arcadia Unified and Temple City Unified school districts assess separate school impact fees.

Source: Arcadia planning code · Last updated 2026-05-27. ADU rules change frequently — verify with the local building department.

All-in Cost Estimate

Six ways to ADU this property

Cost includes design, permits, materials, labor, soft costs, and site work. Based on LADU's project history in similar lots — not a quote.
JADU — inside existing home
JADU — inside existing home
Studio / 1 BA · up to 500 sf
All-in cost estimate
$94k–$116k
construction $87k–$102k · fees $7k–$14k
11–15 mo total build 6–10 mo
Carved from existing footprint. Fastest path, lowest permit risk.
Refine in calculator
Garage Conversion
Garage Conversion
1 BR / 1 BA · up to 420 sf
All-in cost estimate
$85k–$105k
construction $78k–$91k · fees $7k–$14k
11–15 mo total build 6–10 mo
Existing structure — no new foundation. Streamlined permitting.
Refine in calculator
Best fit
Detached 1 BR
Detached 1 BR
1 BR / 1 BA · up to 750 sf
All-in cost estimate
$232k–$277k
construction $225k–$263k · fees $7k–$14k
11–15 mo total build 6–10 mo
New construction, factory-built shell. Best yield per dollar.
Refine in calculator
Detached 2 BR
Detached 2 BR
2 BR / 2 BA · up to 1100 sf
All-in cost estimate
$337k–$399k
construction $330k–$385k · fees $7k–$14k
11–15 mo total build 6–10 mo
Maxes allowable detached size. Highest resale lift.
Refine in calculator
Prefab 1 BR
Prefab 1 BR
1 BR / 1 BA · up to 600 sf
All-in cost estimate
$187k–$194k
unit $180k · fees $7k–$14k
9–11 mo total build 4–6 mo
Factory-built unit. Fastest install once the site is ready.
Refine in calculator
Prefab 2 BR
Prefab 2 BR
2 BR / 2 BA · up to 1200 sf
All-in cost estimate
$377k–$384k
unit $370k · fees $7k–$14k
9–11 mo total build 4–6 mo
Full-size factory-built unit. Speed of prefab at max size.
Refine in calculator
Property Value

What this property is worth today

An estimate derived from public assessor records. Use it as a starting point for financing, not as an appraisal.
Estimated market value
$600,000 – $780,000
Midpoint $690,000
$600,000 $780,000
From the LA County Assessor
Assessed land
$283,861
Assessed improvements
$121,832
Total assessed value
$405,693
Prop-13 base year
2011

Prop-13-corrected: the assessed value can rise at most 2%/yr, so a long-held home is assessed far below market. We re-grow the base-year value at LA County's actual home-price appreciation (1.71× here). Indicative only — not an appraisal. Source: LA County Assessor public records.

LADU Timeline

From today to move-in ready

LADU handles every step — design, permits, build, inspection. You make 5–7 decisions total.
From kickoff to keys
Traditional build vs. prefab
Prefab ≈ 3 mo faster
Traditional build Site-built, stick framing
11–15 mo
Construction 6–10 mo · approvals add ~5 mo
Prefab ADU Factory-built, installed on site
9–11 mo
Construction 4–6 mo · approvals add ~5 mo
Site visit Design Permit submittal City review Construction Final inspection
Nearby ADUs

ADUs near this address

LADU's own completed projects. LADU pins show the neighborhood only — never a client's street address.
This property LADU projects (8)

LADU project pins show the neighborhood only — client addresses are kept private. Permit pins are public records from LA County Building & Safety.

LADU projects near 1146 E BIRCHCROFT ST ARCADIA CA 91006

  • Legalization in Arcadia, 91006 — 0.6 miles away
  • Legalization in El Monte, 91731 — 1.9 miles away
  • Legalization in Rosemead, 91770 — 3.9 miles away
  • Legalization in Rosemead, 91770 — 5.4 miles away
  • Design / build in San Gabriel, 91775 — 6.3 miles away
  • Legalization in Pasadena, 91104 — 7.4 miles away
  • Legalization in Pasadena, 91104 — 8.1 miles away
  • Legalization in Pasadena, 91104 — 8.1 miles away
One team, one process, zero headache
Ready to talk to an ADU expert?
We'll come measure 1146 E BIRCHCROFT ST ARCADIA CA 91006, walk you through your options, and give you a firm bid.
Schedule a free site visit (213) 855-3334
Report generated June 20, 2026 · Sources: City of LA ZIMAS, LA County Assessor, CA HCD, LA City Building & Safety