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Arcadia — Development Standards

Development Standards under the Arcadia local zoning and planning code, with the controlling citations.

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Last reviewed: July 3, 2026

Overview

This page summarizes the Arcadia Development Code (Article IX, Division and Use of Land) requirements that control how sites are laid out and buildings are sized in the city — setbacks, heights, lot coverage, FAR/density, and related development controls. It sticks to the zoning/development standards (not Title 24/building-code details) and cites the controlling Arcadia code sections so applicants and reviewers can verify the rule text. For context on how the Code fits into permitting, see the Arcadia zoning & planning overview and the Arcadia Zoning pages.

Note: this synthesis is based on the Arcadia Development Code excerpts provided (Division 2 and related development standards). Always verify parcel‑specific details with the City.

District-by-district development standards

Below are the most decision-relevant standards organized by the Code’s district labels. Each district subsection states the purpose, typical permitted uses, and the key dimensional standards the Code lists (setbacks, height, FAR/coverage, and density where applicable). Citations show the Code section that controls the standard; see the Source References at the end for the specific ordinance excerpts used.

NOTE ON LINKS: the first time these operational topics are mentioned they are linked to Arcadia pages that explain the practice: parking, design review, overlays, ADUs, and the California building code / Title 24.

R-M (Residential-Mobile? / multifamily context in Arcadia)

  • Purpose: general multifamily and medium-density residential development; intended to provide a range of housing types consistent with the General Plan.
  • Typical permitted uses: multifamily dwellings, accessory structures, ADU/JADU where allowed per ADU rules. See Subsection for ADU rules.
  • Key standards (summary):
    • Minimum lot area: shown in Table 2-6 (multifamily) — 7,500 sq ft for R‑2; R‑M values follow Division 2 rules as applicable. See § 9102.01.090 for table reference.
    • Front setback: 25 ft (multifamily table reference; see § 9102.01.090).
    • Side (interior): 10 ft.
    • Rear: 10 ft.
    • Maximum height: typically 30 ft (see table and any exceptions in § 9102.01.100).
    • Other: density and open-space minimums are set in Table 2-6; additional multifamily standards are in § 9102.01.100.

(Verify exact numeric values for a particular property against the Table 2-6 rows in § 9102.01.090/100 for R‑2/R‑3/R‑3‑R.)

R-0 (Single-family/residential category)

  • Purpose: lower-density single-family residential development; preserve neighborhood character.
  • Typical uses: single‑family dwellings, accessory structures (subject to Table 2‑5), ADUs consistent with § 9102.01.080.
  • Key standards (summary from the single‑family tables):
    • Front setback: typically varies by subzone (see Table for R‑0 values; front setbacks commonly 6–20 ft depending on lot width and type). See § 9102.01.040.
    • Side setback: 10 ft typical; second‑story side setbacks use percent-of-lot-width rules (see § 9102.01.040).
    • Rear: commonly 10–25 ft depending on sub‑type and one/two‑story status; check the table.
    • Max lot coverage: 1‑story: 45%, 2‑story: 35% (table values for single‑family zones).
    • Max stories: typically 1–2 stories depending on subzone (see Table and § 9102.01.030/§ 9102.01.040).

R-1 (Single-family)

  • Purpose/uses: standard single-family residential; similar controls to R‑0 with slightly different setback/envelope rules (see Table 2‑x and § 9102.01.030/040).
  • Key standards:
    • Front setback: see Table values (commonly 6–25 ft depending on exact subzone and lot width) — § 9102.01.040.
    • Side and rear and max coverage: as per R‑0 table (one‑story 45%, two‑story 35%) — § 9102.01.040.

R-2 (Low-rise multifamily)

  • Purpose: smaller multifamily buildings; intended to increase housing capacity while protecting neighborhood form.
  • Typical uses: duplexes, small multifamily buildings, accessory uses; ADU rules apply per § 9102.01.080.
  • Key standards (from Table 2‑6 / § 9102.01.090):
    • Minimum lot area: 7,500 sq ft.
    • Front setback: 25 ft.
    • Side interior: 10 ft; rear: 10 ft.
    • Maximum height: 30 ft (with exceptions described in § 9102.01.100.H).
    • Maximum density: 1 unit per 3,750 sq ft (table row).

R-3 / R-3‑R (Higher-density multifamily / multifamily-residential)

  • Purpose: higher density residential development and larger multifamily projects.
  • Key standards:
    • Minimum lot area / width / depth: Table 2‑6 supplies specific minimums (e.g., 10,000 sq ft for R‑3). See § 9102.01.090.
    • Maximum density: R‑3: 1 unit per 1,089 sq ft (~40 units/acre); R‑3‑R: 1 per 1,450 sq ft.
    • Setbacks: front 25 ft, side 10 ft, rear 10 ft (standard table values) — § 9102.01.090.
    • Height: commonly 30 ft (with some R‑3‑R exceptions at 18 ft in the table). See § 9102.01.090/100.

C‑O, C‑G, C‑R, C‑M (Commercial zones)

  • Purpose: commercial and industrial activities; Table 2‑9 lists allowed uses and standards. See § 9102.03.030.
  • Typical uses:
    • C‑O (Office/limited commercial), C‑G (General commercial), C‑R (Regional commercial / shopping center), C‑M (Commercial‑manufacturing) — each has different allowed retail/restaurant/office mixes per Table 2‑8/2‑9.
  • Key dimensional standards (Table 2‑9 summary):
    • Maximum FAR: 0.5 in the commercial/industrial zones shown (C‑O, C‑G, C‑R, M‑1). § 9102.03.030.
    • Maximum height: C‑O 40 ft, C‑G 40 ft, C‑R up to 85 ft where the H overlay allows (otherwise 40 ft), M‑1 35 ft. See § 9102.03.030 and § 9102.11.040 (H overlay).
    • Setbacks: front 10 ft (C‑O/C‑M) or 0 ft where urban frontage is allowed (C‑G); side/rear setbacks vary and increase where abutting residential (typically 10–20 ft or more). See § 9102.03.030 and § 9102.03.040 for abutting‑residential rules.
    • Encroachment plane: where commercial abuts residential, a 45‑degree plane is enforced to limit bulk at the shared line — § 9102.03.040.

M‑1 (Industrial)

  • Purpose: light industrial uses; development standards are in Table 2‑9.
  • Key standards: max FAR 0.5, max height 35 ft (with overlay exceptions), setbacks per Table 2‑9. § 9102.03.030.

Downtown Zones (CBD, MU, DMU)

  • Purpose: encourage pedestrian activity, ground-floor commercial uses, and mixed-use intensity in downtown. See § 9102.05.040.
  • Key standards and special rules:
    • Encroachment / abutting residential: 45‑degree plane if abutting residential zones; when an alley separates properties, setbacks measured from the alley centerline (45‑degree plane measured from centerline). § 9102.05.040.B.
    • No parking in required front/street side setbacks; front setbacks facing primary streets must be landscaped/public‑accessible with amenities. § 9102.05.040.C & D.
    • Minimum ground-floor height for commercial ground-floor uses: 12 ft 6 in. § 9102.05.040.D.
    • Roof decks: allowed in MU/DMU with a 5 ft setback from all building lines and guardrail/amenity exceptions to height up to +5 ft. § 9102.05.040.F.

Residential Flex Overlay Zone (R‑F / Live Oak, Las Tunas, CG with R‑F)

  • Purpose: allow denser residential development in identified opportunity areas while imposing specific overlay standards. See Table 2‑15 and § 9102.11.050.
  • Key standards:
    • Max height: up to 60 ft in some overlay areas (Table 2‑15). § 9102.11.050.
    • Residential density: minimum 30 units/acre and maximum 50 units/acre in specified overlay subareas (Live Oak, Las Tunas). § 9102.11.050 and Table 2‑15.
    • Setbacks: front 10 ft, side 10 ft, distance between structures 6 ft, open space 100 sf/unit. § 9102.11.050.

Overlay & Special-purpose zones

  • H (Special Height) Overlay: modifies maximum building heights in covered areas (see § 9102.11.040 and Table 2‑9 C‑R note).
  • RTE (Race Track Event) Overlay: regulates uses on Santa Anita Race Track property to limit impacts on residential neighborhoods — see § 9102.11.060 for the overlay purpose and limitations.
  • Specific Plan Zones (SP‑...): SP zones (SP‑SA1, SP‑SP, SP‑ALC) set their own development standards; where the specific plan is silent the base zone standards apply (§ 9102.13.040).

Quick reference table — decision‑relevant numeric standards

Standard / Use Typical value(s) in Arcadia Code Code Reference
Multifamily front setback (R‑2/R‑3) 25 ft § 9102.01.090
Multifamily max height 30 ft (exceptions apply) § 9102.01.090 / § 9102.01.100
Single‑family lot coverage 1‑story 45% / 2‑story 35% § 9102.01.040 (Tables)
Commercial max FAR (C‑O/C‑G/C‑R/M‑1) 0.5 § 9102.03.030
C‑R maximum height (overlay possible) 40 ft normally; up to 85 ft in C‑R with H overlay § 9102.03.030; § 9102.11.040
ADU side/rear setback 4 ft (for ADUs requiring ADU permit) § 9102.01.080(F)(3)
ADU max FAR effect ADU may not cause lot FAR to exceed 45% (subject to exceptions) § 9102.01.080(F)(2)
Downtown min ground‑floor height 12 ft 6 in § 9102.05.040.D
Encroachment plane abutting residential 45° plane from residential lot line § 9102.03.040 / § 9102.05.040.B

How the code treats design review, parking, and other related controls

  • Development standards in Division 3 (site planning/general standards) interact with district tables; Site Plan and Design Review is commonly required for structures subject to the residential flex overlay and many multifamily or commercial projects — see the Arcadia Design Review page for procedures; design rules and objective development standards apply to ministerial streamlined housing where applicable. § 9107.19 and § 9102.01.170 describe applicability and objective standards.
  • Parking: off‑street parking dimensions and counts are specified in § 9103.07 and in tables that accompany each zone; for example ADU parking rules are spelled out in § 9102.01.080(F)(7) (generally 1 space per ADU with listed exceptions). See the Arcadia Parking page for applied formulas.
  • The Code refers applicants to the California Building Standards Code for building‑code matters (Title 24) — design envelope (setbacks/height/FAR/coverage) is a zoning function while structural/safety standards are Title 24 matters. See the California Building Standards Code reference.

(First mention links: design review, parking, overlays, ADUs, and Title 24 are linked above to the internal Arcadia pages.)

Checklist

  • Confirm the base zoning designation for the parcel on the official Zoning Map (Section 9101.04.010) and note any overlays (H, R‑F, RTE, SP).
  • Read the applicable zone’s Table (e.g., Table 2‑6 for R‑2/R‑3, Table 2‑9 for commercial) and extract: setbacks, height, FAR, lot coverage, density. (§ 9102.01.090, § 9102.03.030).
  • If proposing ADUs, confirm which ADU pathway applies (building‑permit only vs ADU permit) and apply § 9102.01.080 limits (size, setbacks, parking).
  • Check whether the property abuts residential zones (apply 45° encroachment plane rules) or alley conditions (measure from alley centerline) — § 9102.03.040, § 9102.05.040.B.
  • Determine whether Site Plan and Design Review is required (see § 9107.19) and assemble objective design standards if you plan to pursue ministerial SB‑35 style approvals.
  • Confirm parking dimensions and counts (Table 3‑3 / § 9103.07) and ADU parking exceptions.
  • If an overlay or Specific Plan applies, review its separate text — specific plans govern within their boundaries (§ 9102.13.040).

Risks & Ambiguities

Issue Why it matters What to verify
Overlay superseding base zone Overlays such as H, R‑F, or a Specific Plan can change height, density or permitted uses — relying on base‑zone values may be wrong Verify applicable overlay boundaries and read the overlay rules (§ 9102.11.040, § 9102.11.050, § 9102.13.040) and the Zoning Map.
ADU size vs FAR/lot coverage interplay ADU limits are expressed both as absolute unit sizes and as constraints on lot FAR/coverage (e.g., 45% FAR cap for some ADUs) — conflicts can reduce allowable ADU size Check § 9102.01.080(F) for ADU caps and how the Code applies FAR/coverage vs absolute ADU size.
Encroachment/45° plane when abutting residential Encroachment plane limits building bulk — a plan that meets setback numbers may still violate the plane restriction Confirm abutting zone lines and measure the 45° plane from the lot line per § 9102.03.040 / § 9102.05.040.B.
Parcel‑specific exceptions (lot width, cul‑de‑sac, reversed corner) Tables include exceptions for unusual lot shapes that change minimum widths, setbacks, or heights Check the specific Table notes and § 9102.01.090/§ 9102.01.040 subitems for exceptions.
Design review vs ministerial objective standards Some streamlined approvals require strict compliance with “objective” standards; discretionary modifications disqualify ministerial paths Verify whether your project intends to use objective standards (§ 9102.01.170) or needs a modification/waiver (see § 9107.05 / design review rules).

Plain-English Summary

Arcadia’s Development Code sets fixed envelopes depending on zoning: single‑family blocks have front/side/rear setbacks and lot‑coverage caps (e.g., roughly 45% one‑story, 35% two‑story), multifamily zones use 25‑ft fronts and roughly 30‑ft heights with density caps, commercial zones typically use a 0.5 FAR and heights that can reach 40 ft–85 ft depending on overlays, and ADUs are allowed with explicit 4‑ft side/rear setbacks and the ADU‑specific size/FAR/lot‑coverage rules in § 9102.01.080. Always confirm overlays and parcel exceptions before design‑finalizing.

Source References

  • Arcadia Development Code, Division 2 (Zones) — Residential Zones tables and standards: § 9102.01.090, § 9102.01.100, § 9102.01.040.
  • Arcadia Development Code, Commercial & Industrial Zones — Table 2‑9: § 9102.03.030, § 9102.03.040.
  • Arcadia Downtown zones and development standards: § 9102.05.040 (encroachment plane, ground‑floor height, roof‑deck rules).
  • Arcadia ADU regulations: § 9102.01.080 (ADU pathways, size limits, setbacks, FAR/coverage and parking exceptions).
  • Overlay & Specific Plan rules: § 9102.11.040 (H overlay height), § 9102.11.050 (Residential Flex Overlay / Table 2‑15), § 9102.11.060 (RTE overlay), § 9102.13.040 (Specific Plans).
  • General Development Code title, purpose, and Zoning Map: § 9101.01.010, § 9101.04.010.
  • Parking & accessory structure standards referenced (garages/parking dimensions): § 9103.07 and accessory structure Table 2‑5.

Internal Arcadia pages used for context and linked above:

  • Arcadia zoning & planning overview: /us/california/arcadia
  • Arcadia Zoning: /us/california/arcadia/zoning
  • Arcadia Land Use: /us/california/arcadia/land-use
  • Arcadia Parking: /us/california/arcadia/parking
  • Arcadia Design Review: /us/california/arcadia/design-review
  • Arcadia Overlay Districts: /us/california/arcadia/overlay-districts
  • Arcadia ADUs: /us/california/arcadia/adu
  • California Building Standards Code (Title 24): /us/california/building-codes

Sources

Retrieved passages

  • Arcadia Zoning Code (Section 9102.01) High relevance
  • Arcadia Zoning Code (§ 4) High relevance
  • Arcadia Zoning Code (§ 4) High relevance
  • CBC § 9102.01.030 (Section 9102.01.030.) High relevance
  • Arcadia Zoning Code (Section 9103.05.030) High relevance
  • CBC § 66314 (§ 66314) High relevance
  • Arcadia Zoning Code (Section shall) High relevance
  • California Building Code High relevance
  • Arcadia Zoning Code (Section 9103.07) High relevance
  • Arcadia Zoning Code High relevance
  • Arcadia Zoning Code (section 66333) High relevance
  • California Fire Code High relevance
  • Arcadia Zoning Code (Section 9102.01.080) High relevance
  • Arcadia Zoning Code (§ 4) High relevance
  • CFC § 800 High relevance
  • Arcadia Zoning Code (Section 9107.19) Medium relevance

Cited sections

Frequently asked questions

What can I build on an R-1 lot in Arcadia?

You can build single‑family dwellings and allowed accessory structures subject to the R‑1 development standards (setbacks, lot coverage, heights) shown in the single‑family tables. Check the front/side/rear setback rows and the lot‑coverage limits (one‑story 45% / two‑story 35%) in the single‑family rules — see § 9102.01.040 for the table and notes.

What are Arcadia setback requirements for multifamily (R‑2 / R‑3)?

Standard multifamily setbacks in Table 2‑6 are 25 ft front, 10 ft side, 10 ft rear; exceptions and special measurements are described in the multifamily development standards at § 9102.01.090 and § 9102.01.100. Always check the table notes for lot‑width or reversed‑corner exceptions.

How high can I build in C‑G or C‑R zones?

Typical maximum is 40 ft in C‑G and C‑O; C‑R can reach 85 ft where the H overlay applies (otherwise 40 ft). See the commercial Table 2‑9 and the H overlay rules — § 9102.03.030 and § 9102.11.040.

Do I need design review in Arcadia?

Many projects (including those in overlays and most multifamily/mixed‑use proposals) require Site Plan and Design Review per § 9107.19; small ministerial projects or projects that meet objective standards under § 9102.01.170 may be processed differently. Consult the Design Review rules early.

What are the ADU development standards in Arcadia?

ADU rules are in § 9102.01.080: typical provisions include 4‑ft side/rear setbacks for ADUs that require an ADU permit, maximum detached/attached ADU sizes (e.g., 850 sf studio/1‑bed; 1,000 sf 2+ bed for permit‑required ADUs), ADU‑related FAR/lot‑coverage caps (e.g., lot FAR may not exceed 45% for certain ADUs), and general ADU parking rules (usually 1 space per ADU with listed exceptions).

How does Arcadia treat FAR and lot coverage for commercial projects?

Commercial and industrial zones use Table 2‑9; FAR is commonly 0.5 for the listed commercial/industrial zones (C‑O, C‑G, C‑R, M‑1). Check § 9102.03.030 and the right‑hand column notes for additional restrictions and overlay exceptions.

What is the 45‑degree encroachment plane?

When a commercial or taller building abuts residential zoning, no part of the building can penetrate a 45° plane projected from ground level at the residential property line; downtown rules are similar and measure from the alley centerline where an alley separates properties. See § 9102.03.040 and § 9102.05.040.B.

Can overlays change the allowed density or height on my lot?

Yes. Overlays such as the Residential Flex Overlay and the H (height) Overlay explicitly modify allowed height and density (e.g., R‑F Table 2‑15 allows 30–50 units/acre and heights up to 60 ft in some subareas). Always confirm overlay applicability on the Zoning Map and read the overlay section (e.g., § 9102.11.050).

Are parking spaces allowed in front setbacks?

No. The Code prohibits parking in required front or street side setbacks (and in landscaped setback areas) — see § 9102.05.040.C and the parking/driveway standards in § 9103.07.

If my lot is in a Specific Plan (SP) zone, which rules apply?

A Specific Plan governs land use and development for properties within its boundary; where the Specific Plan is silent, the base zone in Division 2 applies per § 9102.13.040. Confirm the SP text for any unique development standards and requirements. ---

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