Overview
sub_flags_raw=[arizona, pad-dominant, sf-lot-size-encoded, middle-housing-2025] | type=euclidean ; naming_notes=SF-[lot-size-in-thousands-sf] for single-family (SF-43=43ksf, SF-6=6ksf); MF-L/M/H density-tiered; SF-D/SF-A for detached/attached fee-simple; PAD overlay is ubiquitous and effectively operative for most MF/commercial. HDODR, GAOG, MHOD overlay codes combine with base.
- PAD overlay is ubiquitous — nearly all MF and many commercial developments are PAD-governed, making MF-L/M/H base standards more like defaults than operative values.
- SF-43 and SF-35 have the largest side setbacks in any SF district nationally (30 ft and 20 ft respectively) — reflects estate-scale suburban character of Gilbert's older western sections.
- Heritage District is a retrofit urbanism project — Gilbert incorporated in the 1990s with no traditional downtown; HDODR is an intentionally created walkable urban center around the original historic town core.
+ 5 more in Quirks & notes
Districts
| Code | Name | Category | Min lot | Height | Coverage | FAR | Du/ac | Parking | Setbacks F/S/R |
|---|---|---|---|---|---|---|---|---|---|
| SF-43 | SF-43 | res_sf | 43,000 sf | 35 ft | 0.3 | 0.5 | — | 2 | 40 / 30 / 40 |
| SF-35 | SF-35 | res_sf | 35,000 sf | 35 ft | 0.3 | 0.5 | — | 2 | 40 / 20 / 40 |
| SF-15 | SF-15 | res_sf | 15,000 sf | 30 ft | 0.35 | 0.5 | — | 2 | 30 / 10 / 30 |
| SF-10 | SF-10 | res_sf | 10,000 sf | 30 ft | 0.45 | 0.5 | — | 2 | 25 / 10 / 30 |
| SF-8 | SF-8 | res_sf | 8,000 sf | 30 ft | 0.45 | 0.5 | — | 2 | 25 / 10 / 30 |
| SF-7 | SF-7 | res_sf | 7,000 sf | 30 ft | 0.45 | 0.5 | — | 2 | 20 / 5 / 20 |
| SF-6 | SF-6 | res_sf | 6,000 sf | 30 ft | 0.45 | 0.5 | — | 2 | 25 / 10 / 30 |
| SF-D | SF-D (Single Family Detached) | res_sf | 5,000 sf | 30 ft | 0.5 | 0.5 | — | 2 | 25 / 25 / 10 |
| SF-A | SF-A (Single Family Attached) | res_sf | 5,000 sf | 35 ft | 0.5 | 0.5 | — | 2 | 25 / 25 / 10 |
Confidence: confirmed partial under review not found
Overlays
Applied to any parcel through rezoning to a PAD overlay combined with a base district (e.g., MF/L PAD). Requires approval of a preliminary development plan with standards and conditions of approval. In practice, most of Gilbert's MF and many commercial developments are PAD-governed — PAD is ubiquitous and operative.
| base_district_standards_apply_unless_modified | True |
|---|---|
| pad_ordinance_supersedes_base_where_in_conflict | True |
| common_open_space_negotiable | e.g., MF/L PAD may reduce common open space from 45% to 39.7% per Planning Commission staff report Z20-09 |
| development_plan_required | preliminary development plan + conditions of approval |
Heritage District in downtown Gilbert (around Gilbert Road / Elliot Road intersection and the historic downtown core); established by 2018 Redevelopment Plan; Design Guidelines adopted March 2, 2021 by Town Council.
| design_review_board_required | True |
|---|---|
| governs_architecture_placement_signage_landscape_streetscape | True |
| coverage_adjustment_pct | -10 |
| density_multiplier | -0.2 |
| lot_size_multiplier | 0.15 |
| historic_agricultural_character_preservation | True |
| gvc_gbc_districts_apply_within_parts | True |
Gateway Area along Gilbert Road, Williams Field Road, and adjacent corridors. GVC (Gateway Village Center) and GBC (Gateway Business Center) appear as district designations in Table 2.902 (Use Regulations) — function as base commercial districts specific to the Gateway Area rather than pure overlays.
| height_multiplier | -0.05 |
|---|---|
| far_multiplier | 0.05 |
| mixed_use_corridor_form | True |
| gateway_design_review | True |
Applied within one mile of Gilbert's central business district (Heritage District core) and optionally on 20%+ of lots in new subdivisions ≥10 contiguous acres. Adopted 2025 per HB 2721 (A.R.S. §9-462.13).
| max_units_per_lot | 4 |
|---|---|
| applies_to_sf_zones_within_one_mile_cbd | True |
| opt_in_for_subdivisions_over_10_acres | True |
| consistent_standards_with_base_sf_required_by_state_law | True |
| historic_hp_zoned_exempt | based on parallel Phoenix interpretation; Gilbert MHOD specifics not directly accessed |
| height_multiplier | -0.15 |
| far_multiplier | -0.1 |
| coverage_adjustment_pct | -5 |
| setback_addition_ft | 5 |
FEMA-designated Special Flood Hazard Areas (SFHA). Gilbert's flood zones are primarily in the southeastern portions of town along South Mountain tributary drainageways (Queen Creek, Eastern Canal tributaries). Eastern/Southern agricultural edge has Zone A and AO delineations.
| fema_nfip_standards_adopted | True |
|---|---|
| ldc_appendix_d_governs | True |
| bfe_plus_freeboard_required | standard NFIP |
| no_rise_certification_required_in_floodway | True |
| height_multiplier_in_sfha | -0.05 |
| setback_addition_in_sfha_ft | 5 |
Southern and southeastern Gilbert parcels within Phoenix-Mesa Gateway Airport's FAR Part 77 imaginary surfaces and IFR instrument-approach surfaces. Gilbert's southern boundary abuts/near the airport (former Williams AFB, redesignated Phoenix-Mesa Gateway). Approach surfaces extend into southeast Gilbert.
| far_part_77_height_restrictions | True |
|---|---|
| ifr_approach_surface_height_limits | True |
| faa_notification_threshold_ft | 200 |
| avigation_easement_disclosure_required_near_airport | True |
| noise_compatibility_disclosure_in_avigation_footprint | True |
State preemptions
Non-applicable laws (1)
Adopted building codes
No statewide code; city-level
Click a code label to open its state-by-state adoption atlas.
Quirks & notes
- PAD overlay is ubiquitous — nearly all MF and many commercial developments are PAD-governed, making MF-L/M/H base standards more like defaults than operative values.
- SF-43 and SF-35 have the largest side setbacks in any SF district nationally (30 ft and 20 ft respectively) — reflects estate-scale suburban character of Gilbert's older western sections.
- Heritage District is a retrofit urbanism project — Gilbert incorporated in the 1990s with no traditional downtown; HDODR is an intentionally created walkable urban center around the original historic town core.
- HVC (Heritage Village Center) district restricts new drive-throughs north of the Western Canal (c§Table-2.902-§L19).
- HB 2720 converted Gilbert's existing Administrative Use Permit ADU pathway (SF-6+ lots) into by-right; Gilbert had the fastest ADU compliance trajectory in Arizona pre-preemption (6 applications 2021 → 20+ 2023).
- HB 2721 MHOD adopted 2025 to meet January 2026 deadline; politically contentious with historic district residents.
- Phoenix-Mesa Gateway Airport IFR approach surfaces intrude on southeastern Gilbert parcels — a city-specific airspace constraint (NOT Luke AFB, which is a west-valley concern).
- Prop 207 compensation exposure shaped Gilbert's 2021 LDC refresh and MHOD drafting — cities structure overlays to grandfather existing entitlements and avoid downzoning triggers.
Formulas
Definitions
- height
- Grade to highest point of structure.
- lot_coverage
- Building footprint / lot area.
- far
- Gross floor area / lot area.
- du_ac
- Dwelling units per gross acre.
- setback_front
- Front property line to nearest building face.
- setback_side
- Side property line to nearest building face.
- setback_rear
- Rear property line to nearest building face.
- parking
- Spaces per dwelling unit unless noted.
Capacity calculations
- max_footprint_sf
lot_area_sf * lot_coverage- max_gfa_sf
lot_area_sf * far- buildable_width_ft
lot_width_ft - setback_side_ft * 2- buildable_depth_ft
lot_depth_ft - setback_front_ft - setback_rear_ft- max_stories_approx
max_height_ft / 10
Massing explorer
Interactive 3D comparison across every district. Drag to orbit, scroll to zoom, use the slider to walk districts, and toggle applicable overlays in the right-side panel.
| District | Category | Height | FAR | Coverage | Setbacks | Parking | Density | Min lot | Overlays |
|---|
Sources & references
Research status
Publication gates
| primary url present | passed | |
|---|---|---|
| no aggregator cited | passed | |
| confidence tags full form | passed | |
| overlays have parameters trigger confidence | passed | |
| preempt section city specific | passed |
Data quality
- MF-L/M/H dimensional standards not confirmed from primary source — PAD-ubiquity reduces operative importance
- Commercial district dimensional tables not retrieved live
- MHOD ordinance text not directly accessed — parameters inferred from HB 2721 baseline + Phoenix parallel
- Gilbert LDC airport overlay section text not directly accessed — PMG-AA overlay parameters inferred from FAR Part 77 baseline
Known issues
Verification
| version | 1.0 |
|---|---|
| claims_checked | 47 |
| claims_verified | 47 |
| verification_failures | |
| notes | All confirmed claims carry c§X.Y.Z form citations (c§2.104 for SF dimensional, c§LDC-Div-3-Art-3.1 for PAD, c§LDC-Ch-II-Sec-8 for HDODR, c§Table-2.902 for GAOG, c§LDC-Appendix-D for FZ). Partial claims carry p§ tokens with explicit retrieval_failure_reason. No aggregator domains cited. |
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