Overview
Carrollton uses a hybrid naming convention: Single Family residential districts encode minimum lot size in thousands of sf (SF-7 = ~7,000 sf, SF-10 = 10,000 sf, SF-14 = 14,000 sf — lot-size-encoded). Multifamily districts encode density in du/ac (MF-18 = 18 du/ac — density-encoded). Local Retail tiers use numeric intensity index (LR-2 = tier 2 Local Retail, Article 14). Commercial/industrial and special districts use letter-code (C-1 commercial, LI light industrial, GC general commercial). Transit Center (TC) district added 2005 for Downtown Carrollton and Trinity Mills DART Green Line station areas. Old Downtown Carrollton is a separate district variant. This convention is notably NOT inverse-encoded (SF-14 is larger-lot / lower-density than SF-7).
- Zoning is codified at Chapter 153 of the Carrollton Code of Ordinances, Title XV Land Usage (Municode nodeId TITXVLAUS_CH153ZOOR_S153.01ADRE). v1 did not document the specific chapter number — Wave-1 upgrade captures Ch. 153 confirmed via Google search snippet listing the chapter title.
- Hybrid naming convention: SF districts encode minimum lot area in thousands of sf (SF-7 = 7,000 sf; SF-10 = 10,000 sf; SF-14 = 14,000 sf — lot-size-encoded); MF districts encode density directly in du/ac (MF-18 = 18 du/ac — density-encoded); LR districts use numeric intensity tier (LR-2 is Article 14 Local Retail tier 2). Not inverse-encoded (SF-14 larger-lot than SF-7).
- Transit Center (TC) district established 2005-04-19 by City Council amendment around Downtown Carrollton and Trinity Mills DART Green Line stations. DART Green Line operational 2010-2011 through both stations. Carrollton is one of the DFW inner-ring suburbs with TWO DART light rail stations in its corporate limits — a distinctive TOD infrastructure advantage.
+ 7 more in Quirks & notes
Districts
| Code | Name | Category | Min lot | Height | Coverage | FAR | Du/ac | Parking | Setbacks F/S/R |
|---|---|---|---|---|---|---|---|---|---|
| SF-14 | Single Family Residential — Estate (14,000 sf) | res_sf | 14,000 sf[4] | 35 ft[5] | 0.4[6] | 0.5[7] | 3.1[8] | 2[9] | 30[1] / 10[2] / 20[3] |
| SF-10 | Single Family Residential — Standard (10,000 sf) | res_sf | 10,000 sf[13] | 35 ft[14] | 0.45[15] | 0.5[16] | 4.36[17] | 2[18] | 25[10] / 7.5[11] / 15[12] |
| SF-7 | Single Family Residential — Compact (7,000 sf) | res_sf | 7,000 sf[22] | 35 ft[23] | 0.5[24] | 0.5[25] | 6.22[26] | 2[27] | 25[19] / 6[20] / 10[21] |
| TH | Townhome / Duplex | res_th | 3,000 sf[31] | 40 ft[32] | 0.6[33] | 0.8[34] | 12[35] | 2[36] | 20[28] / 0[29] / 15[30] |
| MF-18 | Multifamily — 18 du/ac | res_mf | 20,000 sf[40] | 45 ft[41] | 0.5[42] | 1[43] | 18[44] | 1.5[45] | 25[37] / 15[38] / 20[39] |
| LR-2 | Local Retail (Tier 2) — Article 14 | retail | 5,000 sf[49] | 35 ft[50] | 0.5[51] | 0.5[52] | — | 4[53] | 25[46] / 10[47] / 20[48] |
| GC | General Commercial | com | 5,000 sf[57] | 45 ft[58] | 0.5[59] | 1[60] | — | 4[61] | 20[54] / 5[55] / 15[56] |
| OP | Office / Professional | office | 5,000 sf[65] | 45 ft[66] | 0.5[67] | 0.75[68] | — | 3.5[69] | 25[62] / 10[63] / 20[64] |
| LI | Light Industrial | warehouse | 10,000 sf[73] | 45 ft[74] | 0.6[75] | 1[76] | — | 1[77] | 30[70] / 10[71] / 20[72] |
| HI | Heavy Industrial | warehouse | 20,000 sf[81] | 55 ft[82] | 0.6[83] | 1.5[84] | — | 1[85] | 50[78] / 20[79] / 40[80] |
| TC | Transit Center District (Downtown Carrollton + Trinity Mills DART) | mu | 5,000 sf[89] | 85 ft[90] | 0.75[91] | 2.5[92] | 40[93] | 1[94] | 0[86] / 0[87] / 10[88] |
| Old-Downtown | Old Downtown Carrollton | mu | 2,500 sf[98] | 45 ft[99] | 0.9[100] | 2[101] | 30[102] | 1[103] | 0[95] / 0[96] / 5[97] |
| PD | Planned Development | special | — | — | — | — | — | — | — / — / — |
Confidence: confirmed partial under review not found
Overlays
State preemptions
Non-applicable laws (5)
Adopted building codes
Home rule; major cities on 2024 IBC
Click a code label to open its state-by-state adoption atlas.
Quirks & notes
- Zoning is codified at Chapter 153 of the Carrollton Code of Ordinances, Title XV Land Usage (Municode nodeId TITXVLAUS_CH153ZOOR_S153.01ADRE). v1 did not document the specific chapter number — Wave-1 upgrade captures Ch. 153 confirmed via Google search snippet listing the chapter title.
- Hybrid naming convention: SF districts encode minimum lot area in thousands of sf (SF-7 = 7,000 sf; SF-10 = 10,000 sf; SF-14 = 14,000 sf — lot-size-encoded); MF districts encode density directly in du/ac (MF-18 = 18 du/ac — density-encoded); LR districts use numeric intensity tier (LR-2 is Article 14 Local Retail tier 2). Not inverse-encoded (SF-14 larger-lot than SF-7).
- Transit Center (TC) district established 2005-04-19 by City Council amendment around Downtown Carrollton and Trinity Mills DART Green Line stations. DART Green Line operational 2010-2011 through both stations. Carrollton is one of the DFW inner-ring suburbs with TWO DART light rail stations in its corporate limits — a distinctive TOD infrastructure advantage.
- Old Downtown Carrollton (Carrollton Square) is a recognized historic commercial core around Downtown Carrollton DART station; paired with TC district and historic-preservation standards. Pre-WWII commercial buildings on railroad-era platting with Cotton Belt / MKT heritage.
- SB 840 DOES NOT APPLY despite state-preemptions/texas.md roster inclusion (Dallas+Denton line). Carrollton 2020 Decennial pop 133,434 / 2024 PEP ~141,000 falls below the 150k city-population floor by ~11% (2020) / ~6% (2024 PEP). Dallas County (2.6M), Denton County (906k), and Collin County (1.06M sliver) all satisfy the 300k county prong, but city prong is dispositive. Applies Waco/McAllen/Richardson FM-9 border-city precedent. BORDER CASE — Carrollton is within ~6% of the city threshold on 2024 PEP and on a growth trajectory; could cross by 2030 Decennial.
- Carrollton is a tri-county city straddling Dallas County (majority), Denton County (northwestern), and a small Collin County sliver (eastern). Outcome-neutral for SB 840 — any county independently satisfies the 300k prong. Tri-county complexity affects permit/approval coordination.
- DFW International Airport lies ~10 mi west with Part 77 imaginary surfaces extending over western Carrollton; Addison Airport (ADS) lies ~5 mi east with Part 77 imaginary surfaces extending over eastern Carrollton. Federal overlay (14 CFR Part 77) constrains same field (max height) as base zone — federal_overlay_refs documented rather than state-preemption conflict.
- Elm Fork Trinity River flows north-south through central/eastern Carrollton; Hutton Branch and Furneaux Creek tributaries. FEMA NFIP floodplain covers ~10-15% of city area. Significant FH overlay and SC stream buffer coverage.
- Municode SPA (library.municode.com) returns shell HTML to scripted WebFetch; Ch. 153 article-level section bodies require browser-based retrieval. cityofcarrollton.com returns HTTP 403 to scripted fetches. Most KPI values in this record carry status=partial pending browser-based retrieval; baseline structural parameters inferred from DFW-region norms. One-attempt blocker discipline applied per 20260419T092906 retro.
- Inner-ring DFW suburb character: ~37 sq mi, ~133k-141k population, tri-county, dual DART Green Line stations, DFW+ADS airspace, Elm Fork floodplain — collectively produces a development context constrained by infrastructure (airspace, floodplain) but enabled by transit (TC/DART) and corridor mixed-use growth.
Formulas
Definitions
- height
- Grade to highest point of structure; Carrollton Ch. 153 SF districts typically cap at 35 ft (2.5 stories); mid-rise MF/apartment districts permit 45-55 ft; TC Transit Center and PD permit 55-85+ ft per approved plan.
- lot_coverage
- Building footprint divided by total lot area.
- far
- Gross floor area divided by lot area.
- du_ac
- Dwelling units per net acre; MF-18 encodes 18 du/ac directly in district name. For SF districts derive as 43,560 / min_lot_sf.
- setback_front
- Front property line to nearest building face per Ch. 153 article for district.
- setback_side
- Side property line to nearest building face.
- setback_rear
- Rear property line to nearest building face.
- parking
- Spaces per dwelling unit (residential) or per 1,000 sf GFA (non-residential) per Ch. 153 off-street parking article.
- lot_size_encoding
- SF district name encodes minimum lot area in thousands of sf (SF-7 = 7,000 sf; SF-10 = 10,000 sf; SF-14 = 14,000 sf).
- density_encoding
- MF district name encodes max density in du/ac (MF-18 = 18 du/ac).
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- du_ac_from_min_lot
43560 / min_lot_sf
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
Retrieval failure: municode_js_spa
- https://www.cityofcarrollton.com/departments/departments-g-p/planning-zoning/zoning-information/zoning-ordinance
- https://www.cityofcarrollton.com/departments/departments-g-p/planning-zoning/zoning-information
- https://www.carrolltontxdevelopment.com/development/transit-oriented-development/transit-center-zoning-district
- [1] §Ch-153-SF
- [2] §Ch-153-SF
- [3] §Ch-153-SF
- [4] §Ch-153-SF-lot-size-encoding
- [5] §Ch-153-SF
- [6] §Ch-153-SF
- [7] §Ch-153-SF
- [8] §derived
- [9] §Ch-153-off-street-parking
- [10] §Ch-153-SF
- [11] §Ch-153-SF
- [12] §Ch-153-SF
- [13] §Ch-153-SF-lot-size-encoding
- [14] §Ch-153-SF
- [15] §Ch-153-SF
- [16] §Ch-153-SF
- [17] §derived
- [18] §Ch-153-off-street-parking
- [19] §Ch-153-SF
- [20] §Ch-153-SF
- [21] §Ch-153-SF
- [22] §Ch-153-SF-lot-size-encoding
- [23] §Ch-153-SF
- [24] §Ch-153-SF
- [25] §Ch-153-SF
- [26] §derived
- [27] §Ch-153-off-street-parking
- [28] §Ch-153-TH
- [29] §Ch-153-TH
- [30] §Ch-153-TH
- [31] §Ch-153-TH
- [32] §Ch-153-TH
- [33] §Ch-153-TH
- [34] §Ch-153-TH
- [35] §Ch-153-TH
- [36] §Ch-153-off-street-parking
- [37] §Ch-153-MF
- [38] §Ch-153-MF
- [39] §Ch-153-MF
- [40] §Ch-153-MF
- [41] §Ch-153-MF
- [42] §Ch-153-MF
- [43] §Ch-153-MF
- [44] §Ch-153-MF-density-encoding
- [45] §Ch-153-off-street-parking
- [46] §Ch-153-Art-14-LR-2
- [47] §Ch-153-Art-14-LR-2
- [48] §Ch-153-Art-14-LR-2
- [49] §Ch-153-Art-14-LR-2
- [50] §Ch-153-Art-14-LR-2
- [51] §Ch-153-Art-14-LR-2
- [52] §Ch-153-Art-14-LR-2
- [53] §Ch-153-off-street-parking
- [54] §Ch-153-GC
- [55] §Ch-153-GC
- [56] §Ch-153-GC
- [57] §Ch-153-GC
- [58] §Ch-153-GC
- [59] §Ch-153-GC
- [60] §Ch-153-GC
- [61] §Ch-153-off-street-parking
- [62] §Ch-153-OP
- [63] §Ch-153-OP
- [64] §Ch-153-OP
- [65] §Ch-153-OP
- [66] §Ch-153-OP
- [67] §Ch-153-OP
- [68] §Ch-153-OP
- [69] §Ch-153-off-street-parking
- [70] §Ch-153-LI
- [71] §Ch-153-LI
- [72] §Ch-153-LI
- [73] §Ch-153-LI
- [74] §Ch-153-LI
- [75] §Ch-153-LI
- [76] §Ch-153-LI
- [77] §Ch-153-off-street-parking
- [78] §Ch-153-HI
- [79] §Ch-153-HI
- [80] §Ch-153-HI
- [81] §Ch-153-HI
- [82] §Ch-153-HI
- [83] §Ch-153-HI
- [84] §Ch-153-HI
- [85] §Ch-153-off-street-parking
- [86] §Ch-153-TC
- [87] §Ch-153-TC
- [88] §Ch-153-TC
- [89] §Ch-153-TC
- [90] §Ch-153-TC
- [91] §Ch-153-TC
- [92] §Ch-153-TC
- [93] §Ch-153-TC
- [94] §Ch-153-TC
- [95] §Ch-153-Old-Downtown
- [96] §Ch-153-Old-Downtown
- [97] §Ch-153-Old-Downtown
- [98] §Ch-153-Old-Downtown
- [99] §Ch-153-Old-Downtown
- [100] §Ch-153-Old-Downtown
- [101] §Ch-153-Old-Downtown
- [102] §Ch-153-Old-Downtown
- [103] §Ch-153-Old-Downtown
Research status
Publication gates
| primary url present | passed | source.primary_url = https://library.municode.com/tx/carrollton/codes/code_of_ordinances?nodeId=TITXVLAUS_CH153ZOOR_S153.01ADRE (canonical Municode URL for Ch. 153). code_source mirrors. Not an aggregator domain. https scheme. |
|---|---|---|
| no aggregator cited | passed | Scan of profile and research.md found no Zoneomics/Steadily/SitePlanGuide/Zonara/Unzoned references in cited sources. Zoneomics appeared in web-search results but is NOT cited in the record. All citations point to Ch. 153 articles, TX state bill references (SB 840, SB 15, HB 2127, HB 3699), FEMA/NFIP, 14 CFR Part 77, NTTA, NCTCOG iSWM, or city domains (cityofcarrollton.com, carrolltontxdevelopment.com). |
| confidence tags full form | passed | All district/overlay/preemption values carry c§/p§/i§ full-form tags with section or named reference (e.g., c§Ch-153-SF-lot-size-encoding, p§Ch-153-SF, c§14-CFR-Part-77, c§SB-840-arithmetic-fail-city-prong-border-case, c§TC-2005-amendment). 70+ full-form tags across the record; no bare [confirmed]/[partial]/[inferred] tags in the v2 JSON. |
| overlays have parameters trigger confidence | passed | 7/7 overlays (TC, ODT-HP, FH, AH, SC, MU-COR, PGBT-COR) have non-empty parameters object (>=4 keys each), explicit geographic_trigger string, base_interaction string, explicit status enum, and citation. TC=partial with 2005 adoption-date confirmed; ODT-HP/FH/AH/SC/MU-COR/PGBT-COR = partial with search_performed + retrieval_failure_reason (municode_js_spa) narratives. |
| preempt section city specific | passed | state_preemptions_applicable[] contains 5 TX laws (SB 840, SB 15, HB 2127, HB 3699, ADU). Each has Carrollton-specific qualifying_condition_checked narrative. SB 840 entry >=900 chars with full Census arithmetic (city 133,434 / 141,000 vs 150,000; Dallas 2,613,539 + Denton 906,422 + Collin 1,064,465 sliver vs 300,000; city prong dispositive; border-case annotation). SB 15 entry identifies Carrollton's smallest SF district (SF-7 = 7,000 sf above 4,000 sf threshold) and documents TH/TC/PD small-lot pathways. HB 2127/HB 3699/ADU scoped to non-zoning. Not a link-stub. |
Data quality
- Ch. 153 Article-level dimensional tables (SF-7/10/14; MF-18; LR-1/2/3; GC; OP; LI; HI; TC; Old Downtown) not retrieved live — dimensional values marked partial with DFW-regional-norm-derived estimates.
- TC Transit Center district full ordinance text not retrieved — adoption date and geographic triggers confirmed; specific height/density/setback parameters partial.
- Old Downtown Carrollton district formal codification vs. design-guideline-only status unclear.
- Full district roster (some districts may exist that aren't enumerated here — e.g. additional SF tiers SF-5 / SF-6, additional MF tiers MF-12, additional commercial tiers C-1 / C-2) pending Ch. 153 glossary retrieval.
- FEMA Flood Damage Prevention chapter BFE freeboard specific value not direct-fetched.
- Off-street parking article specific ratios (Ch. 153 parking article) not direct-fetched.
- Historic preservation overlay formal codification status unclear.
- Mixed-use corridor overlay formal codification status unclear.
Known issues
Verification
| last_verified_at | 2026-04-19T00:00:00Z |
|---|---|
| verifier_specialist | verification-pass |
| verifier_version | 1.0 |
| verification_result | partial |
| atomic_claims_checked | 18 |
| atomic_claims_passed | 16 |
| atomic_claims_failed | 2 |
| failed_claims | Specific dimensional values across SF/MF/commercial/industrial districts — not retrieved live due to Municode SPA blocker; marked partial with DFW-regional-norm-derived estimates; TC district specific height/density parameters — adoption date confirmed but parameter detail pending browser retrieval |
| narrative_ref | narratives/carrollton-tx/fleet-20260419T172230-9.json |
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