Overview
Code type
euclidean
Naming convention
mixed
Standard suburban TN Euclidean code with an explicit Forest/Agricultural/Residential (FAR) base and a Traditional Neighborhood (TN) overlay-like base district. Historic Zoning District (H-1) governed via §§151.195-205. Floodplain overlay at §§151.090-102. Airport hazard regulations at §§151.285-292. | naming_convention_raw=letter-code + numeric/qualifier (R-1/R-1A/R-2/R-2A/R-3/R-3A/R-4 = density ladder; R-L = large-lot/estate; R-L1 = 1-acre lots; R-25 = ~25k sf lots; FAR = forest/agriculture/residential; R-TH = townhouse; T = mobile-home-park; TN = Traditional Neighborhood; MU = mixed-use; NC/MPO/SCC/CB/GC commercial ladder; RI/GI industrial) ; sub_flags_raw=[suburban-sunbelt, memphis-metro] ; narrative_ref=narratives/collierville-tn/drain-20260518T072625-tn-01.json
Worth knowing
- Cloudflare-gated canonical source — codelibrary.amlegal.com/codes/collierville returns HTTP 403 with cf-mitigated:challenge header to all scripted access (curl, WebFetch). Wayback Machine partially caches the chapter TOC (sid 41935 / 41936) but not the dimensional / district detail pages (CDX confirmed no snapshot of sid 0-0-0-43608 for §151.027). Town's own colliervilletn.gov returns Akamai 403; elaws.us mirror returns 503. Partial bypass: MTAS (Tennessee Municipal Technical Advisory Service, https://www.mtas.tennessee.edu/system/files/mrln/mknowledge/reference/) hosts a Collierville reference PDF for §151.006 D General Provisions; extractable text yields confirmed dim-cited content for accessory-structure rules, flagpoles, agricultural livestock, and §151.003 building-height definition. §151.027 base-district bulk-regulations table still requires Playwright stealth, manual PDF acquisition from the Town Hall planning office, or future Wayback backfill of sid 43608.
- Two-tier residential ladder structure (R-1/R-1A, R-2/R-2A, R-3/R-3A) — Collierville uses paired A-suffix tiers within R-1, R-2, and R-3 density bands — six districts spanning what most TN cities cover in three. v1 profile completely omitted R-2A. The A-variants typically have slightly different lot-width / setback rules from the base. — [§§151.036-151.041]
- Separate T (Mobile Home Park) and TN (Traditional Neighborhood) — Collierville has TWO distinct districts at §151.043 (T Mobile Home Park Residential) and §151.049 (TN Traditional Neighborhood). v1 profile conflated them under a single 'T Traditional Neighborhood' entry, which is materially wrong — they are unrelated use categories. — [§151.043 (T); §151.049 (TN)]
+ 5 more in Quirks & notes
Districts
res_sf 7res_mf 5com 5mu 2ind 2spec 1
| Code | Name | Category | Min lot | Height | Coverage | FAR | Du/ac | Parking | Setbacks F/S/R |
|---|---|---|---|---|---|---|---|---|---|
| FAR | Forest-Agricultural-Residential District | spec | — | — | — | — | — | — | — / — / — |
| R-L | R-L Large Lot / Estate Development Residential District | res_sf | — | — | — | — | — | — | — / — / — |
| R-L1 | R-L1 Large Lot / One Acre Residential District | res_sf | — | — | — | — | — | — | — / — / — |
| R-25 | R-25 Low Density Residential District | res_sf | — | — | — | — | — | — | — / — / — |
| R-1 | R-1 Low Density Residential District | res_sf | — | — | — | — | — | — | — / — / — |
| R-1A | R-1A Low Density Residential District | res_sf | — | — | — | — | — | — | — / — / — |
| R-2 | R-2 Medium Density Residential District | res_sf | — | — | — | — | — | — | — / — / — |
| R-2A | R-2A Medium Density Residential District | res_sf | — | — | — | — | — | — | — / — / — |
| R-3 | R-3 High Density Residential District | res_mf | — | — | — | — | — | — | — / — / — |
| R-3A | R-3A High Density Residential District | res_mf | — | — | — | — | — | — | — / — / — |
| R-4 | R-4 Multi-Family Residential District | res_mf | — | — | — | — | — | — | — / — / — |
| T | T Mobile Home Park Residential District | res_mf | — | — | — | — | — | — | — / — / — |
| R-TH | R-TH Townhouse Residential District | res_mf | — | — | — | — | — | — | — / — / — |
| TN | TN Traditional Neighborhood District | mu | — | — | — | — | — | — | — / — / — |
| MU | MU Mixed Use District | mu | — | — | — | — | — | — | — / — / — |
| NC | NC Neighborhood Commercial District | com | — | — | — | — | — | — | — / — / — |
| MPO | MPO Medical-Professional Office District | com | — | — | — | — | — | — | — / — / — |
| SCC | SCC Shopping Center Commercial District | com | — | — | — | — | — | — | — / — / — |
| CB | CB Central Business District | com | — | — | — | — | — | — | — / — / — |
| GC | GC General Commercial District | com | — | — | — | — | — | — | — / — / — |
| RI | RI Restrictive Industrial District | ind | — | — | — | — | — | — | — / — / — |
| GI | GI General Industrial District | ind | — | — | — | — | — | — | — / — / — |
Confidence: confirmed partial under review not found
Overlays
H-1
H-1 Historic Zoning District
SPECLocally-designated historic districts established by Town BMA following Historic District Commission recommendation per §151.197 (Designation of Local Historic Districts). H-1 is an overlay applied to designated historic areas.
FP
Flood Hazard Areas
SPECAreas of special flood hazard identified by FEMA Flood Insurance Study and FIRM panels for Shelby County / Town of Collierville, established by §151.093.
AHO
Airport Hazard / Approach Surface Regulations
SPECApproach, transitional, horizontal, and conical surfaces around Charles W. Baker Airport (Millington / Memphis-area general aviation) as defined by Federal Aviation Regulations Part 77, applied via §151.288 Extent and Designations.
PD
Planned Development Overlay
SPECApplied via rezoning process to qualifying parcels meeting size requirements at §151.151; available for residential (§151.156), commercial/industrial (§151.157), mixed-use (§151.158), and seniors-housing (§151.159) planned developments.
DRC
Design Review Commission jurisdiction
SPECDevelopment subject to DRC review per §151.243 (typically non-residential, multi-family, and PD projects); exempt development listed at §151.244.
SHELBY-CO
Shelby County Coordination
SPECAll of Collierville is within Shelby County; county code cross-references for subdivision and flood management.
State preemptions
TN-STR-ACTapplies
Qualifying condition
Collierville is a Tennessee municipal corporation (Town of Collierville), incorporated 1850, located in Shelby County. TN STR Act applies to all 'local governmental units' in TN per §13-24-102. Inputs: TN municipal status (confirmed); statute effective 2018-05-24 with 2024 PC 963 amendment. | city_specific_note=Collierville STR ordinance (if any) text not extracted in this pass due to Cloudflare-gated source. Discovery of effective date + grandfathered-stock inventory required at site-selection stage.
Effect
Any Collierville STR ordinance cannot retroactively prohibit pre-existing lawfully operating STRs. Pre-ordinance STRs grandfathered in perpetuity. Prospective regulation (registration, occupancy, noise, tax) permitted; functional-denial schemes barred (2024 PC 963).
TN-IZ-BANapplies
Qualifying condition
Collierville is a TN municipal corporation; §6-54-127 applies to all 'local governmental units'. Mandatory IZ tied to zoning approval is preempted; voluntary density-bonus / attainable-housing incentive programs permitted under 2024 HB 2623 / SB 2496. | city_specific_note=No mandatory IZ percentage observed in Chapter 151 TOC scan. mandatory_iz_preempted = false unless future ordinance review reveals one.
Effect
Collierville cannot enact mandatory affordable set-asides tied to zoning approvals, building permits, or COs. Voluntary density-bonus or direct-subsidy-tied affordability permitted.
TN-MH-PARITYapplies
Qualifying condition
Collierville residential districts permit site-built SFD across multiple tiers (R-L through R-2A); parity requirement attaches. Collierville also has a separate T Mobile Home Park District (§151.043), which is permissible so long as MH siting elsewhere in residential districts is on parity with site-built SFD compatibility standards. | city_specific_note=Existence of T Mobile Home Park District (§151.043) as a separate district is permissible. Need to verify compatibility-standard parity (roof pitch, foundation, siding) for MH siting in other residential districts — pending §151.027 + §151.043 text extraction.
Effect
HUD-code manufactured homes must be allowed on parity with site-built SFD for any Collierville compatibility standard in zones where SFD is permitted.
TN-Greenbeltapplies
Qualifying condition
Collierville FAR (Forest-Agricultural-Residential, §151.048) district exists; residual Greenbelt parcels are likely within FAR-zoned territory and at the city's UGB perimeter. | city_specific_note=Flag at site-selection stage for any FAR-zoned parcel or annexation-reserve land.
Effect
Conversion of Greenbelt-classified land triggers rollback tax (3-year ag/forest, 5-year open space, +interest).
TN-13-7-208-Nonconformingapplies
Qualifying condition
Any lawfully established industrial/commercial use predating a Collierville zoning change. Chapter 151 §§151.130-151.137 (nonconformities) codifies local procedures consistent with state floor. | city_specific_note=Local §§151.130-137 procedural alignment present (confirmed from TOC; substantive text not extracted).
Effect
Pre-existing industrial/commercial uses cannot be terminated by subsequent zoning change absent discontinuance per §13-7-208.
TN-PC1101-Growthapplies
Qualifying condition
Shelby County has an adopted 20-year growth plan (per TACIR Tennessee County Growth Plans registry); Collierville UGB is part of that plan. All 95 TN counties are subject; Shelby County's plan is on file with LGPAC. | city_specific_note=Specific Collierville UGB shapefile / boundary lives in Shelby County clerk and TACIR registries, not in Chapter 151 directly.
Effect
Collierville's annexation territory is bounded by its certified UGB. Future annexations must occur inside the UGB. Planned Growth Area / Rural Area assignments outside the UGB constrain Collierville's expansion options.
Non-applicable laws (1)
TN-ADU-NONEunder_review
Qualifying condition
TN General Assembly bill index 2024-2026: no enacted statewide ADU preemption or by-right mandate. 2026 SB 104 / HB 109 pending but not enacted as of 2026-05-18.
Effect
ADU regulation is fully local to Collierville; no state ceiling or floor.
Adopted building codes
Major cities adopt newer locally
Click a code label to open its state-by-state adoption atlas.
Quirks & notes
- Cloudflare-gated canonical source — codelibrary.amlegal.com/codes/collierville returns HTTP 403 with cf-mitigated:challenge header to all scripted access (curl, WebFetch). Wayback Machine partially caches the chapter TOC (sid 41935 / 41936) but not the dimensional / district detail pages (CDX confirmed no snapshot of sid 0-0-0-43608 for §151.027). Town's own colliervilletn.gov returns Akamai 403; elaws.us mirror returns 503. Partial bypass: MTAS (Tennessee Municipal Technical Advisory Service, https://www.mtas.tennessee.edu/system/files/mrln/mknowledge/reference/) hosts a Collierville reference PDF for §151.006 D General Provisions; extractable text yields confirmed dim-cited content for accessory-structure rules, flagpoles, agricultural livestock, and §151.003 building-height definition. §151.027 base-district bulk-regulations table still requires Playwright stealth, manual PDF acquisition from the Town Hall planning office, or future Wayback backfill of sid 43608.
- Two-tier residential ladder structure (R-1/R-1A, R-2/R-2A, R-3/R-3A) — Collierville uses paired A-suffix tiers within R-1, R-2, and R-3 density bands — six districts spanning what most TN cities cover in three. v1 profile completely omitted R-2A. The A-variants typically have slightly different lot-width / setback rules from the base. — [§§151.036-151.041]
- Separate T (Mobile Home Park) and TN (Traditional Neighborhood) — Collierville has TWO distinct districts at §151.043 (T Mobile Home Park Residential) and §151.049 (TN Traditional Neighborhood). v1 profile conflated them under a single 'T Traditional Neighborhood' entry, which is materially wrong — they are unrelated use categories. — [§151.043 (T); §151.049 (TN)]
- FAR district exists as base zoning, not floor-area-ratio — The acronym 'FAR' in Collierville refers to the Forest-Agricultural-Residential base zoning district (§151.048), NOT to floor area ratio. Be careful of search ambiguity. The actual FAR (floor area ratio) dimensional metric lives in §151.027 if used at all. — [§151.048]
- Design Review Commission with substantive guidelines authority — Collierville has a formal Design Review Commission (§§151.240-250) with binding design guidelines applied to non-exempt projects. Atypical for a TN suburb of ~50k; more common in California or in older New England villages. Triggers an additional procedural layer beyond Planning Commission for many non-residential and PD projects. — [§§151.240-151.250]
- Airport hazard regulations (Charles W. Baker general aviation) — Chapter 151 §§151.285-292 includes airport hazard / approach-surface regulations. Collierville lies near several general-aviation facilities including Charles W. Baker Airport (Millington) and is in the broader Memphis International (MEM) Part 77 vicinity but is well outside MEM's 65 DNL AICUZ. Height limits from FAR Part 77 surfaces apply. — [§§151.285-151.292]
- Comprehensive PD overlay framework — PD (Planned Development) overlay at §§151.150-160 supports residential (§151.156), commercial/industrial (§151.157), mixed-use (§151.158), and seniors-housing (§151.159) sub-types — broader typology than most TN suburbs. PD-approved standards supersede base district controls. — [§§151.150-151.160]
- Public Chapter 1101 UGB bounds annexation — Collierville's Urban Growth Boundary (per 1998 PC 1101) defines the 20-year annexation reserve. Sites in the Shelby County PGA/RA outside Collierville's UGB cannot be annexed; growth-plan amendment via county-municipal coordination committee + LGPAC is the only pathway. — [TCA §6-58-101 et seq.]
Formulas
Definitions
- height
- Building Height (§151.003, confirmed via MTAS mirror): the vertical distance from finished grade to the average distance between the eaves and ridge level for gable, hip, and gambrel roofs, and to the deck level on a mansard roof.
- setbacks
- Distance from property line to building face per §151.027 bulk regulations table (district-by-district table not retrieved — Cloudflare-gated; §151.006 D minimum 5 ft accessory-structure setback confirmed via MTAS mirror).
- lot_coverage
- §151.006 D residential accessory-structure coverage threshold (confirmed via MTAS mirror): combined accessory-structure gross floor area shall be no more than 30% of total gross floor area of principal building on residential lots, with a base allowance of 600 sf regardless of percentage.
- parking
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.
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Max density
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| District | Category | Height | FAR | Coverage | Setbacks | Parking | Density | Min lot | Overlays |
|---|
Sources & references
Research status
Publication gates
| primary url present | passed | https://codelibrary.amlegal.com/codes/collierville/latest/collierv_tn/0-0-0-41935 |
|---|---|---|
| no aggregator cited | passed | scan clean — only amlegal, colliervilletn.gov, elaws.us, web.archive.org, and mtas.tennessee.edu (TN state Municipal Technical Advisory Service — authoritative state-government mirror, not an aggregator) referenced |
| confidence tags full form | passed | Full-form precedent satisfied per atlanta-ga and pomona-ca (FM-8 pattern): all 22 base-district records carry {code, name, category, citation, status, what_is_confirmed, what_is_missing, source_jurisdiction} with no bare/fabricated dimensional values; every under_review dimensional field carries explicit {status:'under_review', qualifying_condition_checked:'§151.027', retrieval_failure_reason:'Cloudflare-gated'} structure. All 6 overlays carry full-form {parameters[], geographic_trigger, status, citation, retrieval_failure_reason}. All 7 state preemptions carry full-form {citation, qualifying_condition_checked, effect, status, city_specific_note}. 2026-05-21 update: 11 confirmed §-cited dimensional values for §151.006 General Provisions (accessory-structure setbacks, heights, lot-coverage thresholds, flagpole heights, agricultural-livestock min lot) and §151.003 building-height definition now positively asserted via MTAS state-government PDF mirror — gate 3 no longer 'vacuous': record carries confirmed dim-cited content alongside structurally-correct under_review markers for §151.027 bulk-regulations table that remains Cloudflare-gated. |
| overlays have parameters trigger confidence | passed | All 6 overlays (H-1, FP, AHO, PD, DRC, SHELBY-CO) have parameters[], geographic_trigger, status, and citation populated |
| preempt section city specific | passed | 7 TN preemption laws applied with city-specific qualifying_condition_checked; TN is not in active-preemption gate-5 list but record is well-populated |
Data quality
52%completeness33 confirmed30 partial
Documented gaps
- §151.027 bulk regulations table — per-district min lot / height / setbacks / lot coverage / FAR / density blocked by Cloudflare and not cached on Wayback (CDX confirmed no snapshot of sid 0-0-0-43608)
- Per-district use tables (§151.021) not extracted
- Parking ratios (§151.117 table) not extracted
- Flood freeboard heights (§151.100) not extracted
- Airport hazard surface elevations (§151.289) not extracted
- Collierville UGB boundary geometry (lives in TACIR / Shelby County registries)
- STR ordinance text (if any) — Chapter 151 TOC scan did not show STR-specific section; Chapter 110 or 117 may govern
Known issues
dimensional-standards-under-review-151-027primary-source-cloudflare-gatedneeds-section-151-027-deepfetch
Verification
| last_verified_at | 2026-05-21T00:00:00Z |
|---|---|
| verifier_specialist | subagent-drain-20260521-tn-collierville-publish |
| verifier_version | 2.0 |
| verification_result | partial |
| atomic_claims_checked | 36 |
| atomic_claims_passed | 34 |
| atomic_claims_failed | 0 |
| atomic_claims_pending | 2 |
| notes | 2026-05-18 pass: Chapter 151 TOC (§§151.001-151.998) extracted from Wayback Machine cache 2025-03-21 of codelibrary.amlegal.com root TOC page; all 22 base-district section assignments (§151.036-077) verified against the TOC. Overlay refs (H-1 §151.195, Floodplain §§151.090-102, Airport §§151.285-292, PD §§151.150-160, DRC §§151.240-250) verified. State preemptions (TN-STR, TN-IZ-BAN, TN-MH-PARITY, TN-Greenbelt, TN-13-7-208, TN-ADU-NONE, TN-PC1101) applied with city-specific qualifying conditions. 2026-05-21 pass: MTAS state-government PDF mirror discovered at https://www.mtas.tennessee.edu/system/files/mrln/mknowledge/reference/Collierville%201501%20Accessory%20Structure%20Requirements.pdf — extractable §151.006 D General Provisions for All Districts content yields 11 confirmed dim-cited values (5 ft min accessory setback, 14 ft / 25 ft accessory heights, 30% / 600 sf accessory FA thresholds, 2 ac livestock min, 30 ft livestock setback, 20 ft / 1-flagpole residential rules, 150 sf architectural compat threshold, 20% industrial accessory cap) plus §151.003 building-height definition (grade-to-average-eaves-ridge measure). Section §151.027 base-district bulk-regulations table still NOT extracted — Wayback CDX confirms no archived snapshot of sid 0-0-0-43608; mtas/colliervilletn.gov/elaws.us provide no alternate mirror; remaining pending claims are the per-district dimensional rows. |
| narrative_ref | narratives/collierville-tn/drain-20260518T072625-tn-01.json |
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