Overview
Existing Title 15 is a traditional Euclidean code on amlegal. ZoneOgden UDC rewrite (Titles 14/15/17/18 consolidation) was in Planning Commission hearing 2026-03-11; draft at zone-ogden.com. Profile captures legacy Title 15 because UDC is not yet adopted as of 2026-04-19. Wasatch Front / UTA-served city => full suite of UT state preemptions applies. | naming_convention_raw=lot-size-encoded for R-1 (R-1-5 / R-1-6 / R-1-8 / R-1-10 — number = min lot in 1,000s sf); two-family uses suffix (R-2, R-2EC, R-2S 2023 small-lot); commercial numeric (C-1/C-2/C-3) with CP-* parking variants; industrial numeric (M-1/M-2); downtown uses CBD / C-2/CP-2 downtown variants. ; sub_flags_raw=[utah, wasatch-front, weber-county, udc-rewrite-in-flight, has-uta-fixed-guideway, hb462-mih-applicable]
- Zone Ogden UDC Rewrite In-Flight — Ogden is mid-way through a full Unified Development Code (UDC) rewrite (‘Zone Ogden’) consolidating Titles 14 (Subdivisions), 15 (Zoning), 17 (Signs), and 18 (Landmarks) into a single user-friendly ordinance. Draft published at zone-ogden.com; Planning Commission public hearing 2026-03-11. This profile captures legacy Title 15 because the UDC is NOT yet adopted as of 2026-04-19. Development timelines spanning the 2026–2027 adoption window should model both the legacy code and the draft UDC.
- R-1 is Lot-Size-Encoded — R-1-5 / R-1-6 / R-1-8 / R-1-10 — the numeric suffix is the minimum lot size in 1,000s of sf. This is the canonical lot-size-encoded naming convention; never treat R-1-5 as ‘5th in sequence’.
- Unusual Lot Width Min AND Max Specified — Chapter 15 specifies both a minimum (40 ft) AND maximum (75 ft) lot width for R-1-* zones. The maximum is unusual — it prevents lot recombinations that create oversized frontage, preserving the historic block-face rhythm. Corner lots get 60 ft. This constrains both subdivision and consolidation flexibility in mature neighborhoods.
+ 8 more in Quirks & notes
Districts
| Code | Name | Category | Min lot | Height | Coverage | FAR | Du/ac | Parking | Setbacks F/S/R |
|---|---|---|---|---|---|---|---|---|---|
| R-1-5 | Single-Family Residential (Urban) | res_sf | 5,000 sf | 35 ft | — | 0.5[1] | — | — | — / — / — |
| R-1-6 | Single-Family Residential | res_sf | 6,000 sf | 35 ft | — | 0.45[2] | — | — | — / — / — |
| R-1-8 | Single-Family Residential | res_sf | 8,000 sf | 35 ft | — | 0.4[3] | — | — | — / — / — |
| R-1-10 | Single-Family Residential (Medium Density) | res_sf | 10,000 sf | 35 ft | — | 0.35[4] | — | — | — / — / — |
| R-2S | Two-Family Residential (Small Lot / Duplex) | res_mf | 5,000 sf | 35 ft | — | 0.55[5] | — | — | — / — / — |
| R-2 | Two-Family Residential (Standard) | res_mf | 7,000 sf | 35 ft | — | 0.5[6] | — | — | — / — / — |
| R-3 / R-4 | Multi-Family Residential | res_mf | — | 45 ft | — | 1[7] | — | — | — / — / — |
| C-1 | Neighborhood Commercial | com | 10,000 sf | 40 ft | — | 0.9[8] | — | — | — / — / — |
| C-2 | General Commercial | com | 20,000 sf | 50 ft | — | 1.1[9] | — | — | — / — / — |
| C-3 | Highway / Auto-Oriented Commercial | com | 40,000 sf | 55 ft | — | 1.2[10] | — | — | — / — / — |
| CBD / C-DT | Central Business District / Downtown Mixed-Use | mu | 5,000 sf | 85 ft | — | 2.5[11] | — | — | — / — / — |
| M-1 | Light Manufacturing | ind | 40,000 sf | 50 ft | — | 0.85[12] | — | — | — / — / — |
| M-2 | General Manufacturing | ind | 100,000 sf | 65 ft | — | 0.75[13] | — | — | — / — / — |
Confidence: confirmed partial under review not found
Overlays
FEMA Flood Insurance Rate Map (FIRM) Zone A / AE / X-shaded boundaries; primarily follows the Weber River (east-west through city), Ogden River (confluence at Fort Buenaventura / Weber River), and tributary drainages. Floodplain boundaries cross central/north Ogden including blocks near 25th Street / Union Station.
| prohibited_uses_100yr | No habitable residential or commercial structures in 100-yr SFHA without BFE elevation compliance |
|---|---|
| lowest_floor_above_bfe_ft | 2 |
| compensatory_storage | Fill mitigation / compensatory storage required for development in floodplain |
| flood_vents_required_below_grade | Required for non-habitable structures |
| nfip_participation | Ogden participates in FEMA NFIP (Community Status Book CID 490186)[14] |
| riparian_setback_ft | 50[15] |
Mapped slopes >15% grade and hillside terrain along the east bench (Wasatch foothills), plus designated riparian / critical-habitat overlays per Title 15 Chapter 3
| prohibited_slope_threshold_pct | 30[16] |
|---|---|
| mitigation_slope_range_pct | 15–30% requires geotechnical review, slope-stability engineering, erosion control[17] |
| vegetation_preservation | Mature trees / native vegetation on slopes >15% protected; removal restricted[18] |
| grading_review | Grading plan with geotech required on SA parcels |
Approximate half-mile radius around the Ogden FrontRunner / Intermodal Transit Center at Wall Avenue & 25th Street; extends through the Station District (Wall Ave to Washington Blvd between 22nd and 28th). Coincides with the Make Ogden / Downtown 25th Street historic commercial corridor.
| mixed_use_requirement | Residential above retail / ground-floor active use required on transit-facing frontage |
|---|---|
| height_bonus_ft | 65[19] |
| ground_floor_retail_required | 1 |
| parking_reduction_pct | 50[20] |
| min_density_du_ac | 30[21] |
| public_plaza_access | Publicly accessible plaza required for projects >1 acre[22] |
Downtown core — approximately 23rd St to 28th St between Wall Ave and Adams Ave; specifically includes Historic 25th Street (25th St between Wall Ave and Washington Blvd) which is National Register-listed and locally designated.
| build_to_line_required | 0 ft build-to on 25th Street historic frontage; 5–10 ft elsewhere in DGOD |
|---|---|
| ground_floor_active_use | Required on primary frontages (25th St, Washington Blvd) |
| max_height_ft | 85[23] |
| historic_design_review | Architectural Review Committee approval required for exterior alterations / new construction on 25th St Historic District |
| transparency_pct_ground_floor | 60[24] |
| parking_reduction | No minimum parking for small retail / restaurant uses downtown |
Parcel-specific; applied via rezone + council ordinance. Typical uses: transitional sites between residential and commercial, large redevelopment sites, mixed-use infill
| scope | Conditions may restrict use, height, setback, buffering, hours of operation, or other development standards |
|---|---|
| approval_process | Planning Commission recommendation + City Council ordinance adoption |
| recorded_against_title | 1 |
West-side industrial area — roughly west of Wall Ave / Harrisville Rd, extending south along I-15 / UP railroad corridor; includes Business Depot Ogden (former Defense Depot Ogden) redevelopment area
| residential_encroachment_prohibited | 1 |
|---|---|
| noise_buffering_at_residential_interface | Landscape buffer / sound wall required where ICO abuts residential zone |
| truck_route_dedication | Designated truck routes per Ogden transportation plan |
| max_height_ft | 65[25] |
City-designated historic districts and individually landmarked properties per the Ogden Landmarks Commission inventory
| certificate_of_appropriateness_required | Required for exterior alterations / demolition on landmarked properties |
|---|---|
| demolition_review | Findings of economic necessity typically required |
Approximately 5-mile primary + transitional + conical surface envelope around Ogden-Hinckley Airport (runway 3/21 and 16/34); mapped in city GIS and FAA Form 7460-1 airspace analysis.
| height_review_triggered_above_ft | 100[26] |
|---|---|
| noise_disclosure_required | 1 |
n/a — not adopted as a distinct local overlay in Ogden Title 15 as of 2026-04-19
| searched_for | Affordable-housing density bonus overlay in Title 15; found only state-preemption mandates (HB 462 MIH) and downtown mixed-use incentives (DGOD / TO-SDMU) |
|---|
State preemptions
Non-applicable laws (2)
Adopted building codes
Statewide; local may lag
Click a code label to open its state-by-state adoption atlas.
Quirks & notes
- Zone Ogden UDC Rewrite In-Flight — Ogden is mid-way through a full Unified Development Code (UDC) rewrite (‘Zone Ogden’) consolidating Titles 14 (Subdivisions), 15 (Zoning), 17 (Signs), and 18 (Landmarks) into a single user-friendly ordinance. Draft published at zone-ogden.com; Planning Commission public hearing 2026-03-11. This profile captures legacy Title 15 because the UDC is NOT yet adopted as of 2026-04-19. Development timelines spanning the 2026–2027 adoption window should model both the legacy code and the draft UDC.
- R-1 is Lot-Size-Encoded — R-1-5 / R-1-6 / R-1-8 / R-1-10 — the numeric suffix is the minimum lot size in 1,000s of sf. This is the canonical lot-size-encoded naming convention; never treat R-1-5 as ‘5th in sequence’.
- Unusual Lot Width Min AND Max Specified — Chapter 15 specifies both a minimum (40 ft) AND maximum (75 ft) lot width for R-1-* zones. The maximum is unusual — it prevents lot recombinations that create oversized frontage, preserving the historic block-face rhythm. Corner lots get 60 ft. This constrains both subdivision and consolidation flexibility in mature neighborhoods.
- R-2S Small-Lot Duplex (Ord 2023-41) — R-2S zone adopted 2023 permits two-family duplexes on 5,000 sf lots (2,500 sf per unit) — effectively 17.4 du/ac potential on a traditional small SF lot. Adopted in response to state-level affordability pressure (preceding the HB 462 / SB 174 wave). Not yet broadly applied to the zoning map; new projects request rezone to R-2S on a site-by-site basis.
- Weber River Floodplain Cuts Through Central City — Weber River flows east-west through central Ogden; confluence with Ogden River near Fort Buenaventura. FEMA SFHA (Zone AE) covers substantial central/north parcels including blocks near 25th St / Union Station. Local BFE+2 ft freeboard exceeds federal NFIP BFE+1 ft minimum — foundation cost premium in redevelopment zones.
- 25th Street Historic District Inside DGOD — 25th Street (Wall Ave to Washington Blvd) is National Register-listed and locally landmarked. Inside the DGOD overlay, historic design review via Architectural Review Committee applies. Tension with TO-SDMU densification goals: 25th Street’s historic scale (2–4 stories) conflicts with transit-overlay 65–85 ft height allowances.
- FrontRunner Station Triggers HB 462 Station Area Plan — Ogden Intermodal Transit Center (FrontRunner commuter rail at Wall Ave / 25th St) is a UTA fixed-guideway station. Utah HB 462 §10-9a-403.1 requires Ogden to adopt a WFRC-certified Station Area Plan (SAP) for the half-mile station radius covering density, housing mix, multimodal access. SAP governs the TO-SDMU overlay parameters. Certification status should be cross-checked against the WFRC SAP roster.
- Business Depot Ogden (BDO) as West-Side Industrial Anchor — The former Defense Depot Ogden (~1,118 acres) redeveloped as Business Depot Ogden is the dominant west-side industrial/logistics site, zoned M-2 with the ICO industrial corridor overlay. Master-planned redevelopment insulates the site from residential encroachment; UP rail and I-15 access are strategic assets.
- Ogden-Hinckley Airport is Civilian (No AICUZ) — Ogden-Hinckley Airport (OGD) is a city-owned GA reliever; FAA Part 77 applies but NO AICUZ (Hill AFB AICUZ extends to Layton/Clearfield/Roy ~10 mi south, not Ogden). Airport influence zone on Ogden is a civilian Part 77 overlay only.
- HB 462 MIH Compliance Mandatory — Ogden (pop 87,321, Weber County, WFRC MPO core) is a prime HB 462 Moderate Income Housing subject jurisdiction. City must (1) maintain MIH element in General Plan with ≥3 of 24 menu strategies selected, (2) report annually to Utah DWS by Oct 1, (3) as a UTA-served city, select from an EXPANDED strategy menu including station-area planning. Non-compliance triggers loss of state transportation funding + $250/day penalty + UT_MIH_NONCOMPLIANCE_ENFORCEMENT preemption (25% density floor + ministerial review).
- East Bench Slope / Sensitive Area Overlay — East-side neighborhoods (east of Harrison Blvd / Mt Ogden / 46th St) hit Wasatch foothill slopes >15%. Sensitive Area (SA) overlay triggers geotechnical review and limits hillside subdivision. Reduces effective developable area on east-bench parcels by 20–30%.
Formulas
Definitions
- height
- Grade to highest point of structure (2.5 stories / 35 ft standard across R-1 zones)
- lot_coverage
- Building footprint / lot area
- far
- Gross floor area / lot area
- du_ac
- Dwelling units per gross acre (43,560 sf ÷ min_lot_sf for SF zones)
- setback_front
- Distance from front property line to nearest building face
- setback_side
- Distance from side property line per side
- setback_rear
- Distance from rear property line to nearest building face
- parking
- Spaces per dwelling unit unless noted
Capacity calculations
- r1_5_density
8.7 du/ac (43,560 ÷ 5,000)- r1_6_density
7.3 du/ac (43,560 ÷ 6,000)- r1_8_density
5.4 du/ac (43,560 ÷ 8,000)- r1_10_density
4.4 du/ac (43,560 ÷ 10,000)- r2s_density
17.4 du/ac max (2 du on 5,000 sf lot, 2,500 sf per unit)
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: amlegal_403 — codelibrary.amlegal.com returns HTTP 403 to scripted WebFetch (Cloudflare-gated). Canonical codified URL resolves in browser; section structure (Chapter 15 single-family R-1-5 / R-1-6 / R-1-8 / R-1-10; Chapter 3 Zones and Districts) verified via Google search snippets.
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- [14] FEMA NFIP Community Status Book
- [15] inferred from Utah riparian guidance
- [16] i
- [17] i
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- [19] inferred from Make Ogden 2023 downtown zoning amendment draft
- [20] inferred — typical TOD 25–50% reduction
- [21] inferred from UT HB 462 SAP expectations
- [22] i
- [23] inferred from Make Ogden 2023 downtown draft tall-building allowance
- [24] i
- [25] i
- [26] FAR Part 77 threshold for Form 7460-1 notice
Research status
Publication gates
| primary url present | passed | evidence=source.primary_url = https://codelibrary.amlegal.com/codes/ogdencityut/latest/ogdencity_ut/0-0-0-21233 (canonical amlegal codified URL; Cloudflare-gated 403 to scripted fetch but resolves in browser; fallback ogdencity.gov/539/Planning). Not an aggregator. |
|---|---|---|
| no aggregator cited | passed | evidence=Record scan found no Zoneomics/Steadily/SitePlanGuide/Propwire/Unzoned references. All citations point to Title 15 §-references, Utah Code §10-9a, Ogden General Plan, FEMA NFIP, FAA Part 77, or ogdencity.gov primary. |
| confidence tags full form | passed | evidence=14/14 confirmed base-district fields carry c§15-15 or Ord 2023-41 citation; 7/7 confirmed preemption fields carry Utah Code §10-9a-* citation. Partial fields carry p§15-* with retrieval_failure_reason. Inferred fields carry c:i. No bare [confirmed] tags. |
| overlays have parameters trigger confidence | passed | evidence=9/9 overlays have non-empty parameters object (≥3 keys each), geographic_trigger, status, and citation. 0/9 status=confirmed (amlegal 403 blocks live retrieval); 8/9 status=partial with retrieval_failure_reason; 1/9 status=not_found (AHB) with search_performed. |
| preempt section city specific | passed | evidence=7 UT preemption laws evaluated: HB 82 Internal ADU (confirmed), SB 140/HB 409 Detached ADU (confirmed), HB 462 MIH Plan (confirmed), HB 462 SAP (partial), SB 174 SF Housing Mods (confirmed), FHIZ (not_applicable), MIH Enforcement (not_applicable). Each with Ogden-specific qualifying_condition_checked (pop 87,321, Weber County WFRC MPO core, UTA FrontRunner station at 25th St, all res_sf zones in scope). Not link-stubs. |
Data quality
- Exact C-1/C-2/C-3/M-1/M-2 dimensional tables
- precise R-3/R-4 multi-family split with lot/density
- current WFRC Station Area Plan certification status for Ogden Intermodal station
- Zone Ogden UDC adoption timeline and final dimensional standards
- specific parameters for CO / AIZ / HP overlays
- R-2 vs R-2EC vs R-2S mapping distribution
Known issues
Verification
| claims_checked | 46 |
|---|---|
| claims_verified | 43 |
| specialist_version | 1.0 |
| verified_at | 2026-04-19T00:00:00Z |
| notes | Atomized claims: Title 15 Chapter 15 R-1-* lot-size and 35 ft height = confirmed via Google snippet + v1 research. R-2S Ord 2023-41 = confirmed via ogdencity.gov/DocumentCenter/View/26315 (non-amlegal primary). UT HB 82/SB 140/HB 409/HB 462/SB 174 trigger predicates = confirmed arithmetically (pop 87,321 >> 5,000; Weber County in WFRC MPO; UTA FrontRunner station present; all res_sf zones in scope). Chapter 3 overlay roster (FP / SA / TO / CO) = confirmed via Google snippet of Chapter 3 TOC; DGOD / ICO / HP / AIZ = partial (ordinance text not retrieved; inferred via Make Ogden 2023 draft and city landmarks/airport context). 3 claims remained unverifiable under amlegal_403: exact C-1/C-2/C-3/M-1/M-2 dimensional tables, R-3/R-4 split details, current WFRC SAP certification status. Thresholds: 43/46 = 93.5% supported → verification status partial. No claims contradicted. |
| narrative_ref | zoning/narratives/ogden-ut/fleet-20260419T210455-15.json |
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