Lighting design for new construction and remodels in Austin is governed by one of the nation’s most robust dark sky ordinances. City code amendments to IRC/IBC, zoning compatibility overlays, energy standards, and specialized outdoor lighting criteria converge in a condensed, technical set of permit expectations for single-family, townhome, and low-density multifamily construction. To demonstrate compliance on residential permit drawings, plansets must document fully shielded fixture specifications, layout and dimension for glare and trespass mitigation, comprehensive site zoning analysis, automatic lighting control integration, and address typical Austin Build + Connect (AB+C) review redlines with code-cited revisions.

Fixture Specification and Schedule Documentation for Austin's Dark Sky Outdoor Lighting Ordinance Compliance

Austin Code Basis, IRC/IBC Integration, and Local Mandate

The City of Austin has adopted the 2024 IRC and IBC with local amendments (effective July 10, 2025; see Building Technical Codes), but where exterior lighting is concerned, permit reviewers use local standards and the Land Development Code (Title 25) as the controlling authority. The Building Criteria Manual (BCM) Section 5.2.10-specifically governs the design, configuration, performance, and documentation of all outdoor luminaires for compliance with dark sky requirements. The code and review culture require “fixture-level” documentation, not just generic symbols and schedules.

Full-Cutoff and Shielding Designations on Plan Sheets

Austin’s Land Development Code and BCM 5.2.10(B) specify that all outdoor fixtures must be “fully shielded” or “full-cutoff”-meaning the luminous element is not visible above the 90-degree (horizontal) plane, and zero lumens emit skyward. In practice, permit plans must:

  • Identify each exterior luminaire-porch, entry, eave, sconce, bollard, post light-by type on the site and electrical plan.
  • Use symbols and codes cross-referenced to a fixture schedule.
  • Include cut sheet or elevation detail proving the opaque housing completely shields the lens/lamp. Generic “wall light” callouts are routinely redlined; only named models with cut sheets indicating “zero Uplight (BUG rating)” pass review.
  • Notate in the schedule: “FULLY SHIELDED. No fixture element extends below housing. Lumens above 90º = 0.”
From BCM Sec. 5.2.10(C)(2): “…fully shielded fixture means any outdoor light fixture constructed so that all of the light emitted by the fixture, either directly from the lamp or a diffusing element, or indirectly by reflection or refraction from any part of the luminaire, is projected below the horizontal…"

Correlated Color Temperature (CCT) Documentation

Per City enforcement, all exterior luminaires must have a maximum CCT of 3000 Kelvin-ensuring warm, amber light and minimizing blue-rich output that amplifies skyglow. The “CCT not to exceed 3000K” note is required for each fixture in the permit schedule and is a standard reviewer comment (Austin Sign Co-Dark Sky Compliant Lighting; confirmed in redlines from AB+C). For example:

  • “A1.12-Exterior Lighting Schedule: All wall sconces Model ELS-3108, 3000K LED, fully shielded, 970 lumens, finish: Dark Bronze. CCT = 3000K. Confirmed by all manufacturer submittals attached.”
Plans omitting the 3000K CCT maximum are routinely kicked back by review, and cut sheets showing any higher Kelvin value (e.g., 3500K “cool white”) are required to be replaced.

Lumen Limitations-Output and Fixture Type

Output restrictions are stringent: no single outdoor luminaire may exceed 1800 lumens on residential parcels (TxDOT Lighting Manual). The schedule must capture actual initial lumens per fixture from manufacturer cut sheets-wattage alone is not acceptable. Common mistakes include using commercial wall packs or over-lamped fixtures, both rejected at plan review.

Detailed Fixture Schedule and Drawing Sheet Integration

Electrical or lighting plans in Austin must anchor exterior lighting compliance with a coordinated symbol legend, fixture schedule, and documentation package. Requirements include:

  • Schedule Table: Fixture symbol, manufacturer/model, CCT (max 3000K), initial lumens/output, mounting height, shield type/material, listing/certification, brief note “fully shielded, zero up-light.”
  • Plan Sheet Call-outs: Locate and key all exterior fixtures with codes matching schedule; indicate “FS” (fully shielded), CCT value, and lumens on annotation. Key to full cut-sheet PDFs for each product type-plan reviewers may require attached product cut sheets showing U/D/G (Bug) rating and wattage.
  • Elevation Details: Side and front elevations showing fixture placement, physical profile, and shielding (e.g., “Top of Shield Elev +7'-0“ AFF-Fixture face flush to wall, lamp/lens sits above shielded housing line.”)
Lack of fixture model numbers, missing CCT data, or generic “LED wall pack” labels elicit reviewer comments such as: “Please provide full manufacturer details for all exterior luminaires with cut sheet demonstrating full shielding and 3000K or lower color temperature for each fixture.”

Dimensioning, Ratings, and Materials

Schedules and details must show:

  • Mounting height above finished grade (AFF): Numeric value for each fixture, e.g., “mounted at 8’-0” AFF.”
  • Luminaire CCT, Efficacy, and Output: “EL-1: Lithonia DSXW1 LED 3000K, 15W, 1500 lumens, 8’-0” AFF, full cutoff, dark bronze, IP65, DLC listed, attached cut sheet.”
  • Shield material: “Powder-coated aluminum hood; clear glass lens.” Shielding element must be opaque.
Any missing, ambiguous, or incomplete fixture data will stop the review process with a formal redline requiring revision and resubmittal.

Exterior Lighting Layout and Dimensioning for Light Trespass and Glare Mitigation

Mounting Heights Relative to Finished Grade & Shielding Implications

The Building Criteria Manual Section 5.2.10 specifies height and shield parameters:

  • Any “bollard, step light, or path light” mounted below 36" above grade and delivering <1800 initial lumens is “fully shielded” if the enclosure blocks direct lamp view.
  • Wall, eave, and sconce fixtures with horizontal output must be called out with the exact height above finished floor or grade (AFF)-not to exceed the mounting height indicated by the manufacturer’s shielding performance.
On plan sheets, each exterior elevation must show fixture mounting height with a coded callout-e.g., “Wall Sconce EL-2, 3000K, 950 lumens, mounted 6’-10” AFF-see Detail 9/A6.21 for shielded profile.”

Setbacks and Site Layout for Glare and Trespass Control

While Austin code does not prescribe explicit luminaire setbacks on single-lot residential sites, lighting zone overlays and compatibility standards require that fixtures be sited to avoid glare onto adjacent properties. From LDC Sec. 25-2-1067: “Exterior lighting must be hooded or shielded so that the light source is not directly visible from adjacent properties in SF-5 or more restrictive districts…” (Austin LDC).

  • For multifamily (MF) or lots adjacent to public right-of-way, maximum site perimeter light level is 0.5 fc (foot-candles), measured vertically at the property line.
  • Plans must annotate setback distances (e.g., “All pole top lights min. 10’ from property line”) if used.
In AB+C redlines, reviewers often comment: “Clarify setback from property boundary for all fixtures facing residential adjacency. Provide photometric contours at property lines with max 0.5 fc.”

Aiming Angles, Cutoff, and Shielding on Drawings

Directional and flood fixtures must be called out with explicit aiming diagrams: plan views showing light distribution wedge, elevation notations noting “fixture aimed max 30° below horizontal,” and a cross-reference to shield detail sections.

  • Labeling for each fixture: “Aimed 90° down,” “No light emitted above horizontal, per cut sheet/BUG rating.”
  • Standard note: “All fixtures equipped with integral glare shield per manufacturer detail.”
Callout details (detail bubbles) on both plan and elevation sheets must refer to enlarged “Fixture Shield Section” showing internal shield and aiming mechanism. Typical detail annotation: “See Detail 10/A8.12: Fixture mounted at 7’-4” AFF, integral metal baffle blocks view of lamp above 90°. Confirmed field shield adjustment indicated on Fixture Installation Schedule.”

Plan Sheet Conventions and Required Notes

Site and lighting plans must feature:

  • Symbols-State fixture type (EL-1, EL-2, etc.) in legend; shading or fill style can indicate shielded status.
  • Mounting Callouts-“Mounted 34” AFF(typ pathlight), shielded bollard, see cut sheet C-4.”
  • Section Details-Keyed section cuts indicating shield geometry or louver spacing.
  • Standard Compliance Notes-“All exterior fixtures fully shielded per City of Austin BCM Sec. 5.2.10. No light above horizontal.”
Insufficient or generic symbols (“L1: Path Light”) are redlined with “clarify fixture shielding, mounting height, and aiming angle in both plan and elevation views.”

Site Lighting Zoning, Adjacent Impact Analysis, and Comprehensive Luminaire Schedule Integration

Zoning District Compatibility-SF-2, SF-3, MF-1, and More

Austin’s zoning districts impose additional constraints on outdoor lighting, especially where new or modified lighting abuts less intensive use categories:

  • SF-2, SF-3 (Single-Family): Require that lighting is non-intrusive, fully shielded, and no direct lamp view permitted from abutting lots. (LDC Sec. 25-2-1067)
  • MF-1/MF-2, SF-5, LR, etc. (Multifamily, Limited Office): Compatibility overlays may further require perimeter illumination not to exceed 0.5 fc and shielded fixtures not visible to adjacent single-family lots.
Permit plans that include more than one zoning district or abut rights-of-way must include a lighting compatibility analysis keyed to the zoning map.

Site Photometric Plans-Property Line Intensity Mitigation

A comprehensive photometric (light level) plan is now mandatory for any residential project with more than basic sconces. Requirements:

  • Photometric contour plan (“iso-footcandle map”): Color or grayscale gradients at 0.5 fc, 1.0 fc, etc. with property line clearly marked.
  • Annotation of each measurement point: “At north property line, EL-8, reading <0.5 fc.”
  • Reference to lighting schedule, showing model/angle/output for each point.
Reviewers often cite: “Provide a photometric plan demonstrating illumination at each property boundary does not exceed 0.5 fc. Show fixture locations, aiming, and output matching schedule.”

Comprehensive Luminaire Schedule-Cross Referencing and Integration

Drawing sets must include a lighting schedule with:

  • Fixture symbol/code (EL-1, etc.) matching plan and legend.
  • Manufacturer/model, CCT, initial lumens, mounting height, shield type.
  • BUG (Backlight-Uplight-Glare) rating-noting “U=0” for all fixtures.
Cross referencing is critical. Each scheduled fixture is keyed to a location on the site plan, with the schedule referenced in elevation and section call-outs. Permitting staff will “spot check”-e.g., verify that a fixture shown as “EL-2” wall sconce at 7’-0” AFF on the architectural elevation matches both the electrical plan device location and the photometric intensity at that point.

Site Plan Sheet Requirements and Detail Integration

Integrated site lighting plans include:

  • Site Plan (1”:20’ or 1”:10’): All exterior lighting locations with perimeter property lines, adjacent zoning callouts, and rights-of-way labeled.
  • Fixture Schedule: Table with all critical specs (symbol, location, shield, CCT, lumens, etc.).
  • Lighting Details: Typical installation details for wall, path, bollard, pole (if present) with specific dimension and shield call-out.
  • Photometric Overlay: Layer showing light distribution at ground level/isocontour, keyed to each fixture location.
Reviewers regularly detail redlines: “Provide a comprehensive schedule listing all proposed and existing luminaires. Ensure all exterior fixtures on the site plan are referenced in the schedule and corresponding cut sheets are provided. Add property line light level verification.”

Automatic Lighting Control Strategies and Electrical Note Requirements

Control Device Documentation on Permit Plans

The 2024 IRC Sec. N1104.3 (R404.3) (adopted locally, see ICC), requires:

  • All permanently installed exterior lighting >30W to be controlled by one or more of: manual switch, automatic shutoff, photocell, motion sensor.
  • Any automatic control must “permit the shutoff when daylight is present” and allow override that reverts within 24 hours.
Austin’s dark sky amendments further require curfew dimming-lights must dim by at least 30% or turn off between midnight and one hour pre-dawn-documented with device callouts, not just general notes.

Electrical Plans-Symbols, Control Callouts, and Narrative

Each electrical plan must feature:

  • Symbols for Control Devices: Unique plan symbols for timer, motion sensor, photocell, and dimmer. Include legend keyed on cover or electrical legend sheet (e.g., “MC” = motion control, “PC” = photocell, “TM” = timer, etc.).
  • Fixture Label on Plan: “EL-4 (FS) 800 lm, 3000K, 8’-0” AFF, MC+TM (motion, timer).”
A common redline from Development Services electrical review is: “Please provide control type and operation for each exterior fixture-specify if photocell, timer, dimmer, or motion sensor installed. Indicate on plans, not just general notes.”

Code-Cited Operational Parameters

Automatic lighting controls must follow these operational parameters, as detailed on drawing notes and specifications:

  • Timers: Document schedule (e.g., “Timer set 7pm-12am, off thereafter”).
  • Motion Sensors: Time delay short (max 15 min), written as “fixture remains on for max 15 minutes.”
  • Photocells: Call out mounting location (“east façade, 10’ from eave”) and orientation to avoid stray light.
  • Dimmers: Note programmed dimming-“After 12:00am, output automatically reduced by 30% minimum per Austin Curfew Standard.”

On schedules and notes, call out: “Exterior lighting is controlled via [device types], programmed to comply with curfew reduction (output reduced >30% or off after midnight) per City of Austin dark sky regulations and IRC Sec N1104.3.” Any generic “all fixtures on switch” arrangement will be redlined.

Notes and Section Details for Permit Approval

General and sheet-specific notes must reinforce:

  • All controls NRTL listed and outdoor-rated.
  • Override settings automatically revert within 24 hours (N1104.3.1.1).
  • All sensors, timers, and controls included in device and circuit schedules, not shown as “by others.”
A typical reviewer comment: “Clarify exterior lighting control strategies to meet IRC Sec. N1104.3 and local curfew/dark sky requirements. Provide narrative of operations and list all control devices on electrical sheets.”

Addressing Austin Build + Connect (AB+C) Plan Review Comments for Dark Sky Violations

City Code and Typical Redlines-Chapter 25-2, Subchapter C, Article 10

The core regulatory basis for plan review is:

Commonly cited code issues on residential plan reviews:

  • CCT Exceeding 3000K:
    • Plan review comment: “Proposed exterior fixtures (e.g., EL-1, EL-4) specified at 4000K, not permitted-update cut sheets to demonstrate CCT ≤ 3000K.”
    • Required fix: Substitute with 2700K or 3000K product, revise schedules, and attach compliant cut sheets.
  • Unshielded or Partially Shielded Fixtures:
    • “Wall sconce as shown does not meet fully shielded definition-add shield detail or substitute product, provide cut sheet and section.”
    • Plan reviewer asks for drawing-section details to demonstrate no lamp/lens visible above horizontal from adjacent lot or ROW.
  • Excessive Light Trespass:
    • “Photometric plan shows 0.8 fc at east property boundary (limit 0.5 fc)-provide fixture shielding, re-aim, or reduce output as needed.”
    • Attach revised photometric pdf, update schedule, add shielding annotation.

Drawing and Narrative Revision Protocol

Standard resubmittal process after redlines:

  • Fixture schedule updates: Swap out all non-compliant CCT fixtures, highlight changes in narrative (“All exterior fixtures now specified at ≤3000K CCT. See updated schedule.”).
  • Add or update shield details: Drawings showing cross-section/elevation at all non-compliant fixture locations, indicate line of sight blocked at 90º plane. Typical notation: “Lamp/lens concealed above horizontal line as shown in Detail 6/A8.21 (attached).”
  • Revised photometric plan: Attach new map, annotate max at all property lines. “Per BC reviewer, verified all site perimeters now ≤0.5 fc.”
  • Attach product cut sheets for each fixture referenced, with CCT, lumen, and shielding highlighted-reviewers often request PDFs, especially for unfamiliar models.
All revision packages require a narrative response on applicant letterhead, serially addressing each review comment or redline (“Response to AB+C Review Cycle 2-Sheet E-2 revised, all EL-3 wall packs now CCT=3000K, fully shielded…photometric plan attached with compliance contours…”).

Required Permit Submittal Sheet Structure and Core Elements

A code-compliant dark sky documentation on residential submittals is anchored by four plan-sheet components:

  • Fixture Schedule Table: Full details: model, CCT, lumens, mounting height, shielded status/material-lined up with symbols on plan/elevation.
  • Fixture Elevation/Section Details: Each fixture mounting condition and shield, line of sight at 90°, relation to grade, cross-referenced from plan symbols.
  • Photometric Site Plan Overlay: fc contour lines at 0.5 increments, property boundaries labeled, fixture locations keyed with symbol.
  • General and Electrical Notes: Control schedule, shutoff parameters (“all exterior fixtures to be off or dimmed >30% from midnight-dawn”), NRTL listing, and code references.
    • Standard note: “All work to comply with City of Austin Land Development Code Ch25-2, Art. 10, BCM Sec 5.2.10, IRC N1104.3, and local amendments in effect at time of permit submittal.”

Failure to provide all of the above in the initial submittal is guaranteed to extend the AB+C plan review cycle. Every revision should “trace” the reviewer’s comments back to a specific code section and clearly show on updated sheets where compliance is now demonstrated.

Conclusion

Austin’s Dark Sky Outdoor Lighting standards are not merely advisory-they dictate a rigorous set of fixture, control, photometric, and documentation requirements enforced at plan review. Successful residential permit sets tightly integrate full-cutoff fixture schedules, CCT and output restrictions, detailed site layouts, automatic control strategies, zoning impact overlays, and preemptively address AB+C reviewer redlines on every sheet. For projects in districts from SF-2 to MF-1 and sites along any public way, compliance must be demonstrated with granular, code-cited, and drawing-referenced documentation. Every detail matters in a city protecting both its night skies and its livability.

Meticulous dark sky drafting, from sheet callouts to cut sheets and compatibility overlays, is a hallmark of Kingsway Drafting & Design.