What Title-24 actually is
Title-24 of the California Code of Regulations sets the energy efficiency standards for buildings. Part 6 (Energy) is what most commercial TIs touch: lighting power density, lighting controls, mechanical efficiency, envelope insulation, and water heating. The 2022 cycle, in effect for permits after July 2024, tightened requirements significantly.
The non-residential section is what commercial spaces follow. Lighting is the most common compliance touchpoint, but envelope and HVAC come in on bigger TIs.
Lighting power density: the line everyone trips over
The 2022 code dropped allowable lighting power density (LPD) in most non-residential occupancies by 15–25% versus the prior cycle. An office TI is now capped around 0.65 watts per square foot, retail around 0.85, restaurants around 0.95, depending on the specific subcategory. Old fluorescent or early-LED designs that used to comply now don't.
What this means in practice: every TI has to be redesigned for LED with active controls. Recessed cans get replaced with high-efficacy LED downlights, linear fluorescent gets replaced with LED tube or strip, and pendants over conference tables get re-specified for lumen output rather than watt budget. Skipping this redesign on a buildout-as-existing-was project is the most common reason permits stall.
Lighting controls in 2026
Controls are no longer optional. Every space type has minimum requirements, and most office and retail TIs need all of the following:
- Occupancy sensors: In every room with controlled lighting. Restrooms, corner offices, conference rooms, storage. Must turn lights off within 20 minutes of vacancy.
- Daylight harvesting: Fixtures within 15 feet of windows must dim automatically based on natural light. This is the one most retrofits miss; the wiring topology matters.
- Multi-level switching or continuous dimming: Manual control beyond simple on/off. Either two-level switching (50% and 100%) or continuous dimming through a wall station or app.
- Time-of-day scheduling: For spaces with regular operating hours. After-hours sweep-off, with a local override that grants 2 hours of light before resetting.
- Demand response: The building has to be able to receive a signal from PG&E and reduce lighting load by 15% on demand-response events. Most modern lighting control systems handle this; legacy systems do not.
NRCC paperwork
Non-Residential Compliance Certificates (NRCC forms) document the design intent. They get filled out by the design team or contractor, signed by a CEA (Certified Energy Analyst) for projects over a threshold, and submitted with permit drawings. The relevant forms for a typical TI: NRCC-LTI-E (lighting indoor), NRCC-LTI-O (lighting controls), and NRCC-MCH for mechanical changes.
Skip a form, get redlined. Plan check will flag missing NRCC forms before they review anything else.
NRCA acceptance testing
This is the part that catches projects at final. Non-Residential Compliance Acceptance (NRCA) testing verifies that the installed system actually performs to the design. For lighting, this means a CALCTP-certified technician confirms the controls work: occupancy sensors trigger, daylight sensors dim, time-of-day schedules execute.
NRCA tests are scheduled at substantial completion, paperwork is filed before final inspection, and the certified technician signs off. Skip the test, fail the final. We schedule NRCA at the start of the punch phase to keep the timeline.
The acceptance tests required on most commercial TIs
Specific NRCA tests required on most commercial buildouts:
- NRCA-LTI-02-A: Occupancy sensor functional test — verify every sensor turns lights off within the prescribed time.
- NRCA-LTI-03-A: Automatic daylight controls — verify dimming response in the daylit zone with calibrated light meter.
- NRCA-LTI-04-A: Automatic time-switch controls — verify schedule logic, override timing, and holiday programming.
- NRCA-LTI-05-A: Multi-level lighting controls — verify wall stations produce the required light levels.
- NRCA-MCH-02-A (if HVAC changed): Outdoor air control — verify economizer and minimum OA dampers operate.
Each test is documented with field measurements, signed by the technician, and submitted before final inspection. Two days of on-site work for a typical 4,000 sqft office TI. We coordinate the technician three weeks ahead of substantial completion to lock the date.
HVAC and envelope, when they apply
Most cosmetic TIs (paint, carpet, partition walls only) don't trigger HVAC or envelope compliance. But three triggers we see often:
- Adding or moving HVAC zones: Even a single new VAV box can trigger an MCH form and a duct leakage test for that zone.
- Adding rooftop units or condensers: Always triggers efficiency requirements (SEER2/IEER ratings) and a refrigerant management plan.
- Touching the envelope: New roof, new window, new exterior door changes the envelope. Triggers ENV forms and U-value/SHGC documentation for the new components.
The fastest TIs touch lighting only and leave the existing HVAC alone. Adding mechanical scope adds 4–8 weeks to the permit timeline.
The closeout package
What we hand the inspector at final: signed NRCC forms (design), NRCA test results (verification), product cut sheets matching the energy submittal, and the building owner's operations manual covering controls operation. This is the full Title-24 package.
What we don't do: scramble for it the week of final. The closeout package should be built from day one of submittal on every TI. That's the difference between a first-try final pass and a three-week corrections cycle.
Common reasons commercial TIs fail final
Common patterns behind final-inspection failures:
- Light fixtures installed in different quantities or wattages than the NRCC submittal. Even a small change has to be re-submitted with revised forms.
- Occupancy sensors mounted in the wrong location (too high, too far from doorway, behind a partition). Sensor placement is part of the controls drawing and the inspector compares as-built to drawing.
- Daylight zones not properly defined or fixtures not actually wired to daylight sensors despite being in the zone.
- Receptacle controls missed entirely. The 2022 code requires 50% of receptacles to be controlled in many space types, switched off when the space is vacant.
- Time-switch schedules not programmed at substantial completion. The system is installed but the schedule is blank, so the controls don't actually run.
The fix for each item is small. The compounded delay is real. Building the closeout in parallel with the install prevents every one of these.
Frequently asked questions
What is Title-24 in plain English?
Title-24 is California's set of building energy efficiency standards. Part 6 (Energy) governs lighting, controls, mechanical efficiency, and envelope insulation. Every commercial tenant improvement in California has to comply and file the associated paperwork.
Does every commercial buildout require Title-24 compliance?
Any project that touches lighting, HVAC, or the envelope triggers Title-24 documentation. Purely cosmetic scopes (paint, carpet, non-load-bearing partitions with no lighting changes) usually don't.
How much does Title-24 compliance add to a project?
Documentation and testing add $2–$8K to a typical office TI, depending on square footage and system complexity. LED lighting upgrades required to meet current LPD caps can add $5–$20K on legacy fluorescent retrofits.
What's NRCA acceptance testing?
Non-Residential Compliance Acceptance testing verifies that installed lighting controls, HVAC economizers, and other systems actually perform to design. A CALCTP-certified technician tests and signs off. Test results are filed before final inspection.
