There was no July 2026 Title 24 update. Here's the real calendar.

If you spent the middle of 2026 refreshing the Building Standards Commission's website waiting for a new Title 24 errata or supplement to drop, here's the uncomfortable truth: there was nothing to wait for. No mid-year book update was ever on the calendar for the 2025 edition. Knowing the actual cadence saves you the false alarm — and tells you exactly when the next real change lands.

What actually shipped for the 2025 edition

The 2025 Triennial Edition of Title 24 was published July 1, 2025 and took effect January 1, 2026. Two things arrived with it:

• One errata batch (buff-colored pages), announced in Information Bulletin 26-01 on March 3, 2026 and effective January 1, 2026. It corrected nine parts — the Building (Part 2, Volumes 1 & 2), Residential, Electrical, Mechanical, Plumbing, Energy, Fire, Existing Building, and Green (CALGreen) codes.
• A separate Part 7 emergency supplement to the Wildland-Urban Interface Code, also effective January 1, 2026. Different instrument, same date — we untangled the two in errata vs supplement.

And then? Nothing. As of this writing, no further errata or supplement has been published for the 2025 edition. The newest code item on the BSC News feed is still IB 26-01 from March. The July 8, 2026 entry there is an IAPMO anniversary notice — not a code change.

The pattern is in BSC's own history

Here's the thing: this quiet stretch isn't a lull. It's the schedule working as designed. Look at how the last editions actually moved, straight off the BSC Codes page:

• 2016 edition — took effect Jan 1, 2017 → intervening supplement effective July 1, 2018.
• 2019 edition — took effect Jan 1, 2020 → supplements effective July 1, 2021.
• 2022 edition — took effect Jan 1, 2023 → supplements effective July 1, 2024.
• 2025 edition — took effect Jan 1, 2026 → supplements effective July 1, 2027.

Each edition takes effect on a January 1 and picks up its errata early on. Then the big mid-cycle change — the supplement (blue pages) — lands on July 1, about eighteen months after the edition takes effect. No edition gets a printed update in the first July after it arrives. The 2025 edition is no exception.

Verified against the BSC Codes page and the Commission's own April 2026 CALBO briefing: the 2025 edition's supplements are effective July 1, 2027, and the edition stays in force through December 31, 2028.

So when is the next printed change? July 1, 2027

Mark it: July 1, 2027. That's the effective date of the 2025 Intervening Cycle supplements — the next scheduled change you'll physically insert into a codebook. Publication is slated for January 1, 2027, with a statutorily required 180-day gap before that July 1, 2027 effective date.

And it's a modest round: AB 130 limits what an intervening supplement can even contain, so this cycle is mostly cleanup. We walked through the one item that actually moves — a CALGreen embodied-carbon renumber — in the 2027 supplement preview.

What can still change the code before then

"Predictable" isn't "frozen." Two things can move the code off the printed calendar, so don't read July 2027 as a guarantee of total silence:

• A mid-cycle erratum. Rare, but real. The 2019 edition picked up a second round of errata to the Building and Fire codes effective October 1, 2020 — mid-cycle, off the usual rhythm. So the honest statement is "none has published for the 2025 edition yet," not "none ever will."
• Emergency standards. These can be adopted at any time. The 2025 edition's Part 7 emergency supplement is the live example: the State Fire Marshal's wildfire standards run on their own track, outside the triennial rhythm.

Everything else waits for July 1, 2027. If a colleague swears a new Title 24 book "dropped in July," ask which part and which effective date — then confirm against the edition your jurisdiction has actually adopted before you rely on it.

What CrossBeam does with it

CrossBeam reads plans against the code text that's actually in force today — the 2025 edition with its January 2026 errata applied — and tracks the calendar ahead. So a review never drifts onto a printing that's been superseded, and never waits on one that hasn't shipped. When the July 2027 supplement lands, its changes are already mapped.