What Happens If the Architect Changes the Plans After Title 24?

Clear cases and unclear ones

The compliance manual gives both kinds. Code compliance is clear when a single-glazed metal window is swapped for a high-performance double-pane vinyl one. It may be hard to judge when the orientation of the house or the location of a window changes. Treat the second kind as a reason to re-run the model rather than assume.

What the model is built from

For a new home the standard design uses the same conditioned floor area, volume and gross wall area as the proposed design, but splits the wall area equally among the four orientations. For alterations it takes the same geometry and orientation. Moving a wall, rotating the plan or shifting glass from one side to another therefore changes the budget as well as the design. The compliance manual also warns that software may not check every mandatory measure on its own, so a change can pass the model and still fail plan check.

Changes that change the project class

• An addition is any change that increases both conditioned floor area and conditioned volume.
• A loft built inside the existing conditioned volume is an alteration.
• A floor-to-ceiling bay window that adds both floor area and volume is an addition.

A drawing edit that flips the class swaps the whole rule set, so tell the preparer before the sheet is issued.

What to send

List which sheets moved: floor plan, elevations, window schedule, assemblies or equipment schedule. If the change arrives after the permit application, the steps are in a permit revision after plan check. How the certificate and drawings must agree is on what the plan set must show, and 15 mistakes lists the mismatches plan checkers flag most. Window changes are covered under new windows. For a house or ADU, residential Title 24 reports are re-run against the current set.

Common Title 24 Questions

1. What is Title 24?
2. Do I need a Title 24 report?
3. How much does a Title 24 report cost?
4. How long does a Title 24 report take?
5. What is included in a Title 24 report?
6. What plans do I need to upload?

Frequently Asked Questions

Does moving one window require a new report?

Who decides whether an amendment is needed?

Explore Title 24 Revisions

1. What Happens If the Contractor Installs Different Equipment Than the CF1R?
2. Which Field Changes Need an Amended CF1R? A Quick Reference
3. Changed HVAC After the CF1R: What to Do
4. Changed Water Heater After the CF1R: What to Do
5. Changed Windows After the CF1R: What to Do

View all Title 24 Revisions guides → · Permits and Compliance · Title 24 guide