Front Orientation on a Title 24 Report: Why It Matters and What Rotating the House Does
A performance report uses the actual compass bearing of the front of the building, and the plans must show the same orientation. If the lot is flipped or the house is turned, windows facing a different direction change the result, so the calculation is rerun. Cardinal compliance can cover all four orientations on one report.
- Choose your report
- Upload your plans
- Pay securely
- Permit-ready report by email
What the input means
In a performance calculation the orientation entry is the true azimuth of the building front. Under the prescriptive approach, orientation matters because some limits depend on it, such as west-facing glass. The manual notes the effect is strongest in cooling-dominated zones with a lot of west glass.
How facing is defined
Each direction covers a 45 degree sector either side of true north, east, south or west. West-facing includes northwest but excludes southwest. A wall at a diagonal bearing therefore falls into one bucket or another, and that bucket decides which glass limit it counts toward.
What your house is compared with
For a new building, the reference house takes your floor area and configuration, then divides walls and windows equally among the four points, so your design faces a house with no favored side. For additions and alterations, the reference keeps the existing building's own wall and window areas and orientations instead.
When the orientation is not settled
A builder or owner can have the model show compliance in all four cardinal orientations, and the plans examiner then verifies that it complies facing north, south, east and west. One report covers the plan, including a reversed floor plan. The trade-off is that every orientation must meet the budget with identical measures, so the weakest side sets the design.
After the permit
The inspector checks the front orientation and the floor assembly type at the foundation stage. The compliance manual admits it is hard to judge whether a changed orientation or window location still complies, so a field change that breaks compliance needs approved revised plans and compliance documents rather than a verbal fix. Plan the lot early, and see what happens when plans change.
Related pages
The glass side is covered in window orientation and window area. Reuse of a model is discussed in reusing a report. When you order a residential report, include the site plan with its north arrow.
Common Title 24 Questions
- When is Title 24 required for a home?
- Does a remodel need Title 24?
- Does a room addition need Title 24?
- What plans are needed for a residential Title 24 report?
- How much does a residential Title 24 report cost?
- How long does a residential Title 24 report take?
Frequently Asked Questions
It can, because windows then face other directions. A report showing all four cardinal orientations covers a reversed plan.
The report records the actual azimuth of the front, and the inspector verifies it against the plans.
Explore Energy Calculations
- How Does a Heat Pump Change a Title 24 Calculation?
- How Do Duct Location and Leakage Affect Title 24 Calculations?
- How Do House Size, Stories and Bedroom Count Affect Title 24 Calculations?
- How Does HVAC Efficiency Affect Title 24 Calculations?
- How Does Insulation Affect Title 24 Calculations?
View all Energy Calculations guides → · Reports and Calculations · Title 24 guide