Can Title 24 and MEP Engineering Come from the Same Company?

Title 24 compliance is a claim about a specific design: these assemblies, this equipment, these controls, these schedules. MEP design is the ongoing evolution of that same design. Every time the two diverge — a substituted rooftop unit, a revised lighting control sequence, a value-engineered glazing change — the compliance documents drift from reality. One team holding both scopes closes that gap by construction, because the person updating the drawings sits next to the person updating the model.

• Equipment substitutions flow into the model the same day
• Lighting and controls changes stay consistent with documented assumptions
• Drawing revisions and model revisions share one revision log
• Plan-check comments get answered against a single coordinated record

Bundled delivery keeps a single revision stream, so the energy model and the design cannot silently diverge — but compliance review must stay rigorous even without an outside preparer. Split delivery gives an independent preparer who may catch design assumptions the designer missed — but coordination lag means late design changes may never reach the energy model.

I expect three things from any firm offering both scopes. First, separate responsible professionals identified for the MEP design and the compliance documentation, even inside one company. Second, a documented internal check where the compliance package is reviewed against the issued drawings before submittal — not after plan check finds the mismatch. Third, model inputs that trace to specific drawing sheets, schedules, and specifications, so a reviewer can verify every assumption without taking anyone's word for it.

• Named responsible professionals for each scope
• Internal compliance review before permit submittal
• Model inputs traceable to issued drawings and schedules
• Revision tracking that ties model versions to drawing issues

Splitting can work when the project already has a design team under contract and needs a compliance specialist for a tricky occupancy or an aggressive performance target. It also makes sense when the owner wants an independent second set of eyes on the energy strategy. What does not work is splitting by default and hoping coordination happens on its own — it needs a named owner, a shared revision log, and a contractual obligation to keep the model current through every design change.

• Design team is already contracted and needs a compliance specialist
• Owner wants an independent review of the energy strategy
• Complex occupancy benefits from dedicated modeling expertise
• Coordination ownership is assigned in writing, not assumed