T24Studio
Service area · Riverside County

Title 24 reports for Corona permits.

Corona reviews first submittals in 10 business days and says outright that it already operates on an accelerated review — the trade is an intake that refuses incomplete sets rather than correcting them.

Local plan check

Fast on purpose, and strict at the door

Corona publishes a number and defends it: 10 business days for a first submittal, 5 for a resubmittal. Asked whether a plan check can be expedited, the city answers that “the city already operates on an accelerated review.” Electronically, through eTrakit and ProjectDox, that clock doesn’t start until prescreen clears, and prescreen “can take up to 5 days.” The trade is a strict door. The single-family handout opens with “omission of any required items listed below will result in refusal of plans for plan check,” and the FAQ names three places an incomplete set gets turned away.

That makes the energy set worth getting right the first time. The handout asks for two sets of Title 24 energy calculations at 8½ × 11 and that “compliance forms shall appear on the plans” — a loose report alone fails that wording. Corona publishes Climate Zone 10 in its own design-parameters block. An ADU goes in as five parallel submittals, grading first, and the flow chart puts PV inside the model: solar sizing has to be included in the design plans and energy calculations (more on ADU solar). No local energy reach code beyond the state code was found on the city’s pages. An energy comment here costs the intake, not a quiet correction.

One thing that doesn’t change by city: my price and turnaround are flat statewide — $99 first report, $150 flat after, 24–48 hours on your first job. What differs city to city is what happens on the plan-check side before and after the CF1R lands in your permit set, which is what this page covers.

Rates

Prices

Flat fees, in writing before I start. No hourly, no bid package, no change-order games — the number on the quote is the number on the invoice.

New client offer

Your first report with me

$150$9924–48 hours

One per client, homes under 3,000 square feet. Full energy model, CF1R and CHEERS registration. It’s a test run — send one job and see how it goes.

Every model after the first

$150Per model

The standard rate once you’re a client — the second building, ADU plus main house, the next project that walks in. Back in 3 business days.

Over 3,000 square feet

QUOTED

Quoted from the plans before any work starts, same day.

24×36 plan-sheet set

$20

Your CF1R laid out full size, matched to your drawing set. Comes back as a PDF you drop straight in.

Revisions

FREEFirst two

Two revisions included, plus questions any time. Past two I quote first, before I touch it.

Commercial / tenant improvement

QUOTEDSame day

Send the plans and you’ll have a flat quote back the same day. No deposit, no minimum.

Disclosure

One honest note

I’m not a licensed engineer or architect, and I don’t stamp drawings. On the CF1R I’m the documentation author — you stay the responsible designer. Nothing about your role on the job changes.

That’s on purpose. I’m not after your scope or your clients. I do one piece of the permit set — the piece that usually holds it up — and I do it fast.

Questions

Corona plan-check questions

If yours isn’t here, see the full FAQ or call and ask.

When does Corona’s 10-day review clock actually start?
Not at upload. On an electronic submittal the city prescreens first, and the FAQ says that prescreen process can take up to 5 days — the 10 business days for a first review run after it clears, and resubmittals get 5. The city also publishes the add-ons: a business day to route in, one after review, and up to three after approval to prepare the permit.
Does Corona have pre-approved ADU plans I can use?
Not in practice yet. Corona has opted into the AB 1332 pre-approved plan program and invites design professionals to submit plans, but its construction-standards page says links will be posted when they become available — and the list below that sentence is still empty. An ADU there submits as five parallel packages: grading, building, fire sprinkler, landscape and solar.
Does my ADU or addition actually need one?

Almost certainly. New conditioned floor area — ADUs, JADUs, garage conversions, additions — triggers Title 24. So do alterations that touch the envelope, the ductwork, or the HVAC equipment, including a straight change-out. A remodel that only moves non-structural interior partitions usually doesn’t.

Send it either way. If it doesn’t need a report I’ll say so and there’s no charge for the look.

What do you need from me to start?

A PDF of the architecturals and the project address. Floor plans, elevations and a window schedule is plenty.

You don’t need the HVAC or water heater picked. If the plans don’t call them out, I model what I’d normally specify for that job — and I list every assumption in the email so nothing is buried. Swap any of it and I rerun; that doesn’t count against your free revisions.

The design doesn’t have to be finished either. Early is often better, because that’s when a compliance problem is still cheap to fix.

Send your Corona plans.

The CF1R comes back as two 8½ × 11 sets plus compliance forms formatted to print on the plan sheets — both halves of what the handout asks for.