T24Studio
Service area · Riverside County

Title 24 reports for Riverside permits.

Riverside publishes real turnaround numbers by project size, and runs its own Dwell Riverside permit-ready ADU program — both worth knowing before you submit.

Local plan check

Tiered turnaround times, and a genuine local ADU fast-track

Riverside’s Community & Economic Development Department runs plan check out of its “One Stop Shop” at City Hall, with both online submittal (Public Permit Portal) and in-person drop-off still available. The city publishes actual tiered turnaround times: same day over the counter, 10 business days for Tier 1 and 20 business days for Tier 2 on a first review, with resubmittals running same day, 10 or 10 business days on the same tiers. ADUs sit in Tier 2 and JADUs in Tier 1, and staff keep explicit discretion to reclassify a project between tiers. An expedited review option can roughly cut the standard timeline in half for an added fee.

Riverside runs Dwell Riverside, a permit-ready ADU program with 4 pre-designed models (746–1,200 sf) that gets a 3-business-day initial review instead of the standard tier — eligible only on single-family-zoned lots outside flood zones. Riverside also codifies a third accessory-unit type most CA cities don’t: the MADU (Moveable Accessory Dwelling Unit), a DMV-registered chassis-mounted unit between 150–430 sf, with its own siting rules. No local energy reach code beyond state CALGreen/Title 24 was found — Riverside’s own Green Building Standards page administers CALGreen only.

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.

Nearby, same flat rate: Moreno Valley, Fontana, Corona and Rancho Cucamonga.

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.

See the full rate card

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

Riverside plan-check questions

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

How fast does Riverside review a small residential project?
The city's plan-check page says smaller projects may be reviewed initially within 10 business days, versus 20 business days for most new projects — a published tier, but worded as “may,” not a commitment, and not specific to residential work.
What is Dwell Riverside?
Riverside's permit-ready ADU program — 4 pre-designed models between 746 and 1,200 square feet, eligible on single-family-zoned lots outside flood zones, that get a faster 3-business-day initial plan review instead of the standard residential tier.
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.

Where in California do you work?

All of it. The work is remote and the code is statewide, so the city makes no difference to price or turnaround — jobs run from San Diego to the Bay Area, and all 16 climate zones are covered. I run the 2019, 2022 and 2025 code cycles, so an older permit still in process is fine.

Send your Riverside plans.

Standard submittal or a Dwell Riverside model — either way, the CF1R comes back registered and ready for the One Stop Shop.