What should I look for when choosing an MEP plan provider?

Choosing the right MEP provider comes down to one question: will their plans pass plan check in your California city without costly delays? The criteria below separate providers who deliver permit-ready, code-compliant sets from those who hand off generic sketches that draw corrections.

The essentials

• California-specific experience — California has unique Title 24 requirements, 16 climate zones, CALGreen mandates, and local code amendments. A provider who works statewide should know how these vary by jurisdiction.
• Permit-ready deliverables, not sketches — Confirm that load calculations, Manual J heat-load calcs, equipment schedules with model numbers, and GFCI/AFCI notation are all included. If a provider can't tell you these are in the set, keep looking.
• City corrections included — Reputable providers handle plan-check corrections at no extra charge until the permit is issued. Ask explicitly whether revisions and corrections cost extra.
• Matching turnaround — If you have a deadline, confirm priority and rush options exist and what they cost.
• Title 24 capability — A provider who can prepare the CF1R alongside the MEP keeps the energy model and mechanical sheets coordinated, eliminating a major source of corrections.

Questions to ask before you order

1. Are your plans formatted at 24" x 36" and compatible with my city's electronic submittal portal?
2. Do load calculations and equipment schedules come standard, or are they extra?
3. How many revisions are included, and are city corrections free until permit issuance?
4. Will you confirm whether my jurisdiction requires an engineer's stamp before drafting?
5. Can Title 24 be bundled so the energy report and MEP match?
6. Is pricing flat and quoted up front, or billed hourly with open-ended cost?

Red flags to avoid

• Vague deliverables with no mention of calculations or schedules
• "Corrections cost extra" or per-revision fees that can balloon during review
• No California-specific knowledge of climate zones or Title 24
• Generic, reusable templates not tailored to your address and site

How we measure up

We deliver permit-ready, California-specific MEP sets with full calcs and schedules; every order includes two revisions and city corrections at no extra charge; standard turnaround is 5 business days with priority (+$299) and express (+$599) options; and Title 24 can be bundled for +$240 so everything stays coordinated — all at flat, up-front pricing with no sales tax.

Reviews, portfolio, and responsiveness

Beyond the technical checklist, a few practical signals separate a smooth experience from a frustrating one. Look for evidence the provider has handled ADUs in jurisdictions like yours, clear communication during intake, and a willingness to explain their scope in plain language rather than jargon. A provider who asks the right questions up front — climate zone, panel size, system preference, deadline — is one who is building your plans correctly the first time, not guessing.

Local vs. statewide providers

A traditional local engineering firm can be excellent but is often priced for commercial work and slower for a small residential ADU. A specialized statewide ADU provider, by contrast, is set up for exactly this scope — flat pricing, fast turnaround, and California-specific code fluency across all 16 climate zones. For most homeowners and contractors building a single ADU, the specialized model delivers the same permit-ready result with less cost and less back-and-forth.

For more on our process and pricing, see How It Works, the pricing page, and our FAQ. When you're ready to compare, you can configure a package on the order page — and as always, confirm submittal specifics with your local building department.