Are there hidden fees?

No. Our plan price is flat and published, and it already includes two revisions, city corrections, and permit-ready PDF delivery — with no sales tax in California. The only charges from us are optional, opt-in add-ons. That said, building an ADU involves third-party fees that are outside our scope, and we list them openly here so nothing surprises you.

What is always included in our price

• Permit-ready PDF delivery
• Two rounds of revisions
• City plan-check corrections on our MEP plans until permit issuance
• No sales tax; identical pricing statewide
• Standard 5-business-day turnaround at $0

Optional charges from us (only if you choose them)

Third-party fees that are NOT part of our scope

These are billed by the city, your utility, or other consultants and contractors — not by us. They vary widely by jurisdiction and project:

• City permit and plan-check fees charged by your building department.
• School and impact/development fees (many ADUs under 750 SF are exempt under state law).
• Utility connection fees for water, sewer, gas, and electric — water and sewer in particular can run into the thousands.
• Architectural design changes and structural engineering — we prepare MEP only.
• HERS field verification testing by an independent certified rater, where the energy design requires it.
• Site visits and contractor installation work — equipment, labor, slab cutting, service upgrades, and similar items are contractor scope.

Think of it this way: we provide the permit-ready MEP plans for one transparent fee. The city, the utilities, your contractor, and (when required) a HERS rater each charge their own fees that are outside our control. We call these out up front so you can budget the whole project accurately.

For example, a 600 SF Full MEP order is $1,495 with nothing hidden added — if you opt into Title 24 it becomes $1,735, and your city's permit fee (billed by them) is separate. For the full picture, read the cost of ADU MEP plans and the complete ADU MEP guide, then see the pricing page or place your order.