An ADU builder in Goodyear is a licensed contractor who designs and constructs accessory dwelling units — detached backyard units, garage conversions, attached additions, and junior ADUs (JADUs). Because an ADU is a complete second dwelling, the builder coordinates foundation, framing, plumbing, electrical, and HVAC work and pulls it through Goodyear's permit process and utility connections. Not every general contractor has built one, so the right builder is one with ADU-specific experience in Arizona.
What ADU Builders Cost in Goodyear [7]
Based on our Goodyear cost data, expect the following ranges from local ADU builders. Quotes for the same scope typically vary 20-40% between contractors, so getting at least three bids is the single best way to control cost.
| New Detached ADU (all-in) | $120,000-$245,000 |
| Cost per Sq Ft | $145-$270 |
| Garage Conversion | $55,000-$135,000 |
| Prefab / Modular ADU (installed) | $85,000-$200,000 |
| City Permit & Plan Review | Building permit and plan review fees per the Development Services Fee Schedule (Development Center → Fees), paid through Accela (2.75% card fee) — confirm current amounts with Goodyear Development Services |
| Impact Fees | Yes — Goodyear's Development Impact Fees have been in effect since April 1, 2024 (schedule and 2024 fee report on the Development Center → Fees page); how they apply to an ADU is not stated there — confirm with Development Services before budgeting |
For a full line-item breakdown, see our Goodyear ADU cost guide. To confirm what you're allowed to build before you hire, review the Goodyear ADU rules (max detached size: No larger than 75% of the gross floor area of the principal single-family dwelling or 1,000 sq ft, whichever is less (Goodyear Zoning Ordinance §3.12.3.A.8); owner-occupancy: Not required — §3.12.3 is silent on occupancy and rental terms, and under state law Goodyear may not prohibit leasing or advertising either the house or the ADU as separate long-term rental housing, nor require any familial or other relationship between occupants (A.R.S. §9-461.18(B)(1)-(2)). Short-term rental rules are separate — confirm with the city).
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How to Vet an ADU Builder in Goodyear
- License: Confirm a current contractor's license in Arizona and that it's in good standing. Ask for the license number and verify it with the state board.
- ADU-specific experience: Ask how many ADUs they've completed in or near Goodyear and request addresses or photos. ADU permitting and setbacks differ from a kitchen remodel.
- Portfolio & references: Get references from recent ADU clients and, if possible, visit a finished unit.
- Insurance: Verify general liability and workers' compensation coverage. Ask for a certificate of insurance.
- Written, detailed bid: Insist on an itemized, fixed-price or clearly-scoped bid — not a verbal estimate. It should state whether permits (Building permit and plan review fees per the Development Services Fee Schedule (Development Center → Fees), paid through Accela (2.75% card fee) — confirm current amounts with Goodyear Development Services), plan check (Full residential plan review under Goodyear's adopted building and fire codes; the ADU must be self-contained with a bedroom and bathroom and may include a kitchen (§3.12.3.A.7). State law bars a commercial building code or a fire-sprinkler requirement for an ADU (A.R.S. §9-461.18(D))), and impact fees (Yes — Goodyear's Development Impact Fees have been in effect since April 1, 2024 (schedule and 2024 fee report on the Development Center → Fees page); how they apply to an ADU is not stated there — confirm with Development Services before budgeting) are included.
- Permit handling: Confirm they manage Goodyear's permit process ("A residential building permit through Goodyear's Accela Citizen Access portal, reviewed by Development Services under the new Zoning Ordinance and the adopted design guidelines (§3.12.3.A.4). By-right — no hearing or conditional use permit. Applications filed on or after August 5, 2026 are reviewed under the updated ordinance", typically Confirm with Goodyear Development Services — the city publishes review times on its Development Resources page; minor 'EZ Permits' are approved within 5 business days, but a new ADU is a full residential permit) and who is responsible if revisions are required.
- Payment schedule: Avoid large upfront payments. A reasonable schedule ties payments to completed milestones.
Questions to Ask Before You Hire
- How many ADUs have you built in Goodyear in the last two years?
- Is your bid fixed-price, and what would trigger a change order?
- Are permits, plan check, and utility connection fees included?
- What's a realistic timeline, including permit review (Confirm with Goodyear Development Services — the city publishes review times on its Development Resources page; minor 'EZ Permits' are approved within 5 business days, but a new ADU is a full residential permit) and construction?
- Who is my point of contact and how are delays communicated?
- What warranty do you provide on workmanship?
- Can you share three recent Arizona ADU client references?
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