An ADU builder in Las Vegas 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 Las Vegas's permit process and utility connections. Not every general contractor has built one, so the right builder is one with ADU-specific experience in Nevada.
What ADU Builders Cost in Las Vegas [6][7]
Based on our Las Vegas 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) | $130,000-$250,000 |
| Cost per Sq Ft | $140-$280 |
| Garage Conversion | $60,000-$140,000 |
| Prefab / Modular ADU (installed) | $90,000-$200,000 |
| City Permit & Plan Review | The old $1,030 Special Use Permit fee no longer applies to conforming ADUs under Ordinance 6963; building-permit fees are valuation-based |
| Impact Fees | Confirm with City of Las Vegas Building & Safety |
For a full line-item breakdown, see our Las Vegas ADU cost guide. To confirm what you're allowed to build before you hire, review the Las Vegas ADU rules (max detached size: Amended by Ordinance 6963 (July 2026) - codified text pending; the pre-2026 rule capped all accessory structures at 50% of the principal dwelling's floor area; owner-occupancy: Pre-2026 code required owner residency to rent the unit; treatment under Ordinance 6963 is unconfirmed - verify with Las Vegas Planning).
Get Free ADU Quotes in Las Vegas
Tell us about your project and we'll connect you with ADU builders serving Las Vegas. Free, no obligation — you choose who to work with.
🔒 Your info is secure. We share it only with contractors quoting your project. No spam, no obligation.
How to Vet an ADU Builder in Las Vegas
- License: Confirm a current contractor's license in Nevada 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 Las Vegas 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 (The old $1,030 Special Use Permit fee no longer applies to conforming ADUs under Ordinance 6963; building-permit fees are valuation-based), plan check (Confirm with City of Las Vegas Building & Safety), and impact fees (Confirm with City of Las Vegas Building & Safety) are included.
- Permit handling: Confirm they manage Las Vegas's permit process ("Ordinance 6963 (adopted July 1, 2026) allows conforming ADUs - including full second kitchens - without the former Special Use Permit public-hearing process; a standard building permit is still required. Codified details pending publication", typically Confirm with Las Vegas Planning Department — the SUP hearing process adds months versus over-the-counter permits) 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 Las Vegas 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 Las Vegas Planning Department — the SUP hearing process adds months versus over-the-counter permits) 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 Nevada ADU client references?
Finance Your ADU Project
Most ADU projects are funded through HELOCs, construction loans, or cash-out refinancing. Compare rates from top lenders.
Some links on this page are affiliate links. We may earn a commission at no extra cost to you. Learn more
Are you an ADU builder? Get Las Vegas leads
Homeowners on this page submit real ADU project requests in Las Vegas. We match each one to a local builder. Your first lead is free, then a small per-lead fee — no subscription, and you contract directly with the homeowner.
Get Las Vegas ADU Leads →Frequently Asked Questions
How much do ADU builders charge in Las Vegas?
How do I find a good ADU builder in Las Vegas?
Do ADU builders in Las Vegas handle permits?
How long does it take to build an ADU in Las Vegas?
Get Free ADU Builder Quotes in Las Vegas
Compare bids from experienced local Las Vegas ADU builders. Free, no obligation.
Get Free Quotes →