How Much Does a New Detached ADU Cost in Paradise, NV?
A new detached ADU in Paradise, NV typically runs $45,000-$130,000 depending on size, utility connections, and finish level, with most projects taking 4-6 months from permit to final inspection. Because Paradise is unincorporated Clark County, permits route through county development services rather than a city building department, which adds a layer of regulatory navigation that out-of-area contractors often miss. Call (855) 951-4361 for a free on-site estimate and timeline specific to your lot.
Our Process for Building a New Detached ADU in Paradise
We’ve built enough detached ADUs in Paradise to know where the bottlenecks hide. Here’s how we move a project from first conversation to certificate of occupancy.
Stage 1: Feasibility and lot assessment (1-2 weeks). We walk your property with a surveyor’s eye, checking setbacks against Clark County’s unincorporated zoning, verifying utility tie-in points, and flagging any HOA restrictions in your specific tract. For the 1960s-1980s stucco homes east of the Strip, we’re checking whether your original post-tensioned slab has the clearance for trenching new sewer and water lines to a detached unit. You decide at this stage: attached garage conversion versus fully detached, and roughly what square footage fits your budget.
Stage 2: Design, engineering, and permit package (4-8 weeks). Our architect produces stamped plans for Clark County Development Services, including the separate right-of-way permit if your lot fronts a county-maintained corridor near the airport or Strip corridor. This is where Paradise’s unincorporated status trips up contractors who’ve only worked in Las Vegas or Henderson city limits. We also order the GPR scan of your existing slab before any utility design is finalized, since cutting a post-tensioned cable without it is a structural liability we won’t take. You decide: roof style (gable for attic storage, flat for modern profile), window package, and whether the unit needs a full kitchen or kitchenette.
Stage 3: Site prep and foundation (2-3 weeks). We strip topsoil, install temporary erosion control for monsoon season readiness, and pour either a stem-wall foundation or slab-on-grade depending on your finish floor elevation. In Paradise’s caliche-heavy soils, we often hit hardpan within 18 inches, which can extend this stage if pneumatic breaking is needed. You decide: floor covering material, which affects slab prep and moisture barrier specs.
Stage 4: Framing, MEP rough-in, and dry-in (4-6 weeks). Walls go up, roof sheathing and underlayment go on, and we pull electrical, plumbing, and HVAC rough-in before insulation. We schedule this stage for pre-dawn starts in July and August, when Paradise asphalt temperatures push 115°F by 10 a.m. and concrete cure windows collapse. You decide: exterior siding (stucco to match the main house, fiber cement for lower maintenance, or vertical metal for modern contrast), and HVAC system type (mini-split versus ducted).
Stage 5: Finishes, final inspection, and walkthrough (3-4 weeks). Insulation, drywall, flooring, cabinets, fixtures, and appliances. We coordinate Clark County’s final inspection, which includes verification that the ADU’s electrical panel is properly sub-metered if you’re planning future rental income. You do a punch walk with our project lead, and anything not matching the signed scope gets logged for correction under our 730-Day Done Right Promise.
Most Home Additions & ADU in Paradise projects that include a new detached ADU as part of a full property overhaul will extend this timeline, but the sequence stays the same.
The Spec Choices That Shape Your New Detached ADU
Every decision below moves your number and your long-term satisfaction. We don’t upsell; we explain the trade-off and let you choose.
- Foundation type: Monolithic slab-on-grade runs $8,000-$15,000 less than stem-wall with crawl space, but the latter gives you utility access without slab penetration and handles Paradise’s caliche soil expansion better. For rental units where you’ll be pulling maintenance yourself, the crawl space pays back.
- Framing and sheathing: Standard SPF studs with OSB sheathing versus advanced framing with ZIP System sheathing. The latter costs 12-18% more upfront but eliminates separate house wrap and reduces thermal bridging, which matters when you’re cooling a small volume against 110°F+ Paradise afternoons.
- Exterior finish: Traditional three-coat stucco matches most Paradise tract housing from the 1970s and 1980s. Fiber cement siding (James Hardie or equivalent) runs 15% more installed but won’t crack in the thermal cycling that bakes east-Paradise walls daily. Vertical standing-seam metal reads modern and sheds monsoon rain fast, though it amplifies sound in hail events.
- Windows and doors: Vinyl dual-pane is the baseline and meets code. Upgrading to fiberglass-framed (Andersen or Pella) adds roughly $2,500-$4,000 for a 500-square-foot unit but holds paint longer and doesn’t sag in the heat. For security-focused clients, we spec multi-point locking entry doors with reinforced jambs, standard on our builds.
- Kitchen and bath package: Kitchenette with dorm-size appliances and a wet bath keeps the footprint tight and the budget near the $45,000 range. Full kitchen with 24-inch appliances, quartz counters, and a separate tub-shower combo pushes toward the $90,000+ end. We source through KraftMaid and Cambria for clients who want brand-name material confidence.
- HVAC strategy: Wall-mounted mini-split, single zone, is the cost leader and perfectly adequate for 400-600 square feet. Ducted central air adds $3,500-$5,500 but distributes temperature more evenly and gives you filtration options that matter during dust storm season.
Homeowners often pair a new detached ADU with interior work on the main house. If you’re updating the primary kitchen while we build out back, our Kitchen Design & Layout in Paradise crew can coordinate finishes so both spaces feel connected. And since most ADUs need hard surface flooring that can handle tenant turnover, our Backsplash, Tile & Flooring in Paradise team is frequently on the same job sites.
What New Detached ADU Costs in Paradise, NV
For Paradise specifically, a new detached ADU runs $45,000-$130,000. The table below breaks where most projects land based on scope.
| Project Tier | Size Range | Typical Price Range | What It Includes |
|---|---|---|---|
| Entry-level | 400-500 sq ft | $45,000-$65,000 | Kitchenette, wet bath, mini-split, vinyl windows, basic finishes |
| Mid-range | 500-750 sq ft | $65,000-$95,000 | Full kitchen, separate bedroom, tub-shower, upgraded HVAC, quality finishes |
| Premium | 750-1,000+ sq ft | $95,000-$130,000 | Full kitchen with brand appliances, dedicated laundry, covered patio, high-efficiency systems |
Five variables push you up or down this range:
1. Utility extension distance. Trenching sewer, water, and electrical 80 feet across a Paradise backyard with caliche soil runs $4,000-$8,000 more than a 20-foot stub from the main house. If your existing septic or sewer lateral is at capacity, that number climbs.
2. Foundation complexity. Standard slab on stable grade is your baseline. Stepped foundations for sloped lots, or helical piers where expansive soils are flagged by the soils report, add $5,000-$12,000.
3. Material grade and brand selections. The jump from builder-grade cabinets and LVP flooring to KraftMaid semi-custom with tile or engineered hardwood can swing $8,000-$15,000 on a 600-square-foot unit.
4. Permit and impact fees. Clark County’s unincorporated permit structure for a new detached ADU includes building, mechanical, electrical, plumbing, and potentially right-of-way permits if you front a county road. Total permit and impact fees typically run $3,500-$7,500 depending on square footage and whether parkland dedication fees apply.
5. Monsoon and heat scheduling. Not a material cost, but a real one: if your project hits the July-September window and we need to erect temporary drainage or protect fresh concrete from flash rain, contingency labor adds 3-5%.
Our written estimate itemizes all of the above. What’s not included: your own HOA application fees, separate architectural review if required, utility connection fees charged directly by NV Energy or the Las Vegas Valley Water District, and any main-panel upgrade if your existing service can’t handle the ADU load.
Why Paradise’s Unincorporated Status Changes Everything
Paradise isn’t a city. That’s the first thing we tell homeowners who’ve gotten bids from contractors based in Henderson or downtown Las Vegas. As an unincorporated Clark County CDP, every permit for a new detached ADU routes through Clark County Development Services, and the inspectors who cover Paradise are the same ones who sign off on casino high-rises and airport corridor work. They know the county code cold, and they have zero patience for contractors who show up with city of Las Vegas permit paperwork.
We’ve seen it repeatedly: a contractor pulls a building permit, breaks ground on a post-tensioned slab without the mandatory GPR scan, and gets red-tagged when the county inspector asks for the tension-cable clearance documentation. Or they miss the separate right-of-way permit for the sidewalk or alley access, which is standard in Paradise’s dense residential pockets east of the Strip but foreign to contractors who’ve only worked in incorporated jurisdictions.
The housing stock here is specific. ZIP 89119 is dominated by 1960s-1980s single-story stucco tract homes on post-tensioned slabs, with newer commercial and hotel development pressing in from the airport corridor. Those older slabs were engineered for the main house only, not for additional sewer laterals or electrical sub-panels. When we design a new detached ADU for a Paradise lot, we’re accounting for caliche soil expansion, the thermal load of 115°F summer walls, and monsoon drainage that the original 1970s grading never anticipated.
Our Home Additions & ADU team has navigated county permitting for years across Paradise and surrounding markets. The regulatory fluency isn’t a bonus; it’s the difference between a 4-month build and a 9-month permit nightmare.
Serving Paradise, NV - Our Local Coverage Area
We’re based in the Paradise area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked - New Detached ADU in Paradise
Most new detached ADU projects in Paradise take 4-6 months from permit approval to final county inspection, with permit processing adding another 4-8 weeks before construction starts. The county’s unincorporated status means no city-level expediting, so accurate initial paperwork matters more than here than elsewhere. Call (855) 951-4361 and we’ll review your lot’s specific timeline.
Yes, and it’s a Clark County permit, not a city of Las Vegas permit. You’ll need building, electrical, plumbing, and mechanical permits at minimum, plus a separate right-of-way permit if your lot touches a county-maintained road or alley. We handle the entire package, including the GPR scan documentation the county requires before any slab work.
You can avoid disturbing the main house’s plumbing, but you’ll still need new sewer and water lines trenched from the main to the ADU. For Paradise’s post-tensioned slabs, we route around the house rather than through it, using directional boring where trenching would compromise the slab. This adds cost but preserves your foundation’s integrity.
A garage conversion typically runs $30,000-$80,000 versus $45,000-$130,000 for new detached construction, but the detached unit adds more resale value and rental income potential in Paradise’s market. Detached also avoids the headache of matching existing slab elevations and dealing with garage door infill. If your garage is your only covered parking, the trade-off gets sharper.
Every new detached ADU we build is covered by our 730-Day Done Right Promise, if it’s not done right, we make it right, one of the longest workmanship guarantees in residential construction. Manufacturer warranties on windows, roofing, and appliances run separately and typically extend 10-25 years. We document all warranty registrations and deliver them at final walkthrough.
Get Your Free On-Site Estimate for a New Detached ADU in Paradise
Call (855) 951-4361 and a live person will answer, 24 hours a day. We’ll schedule a free on-site estimate and design consultation at your Paradise property, walk the lot with you, and deliver an itemized written quote with upfront pricing and no surprises. Ask about our current promotion: $1,000 off projects over $10,000, plus 0% financing for 18 months on approved credit.
Written by Todd Mervyn, Owner at Groundwork Construction Co., serving Paradise and the Las Vegas valley since 2014.