Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
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AfterFast, Reliable Home Additions & ADU Across Whitney
A home addition or ADU in Whitney, NV typically runs $45,000-$130,000 for a room addition, and $90,000-$220,000 for a new detached ADU. Most of the older Whitney homes we open up were built in the 1960s through 1980s, and what we find inside changes the job more than any sales pitch ever will. We’re Barrett & Sons Construction, and we’ve been pulling permits in Clark County since 1998. Call (877) 610-1318 and we’ll walk you through what your Whitney lot can actually support.
Whitney sits in unincorporated Clark County, so every permit, inspection, and fee runs through the Clark County Building Department, not the City of Las Vegas. That distinction stops a lot of contractors cold. It doesn’t stop us. We know the County’s inspectors, their checklists, and what they specifically look for on the older concrete block homes that fill the 89122 ZIP.
Why Barrett & Sons Construction Is Whitney’s Preferred Home Additions & ADU Company
Tom Barrett started this company in 1998, and his sons run the crews today. That’s not marketing copy. When we say the owner’s name is on the truck, we mean Tom will be the one calling you back when you have a question about the framing that got opened up last week. Whitney homeowners have been calling us for over two decades because we answer our own phone, and because a live person picks up 24/7 when something feels off.
Our reputation in Whitney is built on the jobs where things got complicated. A 1972 block ranch off Boulder Highway with a cracked lintel and aluminum wiring. A garage conversion near Whitney Recreation Center that needed a full rewire before the inspector would even look at the framing. These aren’t bullet points on a flyer; they’re what we do every month in the 89122 ZIP. If you want to verify anything before you sign, Tom’s name, address, and license number are published and easy to look up. We’d rather you check than guess.
Key Takeaways:
- Whitney permits run through Clark County, not the City of Las Vegas. We pull them correctly the first time.
- Every price change arrives as a written change order before work proceeds. No surprises at the end.
- Our crews are background-checked and wear the Barrett & Sons name on their shirts.
- Free estimates for every Whitney home addition and ADU project. Call (877) 610-1318.
Our Home Additions & ADU Services in Whitney
ADU Design & Permitting
Detached ADUs in Whitney trigger Clark County permit reviews that include structural, electrical, plumbing, and energy compliance. The County’s plan reviewers specifically check seismic ties and wall retrofits on older CBS homes, and they will reject drawings that don’t address them. We handle the full design package and the permit submittal, then stay on the job through every inspection sign-off.
Garage Conversion ADU
Garage conversions are often the most cost-effective ADU path in Whitney, with most projects running $30,000-$80,000 depending on the condition of the existing slab, electrical panel, and access. Older Whitney garages frequently have unpermitted add-ons and original electrical that won’t pass a County inspection. We scope it, permit it, and convert it into a rentable or multi-generational living unit that actually meets Clark County code.
New Detached ADU
A new detached ADU in Whitney runs $90,000-$220,000. That range reflects caliche excavation, utility trenching, and the foundation engineering that Whitney’s hardpan demands. We budget for what’s under the soil in the original allowance, not in a surprise change order later. If you’ve got the lot depth near Boulder Highway or Whitney Peak Drive, we’ll tell you honestly what it will cost to build there.
Junior ADU & Interior Conversion
Junior ADUs inside an existing Whitney home are the fastest way to add a legal, rentable unit without trenching new utilities. These conversions often mean reconfiguring a bedroom wing or den into a self-contained suite with its own entrance and efficiency kitchen. The questions are structural: which walls are load-bearing, and whether the existing panel can carry the added appliances. We answer both before drawings go to the County.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Whitney
We install and stand behind Simonton, Ply Gem, and PGT windows and doors on Whitney additions, because those are brands you can look up and read about before you spend a dollar. On additions and ADUs that need glazing rated for 110°F summers, we favor PGT impact-rated units and Simonton’s low-E thermal lines. If something fails under warranty, we’re the ones who come back to Whitney and fix it. That’s part of the 90-Day Done Right Promise Tom puts on every written contract.
Common Home Additions & ADU Problems We See in Whitney Homes
- Aluminum wiring from the 1960s and 70s. Clark County inspectors will flag it the moment a wall is opened for a room addition or second story. You either rewire the affected circuits or the permit stalls.
- Unreinforced block walls that predate modern seismic code. Whitney’s mid-century CBS homes often lack the steel ties and lintels the County now requires when you cut new openings. Our structural engineer details the retrofit before demo starts.
- Caliche hardpan turning footing digs into jackhammer work. If your ADU allowance doesn’t account for caliche excavation, you’ll see a change order the size of a small roof. Ours accounts for it up front in Whitney.
- Contractors pulling permits through the wrong jurisdiction. Whitney is unincorporated Clark County. A City of Las Vegas permit means a failed inspection sign-off and a stopped job. We file through the County’s portal every time.
Pricing for Home Additions & ADU in Whitney, NV
Here’s what we’re seeing on current Whitney jobs. These are real numbers for the 89122 market, not national averages from a website.
| Project | Typical Range in Whitney |
|---|---|
| Home Addition | $45,000-$130,000 |
| ADU Construction | $90,000-$220,000 |
| Garage Conversion | $30,000-$80,000 |
The spread comes down to what’s inside the existing walls and under the slab. Aluminum rewiring, caliche excavation, and block wall retrofits are the three biggest cost movers on Whitney additions. We write allowances for each of them into the contract so you see the number before the work happens, not after. Call (877) 610-1318 and we’ll give you a written line-item estimate tied to your actual Whitney address, not a square-foot formula.
We Also Serve Cities Near Whitney
Our Home Additions & ADU team covers Whitney and the surrounding valley communities, including Paradise, Winchester, Las Vegas, and Sunrise Manor. If you’re in Whitney or just across the boundary near Flamingo or Boulder Highway, we know which building department has jurisdiction on your street. That matters more than most people realize until a permit gets rejected.
Serving Whitney, NV - Our Local Coverage Area
We’re based in the Whitney area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Home Additions & ADU in Whitney
Yes. Whitney is unincorporated Clark County, and any garage conversion that adds living space, a kitchen, or a bathroom requires a County building permit plus electrical, plumbing, and mechanical permits. Converting without one means the work is uninsurable and can block a future sale. Call (877) 610-1318 if you bought a Whitney home with an unpermitted conversion and want to know what it takes to bring it legal.
You can, but the Clark County inspector will require the affected circuits to be brought to current code before the addition is signed off. That means rewiring the portions of the home tied into the new work. We plan for that cost in the original estimate so it doesn’t arrive as a surprise after the walls are open. Call (877) 610-1318 for an exact quote on your home.
Whitney sits on caliche hardpan, a calcium carbonate crust that turns routine footing digs into jackhammer work. A contractor who quotes Whitney excavation prices based on softer Henderson soil is low-balling you, and the change order will arrive once the blade hits the hardpan. Our ADU allowances include caliche excavation from the start. Call (877) 610-1318 for a written estimate that covers what’s actually under your lot.
Our structural engineer reviews the original plans, the roof framing, and the wall runs before we write a scope of work. On Whitney’s 1960s CBS homes, the answer is frequently yes, because those houses used interior block walls as the primary structural system. Cutting an opening without a retrofit plan is how you get a sagging header and a denied permit. Call (877) 610-1318 and we’ll walk the house with you.
We pour summer slabs in Whitney during the early morning window, typically between 4 a.m. and 8 a.m., before the heat hits 110°F and the mix starts to set too fast. It takes disciplined scheduling, but it’s done all summer by crews who know the valley. We also use hydration control and shaded curing when the temperatures demand it. Call (877) 610-1318 to get your ADU on our pour schedule.
Call Barrett & Sons Construction at (877) 610-1318 for a free, written estimate on your Whitney home addition or ADU. We’ll inspect the existing walls, check the caliche, pull the Clark County permits, and show you every allowance in writing before a single nail moves.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Whitney, NV since 1998.