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 Anthony
A home addition or ADU project in Anthony typically runs $45,000 to $130,000 for a room addition or second story, and $90,000 to $220,000 for a detached ADU. We pull permits for every eligible job and put every scope change in writing before work starts. If you’re weighing an addition against buying a bigger house across the state line, we can walk you through the real numbers for your lot. Call (877) 610-1318 for a free estimate from a contractor who works both sides of Anthony and understands the jurisdiction question before the first shovel goes in.
This page is the only resource that explains how the Texas-New Mexico state line running through Anthony changes contractor licensing, inspections, and lien law for home additions and ADUs before you open a single wall. We’ve been at this since 1998, and Tom Barrett’s name, address, and license number are published and verifiable. Ask anyone on your street, or look up the license number yourself.
Why Barrett & Sons Construction Is Anthony’s Preferred Home Additions & ADU Company
Anthony is not a simple service area. It’s a town split down the middle by a state boundary, and that split complicates nearly every structural project. A single home addition in ZIP 79821 can trigger Texas requirements on one side of the line and Doña Ana County, New Mexico requirements on the other. We confirm parcel-level state jurisdiction before pulling any permit. That verification saves you from a contractor whose license doesn’t actually cover the side of the line your foundation sits on.
Our Home Additions & ADU work in Anthony is managed by crews that carry the Barrett & Sons name, not subcontractors dispatched by a call center. Tom Barrett and his sons are on-site most days. When a wall gets opened in a 1980s slab home and the framing isn’t what the original plans suggested, the person who writes your change order is the same person who saw the condition with his own eyes. No telephone relay. No out-of-state adjuster. Just a local conversation about what the structure actually needs.
Every permit gets pulled, every inspection gets signed, and every allowance is written into the contract before demolition begins. The permit inspector works for you, not for me, which is exactly why I like him. Our 90-Day Done Right Promise is on every contract: if something isn’t right, one call brings Tom back. For Anthony homeowners who’ve been burned by a national outfit that quoted one number and billed another, the difference is in the paperwork, not in the sales pitch.
Our Home Additions & ADU Services in Anthony
ADU Design & Permitting
On the Anthony side of the line, an ADU permit often requires parcel-level verification of which state has jurisdiction. We handle that confirmation first, then design the ADU to the code that actually applies to your lot. No assumptions. No surprises at the permit counter. We’ll prepare the plans, the scope in writing, and the permit package, and we’ll stand there at the inspection if you want us to.
New Detached ADU
A detached ADU in Anthony means digging into caliche. That rock-hard calcium carbonate layer sits just below the surface across this part of the Chihuahuan Desert, and it demands specialized excavation equipment for footings and utility trenching. We budget for caliche on the front end so it doesn’t arrive as a surprise change order in week three. A typical detached ADU here runs $90,000 to $220,000, with foundation and utility runs often driving the spread.
Garage Conversion ADU
Converting an attached garage in Anthony means confronting the slab and the utility crossings before any framing goes up. Many of the older homes here were built with garage slabs that were never intended for living space, so we check the elevation, the drainage, and the electrical service capacity first. We write the allowance for slab correction and utility upgrades into your contract so you see the full picture before demolition starts.
Junior ADU & Interior Conversion
A junior ADU carved out of existing interior space is often the fastest path to a rental unit or a suite for aging parents. In Anthony’s older homes, that means opening walls and finding wiring that predates current code. We plan for those upgrades. When the walls are open, we upgrade the wiring, the insulation, and the egress windows to pass inspection, and we price that work in writing before the permit gets pulled.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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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 Anthony
We build additions and ADUs with materials you can look up. We use premium brands across every trade, including Techo-Bloc and Oldcastle for pavers and hardscape detail, and Quikrete products where concrete work is involved. When your Anthony project calls for a paver patio that ties the addition to the yard, we order from suppliers that serve this area, not from whatever is cheapest off a van. That means fewer delays and materials that hold up to the desert sun and the winter freezes that crack cheap concrete.
Common Home Additions & ADU Problems We See in Anthony Homes
- Undersized framing in 1970s and 1980s slab homes. Many original builds weren’t designed for the load a second story would add. We see framing that would not pass today’s structural review, and we bring in engineered load-bearing beams to correct it before the inspector sees it.
- Outdated wiring hiding behind finished walls. Anthony’s older housing stock often has panels and branch circuits that predate current code. Once a wall is open for an addition, the upgrade is no longer optional, and we plan for that cost in the initial scope.
- Monsoon-driven moisture damage at the subfloor. The Chihuahuan Desert gets hard summer rain, and older slab-on-grade homes here have a history of subfloor compromise from moisture intrusion. We inspect before we frame, and we write a change order for any repair that’s needed.
- Caliche forcing excavation overruns. Homeowners assume digging a foundation is straightforward. In Anthony, it rarely is. The caliche layer requires specialized equipment and adds real cost to any ADU foundation or utility trench. We budget it from day one, not when the excavator hits the rock.
Pricing for Home Additions & ADU in Anthony, NM
Here are the ranges we quote most often across Anthony. These are real numbers for this market, not national averages.
| Project Type | Typical Range in Anthony |
|---|---|
| Home Addition | $45,000 - $130,000 |
| ADU Construction | $90,000 - $220,000 |
| Second Story Addition | $45,000 - $130,000 |
What moves the number here more than anything is what’s inside the walls once we open them. Outdated wiring, undersized framing, and caliche under the foundation are the three big drivers in Anthony. That’s why we inspect first, write allowances into the contract, and never ask you to approve an expensive change after the fact without a written change order in your hand. Call (877) 610-1318 for an exact quote on your lot. Estimates are free, and there’s no trip charge inside the county.
We Also Serve Cities Near Anthony
Our crews work throughout the border region, including Anthony and the surrounding communities of Sunland Park and Chaparral. If you’re on the Texas side or the New Mexico side, the same team covers both, and the same written change order policy applies on every job. We know the state line here as well as any contractor working this corridor, because we’ve been crossing it on projects for decades.
Serving Anthony, NM - Our Local Coverage Area
We’re based in the Anthony 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 Anthony
Yes, you may. The answer depends entirely on which state your parcel is in, not how close it sits to the line. Anthony, TX sits directly on the Texas-New Mexico boundary, and a single addition can trigger conflicting Texas and New Mexico permitting, licensing, and lien law requirements depending on the exact parcel. We confirm parcel-level state jurisdiction before pulling any permit. It’s a step most contractors skip, and it’s the exact step that gets homeowners into legal trouble later. Call (877) 610-1318 and we’ll check your parcel before anything else happens.
Expect to add meaningfully to the excavation line item. Caliche is the rock-hard calcium carbonate layer sitting below the desert surface throughout Anthony, and it forces contractors to bring in specialized equipment for footing and trenching work. On an ADU foundation, that typically adds several thousand dollars beyond standard soil excavation, and it can add more if the caliche is unusually shallow on your lot. We budget for it in the original scope, so you see the caliche cost before we dig, not after the excavator hits it. Call (877) 610-1318 for a site-specific estimate.
The most common upgrades are electrical and structural. Older Anthony homes from the 1970s and 1980s frequently have panels and branch circuits that no longer meet code, and once a wall is open for an addition, the code path to upgrade is triggered. We also see undersized framing that won’t carry the load of the expanded space, especially where a second story is going on. We write allowances for these upgrades into the contract before demolition starts so they don’t arrive as surprise invoices. Call (877) 610-1318 and we’ll walk through what your specific home is likely to need.
Lien rights depend on which state’s mechanics lien law governs your parcel. Texas and New Mexico have different notice requirements, different filing deadlines, and different priority rules. If a contractor files under the wrong state’s law because they assumed the project was on the other side of the line, the lien may be invalid or the property owner may face a cloud on the title that takes months to clear. We confirm jurisdiction before work begins and we make sure every preliminary notice matches the correct state statute. That protects you, and it protects the work product. Call (877) 610-1318 to have us verify your parcel.
No. The slab under an older Anthony garage was typically poured for vehicle storage, not living space. That means the elevation, drainage, and vapor barrier are often wrong for an ADU, and the utility crossings, water, sewer, and electrical, often run along paths that make code-compliant conversion expensive to retrofit. We address the slab and the utilities before any interior framing goes up. Skipping those steps is how you end up with a failed inspection and a torn-up floor at week six. Call (877) 610-1318 for a straight answer on your garage.
Contact Barrett & Sons Construction in Anthony
If you’re planning an addition or ADU in Anthony, the conversation starts with your parcel, your code path, and a written scope. Tom Barrett publishes his name, his address, and his license number. Calls are answered by a live person, 24/7. Every estimate is free, every change order is written before work happens, and every completed job carries the 90-Day Done Right Promise. Call (877) 610-1318 to schedule your free estimate today.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Anthony and the surrounding communities since 1998.