A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateFast, Reliable ADU Builders Across Carrollton
ADU construction in Carrollton costs $185,000 – $340,000 for a detached backyard unit and $95,000 – $160,000 for a garage conversion, before permit fees. Those are real ranges we quote from actual projects in this city, not national averages. If you live in Carrollton and you’re weighing a backyard cottage, a Junior ADU, or a garage-to-apartment conversion, call (903) 342-8977 and we’ll give you a written price before any work starts.
We work in Carrollton every week. We know the lots off Josey Lane, the ranch houses near Rosemeade, the streets around Hebron and Old Denton Road. Reed Calloway leads our crew, and he’s walked enough Carrollton slabs to know what a 1970s foundation will do when you add a kitchen and bathroom on top of it. That matters more than most people think.
Why Fielding ADU Dallas Is Carrollton’s Preferred ADU Builders Company
We’re an independently owned member of the Garrison Partners family, and we’ve held to The Garrison Standard since 2006: show up in the window, put the price in writing, build by the book, leave the site clean, and stand behind the work for a full year. That’s not marketing language. It’s the operating code we follow on every Carrollton project.
Carrollton homeowners call us after a bad experience with another contractor. Missed schedule, price moved at the door, permit board left blank. We hear it repeatedly. Our answer is the written price, handed over before a single nail is driven. The number you approve on day one is the number on the final invoice. No change orders, no “we discovered something” phone call that doubles the cost.
Every crew member on a Carrollton job is background-checked and arrives in uniform. You know exactly who’s on your property. And when you call, a live person answers, 24 hours a day. Not a callback queue. Reed or a member of his team picks up, whether it’s noon or midnight.
We also understand Carrollton’s permitting environment. The city’s accessory dwelling unit ordinance requires owner occupancy on the primary single-family lot. That single rule shapes everything about how we design and permit an ADU here, and we’ll walk you through it before you spend a dollar on drawings.
Key Takeaways
- Detached ADUs in Carrollton run $185,000 – $340,000; garage conversions run $95,000 – $160,000 before permits.
- Carrollton requires owner occupancy on the primary lot, so your ADU must be designed as a secondary structure, not a rentable investment.
- Most Carrollton homes sit on expansive clay soil over slab foundations. That drives foundation and plumbing decisions early.
- Every project gets a written price first and a 365-day written guarantee called the Done Right Promise.
- Call (903) 342-8977 for a free estimate, including a lot walk and permitting review.
JADU in Carrollton
A JADU, or Junior Accessory Dwelling Unit, is the fastest and least expensive way to add legal living space in Carrollton, typically $75,000 – $120,000 including a kitchenette, bath, and separate entrance. It converts existing square footage inside or attached to your home, which avoids the setback and foundation battles that come with a detached build. On a tight Carrollton lot, that’s often the smartest first move.
What a JADU involves here
Most Carrollton JADUs start as a spare bedroom, a bonus room, or a section of the garage with direct exterior access. We add a small kitchenette, a separate entrance, and a bathroom if needed. The owner-occupancy rule still applies, and the city will check that the unit isn’t being split off as a second standalone rental, so we design it as attached living space with an interior connection unless you specifically want a locked door separation.
Why JADUs work on Carrollton lots
Carrollton’s 1960s – 1980s housing stock often has more interior square footage than people use. A JADU captures that space without triggering the setback variance, party-wall notice, or foundation work that a detached ADU requires. If your lot is narrow or your side yard is tight against a neighbor’s fence, a JADU keeps the project within the existing structure and avoids most of the site access headaches.
ADU Plans in Carrollton
ADU plans in Carrollton are the architectural and engineering drawings that get your project through the city’s review process, and they typically cost $8,000 – $18,000 depending on whether you’re converting a garage or building new from scratch. The plans must reflect Carrollton’s owner-occupancy requirement, foundation details for expansive clay soil, and any overlay district review that applies to your neighborhood.
What a good plan set includes
For a Carrollton ADU, the plan set needs site plans showing setbacks from property lines, structural details for slab or pier-and-beam foundations, plumbing and electrical layouts tied to the existing service, and a clear designation that the unit is accessory to the primary dwelling. If you’re building detached, the plans also need drainage and grading details because Carrollton’s clay soil moves with moisture and a poorly drained foundation will heave.
Why we handle plans in-house
We prepare or coordinate ADU plans specifically for Carrollton’s review process. We know what the city’s plan reviewers flag, what the fire separation requirements are for garage conversions, and how to document the owner-occupancy condition so the permit doesn’t get bounced. That’s the difference between a 4-week review and a 4-month one. Reed Calloway reviews every plan before it’s submitted, and he’s been through enough Carrollton permit cycles to know where the friction points are.
Trusted Brands We Service in Carrollton
We’re fluent with the prefab and modular platforms Carrollton homeowners are already researching: Mighty Buildings, Boxabl, and Plant Prefab among them. For conventional builds, we work with Tuff Shed-style structures and James Hardie siding. The right method depends on your budget and your lot. A prefab shell can cut weeks off a Carrollton build if your site access is straightforward. A panelized system like Dvele works well for garage conversions where the existing slab is sound but the walls need to go up fast. We’ll give you an honest read on which approach fits your property, not which one we prefer to sell.
Common ADU Builders Problems We See in Carrollton Homes
- Slab-on-grade foundation heaving. Carrollton’s expansive clay soil expands and contracts with moisture, and we’ve seen new ADU tie-ins crack within months when the foundation wasn’t designed for it. We test soil conditions and detail footings accordingly.
- 2-inch cast iron sewer laterals. Older Carrollton homes frequently have undersized cast iron waste lines that can’t handle the added load of an ADU bathroom. We sleeve or replace them before the new plumbing connects, and we budget for it up front.
- Work-hour noise violations. Carrollton enforces a work-hour noise ordinance, and on tight lots where saw cutting echoes between houses, a single complaint can trigger a stop-work order. We schedule loud work within permitted hours and notify neighbors before demolition.
- Owner-occupancy permit rejections. We see permit applications denied because the ADU was designed with a full second kitchen, which the city reads as a separate dwelling. We design kitchenettes and entrances that meet the accessory-use definition from the start.
Pricing for ADU Builders in Carrollton, TX
Here’s what we quote in Carrollton, based on real projects: garage conversions run $95,000 – $160,000, detached backyard ADUs run $185,000 – $340,000, JADUs run $75,000 – $120,000, and ADU plan sets run $8,000 – $18,000. Permit fees are separate and vary by scope. Foundation work on expansive clay, sewer lateral replacements, and utility upgrades are the three variables that move a Carrollton quote most. We put every line item in writing before you approve anything. If the scope doesn’t change, the price doesn’t change. Call (903) 342-8977 and Reed will walk your lot, talk through the numbers, and leave you a written quote.
| Project Type | Carrollton Price Range |
|---|---|
| Garage Conversion to ADU | $95,000 – $160,000 |
| Detached Backyard ADU | $185,000 – $340,000 |
| Junior ADU (JADU) | $75,000 – $120,000 |
| ADU Plan Set | $8,000 – $18,000 |
Building on a Tight Carrollton Lot
Carrollton’s older residential streets, especially around Josey Ranch and the historic downtown grid, were laid out before anyone imagined a second dwelling in the back yard. That means narrow side yards, fences within a few feet of where a new foundation will go, and staging constraints that a generic builder quote won’t account for. We do something simple that most contractors skip: we walk the lot with the neighbor’s fence in view. If a new ADU wall will sit close to a property line, we trigger a party-wall notice and talk to the neighbor before we start. That single conversation prevents stop-work orders, disputes, and resentment that follows the project for years.
Access affects the quote because it affects the build method. If a crane can’t reach your back lot for a modular unit, we switch to a panelized approach. If a concrete truck can’t get into the side yard, we hand-place or adjust the foundation design. These are not afterthoughts. They change the cost, the schedule, and what’s even possible. We price them up front, in writing.
How Carrollton’s Owner-Occupancy Rule Shapes Every ADU We Design
Carrollton requires the property owner to live on the primary single-family lot for an ADU to be permitted. That changes the entire design conversation. The ADU is not a standalone rental investment; it’s a secondary structure attached to your primary residence. Practically, that means we design kitchenettes that meet the accessory-use standard, not full second kitchens that the city will read as a separate dwelling unit. It means the entrance is positioned as a distinct but secondary access point, not a separate address. And it means every plan we submit to the city explicitly documents the owner-occupancy condition. We’ve had homeowners come to us with plans they paid another designer to draw, only to have the permit rejected because the unit was designed as a rentable apartment. We fix that before it becomes a rejection letter.
On a 1970s ranch street near Josey Ranch, our crew converted a detached two-car garage into a 480-square-foot ADU using a Dvele panelized shell. The existing concrete slab had a 2-inch cast iron sewer lateral that we sleeved in-place to meet current code before adding the bathroom, and we coordinated a party-wall notice with the neighbor whose fence sat just 18 inches from the new side wall. That project is the best example of what Carrollton ADU work actually looks like: legacy pipes, close neighbors, a slab that’s been moving for 50 years, and a permitting framework that demands the work be designed as accessory, not investment. If you’re searching for ADU Builders who understand that reality, you’ve found them.
We Also Serve Cities Near Carrollton
We build ADUs across the north Dallas suburbs, including Coppell, Grapevine, Irving, and Dallas itself. If you’re in a neighboring city and want the same written-price, written-guarantee approach, call the same number. And if you’re reading this from inside Carrollton, read more on our Carrollton page for neighborhood-specific detail.
Serving Carrollton, TX - Our Local Coverage Area
We’re based in the Carrollton 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 About ADU Builders in Carrollton
It means the ADU must be designed as an accessory structure to your primary home, not as a separate rentable dwelling. We place the kitchenette and entrance to meet the accessory-use standard, and we document owner occupancy in the permit package. Call (903) 342-8977 if you’re unsure whether your property qualifies.
Often, yes, but the existing slab has to be evaluated for thickness, reinforcing, and soil movement under Carrollton’s expansive clay conditions. Some slabs can carry a panelized build; others need piers or a new foundation. We’ll tell you which one applies to your patio before you commit to anything.
If any new construction, excavation, or foundation work happens within a few feet of a neighbor’s property line or existing structure, yes. We handle the notice and the conversation professionally. It avoids stop-work orders and keeps the project moving. Call (903) 342-8977 with your lot dimensions and we’ll tell you if a notice applies.
Tight lots change access, staging, and sometimes the build method entirely. If a crane can’t reach the back yard, we use a panelized or stick-build approach. If a concrete truck can’t get to the foundation site, we adjust the pour method. These decisions are priced up front, not discovered mid-project.
The historic downtown Carrollton area has additional review layers that can affect setbacks, materials, and design language. Some older neighborhoods also carry specific plat restrictions. We check the overlay and plat requirements for your specific address before we draw the first plan. Call (903) 342-8977 and we’ll pull the records for your lot.
Call Fielding ADU Dallas for Your Carrollton ADU
You’re not shopping for the cheapest bid. You’re shopping for the builder who shows up, prices honestly, and finishes clean. That’s what we do in Carrollton, and we put it in writing. Every project gets the 365-Day Done Right Promise: if the work fails within a year, we return and correct it at no charge. Every project gets a written price before any work starts. And every call gets a live person, 24 hours a day. Call (903) 342-8977 and schedule a free estimate. Reed Calloway will answer your questions straight and leave you a written quote you can hold him to.
Written by Reed Calloway, Owner at Fielding ADU Dallas, serving Carrollton and the north Dallas suburbs.
