A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateFast, Reliable Room Addition Contractor Across Carrollton
Room additions in Carrollton typically run $180 – $320 per square foot before permit fees, with a standard 12×16 bedroom addition landing between $55,000 and $90,000 depending on foundation work, sewer line condition, and whether the city requires a full ADU fire separation. We work across Carrollton’s established neighborhoods, from the ranch-style streets around Josey Ranch to the older lots near downtown, and we know what the city’s owner-occupancy ordinance means for your plans before you spend a dollar on drawings. Call (903) 342-8977 and we’ll walk you through what’s realistic on your lot.
Reed Calloway leads our Carrollton work, and he’s walked enough of these 1960s and 1970s slabs to tell you up front where the money goes. Our Room Addition Contractor team handles everything from a simple bedroom bump-out to a full in-law suite with its own entrance, and we serve Carrollton homeowners directly from the Dallas-Fort Worth office.
Why Fielding ADU Dallas Is Carrollton’s Preferred Room Addition Contractor Company
Carrollton homeowners call us after they’ve been burned: the bid that doubled at the door, the crew that stopped answering, the permit board that stayed blank. Our answer is a written price before any work starts, handed to you before a single nail is driven. The number you approve on day one is the number on the final invoice. No change orders slipped in, no “unforeseen conditions” surprises after the slab is open.
Every crew member on a Carrollton job is background-checked and arrives in uniform, so you know exactly who’s on your property. And when you call, a live person answers. Twenty-four hours a day, seven days a week, no voicemail, no callback queue. That matters when you’re mid-remodel and something needs attention at 9 p.m.
We hold ourselves to The Garrison Standard, which means permitted work done by the book, a clean site every day, and a written one-year guarantee on every project. If something fails inside that year, we return at no charge and correct the defect. The Garrison Code is not a slogan; it’s how we operate: show up in the window, price in writing, by the book, leave it clean, stand behind it for a year.
Sunroom Builders in Carrollton
Sunroom Builders in Carrollton work with a specific reality: many of these lots already have a covered patio or a slab that was poured decades ago, and the question is whether that slab can carry a new room or needs to be saw-cut and re-poured. A sunroom addition in Carrollton typically runs $28,000 – $55,000 depending on whether you’re enclosing an existing covered patio or building new from the footing up, and whether the city classifies it as a room addition or an attached ADU.
Enclosing an Existing Covered Patio
This is the most common sunroom project we do in Carrollton, especially in the ranch-home neighborhoods around Josey Ranch. The framing goes up fast, but the real work is underneath: running electrical through the old slab edge, checking the existing roofline for proper tie-in, and making sure the new room’s HVAC is sized for a Texas summer. On a recent job near Josey Ranch, our crew converted a covered patio into a sunroom and in-law suite. We saw-cut the old slab to run 4-inch ABS from the existing 2-inch cast iron sewer, sleeved the line under the new footing to meet code, and staged all materials on the driveway because the backyard access was only 4 feet wide. The homeowner stayed in place the whole time, and we kept dust down with a negative-air scrubber and daily magnet sweeps.
Building a New Sunroom From the Footing Up
When there’s no existing slab, we’re working with Carrollton’s expansive clay soil. That means piers or a properly engineered slab with rebar sized for movement, because a shallow slab on this soil cracks at the connection point to the main house within the first wet-dry cycle. We plan for that on day one, not after the drywall is up.
Room Additions in Carrollton
Room Additions in Carrollton fall into two camps: attached additions that extend the main house footprint, and detached structures in the backyard. A primary bedroom suite addition runs $65,000 – $110,000 on most Carrollton lots, while an attached family room or home office addition runs $45,000 – $80,000. Detached additions with a bathroom and kitchenette start around $90,000 because of the sewer, electrical, and foundation work involved.
Attached Bedroom or Family Room Additions
On a tight Carrollton lot, an attached addition has to work around side-yard setbacks and existing utility lines. If your lot has only a 4-foot side yard, staging and access change the quote. We plan material delivery and crew parking before we start, because a dumpster that blocks your neighbor’s driveway turns a smooth job into a dispute. The city’s noise and work-hour ordinances apply, and we respect them on every job.
Detached In-Law Suites and ADUs
Carrollton’s ADU ordinance requires owner occupancy on single-family lots, which means any detached addition with a kitchenette and separate entrance has to be legally firewalled and permitted as an ADU, not just a bonus room. That changes egress, HVAC sizing, and utility metering requirements from the start. We handle the owner-occupancy affidavit, the fire separation, and the permit path, so you don’t get red-tagged mid-build. We’re also fluent with the prefab platforms homeowners research on their own: Abodu, Plant Prefab, and Dvele for modular builds, plus conventional construction with James Hardie siding and Tuff Shed-style structures for budget-conscious additions.
Trusted Brands We Service in Carrollton
We work with the materials and platforms Carrollton homeowners already know. Abodu and Plant Prefab for modular ADUs that go up in weeks, not months. James Hardie fiber cement siding for exteriors that stand up to Texas heat and the occasional ice storm. Tuff Shed-style structures when a simpler, budget-friendly addition makes sense. Because we’ve built with all of them, we can match the right build method to your lot access, your foundation condition, and your budget without pushing you toward a one-size-fits-all answer. We keep relationships with local Carrollton suppliers, which means shorter lead times on windows, doors, and framing packages when we’re mid-project.
Common Room Addition Contractor Problems We See in Carrollton Homes
- 2-inch cast iron sewer lines failing inspection. Older Carrollton homes often have 2-inch cast iron sewer lines that fail under current code. A “simple” bathroom addition turns into a full sewer replacement after demo, and you need to know that before the walls come down.
- Owner-occupancy violations on ADU-style additions. A contractor builds a room addition with a kitchenette and separate entrance, then the city red-tags it because it’s functionally an ADU without the required owner-occupancy affidavit and fire separation. We pull the right permit class from day one.
- Clay soil movement cracking new slabs. Carrollton’s expansive clay shrinks and swells through wet-dry cycles. A detached room addition on a shallow slab without proper piers will crack at the connection point to the main house. We design foundations for this soil, not for a generic Texas lot.
- Tight lot access derailing the schedule. A 4-foot side yard means no room for a skid steer, no staging area, and a dumpster that has to sit somewhere specific. We plan access before we price the job, because access affects the quote.
Pricing for Room Addition Contractor in Carrollton, TX
Here’s what we tell Carrollton homeowners who call asking for numbers. An attached room addition runs $180 – $250 per square foot when there’s no major sewer or foundation work. A detached ADU runs $220 – $320 per square foot because of the separate foundation, utility trenching, and fire separation required by Carrollton’s owner-occupancy ordinance. A sunroom enclosure over an existing patio runs $28,000 – $55,000. Permit fees run $2,000 – $6,000 depending on scope, and we pull them ourselves. The two biggest cost movers are the condition of your existing sewer line and whether your lot requires engineered foundation work for clay soil movement. Call (903) 342-8977 for a written estimate. It’s free, and the number we give you is the number you’ll pay.
We Also Serve Cities Near Carrollton
Our Room Addition Contractor in Carrollton work puts us near homeowners in Coppell, Grapevine, Dallas, and Irving on a regular basis. If you’re in one of those cities and need a room addition or ADU with written pricing and a one-year guarantee, call (903) 342-8977 and we’ll schedule a site visit.
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 Room Addition Contractor in Carrollton
Yes. If the addition has a separate entrance, a bathroom, and a kitchenette, Carrollton’s ADU ordinance treats it as an accessory dwelling unit on single-family lots, and the property owner must sign an owner-occupancy affidavit and provide the required fire separation. Call (903) 342-8977 and we’ll tell you whether your project falls under the ADU rules or the standard room addition rules before you spend money on plans.
We plan access first. A 4-foot side yard means no skid steer, no wide staging area, and a dumpster that has to sit in a specific spot or be swapped out more often. We price the job accordingly, stage materials on the driveway, and keep the site clean daily so your 4-foot side yard doesn’t become your neighbor’s headache. Call (903) 342-8977 for an estimate that accounts for real access on your lot.
In a 1970s Carrollton home, the existing sewer line is likely 2-inch cast iron, and current code requires 4-inch for new bathroom additions. You’ll either replace the line or sleeve it under the new footing, which adds $4,000 – $12,000 to the job depending on the run length and how much slab has to be opened. We inspect the line before we price the job so this isn’t a surprise after demo. Call (903) 342-8977 to schedule an inspection.
Carrollton restricts construction noise during evening and overnight hours, and our crews work within those windows on every job. We also keep dust down with negative-air scrubbers and daily magnet sweeps, which matters when your neighbor’s driveway is 10 feet from our staging area. If you have an HOA with stricter rules, we’ll follow those too. Call (903) 342-8977 and we’ll walk you through what applies to your street.
For an attached addition that shares a wall with your main house, you don’t need a party-wall agreement; that requirement applies to walls shared between separate properties. But on a tight Carrollton lot where your addition comes close to the property line, the city may require a setback variance, which is the city’s written permission to build closer to the line than the standard rule allows. We handle that paperwork. Call (903) 342-8977 and we’ll review your survey and tell you what permits and variances apply.
Written by Reed Calloway, Owner at Fielding ADU Dallas, serving Carrollton homeowners with room additions, sunrooms, and ADUs built to The Garrison Standard.
