A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Irving, TX
Fielding ADU Builders handles accessory dwelling units, garage conversions, and room additions across Irving, TX. Most homes here were built between the 1950s and 1970s with slab foundations, detached garages, and clay-heavy soil that shifts with the seasons. That changes how we design foundations, run utilities, and handle drainage. If you’re planning an ADU in Irving, call (903) 342-8977 and we’ll give you a written price before any work starts.
Why Irving Homes Are Different
Irving’s housing stock leans heavily toward mid-century brick ranch homes on deep lots, especially in the Heritage District and Hospital District. Many of those detached garages were built with alley access and existing electrical service, which makes them strong candidates for conversion under the city’s accessory structure rules. The lots are deep enough for a backyard ADU in many cases, but setbacks and deed restrictions in older neighborhoods often require a variance before you can build. That’s the city’s written permission to build closer to the property line than the standard rule allows, and we handle that paperwork as part of the job.
The climate matters too. Summers in Irving are hot and humid, and storm season brings hail and high winds. Any detached ADU needs an HVAC system sized for the heat load, impact-resistant roofing, and drainage that holds up in clay soil that expands and contracts. We’ve seen slab movement on older Irving properties, so we evaluate the soil and existing foundation before we recommend a detached structure versus an attached addition. The Garrison Code applies to every job: show up in the window, price in writing, by the book, leave it clean, stand behind it for a year.
Our Main Irving Services
These are the three jobs Irving homeowners call about most. Each has its own page with pricing and specifics.
Room Addition Contractor in Irving
A room addition in Irving usually starts with matching the existing brick or siding on a 1960s ranch and tying the new slab into the old one properly. Clay soil movement makes that connection point critical, and we’ve seen additions fail there when the footing wasn’t engineered for local conditions. We pull permits, handle the foundation work, and finish the exterior so it doesn’t look added on. Full details on our Room Addition Contractor in Irving page.
Garage Conversion Contractor in Irving
Many Irving garages were built with alley access and already have electrical panels, which cuts the cost and timeline of a conversion. The work involves insulating the walls, adding HVAC, upgrading the slab if needed, and tying the converted space into the main house’s systems. In the Heritage District especially, those detached garages are prime candidates because the city’s accessory structure rules treat them favorably. See our Garage Conversion Contractor in Irving page for full pricing.
ADU Builders in Irving
A backyard ADU in Irving works best on the deeper lots in the older central neighborhoods, with attention paid to setbacks, storm drainage, and foundation design in expansive clay. We build both prefab and conventional ADUs, and we’ll tell you honestly which method fits your lot and budget before we write the price. If you’re weighing a detached unit against a garage conversion, our ADU Builders in Irving page breaks the costs down line by line.
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.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in Irving
We install and service ADUs built on Mighty Buildings, Boxabl, and Plant Prefab platforms, along with conventional builds using James Hardie siding and Tuff Shed structures. Parts for these systems are stocked at our Dallas-Fort Worth office and arrive on Irving job sites quickly. See our brands for the full list.
Pricing for ADU Company in Irving, TX
| Service | Typical range in Irving |
|---|---|
| Detached ADU (prefab, 400 sq ft) | $120,000 – $180,000 |
| Detached ADU (prefab, 800 sq ft) | $180,000 – $260,000 |
| Detached ADU (conventional, 400 sq ft) | $150,000 – $220,000 |
| Detached ADU (conventional, 800 sq ft) | $220,000 – $320,000 |
| Garage conversion (attached, 400 sq ft) | $70,000 – $110,000 |
| Garage conversion (detached, 400 sq ft) | $90,000 – $140,000 |
| Room addition (400 sq ft, ground level) | $110,000 – $160,000 |
| Room addition (600 sq ft, ground level) | $150,000 – $210,000 |
| Room addition (second story, 400 sq ft) | $160,000 – $230,000 |
| Foundation work (repair or new slab) | $8,000 – $30,000 |
| HVAC for new space (installed) | $6,000 – $14,000 |
| Utility connections (water, sewer, electrical) | $5,000 – $18,000 |
What pushes the number up in Irving: clay soil that requires a deeper or reinforced footing, storm-hardening on the roof, and setback variances in older neighborhoods. What doesn’t change: the price we put in writing before work starts is the price on the final invoice.
Neighborhoods We Serve in Irving
We work across all of Irving, from the older central neighborhoods to the newer subdivisions on the north and south ends. Most job sites are within a 20 to 30 minute drive of our Dallas-Fort Worth office.
- Heritage District
- Hospital District
- Valley Ranch
- Las Colinas
- North Irving
Service Area – Cities Near Irving
Fielding ADU Builders covers Irving and the surrounding metro. If your property is in a nearby city, you’ll get the same written-price-first policy and the same one-year Garrison Standard guarantee. We also serve Dallas, TX, Hutchins, TX, Mesquite, TX, and Lancaster, TX.
Serving Irving, TX - Our Local Coverage Area
We’re based in the Irving 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 Company in Irving
We schedule estimates across Irving weekly and can usually get to your property within a few days of your call. Call (903) 342-8977 and we’ll set a date. The estimate is free and the price goes in writing before any work begins.
Yes. We prepare the permit drawings, handle the city submittal, and work through HOA reviews where they apply. Older Irving neighborhoods often have deed restrictions on detached structures, and we’ll tell you early if a setback variance is needed.
Maybe. We evaluate the existing slab or footings before we write a price. In many Irving homes built in the 1950s and 1960s, the slab is sound but the new structure needs a reinforced footing to handle soil movement. If that’s your situation, it’s a line item in the written quote, not a surprise later.
Call (903) 342-8977 to schedule your free estimate. We’ll walk the property, answer your questions, and put the price in writing before any work starts.
What happens when you call
- 1A real person answersNo phone trees - talk to a local adu pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Irving Customers Say
"Garage conversion with a new bath and kitchenette. Permit was handled by them. Inspection passed first time."
- Sheila B."Built a detached ADU behind our house. The builder is a veteran and runs the site like a platoon: schedule posted, crew on time, everything labeled. Finished within a few days of the date."
- Ken W."Room addition over the back patio. Framing is square, windows are tight, and the roofline matches."
- Danny L.
