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 Dallas
Building an accessory dwelling unit in Dallas means navigating a tangle of city codes, county overlays, and neighborhood-specific zoning rules that most contractors never mention until the permit gets rejected. That’s where we come in. Lodgewick ADU Dallas builds detached ADUs, garage conversions, and custom additions across Dallas, and we start every project by mapping the exact code path for your specific lot, so your first estimate reflects what will actually pass plan review. Call (361) 204-4652 to get a written price before any work begins.
Why Lodgewick ADU Dallas Is Dallas’s Preferred ADU Builders Company
We’re the ADU company of the Kingswell family, building accessory dwellings in Dallas since 2010. Our reputation in Dallas comes from doing the unglamorous work well: pulling the right permits, scheduling inspections honestly, and keeping the job site clean. Dallas homeowners who’ve been through a bad remodel know the difference between a contractor who guesses and one who puts it in writing.
Every Dallas project operates under The Kingswell Guarantee. That means a written price before work starts, a defined arrival window, a clean job site, and a written guarantee on every build. If something isn’t right within 365 days, we come back and make it right, free of charge. That’s the 365-Day Done Right Promise, and it’s delivered in writing on every project, not just talked about in a sales pitch.
Russ Delmar leads our Dallas team. When you call, a live person answers, 24 hours a day, seven days a week. Not a voicemail loop, not a chatbot. You’ll get an actual human who knows what an ADU project in Dallas involves and can schedule your free estimate.
ADU Construction in Dallas
ADU construction in Dallas is a different animal depending on whether your lot sits inside the City of Dallas proper or in one of the surrounding municipalities. Dallas sits in a patchwork of over 30 municipalities and special districts with different ADU codes, so what’s buildable in a Dallas County enclave like Cockrell Hill can be illegal a mile away in the City of Dallas, where ADUs are still largely restricted to specific older neighborhoods and require parking offsets. That’s not a detail you want to discover after you’ve paid for plans.
A typical custom ADU construction project in Dallas runs $180,000 to $380,000 for a 600 to 900 square foot detached unit on a standard city lot. That range covers foundation work, framing, electrical, plumbing, HVAC, drywall, and finishes. The spread comes down to site conditions, finish level, and which code path your lot falls under.
What the build actually involves
We start with a lot survey and a code review tied to your exact zoning district. Then we lock the scope and price in writing. Only after you approve the written line-item quote do we pull permits and start moving dirt. No change orders at the door, no “we discovered a problem” price jumps mid-project.
Permits and plan review
Dallas Water Utilities and the fire marshal each have separate plan review stops that can add six to ten weeks if your lot is in a floodplain or far from a hydrant. We map those stops early so your timeline is real, not optimistic.
Detached ADU in Dallas
A detached ADU in Dallas is a separate structure from your main house, typically 400 to 1,000 square feet, built in the rear yard or off an alley. These are the most common ADU type we build in Dallas, and they’re where the zoning rules bite hardest. Many East Dallas neighborhoods have a 10-foot rear setback that kills standard 16×20 plans on 50×130 lots.
Detached ADU projects in Dallas generally run $160,000 to $350,000 depending on size, site access, and utility routing. A studio detached ADU in Dallas, around 400 square feet, typically sits at the lower end: $130,000 to $200,000. A two-bedroom detached ADU with a full kitchen and bath can push past $300,000 once you factor in upgraded electrical service and a separate sewer lateral.
Foundation realities in older Dallas neighborhoods
Starting foundation work before confirming the existing sewer lateral’s depth is a mistake we see too often. Older Dallas neighborhoods like Oak Cliff often have clay tile laterals at four feet, which forces either a deeper slab step-down or a macerating pump for a separate ADU bathroom. We check this before we quote, not after we dig.
Alley-load versus street-load parking
Dallas parking requirements differ depending on whether your ADU faces an alley or the street. Alley-load lots often need an additional on-site parking space, while street-load lots can sometimes meet the offset requirement with existing driveway footage. We run this against your specific Dallas zoning district before we lock your price.
Trusted Brands We Service in Dallas
We work hands-on with several established prefab and materials brands, including Plant Prefab, Tuff Shed, and James Hardie. For Dallas customers, that means we know the lead times, the attachment details, and the inspection quirks for each system. Our crew just framed a 620 sq ft detached ADU off a rebuilt alley-access lot in Dallas’s Vickery Meadow neighborhood using a Plant Prefab wall system, which cut on-site framing from three weeks to five days. The existing garage slab failed its inspection for slab-on-grade suitability, so we doweled a new thickened-edge footing at an eight-inch step-down to keep the eave height under the 18-foot limit set by the Dallas Development Code. That’s the kind of site-specific problem solving that keeps a Dallas ADU on schedule.
Common ADU Builders Problems We See in Dallas Homes
- Assumed the city permit was the only approval. Dallas Water Utilities and the fire marshal each have separate plan review stops. If your lot is in a floodplain or far from a hydrant, those reviews can add six to ten weeks to your timeline.
- Bid the project without checking the rear-yard setback. Many East Dallas neighborhoods have a 10-foot rear setback that kills standard detached ADU plans on 50×130 lots. We verify the setback against your specific zoning district before we quote.
- Started foundation work before checking the sewer lateral depth. Older Dallas neighborhoods like Oak Cliff often have clay tile laterals at four feet. That forces either a deeper slab or a macerating pump, which changes the bid.
- Ignored the floodplain overlay. Lakewood and other pockets near White Rock Creek sit in FEMA flood zones. Building in a floodplain in Dallas triggers civil engineering review, floodproofing requirements, and a higher foundation, all of which shift the budget meaningfully.
Pricing for ADU Builders in Dallas, TX
Detached ADU projects in Dallas run $160,000 to $350,000. Custom built ADUs start around $180,000 for a 600 square foot one-bedroom and climb from there. Studio ADUs, roughly 400 square feet, land between $130,000 and $200,000. Prefab and modular ADU installations in Dallas typically run $140,000 to $280,000, with the lower end reflecting factory-built panels and a shorter on-site framing schedule. Junior ADUs (JADUs), which convert existing interior space like a garage or basement into a small unit under 500 square feet, run $60,000 to $140,000 in Dallas.
What moves the number: the floodplain overlay, the sewer lateral depth, the parking offset requirement, and whether your lot is in the City of Dallas proper or a county enclave with different rules. Call (361) 204-4652 for a free estimate, and we’ll give you a written line-item price specific to your Dallas property before you commit to anything.
We Also Serve Cities Near Dallas
While this page focuses on Dallas, our team also handles ADU projects in Duncanville, Balch Springs, Addison, and Grand Prairie. The code paths differ in each municipality, so if your lot sits in one of those cities, give us a call and we’ll map it the same way we do for our Dallas customers. You can also learn more about our overall approach on our ADU Builders hub page.
Serving Dallas, TX - Our Local Coverage Area
We’re based in the Dallas 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 Dallas
In Winnetka Heights, a historic district in North Oak Cliff, the City of Dallas requires one additional off-street parking space for an ADU unless the lot qualifies for an offset. Alley-load lots fare better here because existing driveway access counts toward the requirement. Street-load lots often need a new parking pad, which adds $4,000 to $9,000 to the project. Call (361) 204-4652 and we’ll check your specific lot against the current parking standards before you spend a dime on plans.
Yes, a detached ADU in Dallas needs its own address assigned by the city’s addressing office, and it needs a separate electrical service or a sub-panel with load-level billing. Water service can be sub-metered from the main house in some districts, but Dallas Water Utilities requires a separate tap if the ADU exceeds 750 square feet or has more than one bedroom. We handle all of this through plan review so your final quote includes the meter and addressing costs up front.
Sixty to one hundred twenty days from permit submission to certificate of occupancy, assuming no floodplain review. The plan review itself runs four to ten weeks depending on the district and whether Dallas Water Utilities or the fire marshal flags your lot. Construction on a standard 600 square foot detached ADU in Dallas takes four to six months once the permit is issued. We put the calendar in writing with your quote so you know what to expect.
Building an ADU on a Lakewood lot inside the FEMA floodplain triggers a full civil engineering review from the City of Dallas. That means floodproofing measures, a higher finished floor elevation, and possibly a raised foundation. The added engineering typically runs $15,000 to $40,000, and the plan review adds six to ten weeks. We identify whether your lot is in the floodplain on the first call, so the number you get is the number you’ll actually pay.
A full civil engineering review in Dallas is triggered by three main conditions: the lot sits in a FEMA floodplain, the lot has existing drainage or erosion issues, or the proposed ADU changes the impervious surface coverage beyond the zoning district’s limit. That review adds four to eight weeks to plan approval and ranges from $10,000 to $40,000 in engineering fees depending on the scope. We identify these triggers during our initial site walk so your written price accounts for them from day one. Call (361) 204-4652 to schedule your free estimate.
Written by Russ Delmar, Owner at Lodgewick ADU Dallas, building accessory dwelling units in Dallas since 2010 under The Kingswell Guarantee.
