A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Plano, TX
An accessory dwelling unit, or ADU, is a small, fully independent home built on the same lot as your main house. In Plano, we mostly build them as backyard cottages, garage conversions, and attached additions that give families extra space without giving up the neighborhood they already love. Plano’s lot sizes and alley-loaded streets make many backyards workable for a detached unit, but every site has its own setbacks, easements, and HOA rules to check before we price anything. If you’re thinking about one, call home base at (361) 204-4652 and we’ll walk you through what your specific lot can actually support.
Why Plano Homes Are Different
Plano’s housing stock runs from 1970s ranch-style neighborhoods east of US-75 to newer master-planned communities west of the Dallas North Tollway. That spread matters because the age of your home changes how we tie a new ADU into your existing electrical panel, foundation, and roofline. Older homes in areas like Kings Ridge or the original downtown grid often need a panel upgrade or a subpanel run to the new unit, while newer builds in neighborhoods like Willow Bend or Whiffletree tend to have more service capacity to spare. The soil here is also part of the picture. Plano sits on expansive clay that shrinks and swells with North Texas heat and the occasional heavy rain, so detached ADUs on new foundations need a soil report and proper pier or slab design. That’s standard practice for us, not an upsell. HOA approval is another common step in Plano, particularly in deed-restricted communities, and we’ll help you put together the site plan and elevations most HOAs want to see before they’ll sign off. Climate matters too: a Plano summer can sit above 100 degrees for weeks, which means the ADU’s insulation, HVAC sizing, and window placement have to be right from the start, because cutting corners there shows up as a $400 electric bill in August.
Our Main Plano Services
Most Plano homeowners who call us are weighing one of three paths to more space. Here’s how each one works in this city, with a link to the full page for the one you’re considering.
Home Addition Contractor in Plano
A home addition extends your existing house rather than building separately, which in Plano often means a new primary suite, a family room bump-out, or a second-story addition over a one-story ranch. These jobs are governed by your home’s existing foundation and roofline, and on Plano’s clay soil we typically recommend a foundation inspection before committing to a design. If you want the new space to flow directly from your current floor plan, this is usually the better route than a detached ADU. See Home Addition Contractor in Plano for full pricing and the permit process.
Garage Conversion Contractor in Plano
A garage conversion turns an existing attached or detached garage into living space, which is often the most cost-effective way to add a rental unit or in-law suite in Plano. Many Plano homes built in the 1980s and 1990s have oversized two-car garages that convert well, but the garage slab may need leveling or a moisture barrier before flooring goes down. We also check whether your HOA has rules about converting a garage when it removes covered parking. Read Garage Conversion Contractor in Plano for specifics on cost and what the city requires.
ADU Builders in Plano
A detached ADU is a separate small house in your backyard, usually 400 to 1,200 square feet, with its own entrance, kitchen, bath, and address. In Plano, detached units work especially well on larger lots east of Coit Road and in neighborhoods where backyards back up to alleys rather than neighboring homes. We handle the full build: site work, foundation, utilities, the structure itself, and the final finishes. The full breakdown of floor plans, prefab options, and Plano-specific build costs is on ADU Builders in Plano.
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 Plano
We work with several ADU and materials brands that fit Plano lots well. Our brands include Boxabl, Plant Prefab, Tuff Shed, and James Hardie, among others. Because we know these systems, we can match a specific manufacturer to your lot size, budget, and HOA constraints instead of forcing one approach. Turnaround on prefab panels and kits in the Plano area is typically faster than stick-built framing, but we’ll give you a straight comparison before you choose.
Pricing for ADU Company in Plano, TX
| Service | Typical range in Plano |
|---|---|
| Detached ADU (400 – 600 sq ft, prefab shell) | $120,000 – $190,000 |
| Detached ADU (custom stick-built, 600 – 900 sq ft) | $220,000 – $340,000 |
| Garage conversion (single-car, attached) | $85,000 – $135,000 |
| Garage conversion (two-car, detached) | $130,000 – $200,000 |
| Second-story addition (400 – 600 sq ft) | $180,000 – $275,000 |
| Ground-floor addition (300 – 500 sq ft) | $110,000 – $185,000 |
| Foundation repair before ADU build (pier work) | $8,000 – $22,000 |
| Electrical panel upgrade (100A to 200A) | $3,500 – $6,500 |
| HOA site plan and submittal package | $1,200 – $2,800 |
| Soil report and foundation engineering | $1,800 – $3,500 |
What pushes a Plano ADU toward the higher end is usually a combination of clay-soil foundation work, a longer utility trench from the street or alley, and HOA-required design changes like certain siding materials or roof pitches. Whatever the scope, our written price comes before any work starts, and that price doesn’t move once you sign.
Neighborhoods We Serve in Plano
We build across the full city, from the older central neighborhoods to the newer developments on the west and north sides. Representative areas include:
- Kings Ridge
- Willow Bend
- Whiffletree
- Downtown Plano / Old Towne
- Red Haw
Most Plano sites are reachable from our Dallas-Fort Worth coordination office within about 45 to 60 minutes, and we schedule site visits in writing with a real arrival window so you’re not waiting around all day.
Service Area – Cities Near Plano
We also serve homeowners just outside Plano in Richardson, TX, Addison, TX, Garland, TX, and Rowlett, TX. If you live in one of those communities and are weighing an ADU or addition, the same written-price and written-guarantee approach applies.
Serving Plano, TX - Our Local Coverage Area
We’re based in the Plano 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 Plano
We typically schedule Plano site visits within three to five business days, depending on the season. Each visit is confirmed with a defined arrival window in writing, and our crews show up in that window. Call (361) 204-4652 to get on the calendar.
In many deed-restricted Plano neighborhoods, yes. Most HOAs want a site plan, elevations, and a description of materials before they’ll approve a detached ADU or garage conversion. We prepare the submittal package for you, and we’ve worked with HOAs across the city, including newer communities west of the Tollway.
The city of Plano reviews ADU and addition plans through its building department, and straightforward residential permits generally clear in a few weeks. Delays most often come from incomplete submittals, so we front-load the drawings, engineering, and HOA paperwork to avoid back-and-forth. We pull permits on every project, and inspections are part of the build schedule.
If you’re ready to get real numbers for your Plano property, call us at (361) 204-4652. We’ll come out, look at your lot, and give you a written price and scope before you commit to anything. No pressure, no surprises.
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 Plano Customers Say
"I was nervous about adding on but they walked me through every step and every cost before we started. No surprise change orders halfway through like I'd heard horror stories about."
- Eleanor Pratt"Garage conversion into an office and guest room. Fair written price, finished close to on schedule, and they fixed a small drywall crack under warranty months later without any hassle."
- Diana Cho"Solid build on a home addition. The permit stage dragged, which held things up a few weeks. They were upfront it was out of their hands and the construction itself moved fast and clean."
- Douglas Fenwick
