# Garage Conversion & ADU in Pflugerville, TX: 2026 Costs

By the Home Remodel Pro team · published 2026-10-11 · Garage Conversion & ADU, Pflugerville

In Pflugerville, converting an attached garage into finished living space typically runs $75,000–$130,000, and building a detached ADU in the back yard typically runs $180,000–$350,000+ depending on size and finish. Both are design-build jobs: drawings, engineering and permitting come first, then roughly 12–20 weeks of construction for a conversion and 5–8 months for a detached unit. We give you a fixed price in writing before anyone swings a hammer.

## What a garage conversion or ADU costs in Pflugerville

Two very different projects get lumped under the same search. A garage conversion reuses a slab, walls and roof you already own, so you are paying for insulation, framing, windows, HVAC, electrical, plumbing if you add a bath, flooring and finishes. A detached ADU is a small house: foundation, framing, roof, exterior cladding, a full kitchen and bath, and separate utility runs from the main house or the street.

Here is how we see the ranges fall in the Pflugerville and Greater Austin market. Every number below is a range we price against, not a quote — your fixed price comes after we measure, draw and scope the work.

Finishes move the number, but site conditions move it more. A conversion with no plumbing and a mini-split sits at the bottom of its range. The same garage with a full bathroom, a wet bar, a new electrical subpanel and a sewer tie-in sits at the top. For detached units, the distance from the house to the new build drives trenching for water, sewer, gas and power — a unit 20 feet off the back of the house costs less to connect than one tucked into the far corner of the lot.

- Garage conversion, no new plumbing (office, bedroom, media room, gym): $75,000–$100,000
- Garage conversion with a full bath and a small kitchenette: $95,000–$130,000
- Detached ADU, 400–600 sq ft, one bed/one bath: $180,000–$260,000
- Detached ADU, 700–900 sq ft, two bed or high-end finish: $260,000–$350,000+
- Moves the price up: long utility trenches, a new electrical service, custom cabinetry, a second story, a raised foundation on sloped ground, replacing the garage door opening with a window-and-wall assembly in brick or stone
- Moves the price down: keeping the existing slab elevation and roofline, a simple rectangular floor plan, stock cabinetry, one HVAC zone on a ducted mini-split, no gas appliances

## What is particular about this work in Pflugerville

Most of the Pflugerville housing stock we work in was built from the mid-1990s onward, with a heavy concentration of 2000s and 2010s subdivisions. That is good news and bad news. The good news: slabs are relatively young, wiring is modern, and attached two-car garages are usually a clean rectangle, which makes for an efficient conversion. The bad news: these neighborhoods almost always carry an HOA, and many have architectural review rules about what the front elevation can look like and whether a detached building is allowed in the rear yard. Read your covenants before you spend money on drawings. We will tell you what the drawings need to show, but the HOA approval is between you and your association.

The slab is the other Pflugerville-specific item. Garage slabs are typically poured lower than the house slab and sloped toward the door for drainage. Converting one means leveling the floor — usually a self-leveling pour or a framed and insulated subfloor — so the finished room meets the house without a step. Budget for it; it is in every conversion we price here.

Central Texas clay soils expand and contract hard between a wet spring and a dry August, which is why a detached ADU foundation gets designed by a licensed engineer rather than guessed at. A licensed engineer and the permit office decide what the foundation and framing have to be; we build to what they stamp. The climate also shapes the mechanical plan: a converted garage has a west- or south-facing wall that used to be a steel door and sees full afternoon sun, so we insulate that wall and the attic above it properly and size cooling for the real load instead of tapping into the main house system and hoping.

## Permits and inspections, handled

Pflugerville addresses are generally in the City of Pflugerville's jurisdiction, with some surrounding properties falling under Travis County. Neither one is the City of Austin, and the submittal requirements are not identical. Part of our scope is identifying which office has jurisdiction over your address, preparing the submittal, filing it, and carrying it through plan review, revisions and inspections. You do not chase it; we do. We handle City of Austin permits the same way for our Austin clients.

Assume a permit is required and assume the plans will need to show a site plan, floor plan, elevations, an energy compliance path and engineering for a new foundation. Whether a detached unit is allowed on your lot, how far it has to sit from property lines, how tall it can be and how much of the lot can be covered are decisions the permit office makes against the zoning that applies to your address — not something a contractor should promise you over the phone. We run that question first, before you pay for a full set of construction drawings.

Expect permit and review fees in the range of $600–$1,800 for an attached garage conversion and $2,000–$6,000 for a detached ADU, with utility connection or impact fees possible on top for a new unit with its own meters. Those fees are passed through at cost and shown as a line item, so you can see exactly what went to the jurisdiction.

Inspections happen in a set order and each one has to pass before the next trade covers its work: foundation and reinforcing before the pour, then rough framing, electrical, plumbing and mechanical, then insulation, then final. Scheduling around inspector availability is normal and it is already built into the construction calendar we hand you.

## The timeline, week by week

Here is a realistic sequence from your first phone call to a finished, inspected space. Design and permitting happen before demolition, so the construction schedule you receive is the one we build to.

Two schedule variables are outside anyone's control: plan review turnaround at the jurisdiction, and HOA architectural review if your Pflugerville neighborhood has one. Start the HOA submittal the same week you start design drawings and the two tracks run in parallel instead of back to back.

- Week 1: site visit at your house. We measure the garage or walk the back yard, look at the panel, the water heater, the sewer cleanout and the slab, and talk through what you want the space to do.
- Weeks 2–5: design. Floor plan, elevations, window and door schedule, finish selections. You see the plan before you see a price.
- Weeks 4–8: engineering and construction documents, plus HOA submittal if one applies.
- Weeks 6–14: permit submittal, plan review, any revisions the reviewer asks for, permit issued. A conversion usually clears faster than a new detached structure.
- Garage conversion construction: 12–20 weeks from demolition to final inspection — floor leveling, framing the old door opening, windows, insulation, mechanical/electrical/plumbing rough-in, drywall, finishes, final.
- Detached ADU construction: 5–8 months — site work, utility trenching, foundation, framing, dry-in, rough-ins, inspections, drywall, cabinets, trim, finishes, final.
- For reference on our other work in the same house: a bathroom is typically 3 to 5 weeks, a kitchen 6 to 10 weeks, and a whole-home renovation 4 to 8 months.

## How our fixed-price design-build process works

We design it and we build it, which means one contract, one schedule and one phone number. The sequence is simple: site visit, design agreement, drawings and selections, engineering, then a fixed price in writing covering the full scope. You sign that number before demolition. The only things that change it are a change you ask for in writing, or something genuinely hidden that the permit office or an engineer requires once walls are open — and we show you the cost of that in writing before we proceed.

Framing, trim and cabinetry installation are done by our own carpenters, not a rotating cast of subs, which is the main reason our schedules hold. The workmanship warranty is 5 years. Financing is available if you would rather spread the cost than write a check at each milestone.

When you are interviewing anyone for a Pflugerville ADU or conversion — us included — ask these questions and compare the answers side by side.

- Is the price fixed in writing, and what specifically can change it?
- Who files the permit, and which jurisdiction does my address fall under?
- Is engineering for the foundation included in the price or billed separately?
- Who levels the garage slab and how, and is that line item in the proposal?
- How is the new space conditioned — mini-split, extension of the existing system, or its own unit — and who sized it?
- Are the carpenters employees or subcontractors?
- What does the workmanship warranty cover and how long does it run?
- Can I see the construction calendar before I sign, including inspection holds?

## What to do next

Three things to do this week, in order. One: pull your HOA covenants and architectural guidelines and find the section on accessory structures and exterior changes. Two: walk out to the garage or the back yard and photograph the electrical panel, the water heater, the outdoor condenser and the sewer cleanout — those four items drive a surprising share of the cost. Three: decide what the space is actually for. A home office, a suite for a parent, and a unit you intend to rent are three different builds with three different price tags, and deciding early keeps you from paying to redraw plans.

Then book the site visit. We will walk your Pflugerville property, tell you which of the two project types fits your lot and your budget, and put the design scope in writing before you commit to anything.

## Pflugerville homeowners also ask

### Can I build a detached ADU on my lot in Pflugerville?

That depends on the zoning that applies to your specific address, the setbacks, the height limit and the lot coverage allowed — and on your HOA's covenants if you are in a subdivision with an association. The permit office makes that determination, not a contractor. We research it for your address before you spend money on full construction drawings, and we handle the permit submittal and inspections either way.

### Will converting my garage hurt the resale value of my Pflugerville house?

It depends on what you leave behind. In neighborhoods where every house has a two-car garage, buyers notice when one is gone and there is no covered parking. The conversions that hold value best keep the exterior looking intentional — a proper window-and-wall assembly in matching brick or siding instead of an obvious filled-in door — and keep driveway parking usable. If storage is the real concern, a detached ADU plus keeping the garage is the more expensive but more flexible path.

### Do I need a bathroom in a converted garage?

Not for an office or a gym, and skipping it keeps you near the bottom of the $75,000–$100,000 range. Add a full bath and a kitchenette and you are typically at $95,000–$130,000, because that brings in supply lines, drain runs through or under the slab, venting and a water heater. If there is any chance you will want a bath later, we rough in the plumbing during construction — doing it after the floor is finished costs far more.

### How long will I be without my garage once work starts?

From the first day of demolition to final inspection, plan on 12 to 20 weeks for an attached conversion. Design, engineering and permitting all happen before that clock starts, so the construction calendar we hand you at signing is the one we build to. Clear the garage out completely the week before demolition — that is the one piece of prep we need from you.

## Check it with Pflugerville's own pages

Permit rules and fees change, and the office that issues the permit is the authority on them, not this guide.

- [City of Pflugerville — residential building applications](https://pflugervilletx.gov/residential-building-applications-guidelines)

What a garage conversion or ADU in Austin involves: https://www.homeremodelpro.com/austin/garage-conversion-adu

## Get a free estimate

- Call (512) 601-5666 (Monday to Friday 8am–6pm and Saturday 9am–2pm); a project consultant calls back within one business hour.
- Request an estimate online: https://www.homeremodelpro.com/austin#quote
- 5-year workmanship warranty · one fixed price in writing · in-house carpenters · permits and inspections included

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Source: https://www.homeremodelpro.com/austin/blog/garage-conversion-and-adu-pflugerville-guide · Home Remodel Pro Austin, TX