The Premier ADU Builder in Georgetown & Central Texas: Custom Guest Houses and Casitas

The Local Authority - Milestone Builders

We navigate local Georgetown & Austin zoning requirements and building codes for you.

The Transformation & Value

• Designing an ADU is an opportunity to unlock new possibilities—whether you’re creating space for family, generating rental income, or adding long-term property value. Our site-built ADUs serve as guest houses, home offices, rentals, or multigenerational suites customized to your needs.

• If you are searching for an ADU builder near me, our team specializes in helping homeowners understand exactly what is possible. Because requirements vary by lot, we evaluate access, utilities, zoning, and impervious cover to determine feasibility. We ensure your ADU meets all local codes while fitting seamlessly into your existing property.

• Regulatory Mastery: Milestone Builders navigates Georgetown, TX, Austin, TX and Central Texas’ evolving ADU zoning regulations with 100% compliance.

• The Experts: Permitting, Site Plans, Design Limitations, Site Constraints, Utilities, Setbacks, Lot Size, and Tree Ordinances, we’ve seen—and solved—it all.

• Central Texas Roots: Led by Chad Moore, we build with local insight and leverage 20+ years of central Texas trade/vendor relationships to lower your investment costs. Fixed Pricing. No surprises.

Build Your ADU with Milestone Builders

Create a custom ADU that fits your Central Texas property perfectly.

What is an ADU?

In Texas, an Accessory Dwelling Unit (ADU) is defined as a secondary, independent living space located on the same lot as a primary single-family residence. To legally qualify as an ADU, the structure must be "habitable," meaning it contains its own dedicated facilities for sleeping, cooking, and sanitation (a full bathroom).

As Texas municipalities update laws to allow for more flexible housing, the Accessory Dwelling Unit (ADU) has become the premier way to maximize your property's potential.

The Austin HOME Initiative: Triple the Potential - Turn Your Extra Yard Space into an Investment
Did you know new Austin rules now make it easier to add more living space to your property? Whether you want to build a "casita" for family, a guest house for friends, or a rental unit for extra income, the Austin HOME Initiative has removed the old red tape.

Most Austin homeowners can now add up to two additional homes right in their own backyard—without the headache of complicated land subdivisions.

Milestone Builders provides a free site-feasibility analysis to determine exactly how these new HOME Initiative rules apply to your specific lot.. Click the link below to schedule today!

Simply put, an ADU is a self-sufficient secondary smaller home located on your existing lot. To be a legal, high-equity asset in Central Texas, your ADU must meet these "Gold Standard" criteria:

• Independent Living: It must feature its own dedicated kitchen, bathroom, and sleeping area.

• Built to Last: Whether site-built or modular, it must be on a permanent foundation and fully compliant with the International Residential Code (IRC).

• Sized for Success: While rules vary, most jurisdictions limit ADUs from 25% - 50% of your primary home’s size, typically ranging from 400 to 1,100+ square feet.

• Property Value: As a permanent structure, an ADU is subject to ad valorem tax, meaning it directly increases your total property value and long-term equity.

The Milestone Edge: We ensure your project is perfectly compatible with neighboring properties and fully compliant with local setbacks—turning "non-conforming" lots into modern, high-value homes. Unlike prefab 'shed' units, we design masonry, rooflines, and finishes to match your primary residence, preserving your neighborhood’s curb appeal and investment.

Ready to see if your lot qualifies for a second or third unit? Let's look at your site plan together.

The Milestone Advantage: Why Central Texas Homeowners Choose to build an ADU

Why an ADU is the smartest investment you’ll make this decade.

Why Build an ADU?

An ADU isn’t just a building; it’s a versatile asset that evolves with your life. Whether you are looking for financial security or family proximity, a Milestone ADU delivers:

• Passive Income for Life: Turn your backyard into a high-yield rental. With the booming Central Texas market, an ADU can pay for itself while generating monthly cash flow.

• The "Legacy" Suite: Keep your parents or adult children close while maintaining total privacy. It’s the "Gold Standard" for multi-generational living without the friction of sharing a roof.

• Instant Property Equity: Unlike a pool or a deck, a site-built ADU is a permanent residence that significantly spikes your home’s resale value and appraisal.

• The Ultimate Flex Space: Imagine a high-end home office, a private gym, or a luxury guest suite—all just steps away, but completely detached from the noise of the main house.

Stop paying for space you don't own. Build the lifestyle you want, right in your own backyard.

We leverage our 20+ years of trade relationships to provide fixed-price contracts—no surprises, just the best value per square foot in the region.

Unlock Your Properties Hidden Potential.

Why Central Texas Homeowners Choose to build with Milestone

Knowledge. Trust. Fixed Pricing. Transparency. Design. Build. 120 Day Guarantee!

Milestone Edge - Removes the Fear and Pain Points of Building.

• Regulatory Compliance: We know the codes and municipality requirements so you don’t have to.

• Preferred Trade Pricing: Leveraging 20+ years of central texas trade/vendor relationships to lower your investment costs. Fixed Pricing. No surprises.

• Standardized Excellence: Proven floor plans that maximize efficiency and ROI.

• Absolute Transparency: No hidden fees. Best value per square foot in the region.

• Key Design Feature: Every ADU is a permanent on-site investment with foundation design and architectural plans that match your home's aesthetic, not a portable prefab unit.

• Design: In-house architectural plan development, civil/structural engineering, and foundation design.

• The 120-Day Ground-to-Key Guarantee: From the moment we break ground, your project is on a 120-day countdown to completion. While the pre-construction permitting phase typically takes 60–120 days, our build team takes over the second the "go" button is pushed.

  • The Milestone Process: From Red Light to Move-In Ready.

  • Phase 1: Feasibility & Permitting (60–120 Days): We handle the Austin HOME Initiative and Williamson County red tape.

  • Phase 2: The 120-Day Build Guarantee: From the moment we break ground, the clock starts.

  • Phase 3: The Handover: Professional cleaning, final inspection, and keys in hand.

Don't guess at your lot's potential. Let 20+ years of executive building experience guide your investment.

Reviews

Hear from Central Texas homeowners who trust Milestone Builders.

We needed a Mother-in-Law Suite in Georgetown for my parents to age-in-place. Milestone Builders was the only team that understood the complex zoning hurdles. Their 120-Day Guarantee was real—we moved them in on time and the fixed pricing kept us on budget. Truly the best ADU builder near me.

Mark

Georgetown TX

I wanted to build a Backyard Casita for rental income but was overwhelmed by Austin ADU regulations. Milestone Builders handled the entire permitting process and delivered a high-quality, stick-built unit that matches my home perfectly. Their executive experience showed—no surprises, just great value.

Cole

Austin TX

★★★★★

★★★★★

McKenna

Austin TX

We wanted to leverage the Austin HOME Initiative to build a rental ADU for passive income, but the 'red tape' seemed impossible. Milestone Builders was a game-changer. They maximized our lot's potential, handled the entire permitting process, and delivered a high-end Backyard Cottage that appraised for far more than the build cost. If you want a turnkey investment with fixed pricing, this is the team.

★★★★★

★★★★★

Kristy

Liberty Hill TX

We wanted a custom pool house in Liberty Hill that felt like an extension of our home, not an afterthought. Milestone Builders is the right choice because they truly understand the local 'red tape.' They navigated the Village of Salado building permits and septic system setbacks with ease, which was our biggest worry. The final stick-built structure matches our masonry perfectly and has already significantly spiked our property value. If you're looking for a turnkey builder in Bell County who delivers on time and with total transparency, Chad and his team are the only ones to call.