Expand Your Home With Seamless Additions & Accessory Dwelling Units (ADUs)

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2-MINUTE PROJECT PERSONALITY QUIZ
Construction site of a house with a partially built wooden frame, a ladder leaning against it, and trees in the background.

Why Consider an Addition or ADU?

Life changes — your home should too. Whether it’s a growing family, an aging parent moving in, or the need for rental income, an addition or ADU provides:

  • Extra bedrooms or guest suites

  • Private living space for family or tenants

  • Home offices or creative studios

  • Long-term investment and resale value

Some homeowners choose to expand even further with a whole-home remodel

Construction worker wearing a yellow helmet and safety vest working on a wooden framing structure.

Our Additions & ADU Services

We handle every type of expansion project, including:

  • Second-story additions

  • Garage conversions

  • Detached guest houses and casitas

  • In-law suites and multigenerational spaces

  • Kitchen or living room expansions

  • Outbuildings including post-frame workshops, garages, ag buildings and more

Many families also upgrade interiors during an addition. Explore our kitchen remodeling and bathroom remodeling services for seamless design inside and out.

Proudly Serving Williamson County

We're based in Georgetown and serve homeowners throughout Williamson County, including:

  • Georgetown & Sun City

  • Cedar Park & Leander

  • Round Rock & Hutto

  • Liberty Hill & Jarrell

  • Taylor & surrounding areas

What to Expect:
Investment & Timeline

Home additions and ADUs in Williamson County typically range from $75,000–$300,000+ depending on size, type, and finishes.

Budget Tiers:

Garage Conversion / Small Addition
($75K–$125K)

    • 250–400 sq ft converted space

    • Basic finishes (LVP flooring, standard fixtures)

    • One bathroom added

    • Electrical and HVAC extended

    • Matches existing home exterior

Room Addition / In-Law Suite
($125K–$200K)

    • 400–600 sq ft new construction

    • Quality finishes throughout

    • Full bathroom included

    • Separate HVAC zone

    • Seamlessly integrated with existing home

What Affects Your Final Price:

  • Square footage: Cost per sq ft ranges from $250–$400+ depending on complexity

  • Foundation type: Slab vs. pier-and-beam affects cost and timeline

  • Bathroom inclusion: Adding plumbing increases cost $15K–$30K

  • Kitchen inclusion: Full kitchen adds $25K–$50K

  • Structural complexity: Second-story additions require foundation reinforcement

  • Site conditions: Slope, soil type, and utility access affect foundation costs

Detached ADU / Second Story
($200K–$300K+)

    • 600–900 sq ft independent living space

    • Custom finishes and fixtures

    • Full kitchen and bathroom

    • Separate utilities and entrance

    • Matches architectural style of main home

Timeline:

  • Garage conversions: 2–3 months

  • Room additions: 3–5 months

  • Detached ADUs: 4–7 months

  • Second-story additions: 6–9 months

    *All estimates include permits, materials, labor, and our 3-year warranty. Final pricing determined during your Planning Call based on your specific scope and material selections.

    👉 Schedule Your Planning Call to get a detailed estimate for your specific project

Schedule Your Planning Call
Interior view of a house under construction, showing exposed wooden framing, pink insulation in walls, a window on the right, and construction materials like metal beams, ladders, and wood planks.

Design & Craftsmanship That Fits

Our team ensures additions don’t look “tacked on.” We match exterior materials, rooflines, and interior finishes so your new space flows seamlessly with the existing home.

People working on architecture models and blueprints of houses on a table, with small house models, measuring tools, and drafting equipment.

Our Process

  1. Planning Call – Share your goals and must-haves.

  2. Concept Design – 3D renderings and layouts.

  3. Detailed Estimate – Transparent pricing and material choices

  4. Construction – High-quality craftsmanship delivered on schedule

  5. Final Walkthrough with you.

See our detailed remodeling process to understand how additions and ADUs fit into a full project flow.

ALL PROJECTS INCLUDE OUR GUARANTEE PACKAGE

  • Stack of newly printed American dollar bills, including one-dollar and hundred-dollar notes, standing upright on tiled flooring with a brick wall backdrop.

    $500/Week Late Penalty

    Paid to YOU in cash if we miss deadlines

  • A person's hands and arms on a white wooden table surrounded by tax documents, a calculator on a smartphone, a pen, and a piece of paper.

    Budget Lock Protection

    We pay cost overruns, not you

  • A man smiling and sitting inside a white van, leaning out of the window with the driver's side mirror visible.

    3-Year Warranty

    On everything we build

  • A middle-aged man with glasses and a gray beard, smiling, wearing a dark polo shirt against a plain gray wall.

    Direct Owner Access

    Personal cell with 4-hour response guarantee

Book Your Planning Call ->

What’s Possible With Your Addition/ADU?

Modern backyard with a green lawn, outdoor seating, and a black painted house with large windows, a patio, and a sliding door at sunset.
Small white shed with open glass door and window, surrounded by plants and outdoor furniture.
Room under renovation with drywall, a ladder, paint bucket, paint roller, and cardboard boxes.
A construction worker on a roof in a backyard, building a new extension with wooden framing, with neighboring houses and green trees in the background.

Not Sure Where to Start?

Take our 2-minute Project Personality Quiz to discover:

  • - Your project personality type (Detail Detective, Money Minder, Schedule Stickler, or Project Partner)

  • - Which guarantees matter most for YOUR project style

  • - Your custom 15-page remodeling guide (worth $47)

Over 247 Williamson County homeowners have discovered their type. Find yours in 2 minutes:

TAKE THE 2-MINUTE QUIZ NOW

FAQs

  • We design and build second‑story expansions, room additions (such as larger kitchens or living rooms), garage conversions, in‑law suites and detached accessory dwelling units (ADUs).

  • Timelines vary: room additions may take 3–5 months, while second‑story additions or detached ADUs can take 6–9 months, depending on design complexity and permitting. We provide a detailed schedule before construction begins.

  • Additions and ADUs typically require building, structural, electrical, plumbing and sometimes zoning permits. We handle all permit applications and inspections.

  • Yes. We select materials and architectural details that complement your existing home so the addition looks seamless.

  • We can discuss potential return on investment and connect you with lenders who specialize in home construction and remodeling loans

  • It depends on the scale and location of the addition. For smaller room additions you can often remain at home; larger second‑story projects may require temporary relocation during certain phases.

  • An accessory dwelling unit (ADU) is a secondary housing structure on your property, such as a garage apartment or detached cottage or casita. ADUs are ideal for multi‑generational living, rental income or guest accommodations.

  • Adding square footage typically increases the appraised value and property taxes. We can provide resources to help you estimate the impact and plan accordingly.

  • Our design takes into account existing HVAC, electrical and plumbing systems. We integrate new systems seamlessly to ensure efficiency and balance across the entire home.

  • Costs depend on size, design, finishes and site conditions. We provide a detailed estimate after assessing your property and discussing your goals.

Need more living space?

BOOK YOUR PLANNING CALL NOW