Custom Home Additions in San Antonio, Boerne, & the Texas Hill Country

Luxurious modern bathroom design with floating vanities, glass-enclosed shower, and standalone soaking tub in a custom home by Lee Casey Builders in Central Texas

All Services

Dallas the Great Dane, the beloved mascot of Lee Casey Builders, patiently waiting by a vintage rotary phone in a cozy home setting near San Antonio, Texas

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Big ideas start with small conversations. Feel free to Contact Us and let’s chat about your future home.

Whether it's a luxurious master suite for restful privacy, a spacious family room to create memories or even an inviting guest cottage you've been envisioning, we're here to help you expand your home to match your evolving lifestyle completely without the disruption of moving. At Lee Casey Builders, we specialize in blending new additions with existing structures and know the local style and building requirements to seamlessly turn your vision into a harmonious extension of your home.

Why Choose Lee Casey Builders for Your Custom Home Additions?

1
Designed Around You
Cohesive plans that blend perfectly integrate with your home's existing style and your personal taste.
2
Quality Craftsmanship
With attention to detail, we deliver workmanship that stands the test of time.
3
Clear & Open Communication
We keep you informed with regular progress reports and budget updates.

Homeowners reviewing custom floor plan designs with Lee Casey Builders during a new home consultation in the San Antonio area

Modern two-story custom home under construction with flat rooflines, expansive glass, and dark exterior materials by Lee Casey Builders in the Greater San Antonio area

Types of Home Additions We Offer

Rustic outdoor patio with stone flooring, wrought iron accents, and Hill Country views on a custom-built home by Lee Casey Builders near Bulverde, Texas

Master Suites & Bedroom Expansions
Kitchen & Dining Expansions
Sunrooms & Outdoor Living Spaces
Guest Suites & In-Law Quarters
Second-Story Additions

Premium Materials & Trusted Suppliers

Your home deserves the best, and by partnering with trusted local suppliers, we select only premium products, from energy-efficient windows and doors to robust roofing systems that enhance your home's beauty and withstand everyday living.

Achieving a Perfect Match

The beauty of a home addition is in its seamless integration. Our design team carefully considers every detail, from roof angles and siding colors to interior finishes, for an addition that looks and feels as though it's always been a natural part of your home. The result is not only a stunning visual blend but an increase in comfort and home value.

Sustainable & Smart Upgrades

You care about your home's environmental footprint and long-term efficiency. We integrate eco-friendly practices and advanced technology, including energy-efficient HVAC systems, solar-ready roofing, and intuitive smart-home features. Your home addition will be thoughtfully designed for both sustainability and your family's comfort.

Simple, Clear Pricing

We understand budgeting is crucial. That's why we make sure to provide you with an upfront itemized proposal that outlines all costs before any construction begins. And, of course, should your vision evolve during the process, we make sure to provide you with a revised quote, so you have clarity and confidence every step of the way.

Efficient homes

Sustainable Building Practices: Building for the Future

Quality Products

We only use materials from personally verified suppliers.

At Lee Casey Builders, we believe that quality and integrity begin at the source, and that's why we carefully vet each of our suppliers to guarantee the highest standards of craftsmanship, sustainability, and reliability. From premium hardwoods to advanced insulation products, we only select materials proven to last that we would trust in our own homes.