Custom ADU Builders In Maryland

Create extra living space for family, guests, or rental income with a custom-built ADU, in-law suite, or carriage house anywhere in Maryland.

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Your Maryland Specialists for Custom ADU's & In-Law Suites

If you’re looking to expand your living space, an Accessory Dwelling Unit (ADU) — also known as an in-law suite, carriage house, or even a tiny home — offers a versatile solution that blends comfort, function, and long-term value. At Clarksville Construction, we design and build fully equipped secondary living spaces tailored to your property and needs.

Whether you want a private apartment for family, a charming rental cottage for extra income, a compact tiny home for downsizing, or a detached guesthouse for visitors, we provide expert craftsmanship and a seamless design-build process. Our team manages everything from permits and zoning to construction and finishing, ensuring your project meets Maryland’s building codes and enhances your property’s appeal.

We proudly serve homeowners throughout Maryland, delivering custom home additions  that maximize your space while complementing your home’s style.

Maximize Your Space and Investment

  • Custom Design & Flexible Layouts

From spacious in-law suites to compact tiny homes, we create floor plans that fit your property, style, and lifestyle. Every detail is tailored to your vision.

  • Turnkey Design-Build Service

We manage the entire process — design, permits, construction, and finishing — so you can enjoy a stress-free experience from concept to completion.

  • High-Quality, Energy-Efficient Materials

Built to last with durable construction and modern energy-saving features, your ADU will stand the test of time while keeping utility costs low.

  • Maryland Building Code Expertise

Our team knows local zoning laws, HOA guidelines, and state regulations, ensuring your project is compliant and approved without costly delays.

5 stars – 113 Reviews

4.9 stars – 27 Reviews

5 stars – 3 Reviews

4.8 stars – 260 Reviews

4.8 stars – 48 Reviews

Our 4-Step Process for Building Your ADU or In-Law Suite

Consultation

We start with a free on-site consultation to discuss your vision, budget, and property layout. Whether it’s an ADU, carriage house, tiny home, or in-law suite, we’ll explore the best approach for your space.

Design

Our design team creates a detailed plan that matches your needs and meets Maryland building codes. From modern layouts to traditional styles, every element is customized to fit your goals.

Construction

We handle all permitting and approval processes with local authorities, then move seamlessly into construction. Our team delivers quality craftsmanship, energy-efficient materials, and precise execution

Quality Assurance

Once your new space is complete, we review every detail with you, address any questions, and make sure you’re 100% satisfied with your new ADU. Our work is backed by warranties for lasting peace of mind.

Ready to Add an ADU to Your Property?

See What Our Maryland Clients Have To Say

Other Home Additions We Build

Second Stories

Turn your single story ranch into a full second story home with a beautiful addition!

Sun Rooms

Create a space to relax and catch some rays within the comfort of your own home!

Screened In Porches

The perfect area to entertain and relax, away from the bugs but still outside.

And More!

From garages to in-law suites, we do it all. Talk to us today to see how we can make your addition a reality!