Johns Island ADU Construction
If you own a sizeable plot of land, you may wish to build a secondary structure on it to serve one of many different purposes. Some wish to build a large, secondary garage that they can use as storage space, a workshop, or a “man-cave.” Others may wish to build a pool house so that a restroom and other amenities are within quick reach of their swimming pool. Others might wish to build a livable space for a live-in relative or that they can rent for residual income. Whatever your goals might be, Harper Construction offers high-quality ADU construction.
Every ADU project starts with proper land preparation and grading to ensure that the foundation will be level and suitable for building on. Once prepared and the foundation is put in place, our work crews follow plans carefully and use premium materials to ensure your final product not only lives up to what you envisioned, but performs well too. We’re confident in our work, and we want you to be as well. To give you this confidence, we back all of our workmanship with a one-year warranty.
ADUs can be many things, including:
- Additional living spaces
- Convenient bathrooms
- Home offices
- Studio spaces
- Secondary garages
- Customized workshops
Start the process of designing and constructing your additional building by calling Harper Construction at (843) 594-2245 today.
What Is an ADU?
An “accessory dwelling unit,” or ADU for short, is an additional, secondary structure built on a plot of land already occupied by a primary building. These structures are usually detached and independent from the home, but some ADUs can be attached by an additional hallway for convenient access. ADUs are almost always permitted, meaning that all permits were obtained and requirements followed during the construction process. Permitted structures are included with surveys and calculated as a part of the value of that plot of land.

We Handle All Aspects of Your ADU Construction Project
If you’re looking to build an ADU, turn to Harper Construction. Customers throughout the Charleston area, including Seabrook and Kiawah Islands, know that they can count on us when quality matters. We are experienced, thorough, meticulous, and focused on even the smallest details to ensure every project we complete meets the highest standards of quality. We’re able to control our quality so well because we use our own labor force for each project—a team of professionals where almost everyone has been with us for five years or more.
From pool houses to home offices, count on Harper Construction to build it right. Contact us today to get started and receive an estimate.

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