ACCESSORY DWELLING UNITS & DETACHED STRUCTURES

WHAT IS AN ADU?

An accessory dwelling unit, commonly known as an ADU, is a self-contained living space that exists on the same property as a single-family home.

ADUs are typically designed as secondary units and can be attached to the primary residence or built as a separate structure. These units allow homeowners to maximize their property’s potential by providing additional living space for a variety of purposes.

EXTRA SPACE TO FIT YOUR LIFESTYLE

SC DETACHED STRUCTURE & ACCESSORY DWELLING UNIT BUILDERS

Citadel Enterprises specializes in designing and constructing detached structures and accessory dwelling units (ADUs) that perfectly complement your Lowcountry property.

Whether you need a detached garage, a workshop, or a guest house, our experienced team will create a functional and aesthetically pleasing structure that meets your specific needs.

ADVANTAGES OF DETACHED STRUCTURES AND ADUS

Increased Living Space

ADUs offer valuable extra space for various needs, such as accommodating extended family members or serving as a home office.

Flexibility

Our expert accessory dwelling unit contractors will tailor your ADU to your exact needs, ensuring a seamless fit with your property while bringing your vision to life.

Potential for Rental Income

ADUs provide homeowners with a valuable income opportunity, allowing them to rent the space to help offset their mortgage or expenses.

Enhanced Property Value

Attached or detached accessory dwelling units can increase the value of your property, making it more attractive to potential buyers.

Contact Us

START YOUR HOME JOURNEY WITH US

EXPLORE MORE HOME ADDITION OPTIONS

Beyond accessory dwelling unit construction, Citadel Enterprises can enhance your home with a seamless and well-designed residential addition.

Learn more about our custom home addition process for Mt. Pleasant and Charleston homeowners.

Frequently Asked Questions

How much does it cost to build an ADU in Mt. Pleasant, SC?

Most ADU projects in Mt. Pleasant fall between $150 and $300 per square foot, depending on whether the unit is detached or attached, the level of finish, and site conditions. A 600-square-foot detached unit typically runs $90,000 to $180,000. Costs rise with foundation requirements, utility runs, and elevation requirements in flood zones. We provide a fixed-scope estimate after a site visit.

Do I need a permit to build an ADU in Mt. Pleasant?

Yes. Every ADU in Mt. Pleasant requires a building permit, and most require zoning review to confirm setbacks, lot coverage, and unit size. Detached units may also trigger stormwater or tree protection review depending on the lot. We handle permitting as part of the project.

Can I rent out an ADU in Mt. Pleasant?

Long-term rental of an ADU is generally permitted, but short-term rental rules are far more restrictive and vary by zoning district. Mt. Pleasant regulates short-term rentals separately from ADU construction. Confirm your specific district's rules before planning to rent. A permitted ADU is not automatically a permitted rental.

How long does ADU construction take?

Plan on 8 to 14 months start to finish. Design and permitting take 3 to 6 months. Construction runs 5 to 8 months for a typical detached unit. The timeline extends if the lot requires survey work, variance requests, or elevation for flood compliance.

Will an ADU increase my property value?

Usually, yes. An ADU adds conditioned square footage and, in markets like Mt. Pleasant, rental income potential — both of which appraisers and buyers recognize. The return varies by neighborhood and by whether the unit reads as a legitimate second dwelling or an oversized shed. Build quality and permit status matter more than size.