Introduction
The way we live is changing. Families are blending generations under one roof, homeowners are exploring short-term rentals, and more people are working from home than ever before. Accessory Dwelling Units (ADUs), carriage houses, and guest homes are no longer a luxury; they’ve become a smart, practical solution for today’s households.
At D.A.R.T Construction, we design and build secondary living spaces that add flexibility, value, and comfort. Whether you need a rental unit, a home office, or a guest suite for family, our team ensures your ADU matches the style of your home and serves your needs for years to come. This guide will explain what ADUs are, how they work in South Carolina, the benefits they bring, and how our team makes the process seamless.
What Is an ADU?
An ADU, or Accessory Dwelling Unit, is a self-contained residential unit built on the same property as a primary home. These units can take different forms, including:
Detached ADUs
– freestanding structures like a small cottage in your backyard.
Carriage Houses
– apartments built above or next to a garage.
Attached ADUs
– additions to your existing home with a separate entrance.
Guest Homes
– smaller residences designed specifically for visiting family or long-term guests.
Each ADU typically includes a kitchen, bathroom, living area, and sleeping space. The design can be as simple as a studio or as spacious as a two-bedroom suite. Learn more about our services on our ADUs page.
Why Homeowners in South Carolina Are Building ADUs
ADUs solve many modern challenges by adding both livable square footage and versatility. Here are the most common reasons homeowners choose to build them:
1. Multigenerational Living
Families with elderly parents or adult children can provide independence and privacy while staying close.
2. Rental Income
ADUs make excellent long-term or short-term rental units, offering an extra source of income.
3. Home Office or Studio
With remote work on the rise, ADUs create distraction-free spaces for productivity.
4. Guest Accommodations
No more cramped guest rooms, your visitors enjoy privacy and comfort.
5. Property Value
Adding an ADU can significantly increase your property’s resale value.
Understanding Zoning and Regulations in South Carolina
Before construction, zoning and permitting are critical. Every city and county in South Carolina has specific rules regarding:
- Lot size and setbacks
- Maximum ADU square footage
- Parking requirements
- Height restrictions
- Utility connections
D.A.R.T Construction manages these details for you. We research local codes, handle applications, and work with inspectors to make sure your ADU is fully compliant. This means less stress for you and fewer surprises along the way.
Designing the Right ADU for Your Needs
A well-planned ADU doesn’t feel like an afterthought, it feels like a natural extension of your property.
Design considerations include:
Size and Layout:
Compact yet functional designs maximize small spaces.
Style and Materials:
Exteriors should complement your main home.
Windows and Lighting:
Proper placement improves privacy and makes small spaces feel open.
Storage:
Built-ins and multipurpose furniture keep things uncluttered.
For example, a detached carriage house might include a two-car garage on the first level with a one-bedroom apartment above. This provides both storage and income-generating potential in one structure. See related projects on our Outbuildings page.
Utility Planning
One of the most overlooked aspects of ADUs is utility planning. Key considerations include:
Water and Sewer:
Does your property have the capacity to handle additional demand?
Electricity:
ADUs often need separate circuits or sub-panels.
Internet and Data:
Many homeowners run high-speed internet to their ADU for remote work or rentals.
HVAC:
Compact units benefit from ductless mini-split systems, which are efficient and space-saving.
At D.A.R.T Construction, we coordinate all utility connections with licensed trade professionals.
Budgeting for an ADU
Costs depend on several factors:
- Size of the ADU
- Foundation type (slab, crawlspace, or basement)
- Complexity of design and roof structure
- Number of bathrooms and kitchens
- Site prep, grading, and landscaping
While ADUs are typically more affordable than full-sized custom homes, they still represent a significant investment. Many homeowners offset this cost through rental income.
Rental Potential and ROI
In South Carolina, ADUs are increasingly popular as rental properties. Whether you choose to rent long-term or as a short-term vacation property, an ADU provides a flexible income stream.
Key tips for maximizing rental success:
- Use durable flooring and finishes to reduce maintenance costs.
- Provide separate parking and entry for privacy.
- Confirm local rules on short-term rentals before listing.
- Design with curb appeal in mind photos matter.
The D.A.R.T Construction Advantage
Unlike anyone else our team brings experience, craftsmanship, and project management to every ADU build. We guide you through every step, from zoning checks and design to construction and final walkthrough. Our licensed and insured team ensures your project is completed on time and within budget.
SO Now
Ready to explore the possibilities of an ADU, carriage house, or guest home? Contact D.A.R.T Construction today for a free consultation.
Email us at dartconstruction308@gmail.com,
call +1 864-360-7647, or
use our Contact Page.
FAQs
Do I need a permit to build an ADU in South Carolina?
Yes. All ADUs require permitting. Our team handles the application process and works with local officials to ensure compliance.
How big can an ADU be?
Size limits vary by city and county, but most ADUs range between 400 and 1,000 square feet.
Can I rent out my ADU?
Yes, many homeowners use ADUs as rental units. Always check local zoning rules for restrictions on long-term or short-term rentals.
How long does it take to build an ADU?
Design and permitting can take a few months. Construction timelines vary based on size and complexity, usually between 4–8 months.
Do ADUs increase property value?
Yes. A well-designed ADU typically raises your property’s overall market value while providing functional space.
Can you build above my existing garage?
Yes, carriage houses are one of the most popular ADU options. We’ll evaluate the structure to ensure it can handle the load.
About the Author
D.A.R.T Construction is a trusted builder in South Carolina, specializing in custom homes, ADUs, home additions, renovations, garages, and outbuildings, we provide thoughtful design and quality craftsmanship backed by full-service project management.
