Custom ADU Builders | Quality Homes with Care in South Carolina

ADUs & Backyard Cottages in South Carolina

From first feasibility check to final inspection, D.A.R.T Construction builds accessory dwelling units that work hard on day one. Detached cottages, garage apartments, over-garage suites, in-law suites, and backyard studios, our team manages utility coordination, setback and lot-coverage requirements, fire separation, and inspections while keeping the property orderly and safe. Meanwhile, we sequence trades tightly, issue line-item estimates, and communicate with steady updates. Whenever possible, we phase the work so you can remain in the primary home safely throughout construction.
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Why D.A.R.T Construction

Because tight sites and strict rules demand disciplined builders. We plan access routes, protect landscaping, and stage materials to minimize disruption. Plus, we track every milestone, document choices in writing, and solve issues before they slow momentum. Above all, we deliver clean workmanship in small footprints, like crisp framing, weather-tight shells, and durable finishes that stand up to everyday use.

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The process

Our ADU Build Process

01

Feasibility & Site Readiness

First, we review local requirements, note setbacks and lot coverage, confirm utility locations, and map site access and staging so the build starts cleanly.

02

Scope, Estimate & Schedule

Next, we define scope and allowances, provide a line-item estimate, and set a realistic timeline with inspection checkpoints and target dates.

03

Preconstruction & Approvals

Then we coordinate permitting, order long-lead items, arrange temporary services, and prepare the site with fencing, erosion control, and safety signage.

04

Structure & Systems

From foundations and framing to roofing, windows, and weatherproofing, we build the envelope; meanwhile, we rough-in electrical, plumbing, and HVAC and pass required inspections.

05

Finish, Tie-Ins & Commissioning

 Finally, we install interior and exterior details, complete utility tie-ins, verify operation of all systems, and deliver a thorough clean before the final walkthrough.

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Our Commitment

Compliance Without Confusion

Codes and rules won’t derail the schedule. We prepare, document, and move decisively.

  • Setback, height, and lot-coverage reviews with clear notes
  • Fire separation, egress, and smoke/CO requirements coordinated
  • Utility tie-in and metering coordination planned upfront
Small-Footprint Craftsmanship

Compact spaces demand precision, so we build with tight tolerances and durable assemblies.

  • True framing, square openings, and weather-tight shells
  • Moisture management at slabs, roofs, and penetrations
  • Sound control strategies between units and shared walls
Neighbor-Friendly Operations

We respect your street and your peace of mind throughout the build.

  • Predictable work hours and thoughtful site logistics
  • Clean perimeter, protected landscaping, and tidy staging
  • Minimal driveway/street obstruction with daily cleanup

Best ADU's Expert in SC

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From day one, our team is by your side guiding you through every step of your custom home journey. We take time to understand your goals, visit your site, and offer honest input on everything from layout to finishes. With thoughtful planning, transparent communication, and trusted execution, we turn complex projects into smooth, enjoyable experiences. The result? A home that feels like it was always meant to be yours.

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