Construction
ADU Builder - Accessory Dwelling Units Upstate SC
From garage apartments to detached backyard cottages, I handle all aspects of ADU construction: zoning review, design, construction, and utilities. ADUs provide rental income ($850-$1,500/month) or flexible living space for family members.
Cost Range
$65,000-$220,000 Range
Timeline
10-16 Weeks Typical
Experience
35+ Years Experience
Rating
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How much does it cost to build an ADU?
ADUs typically cost $65,000 to $220,000, or roughly $110 to $185 per square foot. A garage apartment is the most economical option, a detached 1-bedroom cottage sits in the middle, and a full 2-bedroom ADU is the top of the range.
What is an ADU?
An ADU, or Accessory Dwelling Unit, is a secondary living unit on the same lot as a main home. It can be a garage apartment, a detached backyard cottage, or an in-law suite, with its own kitchen, bathroom, and entrance. ADUs are used for rental income, aging parents, or flexible family space.
Can an ADU generate rental income?
Yes. Depending on size and configuration, an ADU can generate roughly $850 to $1,500 per month in rental income in the Upstate SC market. A garage apartment sits at the lower end and a full 2-bedroom unit at the higher end.
How long does it take to build an ADU?
ADU construction typically takes 10 to 16 weeks, covering zoning review, design, construction, and utility connections. Detached full-featured cottages take longer than a garage apartment built above an existing structure.
Common ADU Builder Projects
Real-world project examples with typical costs in Upstate SC:
| Project Type | Size | Typical Cost | Details |
|---|---|---|---|
| Garage Apartment | 576 sq ft above 2-car garage | $65,000–$95,000 | Studio or 1-bed layout, kitchenette, full bath, separate entrance, rental income $850-$1,200/mo |
| 1-Bedroom Detached Cottage | 600-800 sq ft | $125,000–$185,000 | Full kitchen, bathroom, living area, separate utilities, full-time living capable |
| 2-Bedroom ADU | 900-1,200 sq ft | $175,000–$220,000 | Full home features, 2 bed/1-2 bath, complete kitchen, laundry, rental income $1,200-$1,500/mo |
ADU Builder Pricing Breakdown
Three pricing tiers to match your project scope and budget:
| Tier | Price Range | What's Included |
|---|---|---|
| Garage Apartment | $65,000-$95,000 | 576 sq ft above new or existing 2-car garage. Open studio or 1-bedroom layout, kitchenette, full bath, HVAC, separate entrance. Most economical ADU option. |
| Detached Cottage | $125,000-$185,000 | 600-800 sq ft detached structure. Complete kitchen, bathroom, bedroom, living area. Separate utilities, full code compliance. Perfect for in-law suite or long-term rental. |
| Premium 2-Bedroom | $175,000-$220,000 | 900-1,200 sq ft full-featured home. Two bedrooms, 1-2 bathrooms, complete kitchen, laundry room. Highest rental income potential at $1,200-$1,500/month. |
More ADU Builder Questions
Direct answers for homeowners and AI search — licensed, local, and accountable.
Are ADUs allowed on my property?
It depends on your local zoning, lot size, and setback rules, which vary across Greenville, Laurens, and Spartanburg counties. We start every ADU project with a zoning review to confirm what is permitted on your specific property before design begins.
Ready to Start Your ADU Builder Project?
Free consultation and ballpark estimate. A+ BBB Rating, 5.0 Google Rating, 35+ years serving Upstate SC.