Accessory Dwelling Unit (ADU) Construction in Mount Pleasant, SC — Costs $77,160 to $450,100
What does accessory dwelling unit (adu) construction cost in Mount Pleasant? Average $192,900, ranging $77,160–$450,100. Labor runs $43.26/hr locally — 29% above the national average. Free breakdown with material + labor split.
Mount Pleasant, SC Market
+29% vs nationalLabor Rate
$43.26/hr
Material Index
113
Avg Permit Cost
$1,525
Median Home Price
$520,000
In a smaller market like Mount Pleasant, South Carolina, the pool of contractors specializing in accessory dwelling unit (adu) construction may be more limited. Getting 3+ quotes is especially important to ensure fair pricing. At 29% above the national average, Mount Pleasant is one of the more expensive markets for home improvement — driven primarily by above-average labor rates in the region. With a median home price of $520,000, this accessory dwelling unit (adu) construction represents just 37.1% of typical home value — a relatively small investment that can significantly boost curb appeal or functionality.
Low Estimate
$77,160
National: $60,000
Mid-Range
$192,900
National: $150,000
High End
$450,100
National: $350,000
Per Sq Ft
$322
National: $250
Accessory Dwelling Unit (ADU) Construction Cost Calculator for Mount Pleasant
Adjusted for Mount Pleasant's labor rate ($43.26/hr) and material costs (index 113).
Mid-grade materials, good quality fixtures, standard options.
Estimated Total in Mount Pleasant
$192,900
Based on 200 sq ft at mid quality, adjusted for Mount Pleasant market rates.
Local Cost Breakdown
At Mount Pleasant's average rate of $43.26/hr (44% above national avg)
Material cost index 113 (13% above national baseline of 100)
Accessory Dwelling Unit (ADU) Construction vs. Home Value in Mount Pleasant
| Metric | Mount Pleasant | National Avg |
|---|---|---|
| Accessory Dwelling Unit (ADU) Construction (Mid-Range) | $192,900 | $150,000 |
| Median Home Price | $520,000 | $350,000 |
| Project as % of Home Value | 37.1% | 42.9% |
| Estimated ROI | 80% | 80% |
| Median Household Income | $88,000 | $75,000 |
What Affects the Price in Mount Pleasant
- 1Local labor rates ($43.26/hr in Mount Pleasant)
- 2Material cost index (113 vs national 100)
- 3Attached vs detached
- 4Size and bedroom count
- 5Kitchen and bath quality
- 6Local ADU regulations
Popular Upgrades
- Full kitchen
- Separate entrance
- Solar panels for energy independence
Other Projects in Mount Pleasant, SC
Second Story Addition
$257,200
Room Addition
$115,740
Swimming Pool Installation
$81,562
Garage Addition
$70,730
Home Addition
$101,632
Inground Swimming Pool
$80,548
Attic Conversion
$71,588
Swimming Pool Construction
$65,080
Accessory Dwelling Unit (ADU) Construction in Other South Carolina Cities
Planning a Accessory Dwelling Unit (ADU) Construction in Mount Pleasant
Building permits are typically required for a accessory dwelling unit (adu) construction in Mount Pleasant. The average permit fee in this area is $1,525, though costs vary based on project scope. Permit fees in this market are above average — factor them into your total budget. Plan for 6-18 months from start to finish.
A accessory dwelling unit (adu) construction is a complex project best left to licensed professionals. In Mount Pleasant, skilled contractors charge an average of $43.26/hr, and the specialized nature of this work means cutting corners on labor can lead to costly rework.
With a median household income of $88,000, many Mount Pleasant residents can budget for this project through savings. The mid-range cost of $192,900 represents 219% of the typical household's annual income.
Accessory Dwelling Unit (ADU) Construction — National Guide
See the full national cost guide with DIY tips, cost factors, and ROI analysis.
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