Looking for a special inspection agency in Duncan, SC? Describe your project once and up to three special inspection agencies who work in Duncan and Spartanburg County get back to you with a quote. It's free and there is no obligation.
Duncan is home to about 4,594 people (2024 Census Bureau estimate), a growing community (+13.5% since 2020). With 694 people per sq mi, it is a semi-rural area. Commercial and multifamily projects here require special inspections for structural work.
Duncan at a glance
- Population (Census Bureau estimate, 2024)
- 4,594 (+13.5% since 2020)
- Rank in South Carolina
- 69th of 271 cities and towns
- Land area
- 6.6 sq mi
- Population density
- 694 people per sq mi (semi-rural)
- Type
- Town (Duncan town)
- Main county
- Spartanburg County
What to check before hiring in Duncan
- Statement: the building official approves the statement of special inspections.
- Independence: in South Carolina, the owner usually hires the agency.
- Certifications: ask for ICC, ACI or AWS credentials.
- Price drivers: scope, site visits, lab tests and reports.
Useful official resources
-
ICC: International Code Council
Official information and guidance.
-
ACI: American Concrete Institute
Official information and guidance.
Services available in Duncan
-
Special inspections and testing
IBC chapter 17 special inspections and materials testing for a construction project.
Frequently asked questions in Duncan
How much do special inspections cost in Duncan, SC?
It depends on the scope, visits and tests. Describe your project: agencies who serve Duncan reply with a proposal.
How fast can inspectors come on site?
Many agencies offer next-day scheduling.
Do they test materials too?
Most agencies run a materials lab for concrete, soils and steel.
Which special inspection agencies will contact me?
Up to three independent special inspection agencies who serve Duncan and the surrounding area, chosen for the service you need. Your details are shared only with your consent.
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.