Air duct cleaning costs $270 to $1,200 in 2026, with most homeowners paying around $450 for a standard single-family home. Your final price depends on home size, number of vents, HVAC system complexity, and how contaminated your ductwork is. Our technicians at R&E Home Solutions have completed hundreds of duct cleaning projects across Charleston, and we’re pulling the pricing in this guide directly from the quotes and bills for those jobs, along with industry averages.
This guide covers the full pricing picture: average costs, what drives them up or down, hidden fees to watch for, and what to expect if you’re in South Carolina.
Key Takeaways
- Average cost: $270 to $ 1,200; most homeowners land around $450
- Priced by square footage ($0.15 to $0.40 per sq ft) or by vent ($25 to $75 per vent)
- Mold, pests, and duct condition are the biggest cost drivers beyond home size
- Add-ons like dryer vent cleaning, sealing, or sanitizing increase the total
- Air duct cleaning in Charleston typically falls within national averages, with humidity adding some mold-related cost risk
Methodology
The pricing in this guide is built from a combination of sources: current 2026 quotes and completed jobs from R&E Home Solutions across Charleston, published data from the National Air Duct Cleaners Association (NADCA), and rate ranges reported by Angi. Where a range appears, it reflects what most homeowners actually pay in that category, not the cheapest or most expensive outlier. Add-on and hidden cost figures come from documented cases where technicians found conditions requiring extra work beyond a standard cleaning.
Average Cost Overview
Most single-family homes pay between $270 and $1,000 for a complete duct cleaning, with the national average landing around $ 450. Entry-level jobs on smaller homes with easy access come in lower, while larger homes, multiple HVAC systems, or heavily contaminated ductwork push costs toward the higher end.
- A 1,200-sq-ft home costs $180 to $480. This size represents a typical starter home or condo, with a single HVAC system and fewer vents to clean, keeping the job on the shorter side.
- A 1,500-sq-ft home costs $225 to $600. This size covers many single-story homes and smaller two-story layouts, with pricing sitting slightly above the smallest tier due to additional vents and ductwork length.
- A 2,000-sq-ft home costs $300 to $800. This is close to the average American home size, and pricing here reflects a standard single-system cleaning with no major complications.
- A 2,500-sq-ft home costs $375 to $1,000. Homes at this size often have more rooms or a second floor, which adds vents and ductwork branches without necessarily requiring a second HVAC system.
- A 3,000-sq-ft home costs $450 to $1,200. Larger homes often mean more vents, longer ductwork runs, and sometimes a second HVAC zone, all of which add labor time.
What’s typically included in a standard quote:
- Cleaning of supply and return ducts
- Vent and register cleaning
- Basic inspection of accessible HVAC components
What usually costs extra:
- Mold or pest remediation
- Sanitizing or deodorizing treatments
- Duct sealing or repair
- Dryer vent cleaning
What Affects the Cost of Air Duct Cleaning
Home Size and Number of Vents
Larger homes have more ductwork and more vents, which directly increases labor time. Some companies price by square footage, others by vent count, so it’s worth asking which method a quote uses before comparing prices.
- A supply vent costs $25 to $50 each. Supply vents are more numerous but simpler to access, keeping per-vent pricing lower.
- A return vent costs $40 to $75 each. Return vents pull air back into the system and often require more thorough cleaning since they collect more debris.
HVAC System Complexity
Homes with multiple HVAC units, separate zones, or additions like finished basements and converted attics take longer to clean and require more equipment setup.
- A single system with one zone costs $250 to $550. This is the most straightforward setup and the baseline most quotes are built from.
- A single system with multiple zones costs $350 to $750. Additional zones mean more ductwork branches and vents to reach, even with just one central unit.
- A home with multiple HVAC systems costs $500 to $1,200. Cleaning two full systems essentially doubles the labor and equipment time required.
Accessibility
Ductwork running through tight crawl spaces, high ceilings, or custom layouts adds time and sometimes requires specialized equipment.
- Difficult access adds $50 to $250. Most projects fall between $50 and $250, with an average cost around $125. Crawl spaces and high ceilings slow down the work and sometimes require extra safety equipment.
- Custom or highly restricted layouts add $150 to $500. Older homes or additions with non-standard duct routing take considerably longer to navigate safely.
Condition of the Ducts
Heavily soiled ductwork, pet hair, or years of neglect all extend the time a job takes and may require additional passes or tools.
- Light dust with recent maintenance adds no extra charge, since this falls within a standard cleaning scope.
- Moderate buildup adds $50 to $200. Most projects fall between $50 and $200, with an average cost around $100. This reflects ducts that haven’t been cleaned in three to five years but show no major contamination.
- Heavy buildup adds $150 to $500. Ductwork that’s gone a decade or more without cleaning often requires extra passes with agitation tools and additional vacuum time.
Mold Growth
Mold complicates a standard cleaning significantly, since it requires testing, containment, and sometimes full remediation rather than a simple vacuum-and-brush process.
- Lab testing costs $50 to $700 per sample. Most projects fall between $50 and $200, with the higher end reflecting more comprehensive analysis. Testing confirms whether visible growth is actually mold before any treatment begins.
- Minor mold treatment costs $1,223 to $3,753. This covers targeted cleaning and antimicrobial treatment of a limited area within the ductwork.
- Full mold remediation costs $2,000 to $10,000. Severity and system size both drive this range, since extensive contamination requires more labor, materials, and follow-up testing.
If you’re seeing signs of mold, certified mold inspection services confirm what you’re dealing with before committing to a treatment cost. Professional mold remediation handles removal as its own service once testing confirms the problem.
Pest Infestation
Rodents and insects can damage ductwork and leave behind contamination that needs to be addressed before cleaning can proceed.
- Pest control treatment costs $108 to $261. Most projects fall between $108 and $261, with an average cost around $185. This covers a standard extermination visit before duct cleaning begins.
- Rodent removal costs $189 to $665. Severity of infestation drives this range, since multiple entry points or nesting sites require more extensive work.
Additional Costs to Expect
A few costs commonly surprise homeowners because they’re not part of a standard base quote.
- Dryer vent cleaning costs $100 to $250. Most projects fall between $100 and $250, with an average cost around $175. This is a separate system from HVAC ductwork and often gets bundled in for convenience.
- Duct sealing or repair costs $300 to $1,200. Damaged or leaking ducts need this fix separately from cleaning, since sealing addresses air loss rather than contamination.
- Sanitizing or deodorizing treatment costs $150 to $400. This applies after physical cleaning is complete and targets lingering odors or bacteria rather than visible debris.
- Asbestos testing or removal costs $5 to $20 per square foot. Older homes with vintage ductwork materials may require this before any cleaning work can proceed safely.
Watch for companies offering whole-house cleaning under $100. These prices are rarely the full cost and often lead to upselling once technicians are already inside your home, with charges for individual vents, “contamination fees,” or components that should have been part of the base service from the start.
R&E Home Solutions quotes the full scope upfront, in writing, before any work begins, so what you’re quoted is what you pay. Reach out for an honest, itemized estimate on your home.
Air Duct Cleaning Costs in Charleston, South Carolina
South Carolina’s humid climate plays a real role in duct cleaning costs here compared to drier regions. Charleston’s high humidity for much of the year creates more favorable conditions for condensation and mold growth inside ductwork, which means mold-related add-on costs show up somewhat more often in local jobs than they might in a dry climate state. Standard cleaning pricing in the area tracks closely with national averages, but homeowners here should factor in a higher likelihood of needing mold testing or treatment as part of the total cost, especially in older homes or those with a history of water intrusion. Multiple HVAC zones and longer duct runs add labor time.
| Home Size | Square Footage | Price Range | Average Cost |
|---|---|---|---|
| Small | Under 1,500 sq ft | $250–$450 | $350 |
| Medium | 1,500–3,000 sq ft | $350–$650 | $500 |
| Large | 3,000+ sq ft or multi-system | $500–$1,700 | $700 |
Frequently Asked Questions
Will cleaning my ducts lower my energy bill?
It can. Clogged ductwork forces your HVAC system to work harder to push air through, so removing buildup often improves airflow and efficiency, particularly if your ducts were heavily contaminated beforehand.
How much does duct cleaning cost with mold removal included?
Expect to pay $2,000 to $10,000 total when mold remediation is required, since this adds testing, containment, and specialized treatment on top of the standard cleaning cost.
How often should ducts be cleaned?
Every three to five years for most homes, though pets, allergies, recent renovations, or visible mold can shorten that timeline.
Are the $99 whole-house cleaning ads legitimate?
Usually not. These prices typically don’t reflect the actual scope of work and often lead to add-on charges once the crew arrives.
What should I look for in a duct cleaning company?
NADCA certification, transparent per-vent or per-square-foot pricing, a written estimate before work begins, and a willingness to explain their process without pressure tactics.
Final Thoughts
Air duct cleaning typically costs $270 to $1,000, with home size, vent count, system complexity, and duct condition driving most of that range. Mold, pests, and accessibility issues can push costs higher, while a straightforward single-system home with easy access tends to land near the lower end.
If you’re ready to find out where your home falls, R&E Home Solutions provides upfront, itemized estimates before any work begins. We’re NADCA certified, family-owned and operated, and have built up over 800 five-star reviews and 15 years of experience serving Charleston homeowners, so you’re getting a quote from a team with the credentials and track record to back it up. Reach out to schedule an inspection and get an accurate quote for your specific system.
