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Tap and Impact Fees
Impact fees
Charleston Water System charges impact fees for the construction of new water/wastewater lines for homes, businesses, and developments. Water impact fees are based on the meter size and sewer impact fees are calculated using Equivalent Residential Units (ERUs) for residential customers and Unit Contributory Loadings (UCLs) for commercial properties. Charleston Water System does not charge impact fees for dedicated fire service lines.
These fees are charged to recover costs associated with expansion and maintenance of the water distribution and wastewater collection systems. These fees are listed in the table below. For information on how these fees are calculated, please download our Development Information Guide (PDF) posted on our developer and contractor document index page .
Affordable housing rate
Reduced impact fees for affordable housing are available to qualified applicants. The affordable housing rate waives the $500 engineering services charge included in the water and sewer impact fee structure, allowing a total savings of $1,000 for water and sewer impact fees. To find out more about the affordable housing impact fee rate, please contact the Lowcountry Housing Trust for qualification criteria.
Tap fees
Water tap fees cover the cost of installing a water meter, and are based on meter size. The sewer tap fee is charged to cover the cost of inspecting sewer connections made by contractors. Dedicated fire service lines are not charged a tap fee.
Change-in-use Fee
Businesses opening a new sewer account at an existing location may be subject to a one-time, non-refundable change-in-use fee. This fee helps Charleston Water System fund expansion of the sewer system, which is necessary to handle the increase of wastewater generated by the change in use of an existing facility or construction of a new facility.
Developers and Contractors, click here for more information
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Tap & Impact Fees Schedule (effective 1/30/2006) |
Water System Connection Charges (Does not apply to dedicated fire services)
New Water Service Charges Excluding Origination Fees |
Tap Size |
Water Tap Fee |
Water Impact Fee |
Total |
3/4" |
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$2,200 |
$2,700 |
1" |
$1,200 |
$3,380 |
$4,580 |
1 1/2" |
$2,000 |
$6,100 |
$8,100 |
2" |
$2,200 |
$9,500 |
$11,700 |
3" |
$8,000 |
$17,500 |
$25,500 |
4" |
$14,000 |
$28,800 |
$42,800 |
6" |
$16,000 |
$36,500 |
$52,500 |
8" |
$20,000 |
$56,900 |
$76,900 |
10" |
$28,000 |
$67,700 |
$95,700 |
Wastewater System Connection Charges
New Wastewater Service Charges Excluding Origination Fees
Please see the Development Information Guide for instructions on calculating these fees |
Tap Size |
Wastewater Tap Fee |
Wastewater Impact Fee |
Total |
6" |
$200 |
$2,650 |
$2,850 |
8" |
$700 |
$2,650 |
$3,350 |
Change in Use Fee |
All |
$2,150 |
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$2,150 |
* Engineer Service Fees are included in the Impact Fee Totals. |
** Origination Fees are added to individual new service connections. |
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| Customer Service>Tap & Impact Fees |
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