Swimming Pool/Hot Tub/Spa Permit

How Do I Apply? 

Please visit the Building Construction Permit section of our Citizenserve Citizen Access Portal to apply online.

When is a Swimming Pool/Hot Tub/Spa Permit Required?

A building permit is required for both above-ground and in-ground pools, as well as for outdoor spas and hot tubs. If a fence is being used as a barrier, a fence contractor is required, unless the homeowner is installing the fence themselves. Pool contractors must be licensed through the County. However, if the homeowner is installing the pool themselves, a license is not required.

What Will I Need to Submit?

  • For above-ground pools, manufacturer information showing the pump is UL listed and pool specifications
  • Deck plans, if a deck will be constructed to access the pool (see deck requirement handout) (pdf format preferred)
  • Construction plans (PDF format preferred)
  • A detailed plot plan (PDF) showing the location of your home and proposed pool/hot tub/spa. Show distances to property lines and keep in mind that structures may not be located over easements or septic systems.

Fees & Plan Review

Building Permit Fees (PDF)

The plan review process typically takes about 10 working days. When the permit is ready, you will be notified via email that the permit is ready for pick up as well as the final amount of the permit fee.

Building permit fees are based on cost of construction. At the time of application, you will provide us with your estimated cost of construction and our plan reviewers will calculate an estimated cost of construction per ICC Building Safety Journal. The higher of these two estimates will be multiplied by 0.73%; this amount, or the minimum permit amount, whichever is higher, is the building permit fee that will be charged. There may be other fees associated with your permit, such as floodplain permit fees, land disturbance fees, and other fees as applicable.


At least one inspection will be required. When the permit is issued, the necessary inspections required will be listed on your permit card. At the inspector's discretion, some inspections may not be applicable to the particular permit in question. The inspector will note those inspections are "N/A" at a later date.

Inspections must be called into the office by 3 p.m. the business day prior to your requested inspection date. To schedule your inspection, call 636-949-7345. If it is necessary to cancel or change your inspection, please do so as soon as possible. Also, please remember to post your permit so that it is visible from the street.

Where Can I Locate My Swimming Pool/Hot Tub/Spa?

Swimming pools/hot tubs/spas and any attached decking must be located such that the edge of the pool or attached decking will be no closer than five (5) feet from the side property lines, and no closer than ten (10) feet from the rear property line of the lot. A pool is not allowed in the front yard except for corner and through lots.

Corner and through lots exception: On any lot with two (2) or more frontages, private swimming pools/hot tubs/spas, attached decking and any fencing as required by Chapter 500, Ordinances of St. Charles County, Missouri, are permitted within the front yard that the principal residence does not face, provided that there are not principal structures within the same block that face that street or direction. The pool/hot tub/spa and attached decking must be located a minimum of ten (10) feet from the street right-of-way line that the principal residence does not face.

Exception for lots zoned A-Agricultural and RR-Residential District: In the A-Agricultural District and RR-Residential District where lots or parcels of ground are 3 acres in size or larger, a pool and attached decking must be set back a minimum of ten (10) feet from the side and rear property lines.`

Please note that pools/hot tubs/spas are not allowed to be located in any type of easement, over a septic system, or over any property line.

Electric and Barrier Requirements

Please examine these requirements carefully, as the barrier/fence is the most misunderstood aspect of pool installations
  1. All pools in excess of 24 inches in depth require a 4 foot high barrier surrounding the pool area or yard.
  2. The top of the barrier shall be at least 48 inches above finished grade and should be measured on the outside of the fence. The maximum clearance between finished grade and the bottom of the barriers shall be 2 inches.
  3. Solid barriers shall not contain indentation or protrusions. Barriers containing horizontal members spaces less than 45 inches apart must have those members located on the side of the barrier facing the pool. Decorative cutouts may not exceed 1 ¾ inches in width. Spacing between vertical members may not exceed 1 ¾ inches, as well.
  4. Where the barrier is composed of horizontal and vertical members and the distance between the tops of the horizontal members is 45 inches or more, spacing between vertical members shall not exceed 4 inches. The mesh of chain link fences must not exceed 2 ¼ inches square unless the fence is provided with slats fastened at the top and bottom , which reduce the openings to no more than 1 ¾ inches.
  5. All access gates must swing out away from the pool, be self-closing, and self-latching. Secondary gates for utility use must comply with this code or be locked at time of final inspection.
  6. The gate latch must be a minimum of 54 inches above grade. If lower, it must be on the pool side of the gate, at least 3 inches below the top of the gate, and any opening within 18 inches of the latch must not be larger than ½ an inch.
  7. Where an above ground pool is used as a barrier and the means of access is a ladder or steps, then the steps shall be capable of being secured, locked, or removed to prevent access. 
  8. Where a wall of a dwelling serves as part of the barrier, doors with direct access to the pool through that wall shall be equipped with an alarm which produces an audible warning when the door and/or its screen, if present, are opened. The alarm shall be listed and labeled in accordance with UL 2017. The deactivation switch(es) shall be located at least 54 inches (137.2 cm) above the threshold of the door.
  9. A receptacle that provides power for a pump motor shall be permitted between 6 and 10 feet from the inside wall of the pool and shall be GFCI protected and a single locking and grounding type. Pump receptacle does not have to be a locking type if it is more than 10 feet from inside the pool wall. All other receptacles must be not less than 6 feet from the inside walls of pools and outdoor spas and hot tubs.
  10. For all pools, outdoor spas, and hot tubs, at least one general purpose 125-volt 15 or 20 ampere receptacle shall be located a minimum of 6 feet from and not more than 20 feet from the in inside of the pool wall and be GFCI protected. This receptacle must be not more than 6 feet 6 inches above floor platform or grade level serving the pool, spa, or hot tub.
  11. Table E4203.5 in the IRC states overhead power conductors must be at least 22.5 feet clearance in any direction to the water level, edge of water surface, base of diving board or permanently-anchored raft. Clearance in any direction from a diving platform is 14.5 feet.
  12. If the house is on septic, layout must be approved by Building Division (sanitarian).
  13. All in-ground pools require a Missouri Architect or Engineer’s original seal, date, and signature on the drawings.
  14. All fencing and barriers must be in place before filling pool with water. 


Please contact the St. Charles County Building and Code Enforcement Division at 636-949-7345 or bce@sccmo.org.