Hot Tub Rules: Boulder vs Longmont
How do hot tub rules rules compare between Boulder, CO and Longmont, CO?
Boulder has fewer restrictions than Longmont.
Boulder, CO
Boulder County
Boulder regulates hot tub and spa installation including electrical permits, barrier requirements, and placement rules.
View full Boulder rules →Longmont, CO
Boulder County
Hot tubs and spas require a building permit in Longmont and must be enclosed by a 4-foot fence with openings under 4 inches per LMC 15.05.100 - OR they may use a lockable safety cover capable of supporting at least 150 pounds, which must be locked when the spa or hot tub is not in use. Electrical work must comply with the adopted 2020 NEC Article 680 (GFCI protection and bonding).
View full Longmont rules →Key Facts Comparison
| Fact | Boulder | Longmont |
|---|---|---|
| Electrical Permit | Required for 240V | - |
| Safety Cover | May satisfy barrier rules | - |
| Setbacks | From property lines | - |
| GFCI | Required | - |
| Permit Required | - | Yes - hot tubs/spas classified as 'appliances' requiring permit |
| Barrier Option 1 | - | 4-foot fence with less-than-4-inch openings (LMC 15.05.100) |
| Barrier Option 2 | - | Lockable cover supporting at least 150 lb, locked when not in use |
| Cover Standard | - | ASTM F1346 (2021 IRC App. V) |
| Electrical Code | - | 2020 NEC Article 680 - GFCI + bonding |
| Inspection | - | Final required before use |
| Contact | - | Building Inspection (303) 651-8332 |
Highlighted rows indicate differences between cities.
Boulder FAQ
Do I need a permit for a hot tub?
Yes, Boulder typically requires an electrical permit for the 240V circuit. A building permit may also be needed depending on placement.
Does my hot tub need a fence around it?
A locking safety cover may satisfy barrier requirements in Boulder. Check local code for specific requirements.
Longmont FAQ
Do I need a permit for a hot tub in Longmont?
Yes. Longmont's permit-requirements page classifies hot tubs as appliances requiring a building permit, with electrical and final inspections by Building Services.
Do I have to fence in my hot tub?
Not if you use a locking safety cover. LMC 15.05.100 allows spas and hot tubs to substitute a lockable cover capable of supporting at least 150 pounds (the 2021 IRC references ASTM F1346) in place of a 4-foot fence, provided the cover is locked whenever the tub is not in use.
What electrical rules apply to my hot tub?
All hot tub electrical work must comply with the 2020 National Electrical Code Article 680, which Longmont adopted with the 2021 I-Code package. That means GFCI protection on the spa circuit and equipotential bonding of the spa shell and metal parts. A licensed electrician must pull the permit and pass inspection.
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