City of Longmont (Boulder County portion)

Longmont requires permits for all commercial construction, new construction, additions and alterations, changes to electrical, gas, mechanical, or plumbing systems, and repairs involving structural members.

• Exempt Detached accessory buildings less than 120 square feet, subject to zoning setback compliance

Note: Additional exemption categories were not clearly summarized on the public pages reviewed; Longmont directs applicants to call Building Services if unsure.

Building code

2021 International Codes effective January 1, 2022, with 2023 NEC adopted July 24, 2024; city notes 2024 code adoption targeted by May 1, 2026.

Permit validity

Not clearly summarized on the public permit page reviewed.

Owner-builder

Homeowners may act as their own general contractor only if the property is their primary residence and is not a rental and not intended for resale or flipping.

Contractor requirements

Anyone performing contracting work in Longmont must hold a valid Longmont contractor license; licensed subcontractors are required for homeowner permits, and electrical contractors pull their own permits under state rules.

Source: City of Longmont Building Services ↗

1. 01
   Review permit type, adopted codes, and contractor rules on Building Services pages.
2. 02
   Create a Citizen Portal account and select the correct permit type.
3. 03
   Submit the permit application and required plans and supporting documents.
4. 04
   Address review comments and provide any required contractor or technical documents.
5. 05
   Pay permit fees and any city use tax due.
6. 06
   Keep approved plans and permit card on site and schedule inspections online or by phone until final approval.

Source: City of Longmont Building Services ↗

Permit fees and Longmont and Boulder County construction use tax may apply.

Fees change periodically. Confirm at the official fee schedule ↗ (effective 2025) before budgeting.

• Online inspection scheduling portal (online)
• 303-651-8332 (phone)

Scheduling deadline

Requests due before 4 p.m. for the next business day

Inspection hours

Homeowners may request morning 7 a.m. to 12 p.m. or afternoon 12 p.m. to 5 p.m.

Typical sequence: Footing, foundation, rough framing and trades, insulation if needed, drywall nail if required, then final inspection

A $47 reinspection fee may apply if animals are loose or the site is not inspection-ready

Source: City of Longmont Building Services ↗