Roofing Permit (Reroof) in Longmont, Colorado
Required for roof replacement and repair in Longmont. Governed by the City's Roofing Guidelines for Commercial and Residential Projects, the 2021 IBC/IECC (commercial), and the 'one square' rule requiring full roof replacement once repair exceeds 100 sq ft.
Verified 2026-07-01 · Source
When you need this permit
- '1 Square' rule (in effect since 2012): if more than 100 sq ft (one roofing square) requires repair/replacement, the ENTIRE roof must be replaced, not just the affected plane
- Overlay (roofing over an existing layer) is NOT allowed — tear-off required
- Drip edge required at both eaves and rakes
- All roofing must carry a sustained wind warranty of 110 mph minimum; 3-tab shingles not allowed unless laminated
- Residential: homeowner may pull a roof permit without a contractor's license, provided the house is their primary residence and no contractor performs the work
- Commercial (including apartments/condos): requires a Class D-2 licensee (no additional test required for this class); must comply with the 2021 IBC and IECC, minimum R-30 insulation above deck
- Mid-roof inspection required on built-up commercial roofs before dry-in and when above-deck insulation or sheathing is installed; ladder must be sound, secured, and extend safely above the eave
Required documents
- Req
Roofing Permit Application (via ACA portal)
Online application through Accela Citizen Access
- Opt
Roofing Guidelines for Commercial and Residential Projects
City of Longmont's roofing-specific requirements document covering overlay rules, wind warranty, drip edge, and inspection sequencing
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Roofing Permit — valuation/contract-based (Primary Fee Schedule) | Assessed on the actual contract amount of the roofing work, applied against the Primary Fee Schedule's valuation-based Building Permit Fee table (from $27.00 minimum up to $6,448.55 + $4.20 per additional $1,000 over $1,000,000) | City of Longmont FY2026 Planning & Development Services Fee Manual (effective 3/24/2026), 'Other Permits — Residential/Commercial' table + footnote (PDF p.17-18): re-roofing is not one of the itemized flat-fee line items, so it falls under the manual's express catch-all — 'Fees for plumbing permits, mechanical permits, electrical permits, and other miscellaneous permits and commercial work not listed above shall be based on actual contract amount of the work from the primary fee table.' The Primary Fee Table itself (Building Permit Fees Overview, PDF p.6) is a published valuation/contract-amount schedule, making this a grounded, citable fee rather than an unpublished figure. |
| Plan Review Fee | 50% of the Building Permit Fee | FY2026 Fee Manual, Plan Review Fees table — same residential plan review rate applied to other valuation-based permits (e.g. new construction, additions/remodels) |
Review timeline
~0–0 business days
Typical estimate — confirm current times with the Longmont building department
Inspection process
- 1
Mid-Roof (commercial built-up roofs only)
Required before dry-in and when above-deck insulation or roof sheathing is installed
- 2
Final
Completed roof — verify flashing, drip edge, underlayment, installation quality
Tips
- Longmont's 'one square' rule is stricter than many jurisdictions' partial-reroof allowances — more than 100 sq ft of repair triggers a full roof replacement requirement, not just the damaged section.
- No overlay is allowed in Longmont — every reroof is a tear-off down to the deck.
- Residential homeowners can self-permit a reroof on their own primary residence without hiring a licensed contractor, but the 110 mph wind-warranty and no-overlay rules still apply.
Frequently asked questions
- Can I put new shingles over my existing roof in Longmont?
- No. Overlay is not allowed over an existing roof in Longmont — a full tear-off is required per the City's Roofing Guidelines for Commercial and Residential Projects.
- Do I have to replace my whole roof if only part of it is damaged?
- If more than 100 square feet (one roofing square) requires repair or replacement, City of Longmont's 'one square' rule (in effect since 2012) requires replacing the entire roof, not just the damaged area or plane.
Sources & verification
Verified against official sources. Last reviewed 2026-07-01.
- City of Longmont — Building Services (Building Inspection Division), Development Services Center — official building department
- Roofing Guidelines for Commercial and Residential Projects — City of Longmont
- City of Longmont FY2026 Planning & Development Services Fee Manual (effective 3/24/2026, PDF)
Fees, timelines, and adopted codes are researched from each jurisdiction's published records — see how we verify. Requirements change and vary by project, so always confirm the current details with the Longmont building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.
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