Littleton enforces the 2024 IRC with City Code amendments, and replacing more than one square (100 square feet) of asphalt, metal or tile counts as a roof replacement that must cover the whole roof. Policy 24-001 also requires a full tear-off, six nails per shingle and an ice barrier at the eaves.
General information, read from the official sources listed below on 2026-10-28. Codes and local policies change, so confirm the rules for your address with the building department before work starts.
Littleton roof code data table
| Item | Littleton |
|---|---|
| Adopted IRC edition | 2024 IRC with City Code Title 4, Chapter 1 amendments (Policy 24-001 cites 2024 IRC sections). Source: Littleton Policy 24-001, 5th revision (5/21/2026) |
| Adopted IBC edition | 2024 IBC (cited in Policy 24-001). Source: Littleton Policy 24-001, 5th revision (5/21/2026) |
| Adoption or effective date | Not fully verified: Adoption date not stated in the sources read. Policy 24-001 is in its 5th revision, dated 5/21/2026. Source: Littleton Policy 24-001, 5th revision (5/21/2026) |
| Roofing amendments and local policies | Asphalt shingles ASTM D7158 Class H (up to 150 mph), six nails per shingle; metal UL 580 / ASTM E1592 150+ mph; tile ASTM C1167 150+ mph high-wind install. Manufacturer specs required at permit intake. Board gaps over 1/2 in overlaid or replaced with 3/8 in minimum panels nailed 6 in / 12 in. Closed valleys: 36 in ice barrier. Drip edge at eaves and rakes. No shingles below 2:12; double underlayment or ice barrier from 2:12 to 4:12. Ventilation not reduced unless it meets 1/150, or 1/300 with all conditions. Tile reuse only if the manufacturer allows and the warranty stays valid. Mineral-surfaced roll roofing not permitted. Source: Littleton Policy 24-001, 5th revision (5/21/2026) |
| Ice barrier rule | Required: ASTM D1970 at the eaves of all conditioned structures, at least 2 ft inside the exterior wall line. Source: Littleton Policy 24-001, 5th revision (5/21/2026) |
| Ground snow load | 40 psf ground snow, non-reducible. Source: Littleton Policy 24-001, 5th revision (5/21/2026) |
| Design wind speed | 136 mph ultimate design wind speed. Source: Littleton Policy 24-001, 5th revision (5/21/2026) |
| Reroof permit trigger | Removing or replacing more than one square (100 sq ft) aggregate is a roof replacement, needs a permit before work starts and, for asphalt, metal and tile, must be a full roof. New roof planes from an addition are the exception. Source: Littleton Policy 24-001, 5th revision (5/21/2026) |
| Layers allowed | One. Full tear-off to deck; no overlays for asphalt, metal or tile. Membrane overlays are allowed. Source: Littleton Policy 24-001, 5th revision (5/21/2026) |
| Wildfire / WUI code status | Properties in a designated Wildfire Urban Interface hazard zone may face additional requirements (Policy 24-001). Source: Littleton Policy 24-001, 5th revision (5/21/2026) |
| Inspection requirements | Sheathing-fastening inspection before underlayment whenever sheathing is overlaid or replaced. Final roof inspection required, with an OSHA ladder set 3 ft above the eave. The permit must be posted where it is visible from the street. Source: Littleton Policy 24-001, 5th revision (5/21/2026) |
| Permitting office | City of Littleton Building Division. Source: Littleton building codes, amendments and policies |
What it means for a homeowner reroofing in Littleton
Littleton has the tightest repair line on the Front Range. Anything over one square of asphalt, metal or tile is treated as a replacement, and a replacement must be the whole roof. A hail claim that covers two slopes of a Littleton home therefore runs into a city rule that requires the full roof; the scope written for the job has to reflect that.
The product has to be proven at intake. Shingles must carry the Class H wind label, metal must show 150 mph testing, and the permit is not accepted without the manufacturer documentation. Six nails per shingle is a city rule, not an upgrade.
If the house has solar, the roof permit waits until a city-licensed solar contractor pulls its own removal and reinstall permit. Build that time into the schedule.
Common inspection failures in Littleton
These are items the building department's own code or handouts say it checks or rejects. No public data ranks how often each one fails, so the order means nothing.
- Permit not posted where it can be seen from the street.
- No OSHA ladder in place, or no access through a fenced yard.
- New sheathing covered before the fastening inspection.
- Four-nail pattern instead of six nails per shingle.
- Shingles without the Class H wind label.
- Attic ventilation reduced below the existing condition.
- Solar panels removed by the roofer instead of a licensed solar contractor under permit.
Steps to permit a reroof in Littleton
- Measure the damaged area; over one square means a full roof.
- Submit the manufacturer specs showing Class H (or the metal or tile rating) with the permit.
- If there is solar, have the solar contractor pull the removal permit first.
- Book the sheathing inspection if any decking is overlaid or replaced.
- Set an OSHA ladder 3 ft above the eave for the final inspection.
Related pages
- Littleton roofing
- Littleton Policy 24-001 explained section by section
- Colorado Wildfire Resiliency Code on a reroof
- Roof replacement
- Roof repair
- Hail damage repair
- Free roof inspection
- Compare roof codes by jurisdiction
Hail history by ZIP in Littleton: 80120 (Littleton)
Sources
Compiled by Integrity Roofing and Painting, roofing Colorado homes since 1990 (36 years in business). We are an Owens Corning Platinum Preferred contractor with 650+ Google reviews, and our repair scopes follow the local code and the manufacturer's installation and warranty requirements. We do not issue permits or rule on code; the building department does.
