Arvada Roofing Codes: Permits, Inspections, and Requirements
Adopted building and energy codes, permit rules, and roofing requirements for Arvada, Jefferson and Adams Counties. Rows below reflect our reading of the jurisdiction's own published sources, linked at the bottom of the page.
Building department
720-898-7620Inspection line
720-898-7630Permit line
720-898-7620Official department
Live code pageArvada roofing code requirements
- What this jurisdiction requires
- 2021 IBC and 2021 IRC
- What this jurisdiction requires
- 2021 IECC
- What this jurisdiction requires
- Yes
- What this jurisdiction requires
- Arvada has published a building code update that takes effect July 1, 2026. Confirm which edition applies to your permit date
- What this jurisdiction requires
- Class A
- What this jurisdiction requires
- One layer
- What this jurisdiction requires
- Required
- What this jurisdiction requires
- Required
- What this jurisdiction requires
- Ice barrier required at eaves per the IRC
- What this jurisdiction requires
- Two layers of underlayment
- What this jurisdiction requires
- One layer of underlayment
- What this jurisdiction requires
- Required where the roof meets a wall
- What this jurisdiction requires
- Required, installed to manufacturer specifications
- What this jurisdiction requires
- Required on new construction under the 2021 IECC
- What this jurisdiction requires
- Required per IRC attic ventilation provisions
| Requirement | What this jurisdiction requires |
|---|---|
| Current building code | 2021 IBC and 2021 IRC |
| Current energy code | 2021 IECC |
| Building permit required | Yes |
| Plans to update the code | Arvada has published a building code update that takes effect July 1, 2026. Confirm which edition applies to your permit date |
| Roof system fire rating (residential) | Class A |
| Maximum layers of asphalt shingles permitted | One layer |
| Requires drip edge | Required |
| Requires rake / gable metal edging | Required |
| Self adhering underlayment (ice and water shield) | Ice barrier required at eaves per the IRC |
| Underlayment required 2:12 up to 4:12 | Two layers of underlayment |
| Underlayment required 4:12 and above | One layer of underlayment |
| Kick-out required on step flashing | Required where the roof meets a wall |
| Requires ridge cap | Required, installed to manufacturer specifications |
| Blower door test when increasing ventilation to code | Required on new construction under the 2021 IECC |
| Requires soffit / eave vents | Required per IRC attic ventilation provisions |
Last checked September 2, 2026. This reflects published sources at that date, not an official ruling. Code adoptions change, so confirm with the Arvada building department before you pull a permit.
What Arvada requires, in plain language
Arvada builds to the 2021 IBC and 2021 IRC. That edition, not the newest code published nationally, is the rulebook an inspector in Jefferson and Adams Counties holds your roof to. Energy work on the same permit follows the 2021 IECC. Update status: Arvada has published a building code update that takes effect July 1, 2026. Confirm which edition applies to your permit date
Layer limit in Arvada: One layer. This is the line item that moves a bid the most. If your existing roof is already at the limit, the deck gets stripped before new material goes down, and the labor plus dump fees belong in the written price.
Underlayment and edge metal are where roofs fail inspection. Ice and water shield: Ice barrier required at eaves per the IRC. On 2:12 to 4:12 slopes: Two layers of underlayment. On 4:12 and steeper: One layer of underlayment. Drip edge: Required.
Ventilation and fire rating close out the file. Soffit and eave vents: Required per IRC attic ventilation provisions. Residential roof fire rating: Class A.
Arvada Building Services publishes its adopted codes and local design criteria on the linked page, including snow load and wind design values used for roof permits.
Sources
- https://www.arvadaco.gov/188/Building-Services
- https://www.arvadaco.gov/165/Adopted-building-codes-and-design-criter
These links go straight to the jurisdiction, so you always have the real-time source. Adoptions and amendments change on their schedule, not ours. Always confirm before permitting.
Last checked September 2, 2026. This is our best read of published sources, not an official ruling. Confirm with the Arvada building department before you pull a permit.