# Denver Building Code Amendments Explained (2026) > Denver's 2025 Building Code, 2024 I-Code baseline, effective date, local structural and green-code layers, and a permit-start amendment checklist. - Canonical: https://harth.build/resources/building-codes/cities/denver-co/ - Last updated: 2026-09-05 ## Direct answer and reference scope Denver Building Code Amendments Explained (2026) is a Harth adoption and amendment guide for Denver, Colorado. Denver's 2025 Building Code, 2024 I-Code baseline, effective date, local structural and green-code layers, and a permit-start amendment checklist. Use the [Denver Community Planning and Development](https://www.denvergov.org/My-Property/Remodeling-and-Construction/Building-Codes-Policies-Guides) to confirm the code edition currently adopted for the project, and compare the model text with state amendments, local amendments, effective dates and the permit authority's interpretation. The [ICC code library](https://codes.iccsafe.org/codes) is the model-code publication path. This Harth page summarizes adoption records and amendment sources; it does not reproduce the controlling code, provide a legal opinion or confirm which edition controls a particular address. Record the project jurisdiction, application date, occupancy, construction type and amendment set before relying on a section. Where this page conflicts with an official publication or the authority having jurisdiction, the official source controls. _Authored and prepared by Harth from the linked agency records. Review scope: adoption status and source paths verified; project-specific applicability and local interpretation require AHJ confirmation._ ## Direct answer Denver’s current code is the **2025 Denver Building and Fire Code**, effective December 31, 2025. It incorporates the **2024 I-Codes**, except that the Denver Energy Code is based on the **2021 IECC**. Denver adopted a second printing in November 2025, so use that publication rather than an earlier legislative draft. ![Labeled code-chapter diagram: Denver Building Code Amendments Explained](https://efwwel0vyt9vy5so.public.blob.vercel-storage.com/images/building-codes/cities/denver-co/index/diagram-1344.webp) *Denver's 2025 Building Code, 2024 I-Code baseline, effective date, local structural and green-code layers, and a permit-start amendment checklist.* ## What “2025 Denver code” means | Layer | Project use | Official path | | --- | --- | --- | | 2024 I-Codes | Model baseline for building, existing building, fire and related disciplines | [ICC code library](https://codes.iccsafe.org/codes) | | 2025 Denver Building Code | Local administrative and technical amendments | [Denver Building Codes, Policies and Guides](https://www.denvergov.org/My-Property/Remodeling-and-Construction/Building-Codes-Policies-Guides) | | Denver Energy Code | Denver amendments based on the 2021 IECC | Same city code page | | Denver Green Code | Mandatory provisions plus optional paths where selected | [Denver code and regulations index](https://www.denvergov.org/My-Property/Remodeling-and-Construction/Permit-Office/Code) | | Zoning and overlays | Separate controls for use, form, view planes, landmarks and design review | [Denver Zoning Code](https://www.denvergov.org/Government/Agencies-Departments-Offices/Agencies-Departments-Offices-Directory/Community-Planning-and-Development/Denver-Zoning-Code) | ## Local amendments that deserve an early design check - **Snow:** Denver moved to the ASCE 7-22 snow-load framework, with values that vary by location. Use the city’s current snow-load guidance and the ASCE tool path identified by Denver. - **Wind:** the Denver amendments retain location-dependent wind criteria; do not substitute a generic Colorado value. - **Uncovered parking decks:** Denver adds a specific combined snow/live-load provision for uncovered passenger-vehicle parking decks. - **Solar-ready loading:** the structural amendments coordinate solar-ready zones with the Denver Energy Code. - **Energy and green requirements:** because Denver’s energy baseline does not share the same model-code year as the other 2025 disciplines, record it separately on the code sheet. These are navigation flags, not substituted code text. Confirm the current value, map location, exception and referenced standard in the official second printing. Denver’s [2025 adoption presentation](https://denvergov.org/files/assets/public/v/1/community-planning-and-development/documents/ds/building-codes/code-adoption/2025_code_adoption_presentation.pdf) explains the major cycle changes. ## Denver amendment worksheet | Question | Project entry | | --- | --- | | Permit submission / vesting date | — | | 2025 second-printing publication checked | — | | Applicable 2024 model-code chapters | — | | Denver replacement or added sections | — | | Site snow and wind source | — | | Denver Energy Code path | — | | Mandatory Denver Green Code provisions | — | | Zoning, landmark, view-plane or design-review overlays | — | | Written CPD interpretation or approved modification | — | Archive a PDF or dated link for the exact printing used. Denver keeps older 2022 material online, and search results can surface the superseded edition ahead of the current one. --- - Continue in Harth (open this topic in the Harth agent): https://app.harth.build/agent?context=%2Fresources%2Fbuilding-codes%2Fcities%2Fdenver-co%2F - View this page in a browser: https://harth.build/resources/building-codes/cities/denver-co/ - All resources for agents: https://harth.build/llms.txt