Denver, Colorado Building Permits
Denver, Colorado building permit guide with timelines, fees, zoning, 2022 codes, snow, wind, floodplain, and plan requirements for projects.
Wind
ASCE 7 basic wind speed: commonly 115 mph ultimate 3-second gust for Risk Category II buildings in Denver, with final design based on the adopted code, exposure category, building height, risk category, and site conditions.
Snow Load
Ground snow load: commonly 30 psf in Denver. Roof snow load must be calculated using the adopted code, exposure, thermal condition, roof slope, drifting, and unbalanced snow provisions.
Flood
Denver participates in FEMA’s National Flood Insurance Program and uses FEMA Flood Insurance Rate Maps plus local floodplain regulations. Properties in Special Flood Hazard Areas, regulatory floodplains, or near waterways such as the South Platte River, Cherry Creek, Lakewood Gulch, or Harvard Gulch may need floodplain review, elevation certificates, flood-resistant construction, and separate floodplain permits.
Earthquake
Seismic Design Category is typically B for many standard low-rise buildings in Denver, but the final category depends on mapped spectral response values, site class, risk category, and structural system. Commercial and engineered projects should verify seismic parameters under the adopted IBC/ASCE 7 provisions.
Wildfire
Most of Denver is urban and not regulated like foothills wildland-urban-interface communities, but wildfire and urban fire exposure can still affect site planning, vegetation management, roofing, exterior materials, and fire department access. Projects must comply with the Denver Fire Code, defensible access requirements, and any site-specific fire safety conditions.
Building Department
Denver Community Planning and Development, Development Services / Building Permits and Inspections
Approval Timeline
Many quick permits can be issued the same day or within 1-3 business days if the contractor is licensed and the scope is eligible. Residential remodels, decks, additions, ADUs, and new one- or two-family projects commonly take 2-6 weeks for initial review depending on workload and completeness. Commercial tenant improvements often take 4-8 weeks, while new commercial buildings, mixed-use projects, landmark properties, floodplain sites, or projects needing multiple agency reviews can take 8-12+ weeks plus revision cycles.
Common Requirements
Typical submittals include a completed permit application, project valuation, contractor license information, site plan, floor plans, elevations, structural framing plans, foundation details, wall sections, energy code documentation, and manufacturer specifications for major systems. Additions and new buildings often require a survey or improvement location certificate, soils/foundation information, drainage and grading information, wastewater/SUDP review, and structural calculations. Commercial projects usually require code analysis, occupancy classification, construction type, egress plans, accessibility details, fire-resistance assemblies, mechanical/electrical/plumbing drawings, and COMcheck or equivalent energy compliance documentation.
Zoning Information
Denver uses a form- and context-based zoning code, the Denver Zoning Code, with neighborhood contexts, zone districts, building forms, setbacks, height limits, bulk plane controls, parking standards, use limitations, and design standards. Properties may also be subject to old Former Chapter 59 zoning, landmark district rules, overlays, view planes, conservation overlays, floodplain requirements, or small-lot/ADU limitations. Zoning approval is often required before or concurrently with building permit review.
Permit Costs
Denver permit costs are valuation-based and may include building permit fees, plan review fees, city use tax, technology fees, wastewater/SUDP fees, trade permit fees, and separate right-of-way or zoning fees. Simple trade or reroof permits may be roughly $75-$400. Small residential remodels and decks commonly run a few hundred to $1,500+ in permit-related fees. Additions, ADUs, new homes, and commercial tenant finishes can range from several thousand dollars to tens of thousands depending on valuation and required reviews. Always use Denver’s current fee schedule for final pricing.
Engineering Requirements
Colorado-licensed professional engineer stamps are commonly required for structural changes, new foundations, retaining walls, significant beams or headers, second-story additions, roof framing changes, underpinning, unusual soils, commercial structural work, and projects using non-prescriptive construction. Denver may also require engineer-sealed calculations for lateral design, snow/wind loads, tall walls, steel framing, concrete design, and delegated systems such as trusses or special foundations.
Local Code Adoption
Denver has adopted the 2022 Denver Building and Fire Code with local amendments, generally based on the 2021 I-Codes, including IBC, IRC, IEBC, IECC, IMC, IPC, IFGC, and IFC, plus the Denver Green Code and locally adopted electrical provisions. Applicants should confirm the currently effective code cycle and transition rules before submitting.
Typical Projects
Common Denver permit projects include basement finishes, kitchen and bath remodels, additions, accessory dwelling units, detached garages, decks, rooftop solar, reroofs, structural wall removals, egress windows, tenant improvements, multifamily renovations, mixed-use infill, restaurant build-outs, and adaptive reuse projects in older commercial buildings.