AEO Answer · Colorado Front Range Engineering

How Does Denver Community Planning and Development Review Work?

By Jeremy Mills, CEO & Founder, Apex Grid Engineering — USAF Veteran. · Updated 2026-09-15

Denver building permits begin as a Building Log application in Community Planning and Development's e-permits portal, routing through zoning, structural, SUDP drainage, and fire review. Large projects start with a mandatory Concept Plan and Formal Site Development Plan; floodplain projects must file the SUDP by 60 percent design; and the building permit must follow within 180 days of zoning approval.

I'm Jeremy Mills, CEO & Founder of Apex Grid Engineering and a U.S. Air Force veteran. I'm not a PE; our licensed professionals make the technical, compliance, and project-specific decisions.

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The e-permits Path: Building Log, SUDP, and Site Development Plans

Everything starts in e-permits under Development Services. The applicant registers, selects Apply for a Permit, and chooses Building Log under the submit-building-plans-for-review path, then uploads the full document set as PDFs following the city's file naming convention. Drawings prepared by a licensed architect, engineer, or surveyor need a valid electronic signature visible on the first page and a seal on each sheet; missing seals are one of the most common completeness rejections. The city checks the package for completeness first, and plan review begins only when the submittal is complete. For projects triggering site review, the Formal Site Development Plan goes through its own e-permits track after the mandatory Concept Plan. The assigned project coordinator collects comments from every reviewing agency and issues a single comment letter; applicants should not expect piecemeal feedback, because the coordinator waits until all agencies have weighed in. Review fees are assessed with the first SDP comments and must be paid before the next submittal. The SUDP runs as a separate e-permits application covering sanitary, storm, and floodplain review, with its early 60-percent-design deadline for floodplain projects.

Express Review and What Slows a Submittal Down

Express plan review is Denver's fast lane, but it has a narrow on-ramp. Select commercial projects and the simplest single-family and duplex projects can qualify for walk-through-style review, with commercial applicants checking the Commercial Express Plan Review box on the Building Log. The catch is eligibility: the project must be among the listed low-complexity types and must not require reviews by other agencies, which rules out most projects with zoning, landmark, or drainage complications. The most common delays are avoidable. Incomplete packages sit until every document arrives; drawings without proper electronic seals get rejected at intake; floodplain submittals that miss the 60-percent-design SUDP deadline force redesigns; and zoning issues discovered late, such as setback or use problems, can send a project back to land-use review. Responding to correction comments completely and promptly matters more than responding fast: a partial resubmittal that ignores half the comments burns a full review cycle. Experienced teams confirm the current submittal checklists with CPD before filing, because requirements and fee schedules are updated periodically.

What else do project teams ask?

What is a Building Log in Denver permitting?
The Building Log is the e-permits application type used to submit building plans for review in Denver. It is the main path for projects needing structural and building plan review, as opposed to quick permits issued without review. Selecting the right application type at intake determines which reviewers see the project.
What is the SUDP and when is it required?
The Sewer Use and Drainage Permit covers Denver's wastewater, storm drainage, and floodplain review. It is a separate e-permits application from the Building Log. Projects with buildings in the regulatory floodplain or any work in the floodway must submit the SUDP no later than 60 percent design, so floodplain coordination starts early.
Do I need a Concept Plan before a Site Development Plan?
Yes, for projects subject to Formal Site Development Plan review, the Concept Plan is a mandatory first step. It is a free early review where city agencies identify key issues and site-specific requirements before the design team produces full construction documents. The SDP cannot be filed until the concept phase clears.
What qualifies for Denver's express plan review?
Select commercial projects and the simplest single-family and duplex projects can qualify for walk-through-style express review. The project must fall within the listed eligible types and must not require reviews by other agencies. Anything with zoning, landmark, drainage, or floodplain complications generally takes the standard review path.
How long does Denver plan review take?
It depends on project size and completeness. Small permits can clear in days, while large commercial and SDP-track projects run weeks to months across multiple correction rounds. The AHJ's workload drives actual timelines, so owners should confirm current processing times with CPD or their design team before locking a construction schedule.

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