How long does a deck or addition permit take to review in Centennial?

Additions are reviewed in 10 business days after the plan review fee is paid; decks, patio covers, and basement finishes are reviewed in 5 business days after the plan review fee is paid. Source: City of Centennial Building Permit Review Schedule.

Residential Alteration / Addition / Remodel Permit in Centennial, Colorado

Verified

Required for additions, remodels, decks, basement finishes, and structural alterations to existing one- and two-family dwellings in Centennial ('Residential Alterations' classification, which includes decks that add to the building footprint). Reviewed against the City's currently adopted 2021 IRC.

Verified 2026-07-03 · Source

From$23.50Building Permit Fee — valuation-based (same schedule as new construction) — see all 2 fees below

When you need this permit

Building permit required for removing/reconfiguring existing spaces, extending existing spaces, or renovating existing spaces to include additions, remodels, and decks that add to the building footprint, per the City's Building Permit Classifications page
Basement finish, additions, and temporary/accessory structures are reviewed under separate review-timeline tracks from general 'Alterations' (see reviewTimelineDays and tips)
Design must meet Centennial's local amendments: 30 psf non-reducible roof snow load, 115 mph design wind speed
PDF plans and/or site plans required for additions and remodels
Homeowners may self-perform and pull their own permit only if they occupy the residence and submit a signed Homeowners Agreement/Affidavit

Required documents

Required
Building Permit Application
Submitted online through the Centennial Self-Service Portal
Optional
Single Family Residential Addition Guide (PDF, 767KB)
City of Centennial guide for residential addition submittals
Optional
Single Family Basement Finish Guide (PDF, 1MB)
City of Centennial guide for basement finish submittals
Optional
Single Family Uncovered Decks and Porches Guide (PDF, 577KB)
City of Centennial guide for uncovered deck/porch submittals
Optional
Single Family Residential Detached Garage Guide (PDF, 602KB)
City of Centennial guide for detached garage submittals
Optional
Residential Patio Covers and Carports Guide (PDF, 544KB)
City of Centennial submittal guide for patio covers and carports, based on the 2021 IRC; includes required minimum 8-inch pier diameter, roof pitch, underlayment and fastening details; sides of a carport closer than 3 ft to the property line must be enclosed with a solid 1-hour fire-rated wall per Alternate Details B2/C, and at least two sides must remain open

Fee schedule

Fee type	Amount	Notes
Building Permit Fee — valuation-based (same schedule as new construction)	$23.50 minimum ($1-$500 valuation), scaling per the Building Permit Fee Schedule table	City of Centennial Building Permit Fee Schedule (PDF)
Building Plan Review Fee	65% of the Building Permit Fee	City of Centennial Building Permit Fee Schedule (PDF)

Review timeline

5–10 business days

Centennial’s published plan-review target

Inspection process

1
Footing/Foundation
Required before concrete pour for deck posts, garage foundations, or addition footings
2
Framing
Structural framing and connections to the existing structure
3
Final
All work complete per approved plans

Tips

Per the City's Building Permit Review Schedule: Additions and swimming pool/spa permits are 10 business days after the plan review fee is paid; Alterations, basement finish, deck/pergola/patio cover, and other miscellaneous residential permits are 5 business days after the plan review fee is paid.
Re-submittals/revisions are reviewed within 5 business days for all permit types except new construction (10 business days).
All lumber exposed to the elements on patio covers/carports must be naturally decay-resistant or pressure-treated, per the City's Residential Patio Covers and Carports guide.
Pre-submittal meetings are highly encouraged and can be scheduled by calling 303-754-3321.

Frequently asked questions

How long does a deck or addition permit take to review in Centennial?: Additions are reviewed in 10 business days after the plan review fee is paid; decks, patio covers, and basement finishes are reviewed in 5 business days after the plan review fee is paid. Source: City of Centennial Building Permit Review Schedule.

Sources & verification

Verified against official sources. Last reviewed 2026-07-03.

Fees, timelines, and adopted codes are researched from each jurisdiction's published records — see how we verify. Requirements change and vary by project, so always confirm the current details with the Centennial building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.

Other permits in Centennial

Residential Building Permit (New Construction)Electrical Permit Plumbing Permit Mechanical / HVAC Permit Re-Roofing Permit Solar Photovoltaic (PV) Permit Demolition Permit Fence Permit Accessory Dwelling Unit (ADU) Permit

Residential Alteration / Addition / Remodel Permit in other cities

Arvada, Colorado Aurora, Colorado Boulder, Colorado Broomfield, Colorado Colorado Springs, Colorado Denver, Colorado Fort Collins, Colorado Grand Junction, Colorado

Compare residential alteration / addition / remodel permit fees across Colorado →

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