Residential Addition / Remodel / Alteration Permit in Grand Junction, Colorado

Single-story detached accessory structures (sheds) 200 sq ft or less do not require a building permit. Decks no more than 30 inches above grade at any point also do not require a permit. Larger sheds, carports, or higher decks require a Mesa County Building Department permit; those under 400 sq ft and accessory to a residence have a flat $50 fee. Source: Mesa County 'Items that DO NOT REQUIRE a building permit' notice and Building Department Fee Schedule.

In Grand Junction, the published Decks, Patio Covers, Storage Sheds & Open Carports — under 400 sq ft, accessory to residence is: $50.00 flat fee. Additional published fees: Decks, Patio Covers, Storage Sheds & Open Carports — over 400 sq ft — Valuation calculated at $15.00 per sq ft, then Table 2 permit fee schedule applied; Remodel/Alteration Permit Fee — valuation-based (actual labor + material cost) — $50.00 minimum (up to $1,200 valuation), scaling per Table 2 (e.g., $68.00 for first $2,000 plus $9.90 per additional $1,000 up to $25,000); Change in Use/Occupancy Valuation Permit Fee — under $2,000 valuation — $50.00. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

Grand Junction does not publish a plan-review timeline for this permit. Contact Mesa County Building Department (Community Development Department) at (970) 244-1631 for current turnaround.

You'll need: Application for Permit to Build; Residential Building - Checklist. Depending on your project, Grand Junction may also ask for: Supplemental Permit Narrative. See the required-documents checklist on this page for details on each.

Grand Junction requires 3 inspection(s) for a residential addition / remodel / alteration permit, in order: Foundation/Footer, Framing, Final. Schedule each through Mesa County Building Department (Community Development Department) ((970) 244-1631).

Apply through Mesa County Building Department (Community Development Department) at 200 S. Spruce Street, Grand Junction, CO 81501 (mailing: PO Box 20,000-5005, Grand Junction, CO 81502-5001). Phone: (970) 244-1631, email: mccomdev@mesacounty.us. Office hours: Monday - Friday, 8:00 a.m.-5:00 p.m.; permit issuance after 4:30 p.m. is on a limited basis and no multiple permits are issued after 4:30 p.m. (Source: Mesa County Building Department Fees page). Official information: https://www.mesacounty.us/departments-and-services/community-development/building.

Grand Junction, Colorado has adopted: AUTHORITY MODEL NOTE: Colorado has no statewide building code (home-rule state); each city or county adopts and amends its own. Colorado does set a statutory statewide energy-code floor via HB22-1362 (requiring jurisdictions that adopt a building code to also adopt the most current or immediately preceding edition of the IECC on a rolling basis) and separate ADU-related state statutes (e.g., HB24-1152, concerning local regulation of accessory dwelling units in certain jurisdictions). Applicants in any Colorado city should always confirm the specific edition and amendments in force locally — never assume a statewide default.; The City of Grand Junction does NOT run its own building-permit program. Per the City's own Engineering & Transportation Permits page: 'The Mesa County Building Department serves unincorporated Mesa County as well as the towns of Debeque, Collbran, Palisade, and the cities of Fruita and Grand Junction.' Building, plumbing, electrical, and mechanical permits within Grand Junction city limits are issued and inspected by the Mesa County Building Department, part of Mesa County's Community Development Department (Building - Planning - OWTS - Code Compliance). Contractor licensing for work within Grand Junction city limits is also administered by Mesa County on the City's behalf. Source: City of Grand Junction Engineering and Transportation Permits page (gjcity.org/355/Permits) and Mesa County Building Department 'Building Department' landing page (mesacounty.us building department, description: 'Our department performs inspections, supplies permits, and current codes for building projects in our County, the towns of De Beque, Collbran, Palisade, and the City of Grand Junction.'); Zoning, land-use planning, ADU incentive programs, and planning clearances remain a City of Grand Junction (Community Development / Planning Division) function even though building-code enforcement is county-run; a Planning Clearance from the City is a prerequisite for many Mesa County building permits on property within city limits (see ADU and solar permit types below).; Mesa County Building Department began enforcement of a new adopted-code cycle effective September 1, 2025 (per Mesa County Ordinance adopting and amending Building Codes, in compliance with HB21-1110). Source: Mesa County Adopted Codes and Regulations page.; 2024 International Building Code (IBC) — Mesa County adopted code, effective enforcement September 1, 2025; 2024 International Existing Building Code (IEBC) — Mesa County adopted code, effective enforcement September 1, 2025; 2024 International Residential Code (IRC) — Mesa County adopted code, effective enforcement September 1, 2025; 2024 International Mechanical Code (IMC) — Mesa County adopted code, effective enforcement September 1, 2025; 2021 International Energy Conservation Code (IECC) — Mesa County adopted code; per the County's IECC Energy Code Requirements page, enforcement of the 2021 IECC began September 1, 2025 'in compliance with House Bill 22-1362' (Colorado's statewide energy-code floor statute); Colorado Model and Solar Ready Code — state-adopted, referenced on Mesa County's Adopted Codes page as a state-level code Mesa County enforces alongside its own IECC checklist (Colorado Model Electric and Solar Ready Code, CMESRC); Colorado Plumbing and Fuel Gas Code — state-adopted, referenced on Mesa County's Adopted Codes page; 2021 International Fuel Gas Code (IFGC) — state-adopted per Mesa County's Adopted Codes page; 2021 International Plumbing Code (IPC) — state-adopted per Mesa County's Adopted Codes page; 2023 National Electrical Code (NEC) — state-adopted per Mesa County's Adopted Codes page (no direct link published by the County as of this review; also cited as the applicable electrical code in Mesa County's Photovoltaic Guide alongside 2018 IBC/IRC/IEBC/IFC for that guide's own applicable-codes list, which had not yet been updated to reference 2024 editions as of the guide's July 2023 revision date); Note on internal inconsistency found during verification: Mesa County's standalone Photovoltaic Guide (rev. 7/20/2023) lists '2018 IBC, IRC, IEBC, IFC, and 2023 NEC' as its applicable codes, which predates the County's September 1, 2025 adoption of the 2024 IBC/IRC/IEBC cycle documented on the Adopted Codes and Regulations page. Applicants should confirm current code edition with the Building Department (970-244-1631) at time of solar application, since the PV guide has not been visibly reissued since the 2025 code-cycle update.; Mesa County Building Department Reroof Policy (revised 9/2025) requires reroofs to comply with Chapter 9 of the 2024 IRC or Chapter 15 of the 2024 IBC, confirming the 2024 cycle is the current enforced edition for those chapters as of this review.. Local amendments apply — see the Grand Junction overview page for the full list.