
Licensed Utah General Contractor
Commercial Construction in Utah
Allegiant Construction is a licensed Utah general contractor for commercial construction and tenant improvements across Northern Utah. We remove only what the new layout replaces, separate the work from any occupied part of the building, and schedule each phase around business hours when the space stays open.
What We Build
A Commercial Tenant Improvement, in Construction Order
Scope covers demolition of existing improvements; layout and partition framing; plumbing, mechanical, and electrical modifications; fire protection adjustments; insulation; drywall; ceilings; paint; flooring; millwork; fixtures; and the final inspection.
Demolition of Existing Improvements
Partitions, ceilings, flooring, and finishes that do not fit the new plan are removed. The work area is separated from any part of the building that stays in use.
Layout and Partition Framing
New partition walls, door openings, and soffits are framed to the approved plans. Blocking goes in for casework, shelving, and wall-mounted equipment.
Plumbing, Mechanical, and Electrical Modifications
The plumbing for restrooms and break rooms, ductwork and diffusers, and power and lighting circuits are extended or relocated to the new layout. Every rough-in is inspected before the partitions are closed.
Fire Protection Adjustments
Where the building has fire sprinklers or a fire alarm system, sprinkler heads and alarm devices are relocated to match the new walls and ceilings.
Insulation and Drywall
Sound insulation goes into partitions where the plan calls for it. The drywall is then hung, taped, and finished.
Ceilings
The suspended acoustical ceiling grid is hung at the heights the plans specify. Light fixtures, diffusers, and sprinkler heads are then set in the grid before the ceiling tiles are laid in.
Paint, Flooring, and Millwork
Paint, flooring, casework and millwork, doors and hardware, and plumbing fixtures complete the space ahead of the final inspection.
Final Inspection and Occupancy
Final inspections close the permit. Where a certificate of occupancy is required, the building official issues it before the space opens.
Codes and Requirements
Commercial Building Codes and Requirements in Utah
Commercial work in Utah follows different codes from residential work.
Building Code
The 2024 International Building Code
Utah Code 15A-2-103 adopts the 2024 International Building Code and the 2024 International Existing Building Code, together with the statewide amendments, as the standards for commercial construction and for work in existing buildings.
Design Professionals
Plans for the Permit
Under Utah Code 58-3a-304, a person without an architect's license may prepare plans for altering an existing building when the work affects 3,000 square feet or less and changes no structural elements, such as foundations, beams, columns, bearing walls, or trusses. Larger or structural work is designed by a licensed architect or engineer.
Accessibility
Accessible Design
Accessibility is governed by Chapter 11 of the International Building Code. Utah's amendments reference the ICC A117.1-2009 standard for accessible and usable buildings.
Occupancy
Certificate of Occupancy
Under Section 111.1 of the International Building Code, a building or any part of one is not occupied, and its occupancy is not changed, until the building official issues a certificate of occupancy for the permitted work.
Sources: Utah Code 15A-2-103, effective July 1, 2026; Utah Code 15A-3-113, amendments to IBC Chapters 32 through 35; Utah Code 58-3a-304, exemptions from architect licensure; 2024 International Building Code as adopted in Utah, Section 111.1.
Existing Buildings
Tenant Improvement Alteration Levels under Utah's Existing Building Code
The 2024 International Existing Building Code, adopted in Utah, lets the applicant choose the prescriptive, work area, or performance compliance method. Under the work area method, the code classifies the work by its type and its extent in the building. That classification sets the requirements the tenant improvement has to meet.
Work Area
The construction documents identify the work area, which the code defines as all reconfigured spaces, not the areas where only incidental work is done, under Sections 202 and 601.2. A work area over 50 percent of the building area makes the alteration Level 3, under Section 604.1.
Level 1 Alteration
Removing and replacing, or covering, existing materials, elements, equipment, or fixtures with new ones that serve the same purpose, such as new flooring or ceiling tiles, under Section 602.1.
Level 2 Alteration
Adding or eliminating a door or window, reconfiguring or extending a system, or installing additional equipment, where the work area is 50 percent of the building area or less, under Section 603.1. Moving or adding nonfixed and movable fixtures, cases, racks, counters, and partitions no taller than 5 feet 9 inches is not a Level 2 alteration, under the section's exception.
Level 3 Alteration
Any alteration where the work area exceeds 50 percent of the building area, with the Level 1 and Level 2 requirements also applying, under Sections 604.1 and 604.2.
Change of Occupancy
Section 202 defines a change of occupancy as a change in the occupancy classification, purpose, level of activity, or use of a building or space. It counts as one where the current building code requires a greater degree of safety, accessibility, structural strength, fire protection, means of egress, ventilation, or sanitation than the building now provides. A change of occupancy follows the provisions in Chapter 10 of the International Existing Building Code, under Section 605.
Sources: 2024 International Existing Building Code as adopted in Utah, Chapter 2, definitions; Chapter 3, Section 301.3; Chapter 6, classification of work.
Alteration Requirements
What Utah's Existing Building Code Requires of a Commercial Alteration
Under the work area method, every tenant improvement meets the Level 1 provisions, a Level 2 alteration adds requirements for its work area, and a change of occupancy brings its own plumbing rules.
No Less Safe
An existing building is not altered in a way that leaves it less safe than its existing condition, under Section 701.2. Where an alteration would reduce the current level of safety or sanitation, the altered portion meets the International Building Code, under the section's exception.
Materials and Methods
New work follows the material and installation requirements of the International Building, Energy Conservation, Mechanical, and Plumbing Codes, under Section 702.7.
New Construction Elements
In a Level 2 alteration, new construction elements, components, systems, and spaces comply with the International Building Code, under Section 801.4. Among the section's exceptions, added windows need not meet the building code's light and ventilation requirements, newly installed electrical equipment follows Section 806, and newly created habitable and occupiable spaces and corridors need a minimum ceiling height of 7 feet.
Structure
In a Level 2 alteration, an existing structural element whose gravity load rises more than 5 percent, snow drift included, is replaced or altered as needed to carry the loads the building code sets for new structures, with limited exceptions, under Section 805.2.
Means of Egress
Alterations maintain the level of means of egress protection the building already provides, and movable casework and partitions no taller than 5 feet 9 inches keep the egress path clear, under Sections 704.1 and 704.2.
Plumbing Fixtures
When a change of occupancy raises a story's occupant load by more than 20 percent, plumbing fixtures for that story are provided in the quantities the International Plumbing Code sets for the increased load, under Section 1009.1.
Food Service Spaces
A space converted to food handling has its existing waste lines above food and drink preparation and storage areas panned or otherwise protected, and no new drainage lines run over those areas, under Section 1009.2. Wherever the new use produces grease- or oil-laden waste, the space gets the interceptors the International Plumbing Code requires, under Section 1009.3.
Ventilation
Reconfigured spaces and spaces converted to occupiable use get natural or mechanical ventilation that meets the International Mechanical Code, under Section 807.1. An altered existing system supplies at least 5 cfm of outdoor air and 15 cfm of ventilation air per person, or the amount the ASHRAE 62.1 Indoor Air Quality Procedure sets, under Section 807.2.
Fire Protection
Alterations maintain the level of fire protection the building already provides, under Section 703.1.
Energy
Altered work meets the energy code as it applies to new construction without requiring the whole building to comply, under Sections 708.1 and 809.1.
Interior Finishes
New wall and ceiling finishes meet Chapter 8 of the International Building Code, with floor finishes to its Section 804 and trim to its Section 806, under Sections 702.1 through 702.3 of the existing building code.
Sources: 2024 International Existing Building Code as adopted in Utah, Chapter 7, Level 1 alterations; Chapter 8, Level 2 alterations; Chapter 10, change of occupancy.
Accessibility
Accessibility Requirements for a Utah Tenant Improvement
An altered commercial space meets the accessibility provisions of the building code. Utah's existing building code sets how far an alteration reaches beyond the space itself.
Altered Space
A facility that is altered complies with Chapter 11 of the International Building Code and ICC A117.1, unless compliance is technically infeasible, in which case access is provided to the maximum extent technically feasible, under Section 306.7.
Route to the Space
When an alteration affects an area of primary function, the route to that area is made accessible, along with the toilet facilities and drinking fountains that serve it and the route to them, under Section 306.7.1. Exceptions 2 through 5 to that section exclude four cases from the requirement. Two are alterations limited solely to windows, hardware, operating controls, electrical outlets, and signs, and alterations limited solely to mechanical systems, electrical systems, fire protection systems, and hazardous materials abatement. The others are alterations made primarily to increase accessibility and altered areas limited to Type B dwelling and sleeping units.
The 20 Percent Limit
The combined cost of that route, the toilet facilities, and the drinking fountains is not required to exceed 20 percent of the cost of the alterations affecting the area of primary function, under Exception 1 to Section 306.7.1.
No Reduction in Access
An alteration may not reduce the accessibility of a building below the requirements for new construction, under Section 306.2.1. Required accessible means of egress are maintained in an occupied building during construction unless approved temporary means of egress and accessible means of egress systems and facilities are provided, under Section 306.2.
Source: 2024 International Existing Building Code as adopted in Utah, Section 306.
How We Build
Our Remodeling and Construction Process
Every Allegiant Construction project moves through three phases, from the first measurement to the last punch list item. As your general contractor, we manage the permits, inspections, and schedule in each one.
Design and Preconstruction
We measure your space, produce permit-ready plans, and help you finalize every selection. We set the scope, the schedule, and the contractor's fee in writing and secure permits through the Authority Having Jurisdiction before demolition begins.
Construction
Demolition, framing, plumbing, mechanical, and electrical rough-in, and finishes proceed in sequence, with the work area sealed off and your questions answered the same day. Rough-in and framing pass their inspections before insulation and drywall cover them, and any change goes through a written change order before that work proceeds.
Completion and Closeout
We pass final inspection, walk the finished space together, create the punch list, and complete every remaining item. Your one-year warranty on work and materials begins at substantial completion, and warranty calls come directly to Allegiant Construction.
What It Can Become
Commercial Spaces We Build Out in Utah
Each of the four directions below starts from the existing shell and the needs of the incoming business.
Office
Office Suites
Private offices, conference rooms, and open work areas are laid out within an existing shell. Power and lighting are planned for each work area.
Retail
Retail and Showroom Space
Storefront interiors, display walls, consultation rooms, and back-of-house storage are built to the tenant's layout.
Change of Use
A Space Converted to a New Use
Converting a space from one use to another, such as retail to office, is reviewed against the code for the new occupancy before the space opens.
Occupied Buildings
Work in an Occupied Building
Demolition and other noisy work can be scheduled outside business hours.
Concept directions for planning, not past projects.
How We Price
How Much Does a Commercial Tenant Improvement Cost in Utah?
Most commercial tenant improvements are built on open-book, cost-plus terms. The actual cost of each trade is documented on every draw.
Existing Conditions
What remains from the previous tenant, and what has to be removed or corrected, sets the starting point of the budget.
Layout
The number of rooms, doors, and partitions sets the framing, drywall, and ceiling scope.
Accessibility
Restrooms, doors, and routes that must meet accessibility requirements can add scope in an older space.
Plumbing, Mechanical, and Electrical
Adding restrooms, relocating ductwork, or running new circuits brings more trade work and inspections.
Fire Protection
Moving sprinkler heads and alarm devices to a new layout adds work by the fire protection trades.
Finishes
Flooring, millwork, doors and hardware, and fixtures are priced from your selections.
Phasing
Work scheduled after hours to keep a business open is planned and priced during preconstruction.
The cost of a commercial tenant improvement in Utah depends on the existing conditions; the layout; accessibility upgrades; the plumbing, mechanical, and electrical changes; fire protection; finishes; and phasing. We provide a written, non-binding estimate after reviewing the space and the plans.
How Cost-Plus Pricing Works
Where We Build
Commercial Construction across Northern Utah
We build tenant improvements and commercial interiors in all eight counties. Each permit application goes to the building office of the city, town, county, or district where the property sits.
Commercial Construction in Salt Lake County
Emigration Canyon, Salt Lake City, Magna, South Salt Lake, Millcreek, West Valley City, Holladay, Taylorsville, Kearns, Murray, Midvale, Cottonwood Heights, Brighton, West Jordan, Alta, Sandy, White City, Copperton, South Jordan, Riverton, Draper, Herriman, and Bluffdale.
Salt Lake County Permits and CommunitiesCommercial Construction in Utah County
Alpine, Highland, Lehi, Cedar Hills, American Fork, Pleasant Grove, Saratoga Springs, Lindon, Cedar Fort, Eagle Mountain, Vineyard, Orem, Provo, Fairfield, Springville, Mapleton, Spanish Fork, Salem, Payson, Woodland Hills, Genola, Elk Ridge, Spring Lake, Santaquin, and Goshen.
Utah County Permits and CommunitiesCommercial Construction in Wasatch County
Hideout, Heber City, Interlaken, Midway, Center Creek, Charleston, Daniel, Independence, and Wallsburg.
Wasatch County Permits and CommunitiesCommercial Construction in Summit County
Henefer, Coalville, Wanship, Silver Summit, Summit Park, Oakley, Peoa, Snyderville, Park City, Kamas, and Francis.
Summit County Permits and CommunitiesCommercial Construction in Davis County
Clinton, Sunset, South Weber, West Point, Clearfield, Syracuse, Layton, Kaysville, Fruit Heights, Farmington, Centerville, West Bountiful, Woods Cross, Bountiful, and North Salt Lake.
Davis County Permits and CitiesCommercial Construction in Weber County
Pleasant View, North Ogden, Plain City, Farr West, Ogden Valley City, Harrisville, Marriott-Slaterville, Huntsville, Ogden, West Haven, Riverdale, South Ogden, Roy, Washington Terrace, Hooper, and Uintah.
Weber County Permits and CommunitiesCommercial Construction in Morgan County
Mountain Green, Peterson, Croydon, Morgan, and Porterville.
Morgan County Permits and CommunitiesCommercial Construction in Cache County
Lewiston, Cornish, Richmond, Clarkston, Trenton, Newton, Amalga, Smithfield, Hyde Park, North Logan, Logan, River Heights, Mendon, Providence, Millville, Nibley, Hyrum, Wellsville, and Paradise.
Cache County Permits and CommunitiesCommercial Construction by City and Town
- Commercial Construction in Newton
- Commercial Construction in North Logan
- Commercial Construction in Logan
- Commercial Construction in Mendon
- Commercial Construction in Pleasant View
- Commercial Construction in North Ogden
- Commercial Construction in Marriott-Slaterville
- Commercial Construction in Ogden
- Commercial Construction in West Haven
- Commercial Construction in South Ogden
- Commercial Construction in Roy
- Commercial Construction in Washington Terrace
- Commercial Construction in Clinton
- Commercial Construction in Sunset
- Commercial Construction in South Weber
- Commercial Construction in Clearfield
- Commercial Construction in Syracuse
- Commercial Construction in Layton
- Commercial Construction in Kaysville
- Commercial Construction in Farmington
- Commercial Construction in Centerville
- Commercial Construction in Coalville
- Commercial Construction in West Bountiful
- Commercial Construction in Bountiful
- Commercial Construction in North Salt Lake
- Commercial Construction in Salt Lake City
- Commercial Construction in Oakley
- Commercial Construction in South Salt Lake
- Commercial Construction in Millcreek
- Commercial Construction in West Valley City
- Commercial Construction in Holladay
- Commercial Construction in Park City
- Commercial Construction in Murray
- Commercial Construction in Hideout
- Commercial Construction in Midvale
- Commercial Construction in Cottonwood Heights
- Commercial Construction in West Jordan
- Commercial Construction in Sandy
- Commercial Construction in South Jordan
- Commercial Construction in Heber City
- Commercial Construction in Midway
- Commercial Construction in Riverton
- Commercial Construction in Draper
- Commercial Construction in Herriman
- Commercial Construction in Bluffdale
- Commercial Construction in Alpine
- Commercial Construction in Highland
- Commercial Construction in Lehi
- Commercial Construction in Cedar Hills
- Commercial Construction in American Fork
- Commercial Construction in Pleasant Grove
- Commercial Construction in Saratoga Springs
- Commercial Construction in Lindon
- Commercial Construction in Eagle Mountain
- Commercial Construction in Vineyard
- Commercial Construction in Orem
- Commercial Construction in Springville
- Commercial Construction in Mapleton
- Commercial Construction in Spanish Fork
- Commercial Construction in Payson
- Commercial Construction in Santaquin
What Business Owners Ask
Utah Commercial Construction Questions
What is a tenant improvement?
A tenant improvement is the construction, such as new partitions, restrooms, ceilings, lighting, and finishes, that fits an existing commercial space to the business that will occupy it, whether the tenant, the landlord, or both pay for the work.
Do you take on tenant improvement projects?
Yes. Tenant improvements, office and retail build-outs, and commercial interiors are part of our work across Northern Utah, from demolition of the previous improvements through the final inspection.
Do I need an architect for a commercial tenant improvement in Utah?
It depends on the size of the work and whether the structure changes. Under Utah Code 58-3a-304, plans for an alteration that affects 3,000 square feet or less and changes no structural elements can be drawn without an architect's license. Work beyond those limits is designed by a licensed architect or engineer. We confirm which applies during preconstruction.
Who obtains the building permit for a tenant improvement?
We review the plans, the design team's drawings, and any construction requirements in the lease. We then prepare the application, submit it to the issuing building office, schedule each inspection, and close the permit at final.
Which building code applies to a tenant improvement in Utah?
Utah adopts the 2024 International Building Code and the 2024 International Existing Building Code. Under the existing building code's work area method, work is classified as a Level 1, Level 2, or Level 3 alteration, or as a change of occupancy. That classification sets the requirements. The applicant may instead use the code's prescriptive or performance method.
Does a tenant improvement have to be made accessible?
The altered space does, unless compliance is technically infeasible, in which case access is provided to the maximum extent technically feasible. When the work affects an area of primary function, the route to it and the restrooms and drinking fountains that serve it are made accessible too. The cost of those route improvements is not required to exceed 20 percent of the cost of the alterations affecting that area. Among the other exceptions in Section 306.7.1, the route requirement does not apply to work limited solely to windows, hardware, operating controls, electrical outlets, and signs; or to work limited solely to mechanical systems, electrical systems, fire protection systems, and hazardous materials abatement.
Do I need more restrooms when I change the use of a space?
Only where the change raises the story's occupant load by more than 20 percent. In that case, the plumbing fixtures for the story are provided in the quantities the International Plumbing Code sets for the larger load. Otherwise, the new use meets the intent of that code.
Does a restaurant build-out need a grease interceptor in Utah?
Yes. It needs a grease interceptor or an automatic grease removal device to receive the drainage from fixtures and equipment with grease-laden waste in the food preparation area, under Section 1003.3.1 of the International Plumbing Code as adopted in Utah. When a space is converted to food service, Utah's existing building code also calls for the interceptors the plumbing code requires and for the existing waste lines above food preparation and storage areas to be panned or otherwise protected.
Does a tenant improvement have to meet the energy code?
The altered work meets the energy code's requirements for new construction. The rest of the building does not have to be brought up to them.
Does a change of use need a new certificate of occupancy?
When the new use counts as a change of occupancy, yes. A change of use is a change of occupancy where the building code holds the new use to a higher standard of safety, accessibility, structural strength, fire protection, means of egress, ventilation, or sanitation. Under Section 111.1 of the International Building Code, a change of occupancy is not made until the building official issues a certificate of occupancy.
How is commercial construction priced?
Most commercial projects are built on open-book, cost-plus terms, the same structure as our residential work. The contractor's fee is agreed in writing before the work starts.
How long does a tenant improvement take?
The schedule depends on the scope, the building office's plan review, and the lead time on materials and equipment. It is set in writing before construction begins.
Can the work be phased so my business stays open?
Yes. Phasing is planned during preconstruction. Demolition and other noisy work are scheduled around business hours.
What We Guarantee
Signature Guarantees
Our Signature Guarantees define a refined construction experience built on clarity, accountability, and disciplined execution from start to finish.
All four are written into every proposal we deliver.
Investment Certainty
The contractor's fee is fixed once the contract is signed and does not change through completion.
Schedule Certainty
Your project schedule is established upfront and actively managed through completion and closeout.
Same-Day Communication
Project-related messages receive a same-day response, keeping communication clear, timely, and accountable.
Progress Reports
Weekly reports, photos, and project updates are delivered directly to you throughout every phase of construction.
Related
Services and Areas Related to Commercial Construction in Utah
Related Services
Service Areas
Project Planning

How to Start
Request a Commercial Consultation
Send the project details below to request a consultation.
- Send the Details Scope, address, and the schedule you have in mind.
- Set a Time A reply to arrange a visit to the property.
- Walk the Project A walkthrough, then a written scope, schedule, and estimate.
- Phone
- 801-835-4457
- Hours
- Sunday through Saturday
7 AM to 6 PM - Based In
- West Jordan, Utah

