Do I need a permit to finish my basement in Lehi?

Yes. Lehi requires a building permit for basement finishes that include framing, electrical, plumbing, or mechanical work. Cosmetic work like painting does not require a permit.

Do I need egress windows in my finished basement in Lehi?

Yes, for any room used as a bedroom. Lehi follows the IRC requirement for egress windows with a minimum 5.7 sq ft opening, sill height no more than 44 inches above the floor, and a window well if below grade.

Basement Finish Permit in Lehi, Utah

Required for finishing or remodeling an unfinished basement in Lehi, including framing, electrical, plumbing, and mechanical work.

Verified 2026-06-27 · Source

When you need this permit

Framing walls in an unfinished basement
Adding a bedroom (requires egress window)
Adding a bathroom (requires plumbing permit)
Electrical wiring for new rooms
Any structural modifications

Required documents

Req
Floor Plan
Layout showing room sizes, egress windows, and door locations
Req
Electrical Plan
Circuit layout, panel capacity, smoke/CO detector locations
Req
Mechanical Plan
HVAC supply/return for new rooms, combustion air for furnace room
Opt
Plumbing Plan
Required if adding bathroom, wet bar, or utility sink

Fee schedule

Fee type	Amount	Notes
Building Permit	$200-$600 based on square footage and valuation	—
Plan Review	65% of building permit fee	—
Trade Sub-Permits	Electrical, plumbing, mechanical permits as applicable	—

Review timeline

~7–14 business days

Typical estimate — confirm current times with the Lehi building department

Inspection process

1
Framing
Wall framing, fire blocking, egress window wells and openings
2
MEP Rough-In
Electrical, plumbing, and HVAC rough-ins before walls closed
3
Insulation
Insulation on exterior walls, vapor barrier placement
4
Final
Drywall, fixtures, smoke/CO detectors, and all finishes complete

Tips

Every basement bedroom in Lehi requires an egress window — 5.7 sq ft minimum opening, sill no higher than 44 inches.
Window wells deeper than 44 inches require a permanently attached ladder or steps.
The furnace/water heater room needs combustion air — do not fully enclose it without an air supply.
Smoke detectors are required in every bedroom, outside sleeping areas, and on every level.

Frequently asked questions

Do I need a permit to finish my basement in Lehi?: Yes. Lehi requires a building permit for basement finishes that include framing, electrical, plumbing, or mechanical work. Cosmetic work like painting does not require a permit.
Do I need egress windows in my finished basement in Lehi?: Yes, for any room used as a bedroom. Lehi follows the IRC requirement for egress windows with a minimum 5.7 sq ft opening, sill height no more than 44 inches above the floor, and a window well if below grade.

Sources & verification

Key facts verified against official sources. Last reviewed 2026-06-27.

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 Lehi building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.

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