Phase 1: Pre-Construction Planning
Assessment & Testing

[ ] Moisture test — Tape plastic sheeting to the floor and walls for 48 hours. Any moisture underneath means you have issues to address first
[ ] Radon test — Buy a short-term test kit ($15) or hire a professional ($150). Parts of Utah, especially along the Wasatch Front, have elevated levels
[ ] Measure and document — Total square footage, ceiling height at multiple points, location of existing plumbing/HVAC/electrical, support columns, and obstructions
[ ] Check existing rough-ins — Many Utah homes have pre-plumbed drains and supply lines. Find them before designing your layout
[ ] Inspect the foundation — Look for cracks, efflorescence (white mineral deposits), and water staining. Address any structural issues before finishing

Design & Planning

[ ] Create a floor plan — Room layout including all rooms, hallways, doors, and storage. Consider traffic flow and how spaces connect
[ ] Plan electrical layout — Outlet locations, switch locations, lighting plan, dedicated circuits for high-draw items (heaters, mini kitchen appliances)
[ ] Plan plumbing layout — Bathroom locations near existing rough-ins save thousands. Wet bars and kitchenettes need supply and drain lines
[ ] Plan HVAC extensions — Where will supply and return vents go? Is the existing furnace sized for the additional space?
[ ] Select finish level and materials — Flooring, paint colors, fixtures, lighting. Having these decided before construction starts prevents expensive delays
[ ] Get 2-3 contractor quotes — If hiring out. Compare scope of work, not just price. Ask for references from Utah projects
[ ] Set a realistic budget — Use our cost calculator for a starting estimate, then add 10-15% contingency

Permits & Approvals

[ ] Check local requirements — Contact your city's building department. All Utah cities require permits for basement finishing
[ ] Submit permit application — Include floor plan, electrical plan, and plumbing plan. Budget 1-3 weeks for approval
[ ] HOA approval — If applicable, submit plans to your HOA. Some have restrictions on exterior changes (egress windows)
[ ] Schedule inspections — Know which inspections are required and when. Typically: framing, electrical rough-in, plumbing rough-in, insulation, and final

Phase 2: Pre-Drywall Construction
Do these in order. Each step depends on the previous one.
Waterproofing & Foundation

[ ] Repair foundation cracks — Epoxy injection or hydraulic cement, depending on crack type
[ ] Install moisture barrier — On exterior walls if not already present. Dimple board or sealed poly sheeting
[ ] Install interior drain system — If moisture testing revealed issues. French drain along the footing perimeter connecting to a sump pump
[ ] Address radon — If testing showed levels above 4 pCi/L, install a radon mitigation system (sub-slab depressurization)

Framing

[ ] Lay out walls — Snap chalk lines on the floor marking all wall locations
[ ] Frame exterior walls — Pressure-treated bottom plates on concrete. Leave gap from foundation wall for moisture management
[ ] Frame interior walls — Standard lumber for walls not touching concrete
[ ] Frame soffits and bulkheads — Box in ductwork, pipes, and beams that can't be moved
[ ] Install door frames and headers — Size headers appropriately for load-bearing vs. partition walls
[ ] Build closets — Bedroom closets must meet minimum depth requirements
[ ] Frame bathroom walls — Use moisture-resistant bottom plates in wet areas

Electrical Rough-In

[ ] Run wire for all circuits — 15-amp for lighting, 20-amp for outlets, dedicated circuits for appliances
[ ] Install outlet boxes — Per code spacing (every 12 feet along walls, within 6 feet of doorways)
[ ] Install switch boxes — At every room entrance, at top and bottom of stairs
[ ] Run low-voltage wiring — Ethernet, coax for TV, speaker wire, security system wire
[ ] Install recessed light housings — Before insulation goes in
[ ] Install bathroom fan housing — Vented to exterior, not just into the attic
[ ] Wire smoke and CO detectors — Required in every bedroom, outside sleeping areas, and near furnace

Plumbing Rough-In

[ ] Run supply lines — Hot and cold to each fixture location
[ ] Install drain lines — Connect to existing sewer lines. Proper slope is critical
[ ] Set toilet flange — At correct height for your finished floor level
[ ] Install shower/tub drain — Before the concrete patch if breaking the slab
[ ] Pressure test — All supply lines must hold pressure before being closed in

HVAC

[ ] Extend ductwork — Supply and return runs to each room
[ ] Install dampers — To balance airflow between basement and upper floors
[ ] Verify capacity — HVAC system must handle the additional square footage. May need a larger blower motor or supplemental unit
[ ] Install bathroom exhaust fan — Duct to exterior. Minimum 50 CFM for small baths, 1 CFM per sqft for larger

Inspection Checkpoint

[ ] Schedule and pass rough-in inspection — Framing, electrical, plumbing, and mechanical all reviewed before closing walls. This is where inspectors catch issues. Fix anything flagged before proceeding

Phase 3: Insulation & Drywall
Insulation

[ ] Insulate exterior walls — Utah energy code requires specific R-values. Rigid foam, fiberglass batts, or spray foam depending on wall assembly
[ ] Insulate rim joist/band joist — Often missed but a major source of heat loss. Spray foam or cut-and-cobble rigid foam
[ ] Sound insulation — Fiberglass batts in the ceiling between basement and main floor if noise transfer is a concern. Required for home theaters
[ ] Insulate plumbing lines — Prevent condensation on cold water pipes, which causes dripping onto new drywall

Drywall

[ ] Hang drywall — 1/2" standard for most walls and ceilings. Moisture-resistant (green board or purple board) in bathrooms
[ ] Tape and mud joints — Multiple coats with sanding between. This is where quality shows
[ ] Apply texture — Orange peel, knockdown, or smooth. Match the upstairs texture for consistency
[ ] Prime walls — PVA primer on new drywall before paint

Inspection Checkpoint

[ ] Schedule and pass insulation inspection — Required before drywall in most Utah cities

Phase 4: Finish Work
Flooring

[ ] Install flooring — LVP, engineered hardwood, tile, or carpet. Choose appropriate materials for below-grade application
[ ] Install transitions — Between rooms with different flooring types
[ ] Install baseboards — After flooring is complete

Paint

[ ] Paint walls — Two coats of finish paint. Use quality basement-rated paint with mildew resistance
[ ] Paint ceiling — Flat white for maximum light reflection
[ ] Paint trim — Semi-gloss for durability and easy cleaning

Fixtures & Trim

[ ] Install interior doors — Pre-hung doors are easiest. Match style to upstairs doors
[ ] Install door hardware — Knobs, hinges, stops
[ ] Install trim — Window casing, crown molding (if applicable), chair rail
[ ] Install electrical devices — Outlets, switches, and cover plates
[ ] Install light fixtures — Recessed lights, pendants, sconces
[ ] Install bathroom fixtures — Toilet, vanity, faucets, mirror, shower fixtures, towel bars
[ ] Install kitchen/bar fixtures — Sink, faucet, cabinets, countertop, appliances

Egress Windows

[ ] Cut foundation opening — Professional concrete cutting required
[ ] Install window well — Corrugated steel, stone, or prefabricated well
[ ] Install window — Sized to meet egress code (5.7 sqft minimum opening)
[ ] Install window well cover — Keeps out debris and rain while allowing emergency exit
[ ] Grade around well — Ensure water drains away from the well, not into it

Phase 5: Final Steps

[ ] Final cleaning — Construction dust gets everywhere. Professional post-construction cleaning is worth it
[ ] Touch-up paint — Inevitable scuffs and marks from installation work
[ ] Final inspection — Schedule with your city. Inspector verifies all work meets code
[ ] Certificate of occupancy — Some cities require this, especially for ADUs or rental units
[ ] HVAC balancing — Adjust dampers so basement temperature is comfortable without making upstairs too cold or hot
[ ] Test everything — Every outlet, every light, every faucet, every drain. Run the shower for 10 minutes and check for leaks
[ ] Document warranties — Collect warranty info for all materials and workmanship

Timeline Expectations

Phase
Duration

Planning & permits
2-4 weeks

Framing
3-5 days

Electrical/plumbing rough-in
3-5 days

Inspection + insulation
1-2 weeks

Drywall (hang, tape, texture)
1-2 weeks

Finish work
2-4 weeks

Total
6-12 weeks

Ready to Start?

Question

Phase 1: Pre-Construction Planning
Assessment & Testing

[ ] Moisture test — Tape plastic sheeting to the floor and walls for 48 hours. Any moisture underneath means you have issues to address first
[ ] Radon test — Buy a short-term test kit ($15) or hire a professional ($150). Parts of Utah, especially along the Wasatch Front, have elevated levels
[ ] Measure and document — Total square footage, ceiling height at multiple points, location of existing plumbing/HVAC/electrical, support columns, and obstructions
[ ] Check existing rough-ins — Many Utah homes have pre-plumbed drains and supply lines. Find them before designing your layout
[ ] Inspect the foundation — Look for cracks, efflorescence (white mineral deposits), and water staining. Address any structural issues before finishing

Design & Planning

[ ] Create a floor plan — Room layout including all rooms, hallways, doors, and storage. Consider traffic flow and how spaces connect
[ ] Plan electrical layout — Outlet locations, switch locations, lighting plan, dedicated circuits for high-draw items (heaters, mini kitchen appliances)
[ ] Plan plumbing layout — Bathroom locations near existing rough-ins save thousands. Wet bars and kitchenettes need supply and drain lines
[ ] Plan HVAC extensions — Where will supply and return vents go? Is the existing furnace sized for the additional space?
[ ] Select finish level and materials — Flooring, paint colors, fixtures, lighting. Having these decided before construction starts prevents expensive delays
[ ] Get 2-3 contractor quotes — If hiring out. Compare scope of work, not just price. Ask for references from Utah projects
[ ] Set a realistic budget — Use our cost calculator for a starting estimate, then add 10-15% contingency

Permits & Approvals

[ ] Check local requirements — Contact your city's building department. All Utah cities require permits for basement finishing
[ ] Submit permit application — Include floor plan, electrical plan, and plumbing plan. Budget 1-3 weeks for approval
[ ] HOA approval — If applicable, submit plans to your HOA. Some have restrictions on exterior changes (egress windows)
[ ] Schedule inspections — Know which inspections are required and when. Typically: framing, electrical rough-in, plumbing rough-in, insulation, and final

Phase 2: Pre-Drywall Construction
Do these in order. Each step depends on the previous one.
Waterproofing & Foundation

[ ] Repair foundation cracks — Epoxy injection or hydraulic cement, depending on crack type
[ ] Install moisture barrier — On exterior walls if not already present. Dimple board or sealed poly sheeting
[ ] Install interior drain system — If moisture testing revealed issues. French drain along the footing perimeter connecting to a sump pump
[ ] Address radon — If testing showed levels above 4 pCi/L, install a radon mitigation system (sub-slab depressurization)

Framing

[ ] Lay out walls — Snap chalk lines on the floor marking all wall locations
[ ] Frame exterior walls — Pressure-treated bottom plates on concrete. Leave gap from foundation wall for moisture management
[ ] Frame interior walls — Standard lumber for walls not touching concrete
[ ] Frame soffits and bulkheads — Box in ductwork, pipes, and beams that can't be moved
[ ] Install door frames and headers — Size headers appropriately for load-bearing vs. partition walls
[ ] Build closets — Bedroom closets must meet minimum depth requirements
[ ] Frame bathroom walls — Use moisture-resistant bottom plates in wet areas

Electrical Rough-In

[ ] Run wire for all circuits — 15-amp for lighting, 20-amp for outlets, dedicated circuits for appliances
[ ] Install outlet boxes — Per code spacing (every 12 feet along walls, within 6 feet of doorways)
[ ] Install switch boxes — At every room entrance, at top and bottom of stairs
[ ] Run low-voltage wiring — Ethernet, coax for TV, speaker wire, security system wire
[ ] Install recessed light housings — Before insulation goes in
[ ] Install bathroom fan housing — Vented to exterior, not just into the attic
[ ] Wire smoke and CO detectors — Required in every bedroom, outside sleeping areas, and near furnace

Plumbing Rough-In

[ ] Run supply lines — Hot and cold to each fixture location
[ ] Install drain lines — Connect to existing sewer lines. Proper slope is critical
[ ] Set toilet flange — At correct height for your finished floor level
[ ] Install shower/tub drain — Before the concrete patch if breaking the slab
[ ] Pressure test — All supply lines must hold pressure before being closed in

HVAC

[ ] Extend ductwork — Supply and return runs to each room
[ ] Install dampers — To balance airflow between basement and upper floors
[ ] Verify capacity — HVAC system must handle the additional square footage. May need a larger blower motor or supplemental unit
[ ] Install bathroom exhaust fan — Duct to exterior. Minimum 50 CFM for small baths, 1 CFM per sqft for larger

Inspection Checkpoint

[ ] Schedule and pass rough-in inspection — Framing, electrical, plumbing, and mechanical all reviewed before closing walls. This is where inspectors catch issues. Fix anything flagged before proceeding

Phase 3: Insulation & Drywall
Insulation

[ ] Insulate exterior walls — Utah energy code requires specific R-values. Rigid foam, fiberglass batts, or spray foam depending on wall assembly
[ ] Insulate rim joist/band joist — Often missed but a major source of heat loss. Spray foam or cut-and-cobble rigid foam
[ ] Sound insulation — Fiberglass batts in the ceiling between basement and main floor if noise transfer is a concern. Required for home theaters
[ ] Insulate plumbing lines — Prevent condensation on cold water pipes, which causes dripping onto new drywall

Drywall

[ ] Hang drywall — 1/2" standard for most walls and ceilings. Moisture-resistant (green board or purple board) in bathrooms
[ ] Tape and mud joints — Multiple coats with sanding between. This is where quality shows
[ ] Apply texture — Orange peel, knockdown, or smooth. Match the upstairs texture for consistency
[ ] Prime walls — PVA primer on new drywall before paint

Inspection Checkpoint

[ ] Schedule and pass insulation inspection — Required before drywall in most Utah cities

Phase 4: Finish Work
Flooring

[ ] Install flooring — LVP, engineered hardwood, tile, or carpet. Choose appropriate materials for below-grade application
[ ] Install transitions — Between rooms with different flooring types
[ ] Install baseboards — After flooring is complete

Paint

[ ] Paint walls — Two coats of finish paint. Use quality basement-rated paint with mildew resistance
[ ] Paint ceiling — Flat white for maximum light reflection
[ ] Paint trim — Semi-gloss for durability and easy cleaning

Fixtures & Trim

[ ] Install interior doors — Pre-hung doors are easiest. Match style to upstairs doors
[ ] Install door hardware — Knobs, hinges, stops
[ ] Install trim — Window casing, crown molding (if applicable), chair rail
[ ] Install electrical devices — Outlets, switches, and cover plates
[ ] Install light fixtures — Recessed lights, pendants, sconces
[ ] Install bathroom fixtures — Toilet, vanity, faucets, mirror, shower fixtures, towel bars
[ ] Install kitchen/bar fixtures — Sink, faucet, cabinets, countertop, appliances

Egress Windows

[ ] Cut foundation opening — Professional concrete cutting required
[ ] Install window well — Corrugated steel, stone, or prefabricated well
[ ] Install window — Sized to meet egress code (5.7 sqft minimum opening)
[ ] Install window well cover — Keeps out debris and rain while allowing emergency exit
[ ] Grade around well — Ensure water drains away from the well, not into it

Phase 5: Final Steps

[ ] Final cleaning — Construction dust gets everywhere. Professional post-construction cleaning is worth it
[ ] Touch-up paint — Inevitable scuffs and marks from installation work
[ ] Final inspection — Schedule with your city. Inspector verifies all work meets code
[ ] Certificate of occupancy — Some cities require this, especially for ADUs or rental units
[ ] HVAC balancing — Adjust dampers so basement temperature is comfortable without making upstairs too cold or hot
[ ] Test everything — Every outlet, every light, every faucet, every drain. Run the shower for 10 minutes and check for leaks
[ ] Document warranties — Collect warranty info for all materials and workmanship

Timeline Expectations

Phase
Duration

Planning & permits
2-4 weeks

Framing
3-5 days

Electrical/plumbing rough-in
3-5 days

Inspection + insulation
1-2 weeks

Drywall (hang, tape, texture)
1-2 weeks

Finish work
2-4 weeks

Total
6-12 weeks

Ready to Start?

Accepted Answer

Print this checklist and use it to track your project. Whether you're hiring a professional basement finishing contractor or managing subs yourself, knowing the process prevents surprises. Get a free quote to start your basement project, or call 801-515-3473 to discuss your plans.

Basement Finishing Checklist: Your Complete Step-by-Step Guide