Whole-Home Remodel Permits in Boise
A comprehensive guide to building permits, code requirements, trade permits, inspections, and regulatory compliance for whole-home remodeling projects in Boise, Ada County, and the Treasure Valley.
A whole-home remodel is the most permit-intensive residential construction project you can undertake in Boise. Because the work spans every major building system — structural, electrical, plumbing, mechanical, and energy — multiple permits are almost always required. Understanding what triggers a permit (and what does not) helps you plan realistic timelines and budgets from the start.
Requires a Permit
Structural changes (wall removal, headers, beams)
Removing or modifying load-bearing walls, installing structural beams, adding or enlarging openings, and any work that alters the building's load path. Requires structural engineering and a building permit.
Electrical panel upgrades and new circuits
Adding circuits, upgrading the main panel (extremely common in pre-1990 Boise homes), relocating outlets, adding dedicated appliance circuits, and any wiring changes. Requires a separate electrical permit.
Plumbing fixture additions or relocations
Adding bathrooms, moving sinks, relocating water heaters, extending supply and drain lines, modifying waste and vent piping. Requires a plumbing permit.
HVAC system modifications
Replacing furnaces or air conditioners, adding ductwork runs, installing mini-split systems, modifying existing duct routing, and changing system capacity. Requires a mechanical permit.
Window and door modifications
Adding, removing, enlarging, or relocating windows and exterior doors. Triggers building permit requirements and may require energy code compliance demonstration.
Roof structural changes
Removing or adding roof structure, changing roof pitch, adding dormers, skylights, or modifying roof framing for vaulted ceilings. Requires structural engineering and a building permit.
Foundation modifications
Underpinning, adding footings for new posts or beams, slab modifications, and crawl space structural changes. Requires structural engineering and a building permit.
Gas line work
Installing, extending, or relocating gas supply lines for furnaces, water heaters, fireplaces, ranges, or dryers. Requires a gas/plumbing permit and pressure testing.
No Permit Needed
Interior painting and wall finishes
Painting walls, ceilings, trim, and cabinets. Applying wallpaper, decorative plaster, or accent wall treatments.
Flooring replacement (same subfloor)
Replacing carpet, hardwood, tile, or LVP when the subfloor remains unchanged and no structural modifications are needed.
Cabinet refacing or replacement (same layout)
Replacing cabinet doors, drawer fronts, or installing new cabinets in the same locations without modifying plumbing, electrical, or structural elements.
Countertop replacement
Swapping countertop materials when sink and plumbing connections remain in the same location.
Fixture-for-fixture swaps (same location)
Replacing a toilet with a toilet, a faucet with a faucet, or a light fixture with a light fixture at the same connection point. No circuit or plumbing changes.
Trim and molding installation
Installing baseboards, crown molding, door casing, and decorative trim. Purely cosmetic finish work.
Hardware and accessory replacement
Changing door handles, cabinet hardware, towel bars, outlet covers, switch plates, and similar accessories.
Ada County vs. Canyon County: Both jurisdictions adopt the same base codes (IRC 2018 with Idaho amendments), but they operate separate building departments with different fee schedules, online portals, and review timelines. Ada County (Boise, Meridian, Eagle, Garden City, Star, Kuna) uses the MyBuildingPermit.com online system. Canyon County (Nampa, Caldwell) has its own application process with generally shorter review periods. Iron Crest Remodel is experienced in both jurisdictions and handles all permit logistics regardless of your property's location.
The permit process for a whole-home remodel is more involved than a single-room renovation because multiple trades, engineering reviews, and plan sets must be coordinated. Here is the step-by-step sequence you can expect when permitting a comprehensive remodel in Boise or Ada County.
Design & Documentation
Before any permit application is submitted, complete construction documents must be prepared. For a whole-home remodel, this typically includes a site plan showing the property and any exterior changes, existing and proposed floor plans for every level of the home, structural calculations and engineering drawings (if structural work is involved), electrical plans showing panel location and circuit layouts, plumbing plans showing fixture locations and pipe routing, and mechanical plans showing HVAC duct layout and equipment placement.
Required documents: Site plan, floor plans (existing and proposed), structural calculations with PE stamp (if applicable), electrical layout, plumbing layout, mechanical layout, energy code compliance documentation (IECC 2018), and contractor license and insurance verification.
Application Submission
Applications are submitted to the City of Boise Development Services or Ada County Development Services, depending on your property's jurisdiction. Ada County offers online submission through the MyBuildingPermit.com portal, which allows digital plan uploads and fee payment. For whole-home remodels, multiple permit applications are often submitted simultaneously — a general building permit plus separate trade permits for electrical, plumbing, and mechanical work.
Fee calculation: Building permit fees are based on project valuation using the ICC Building Valuation Data table. A plan review fee (typically 65% of the building permit fee) is charged separately. For a whole-home remodel valued at $100,000 to $300,000, expect building permit fees of $800 to $2,000 before plan review surcharges.
Plan Review
A plan reviewer (or multiple reviewers for different disciplines) examines the submitted documents for compliance with the International Residential Code (IRC) as adopted by Idaho. For whole-home remodels, this review is comprehensive: structural adequacy, electrical load calculations, plumbing fixture counts and venting, mechanical system sizing, fire and life safety, and energy code compliance are all evaluated.
Timeline: Standard plan review for whole-home remodels in Boise takes 4 to 8 weeks. Projects with extensive structural work or unusual conditions may take longer. If the reviewer requests revisions (common on complex projects), each revision cycle adds 1 to 3 weeks. Submitting complete, well-organized plans with all required calculations on the first attempt is critical to avoiding delays.
Permit Issuance
Once all plans are approved, the permits are issued and construction can begin. The permit card must be posted at the job site in a location visible from the street. For whole-home remodels, you will typically have multiple permit cards posted — one for the building permit and separate cards for each trade permit.
Validity: Permits in Boise are valid for 180 days from issuance. If work does not begin within 180 days, the permit expires. For whole-home remodels that take 3 to 6 months or longer, active construction keeps the permit valid. Extensions may be requested if unexpected delays occur. Expired permits require a new application and fee payment.
Inspections & Final Approval
A whole-home remodel requires the most inspections of any residential project — typically 8 to 12 individual inspections across all trades. Inspections are scheduled through the city or county portal with 24-hour notice. Each inspection must pass before work can proceed to the next phase. After all final inspections pass, the permits are closed and a certificate of completion is issued. This document is your legal proof that all work was performed to code — essential for insurance coverage and future resale.
Idaho adopts the 2018 International Residential Code (IRC) with state-specific amendments. For whole-home remodels, understanding the key code sections that affect your project scope helps you plan more effectively and avoid costly surprises during plan review or inspections.
Egress Windows
Every sleeping room (bedroom) must have at least one emergency escape and rescue opening. The IRC requires a minimum net clear opening of 5.7 square feet (5.0 square feet at grade level), with a minimum height of 24 inches and minimum width of 20 inches. The sill height cannot exceed 44 inches from the finished floor.
Impact on remodels: If you are converting a room to a bedroom or remodeling a bedroom with non-compliant windows, the windows must be upgraded to meet current egress requirements. This is one of the most common code triggers in Boise whole-home remodels, especially in older homes built before modern egress standards.
Ceiling Heights
Habitable rooms must have a minimum ceiling height of 7 feet. Bathrooms, hallways, and laundry rooms require a minimum of 6 feet 8 inches. Rooms with sloped ceilings must have at least 50% of the floor area at the 7-foot minimum, with no portion of the required floor area below 5 feet.
Impact on remodels: When vaulting ceilings, adding beams, or converting attic space, ceiling height compliance must be verified. New beam installations that reduce ceiling height below the minimum can force design changes. Boise homes with low-profile trusses or shallow crawl spaces may have limited options for lowering floors or raising ceilings.
Stairway Requirements
Stairways must have a minimum width of 36 inches, a maximum riser height of 7-3/4 inches, a minimum tread depth of 10 inches, and headroom of at least 6 feet 8 inches. Handrails are required on at least one side, graspable between 1-1/4 and 2 inches, and mounted 34 to 38 inches above the stair nosing.
Impact on remodels: If your remodel involves stairway modifications, additions, or if existing stairs are being relocated, full compliance with current stairway codes is required. Many pre-1980 Boise homes have stairways that do not meet current standards. A whole-home remodel that touches the stairway triggers a full code upgrade for that element.
Smoke & CO Detectors
When a building permit is issued for alterations, repairs, or additions, smoke alarms must be installed in every sleeping room, outside each sleeping area, and on every level of the home including the basement. Carbon monoxide (CO) detectors are required outside each sleeping area and on every level when fuel-burning appliances or an attached garage are present.
Impact on remodels: A whole-home remodel permit triggers a full upgrade of smoke and CO detection throughout the home. Detectors must be hardwired with battery backup and interconnected so all alarms sound simultaneously. This is a non-negotiable requirement that the final building inspector will verify before closing the permit.
How code changes affect remodel scope: When you pull a building permit, the work described in that permit must comply with current code — not the code in effect when the home was originally built. This means a whole-home remodel on a 1970s Boise home may require significant upgrades to electrical, insulation, egress, and life safety systems that were not part of the original construction. Iron Crest identifies all code-triggered upgrades during the design phase so there are no surprises during construction.
Structural work is the most heavily regulated aspect of a whole-home remodel. Any change to the building's load-bearing system — walls, beams, posts, roof framing, or foundation — requires engineering review and a building permit with structural plan review.
Common Structural Work in Whole-Home Remodels
Load-Bearing Wall Removal
The most common structural modification in Boise whole-home remodels. Removing walls between kitchen, dining, and living areas to create open floor plans requires engineered beams (LVL, glulam, or steel), properly sized posts, and verified foundation bearing capacity at each support point. An Idaho-licensed PE must stamp the drawings.
Header Sizing for New Openings
Adding or enlarging windows, doors, or pass-throughs in load-bearing walls requires properly sized headers. Header sizing depends on the span, the load above (roof, floor, or both), and the species and grade of lumber. Openings over 6 feet typically require engineered headers (LVL or steel) rather than standard dimensional lumber.
Roof Structural Changes
Vaulting ceilings, adding dormers, installing skylights that require rafter cutting, or changing roof pitch all modify the structural roof system. Each of these changes requires engineering analysis to ensure the modified structure can carry wind, snow, and dead loads per Idaho's design requirements (ground snow load in Boise is 25 PSF).
Foundation Modifications
Adding new posts and beams creates new point loads that must be transferred to the foundation. In many Boise homes, this means adding new concrete footings in the crawl space or reinforcing existing foundation walls. Homes on slab foundations may require core drilling and new piers. All foundation work requires engineering and a footing inspection before concrete is poured.
When a Licensed PE Stamp Is Required
The City of Boise and Ada County require stamped structural engineering drawings from an Idaho-licensed Professional Engineer (PE) for the following work:
- Any load-bearing wall removal or modification
- Beam spans exceeding prescriptive code tables (typically over 6 feet)
- Roof framing modifications (rafter removal, dormer additions, vaulted ceilings)
- Foundation modifications or new footing designs
- Floor system modifications (joist removal, opening for stairs, cantilevers)
- Steel beam or column installations
- Any condition the plan reviewer deems beyond prescriptive code tables
Structural Engineering Costs
- Single wall removal (simple span): $500 - $1,500
- Multiple wall removals or complex load paths: $1,500 - $3,000
- Roof structural modifications: $1,000 - $3,000
- Foundation engineering: $800 - $2,500
- Comprehensive whole-home structural package: $2,000 - $5,000+
Iron Crest works with several Idaho-licensed structural engineers and coordinates the engineering process as part of your project.
Electrical work is involved in virtually every whole-home remodel. Boise homes built before 1990 frequently need panel upgrades, and modern code requirements for GFCI and AFCI protection mean that new circuits must meet significantly higher safety standards than the original wiring.
Panel Upgrades
Many pre-1990 Boise homes have 100-amp or even 60-amp electrical panels that cannot support a modern remodel. Whole-home remodels frequently require a panel upgrade to 200 amps. If the home has a Federal Pacific or Zinsco panel (common in 1970s and 1980s Boise homes), replacement is strongly recommended regardless of capacity.
- 200-amp panel upgrade: $2,000 - $4,000 installed
- Idaho Power coordination may be required for service upgrade
- Separate electrical permit required
GFCI & AFCI Protection
Current code (NEC as adopted by Idaho) requires GFCI protection for receptacles in kitchens, bathrooms, laundry rooms, garages, unfinished basements, crawl spaces, and all outdoor locations. AFCI protection is required for all 15-amp and 20-amp branch circuits in bedrooms, living rooms, dining rooms, hallways, closets, and similar habitable spaces.
- New circuits must comply with current GFCI/AFCI requirements
- Combination AFCI/GFCI breakers simplify compliance
- Existing circuits being modified may trigger upgrade requirements
Inspection Process
Electrical work requires two inspections: a rough-in inspection (after wiring is installed but before walls are closed) and a final inspection (after all devices, fixtures, and covers are installed). The Ada County electrical inspector verifies wire gauge, box fill, circuit breaker sizing, grounding, and code compliance at each stage.
- Rough inspection: all wiring visible before drywall
- Final inspection: all devices connected and operational
- 24-hour notice required for inspection scheduling
Whole-home remodels typically involve significant plumbing and mechanical (HVAC) work. Each trade requires its own permit and separate inspections. Boise's specific mechanical code requirements and the region's climate create unique considerations for these systems.
Plumbing Permits
A plumbing permit is required whenever fixtures are added, relocated, or when supply, drain, or vent piping is modified. In a whole-home remodel, plumbing work commonly includes bathroom additions or relocations, kitchen sink and dishwasher connections, water heater replacement or relocation, laundry hookup changes, and gas line modifications.
Fixture additions and relocations
Adding a bathroom, moving a kitchen sink, or relocating a laundry room requires new supply and drain connections. Pipe sizing, slope (1/4 inch per foot minimum for drains), and vent configuration must comply with the International Plumbing Code.
Water heater replacement
Replacing a water heater requires a plumbing permit in Boise, even if the new unit is in the same location. If upgrading from a tank to a tankless unit, gas line sizing, venting, and condensate drainage must be addressed.
Gas line modifications
Any work on gas supply lines (extending to a new range, relocating a dryer hookup, adding a gas fireplace) requires a gas permit and a pressure test inspection before the lines are concealed. Intermountain Gas may need to verify meter capacity.
Mechanical (HVAC) Permits
A mechanical permit is required for furnace replacement, air conditioner installation, ductwork modifications, exhaust fan installations, and any changes to the heating and cooling system. Boise's climate (cold winters, hot summers) makes HVAC system performance critical, and the building department pays close attention to system sizing and duct design.
HVAC system changes
Replacing a furnace or air conditioner, adding a heat pump, installing a mini-split system, or converting from one fuel type to another all require mechanical permits. New systems must be sized per Manual J load calculations.
Ductwork modifications
Adding new duct runs to serve remodeled spaces, rerouting ducts around structural changes, or upsizing ducts to match new equipment capacity requires a mechanical permit and inspection.
Exhaust and ventilation
Range hood venting to the exterior, bathroom exhaust fans with new ductwork, and whole-house ventilation systems (required by current energy code) all require mechanical permits. Hoods over 400 CFM require makeup air provisions.
Plumbing permit fees: $75 - $300 depending on the number of fixtures and scope of piping work. A whole-home remodel with multiple bathroom renovations and kitchen plumbing typically falls at the higher end.
Mechanical permit fees: $75 - $300 depending on the number of systems and complexity. Furnace replacement plus ductwork modifications in a whole-home remodel typically costs $150 - $250 in permit fees.
Idaho adopts the 2018 International Energy Conservation Code (IECC) with state amendments. Whole-home remodels trigger significant energy code requirements, particularly when walls are opened, windows are replaced, or insulation cavities are exposed. Boise is in Climate Zone 5, which has some of the most stringent insulation and air sealing requirements in the IECC.
Insulation Requirements
When exterior walls are opened during a remodel, the insulation in those wall cavities must be upgraded to meet current code. For Climate Zone 5 (Boise), the IECC 2018 requires:
- Exterior walls: R-20 cavity or R-13 cavity + R-5 continuous insulation
- Ceiling/attic: R-49 (or R-38 in specific conditions)
- Floor over unconditioned space: R-30
- Basement walls: R-10 continuous or R-13 cavity
- Slab perimeter: R-10 for 2 feet
Window U-Factor Requirements
Any new or replacement windows installed during a whole-home remodel must meet current energy code performance ratings. For Climate Zone 5:
- Maximum U-factor: 0.30 (lower is better)
- Maximum SHGC (Solar Heat Gain Coefficient): 0.40
- All windows must carry an NFRC label verifying rated performance
- Dual-pane low-E windows meet these requirements; single-pane windows do not
- Existing windows not being replaced are generally exempt
Air Sealing & Blower Door Testing
The IECC 2018 requires air leakage testing for new construction. For remodels, the requirement applies when the scope triggers substantial compliance (generally when more than 50% of the building envelope is being altered). The maximum allowable air leakage rate for Climate Zone 5 is 3 ACH50 (air changes per hour at 50 Pascals of pressure).
Practical impact: In a whole-home remodel where most exterior walls are opened, the inspector may require a blower door test before final approval. This means careful attention to air sealing at all penetrations, rim joists, window and door rough openings, and top and bottom plates during construction. Iron Crest incorporates air sealing best practices into every whole-home remodel as a matter of standard practice.
LED Lighting Requirements
The IECC 2018 requires that at least 75% of permanently installed lighting fixtures (or the lamps in those fixtures) be high-efficacy. In practice, this means LED fixtures or LED lamps for all new lighting installed during your remodel.
Practical impact: All new recessed lights, vanity lights, under- cabinet lights, and ceiling fixtures installed on new circuits should be LED or LED-compatible. The electrical inspector will verify lighting efficacy as part of the final electrical inspection. Given that LED is now the industry standard and provides significant energy savings, this requirement aligns with what most homeowners already prefer.
A whole-home remodel requires the most inspections of any residential project. The typical inspection sequence follows the logical order of construction, with each inspection verifying a specific phase before work can proceed. Here is the complete inspection schedule you can expect.
Rough-In Inspections
Foundation / Footing(If applicable)
Required when new footings are poured for structural posts or beams. The inspector verifies footing dimensions, rebar placement, soil bearing, and drainage before concrete is placed. Must be scheduled before the concrete pour.
Framing / Structural
Verifies all structural work matches the approved engineering drawings: beam sizing, post connections, Simpson hardware, header installation, joist modifications, and fastener patterns. This is the most critical inspection for structural integrity.
Rough Electrical
Inspects all new wiring, junction boxes, panel connections, and circuit layouts before walls are closed. Wire gauge, box fill calculations, ground connections, AFCI/GFCI breaker installations, and dedicated circuits are all verified.
Rough Plumbing
Examines all new supply lines, drain lines, vent connections, and fixture rough-ins. Pipe sizing, drain slope, material compliance, vent configuration, and water pressure testing are verified.
Rough Mechanical
Inspects HVAC ductwork routing, equipment placement, gas piping, exhaust fan installations, and ventilation system components before they are concealed. Includes gas line pressure testing if applicable.
Insulation
Required when exterior walls are opened. Verifies insulation type, R-value, proper installation (no gaps, compressions, or voids), vapor barrier placement, and air sealing at penetrations. Must pass before drywall installation.
Final Inspections
Final Electrical
Tests all circuits, verifies GFCI protection in kitchens, bathrooms, laundry, garage, and outdoor locations. Confirms AFCI protection in bedrooms and living spaces. Checks outlet polarity, fixture operation, panel labeling, smoke and CO detector wiring, and LED lighting compliance.
Final Plumbing
Checks all fixture connections (sinks, toilets, showers, tubs, dishwasher, water heater), verifies no leaks under pressure, tests drainage at each fixture, confirms hot and cold supply is correct, and verifies anti-scald valve function at all shower and tub valves.
Final Mechanical
Verifies HVAC system operation, thermostat function, duct connections and sealing, exhaust fan operation and CFM ratings, range hood venting, and makeup air provisions. Tests heating and cooling output at registers in remodeled spaces.
Final Building
The comprehensive final inspection verifies that all work matches approved plans, all other trade inspections have passed, smoke and CO detectors are properly installed and interconnected, egress windows meet requirements, stairways comply with code, and the completed project meets all applicable codes. This is the last inspection before permits are closed.
Blower Door Test
If required by the energy code compliance path, a third-party blower door test measures the home's air leakage rate. The result must meet the 3 ACH50 maximum for Climate Zone 5. This test is typically scheduled after all drywall, windows, doors, and penetration sealing is complete but before final trim.
Scheduling Tips
Schedule inspections with at least 24-hour notice through the city or county online portal. Morning inspections are typically available between 7:30 AM and noon. Inspectors appreciate a clean, accessible job site with all work clearly visible.
Common Fail Points
Missing GFCI/AFCI protection, incomplete fire stopping, insufficient insulation coverage, incorrect drain slope, missing handrail graspability, and smoke detector interconnection issues are the most common inspection failures we see in the Boise market.
Re-Inspection Fees
If an inspection fails, a re-inspection fee of $50 to $100 is charged by most jurisdictions in Ada County. Iron Crest's quality control process includes pre-inspection verification to minimize re-inspection costs and schedule delays.
Common questions about permits and regulations for whole-home remodels in the Boise area.
How many permits do I need for a whole-home remodel in Boise?
Most whole-home remodels in Boise require multiple permits: a general building permit, separate electrical and plumbing permits, a mechanical (HVAC) permit, and potentially a gas permit. If structural work is involved (wall removal, roof modifications, foundation changes), a structural engineering review is required as part of the building permit. Iron Crest Remodel identifies every required permit during the design phase and handles all applications on your behalf.
How long does the permit process take for a whole-home remodel in Boise?
Plan review for a whole-home remodel in Boise typically takes 4 to 8 weeks due to the complexity and number of trades involved. Simple trade permits (electrical, plumbing) may be issued in 1 to 2 weeks, but the general building permit with structural review takes the longest. Submitting complete, well-organized plans on the first submission avoids revision cycles that can add 2 to 4 weeks. Iron Crest submits permits immediately after design approval to keep your project on schedule.
How much do whole-home remodel permits cost in Ada County?
Total permit costs for a whole-home remodel in Ada County typically range from $1,500 to $5,000 or more, depending on project valuation and scope. The building permit alone costs $400 to $2,000 based on valuation. Separate electrical, plumbing, and mechanical permits add $75 to $300 each. Structural engineering fees range from $1,000 to $5,000 for complex projects. Plan review fees are typically 65% of the building permit fee. Iron Crest includes all permit fees in your project estimate.
Can I live in my home during a whole-home remodel that requires permits?
It depends on the scope and the inspector's requirements. If the remodel affects all bathrooms, the kitchen, or the electrical panel, you may need to vacate temporarily. Boise building officials may require temporary occupancy restrictions when structural work compromises the building envelope or when all utilities are disconnected. Iron Crest plans phased construction when possible to minimize displacement, but full gut renovations typically require 2 to 4 weeks of temporary relocation.
What happens if a Boise building inspector fails an inspection on my remodel?
A failed inspection means the work does not meet code and must be corrected before construction can proceed past that phase. The inspector issues a correction notice specifying exactly what must be fixed. After corrections are made, a re-inspection is scheduled (re-inspection fees of $50 to $100 may apply). Iron Crest Remodel has an excellent track record of passing inspections on the first attempt because we build to code from the start and verify work before calling for inspection.
Do Ada County and Canyon County have different permit requirements?
Yes. Ada County (Boise, Meridian, Eagle, Garden City, Star, Kuna) and Canyon County (Nampa, Caldwell) operate separate building departments with slightly different fee schedules, application processes, and review timelines. Both adopt the same base codes (IRC 2018 with Idaho amendments), but local amendments and enforcement practices vary. Canyon County typically has shorter review times but less online portal access. Iron Crest is familiar with both jurisdictions and handles permits in either county.
Permits are one piece of the planning process. These companion guides cover cost, timeline, materials, and our overall remodeling process.
Whole-Home Remodel Cost Guide
Detailed pricing for comprehensive remodels
Whole-Home Remodel Timeline
Phase-by-phase scheduling breakdown
Materials Guide
Flooring, cabinets, countertops & more
Whole-Home Remodeling Service
Our full whole-home remodeling overview
Permits & Inspections Resource
General Boise permit guide for all projects
Design-Build Process
How our design-build approach works
The following government agencies, industry organizations, and official resources provide additional information relevant to your remodeling project.
We Handle All Permits for Your Whole-Home Remodel
Iron Crest Remodel manages every permit, engineering review, inspection, and code compliance requirement for your Boise whole-home remodel. From design to final approval, we handle it all.