Washington

Washington home permit planning notes

Seismic risk, energy code, wildfire zones, shoreline rules, stormwater, septic, and city/county planning can affect documents.

What to verify locally

Local guides in Washington

Seattle, Washington

Seattle Deck Permit Guide

Seattle has clear deck triggers based on height, roof-deck status, and environmentally critical areas.

Seattle, Washington

Seattle Fence Permit Guide

Seattle fence permits depend heavily on height, masonry/concrete elements, and flood-prone locations.

Spokane, Washington

Spokane Residential Building Permit Guide

Spokane residential review covers new construction, additions, interior remodeling, fencing, demolition, accessory buildings, separate trade permits, inspections, and certificate of occupancy coordination.

Spokane, Washington

Spokane Deck, Fence, Roof, Window, and Solar Permit Guide

Spokane residential resources include deck construction, fence guidance, roofing, siding, windows, solar energy submittals, swimming pools, egress windows, and yard waivers.

Tacoma, Washington

Tacoma Residential Permit Guide

Tacoma permits are handled through Tacoma Permits for building, land use, site development, streets, driveways, sewer, stormwater, demolition, inspections, and status tracking.

Tacoma, Washington

Tacoma Deck, Fence, and Shed Permit Guide

Tacoma publishes clear permit thresholds for decks, porches, fences, masonry walls, and small storage sheds.

King County, Washington

King County Washington Residential Remodel and Addition Permit Guide

Unincorporated King County residential remodels, additions, deck work, garages, and many shed projects are handled through King County Permits and MyBuildingPermit.com.

King County, Washington

King County Washington Fence Permit Guide

In unincorporated King County, fence permit needs depend heavily on height, parcel zoning, setbacks, and whether the property is inside a city.

King County, Washington

King County Washington Residential Solar Permit Guide

King County residential rooftop solar may be exempt from a building permit when it stays within specific dead-load and roof-mounting limits, but electrical permits still run through Washington State Labor and Industries.

King County, Washington

King County Washington Building Inspection Planning Guide

King County building inspections for unincorporated-area permits are scheduled through MyBuildingPermit.com, with next-business-day requests generally needing to be entered before the county cutoff time.

Bellevue, Washington

Bellevue Washington Single-Family Addition and Deck Permit Guide

Bellevue uses the single-family addition permit for additions under 3,000 square feet, decks, detached accessory structures, pools, and several related trade scopes.

Bellevue, Washington

Bellevue Washington Trade, Solar, and EV Permit Guide

Bellevue issues electrical, mechanical, and plumbing permits as stand-alone permits or as part of construction projects, with EV chargers, solar panels, HVAC, generators, gas lines, and water heaters often requiring trade review.

Bellevue, Washington

Bellevue Washington Clearing, Grading, Tree, and Critical Area Permit Guide

Bellevue clearing and grading review can apply to single-family landscape changes, tree removal, rockeries, modular block walls, critical areas, and protected vegetation areas.

Vancouver, Washington

Vancouver Washington Residential Building Permit Guide

Vancouver residential permits cover one- and two-family work such as additions, remodels, ADUs, garage conversions, structural changes, footprint changes, and many driveway or RV pad projects.

Vancouver, Washington

Vancouver Washington Fence, Deck, and Shed Permit Exemption Guide

Vancouver allows small fences, low decks, and small sheds without a permit only when they stay within size or height limits and are outside environmentally sensitive areas.

Vancouver, Washington

Vancouver Washington Carport, Deck, Garage, Shed, and Shop Permit Checklist Guide

Vancouver's checklist for residential carports, decks, garages, sheds, and shops focuses on site plans, floor plans, foundation details, elevations, stormwater forms, and structural calculations.

Vancouver, Washington

Vancouver Washington Residential Solar Panel Permit Guide

Vancouver residential solar panel submittals include site plans, roof or structural layout, electrical plans, product specifications, and over-the-counter solar checklist forms.

Vancouver, Washington

Vancouver Washington Fence, Pool, and Retaining Wall Permit Guide

Vancouver fence, pool, and retaining wall permit packages focus on site location, wall and fence height, foundation details, stormwater review, structural engineering, and pool safety documents.

Seattle, Washington

Seattle, Washington ADU and Garage Conversion Permit Guide

Homeowners in Seattle, Washington, planning an accessory dwelling unit, garage apartment, basement apartment, or converted living space should confirm zoning, occupancy, utility, parking, and building-permit requirements before design work goes too far.

Seattle, Washington

Seattle, Washington Pool Spa and Barrier Permit Guide

Pool and spa projects in Seattle, Washington, should be checked for building permits, zoning setbacks, electrical bonding, drainage, alarms, gates, and barrier inspections before excavation or delivery.

Seattle, Washington

Seattle, Washington Roof Window and Exterior Permit Guide

Roof replacement, window replacement, siding, exterior doors, structural repairs, and weatherproofing work in Seattle, Washington, should be checked for permit, historic, energy, wind, and inspection requirements.

Seattle, Washington

Seattle, Washington Kitchen Bath and Basement Remodel Permit Guide

Remodels in Seattle, Washington, should be checked for building, electrical, plumbing, mechanical, insulation, egress, waterproofing, and final inspection requirements before walls are closed.

Seattle, Washington

Seattle, Washington Solar EV Charger and Generator Permit Guide

Homeowners in Seattle, Washington, planning solar panels, battery storage, EV chargers, panel upgrades, or standby generators should coordinate electrical permits, utility requirements, equipment placement, and inspections.

Seattle, Washington

Seattle, Washington Driveway Fence Shed and Site Permit Guide

Homeowners in Seattle, Washington, should check zoning, right-of-way, drainage, easements, setbacks, fence height, accessory structures, and inspections before building outside the house footprint.

Seattle, Washington

Seattle, Washington Addition Deck Porch and Patio Cover Permit Guide

Additions, decks, porches, balconies, and patio covers in Seattle, Washington, should be checked for zoning placement, structural plans, footings, ledger connections, stairs, guards, roof loads, and staged inspections.

Seattle, Washington

Seattle, Washington Electrical Panel Circuit and Rewiring Permit Guide

Panel replacements, service upgrades, new circuits, whole-home rewiring, subpanels, outlets, lighting, and dedicated appliance wiring in Seattle, Washington, should be coordinated with electrical permits, utility requirements, and inspections.

Seattle, Washington

Seattle, Washington Plumbing Water Heater Repipe and Sewer Permit Guide

Water heaters, repipes, fixture relocations, drain and vent changes, sewer laterals, backflow devices, and gas or water service work in Seattle, Washington, should be checked for plumbing permits and inspection hold points.

Seattle, Washington

Seattle, Washington HVAC Heat Pump Gas and Ventilation Permit Guide

Furnaces, heat pumps, air conditioners, mini-splits, ductwork, gas piping, range hoods, bath fans, and other ventilation work in Seattle, Washington, should be checked for mechanical, electrical, plumbing, and fuel-gas permits.

Seattle, Washington

Seattle, Washington Foundation Retaining Wall Grading and Drainage Permit Guide

Foundation repairs, retaining walls, excavation, fill, waterproofing, grading, drainage systems, and slope work in Seattle, Washington, should be checked for structural, zoning, stormwater, floodplain, and site inspections.

Seattle, Washington

Seattle, Washington Demolition Structural Wall Fireplace and Chimney Permit Guide

Interior demolition, load-bearing wall changes, chimney or fireplace work, structural openings, and full-structure removal in Seattle, Washington, should be checked for building, trade, utility, environmental, and inspection requirements.

Spokane, Washington

Spokane, Washington ADU and Garage Conversion Permit Guide

Homeowners in Spokane, Washington, planning an accessory dwelling unit, garage apartment, basement apartment, or converted living space should confirm zoning, occupancy, utility, parking, and building-permit requirements before design work goes too far.

Spokane, Washington

Spokane, Washington Pool Spa and Barrier Permit Guide

Pool and spa projects in Spokane, Washington, should be checked for building permits, zoning setbacks, electrical bonding, drainage, alarms, gates, and barrier inspections before excavation or delivery.

Spokane, Washington

Spokane, Washington Roof Window and Exterior Permit Guide

Roof replacement, window replacement, siding, exterior doors, structural repairs, and weatherproofing work in Spokane, Washington, should be checked for permit, historic, energy, wind, and inspection requirements.

Spokane, Washington

Spokane, Washington Kitchen Bath and Basement Remodel Permit Guide

Remodels in Spokane, Washington, should be checked for building, electrical, plumbing, mechanical, insulation, egress, waterproofing, and final inspection requirements before walls are closed.

Spokane, Washington

Spokane, Washington Solar EV Charger and Generator Permit Guide

Homeowners in Spokane, Washington, planning solar panels, battery storage, EV chargers, panel upgrades, or standby generators should coordinate electrical permits, utility requirements, equipment placement, and inspections.

Spokane, Washington

Spokane, Washington Driveway Fence Shed and Site Permit Guide

Homeowners in Spokane, Washington, should check zoning, right-of-way, drainage, easements, setbacks, fence height, accessory structures, and inspections before building outside the house footprint.

Spokane, Washington

Spokane, Washington Addition Deck Porch and Patio Cover Permit Guide

Additions, decks, porches, balconies, and patio covers in Spokane, Washington, should be checked for zoning placement, structural plans, footings, ledger connections, stairs, guards, roof loads, and staged inspections.

Spokane, Washington

Spokane, Washington Electrical Panel Circuit and Rewiring Permit Guide

Panel replacements, service upgrades, new circuits, whole-home rewiring, subpanels, outlets, lighting, and dedicated appliance wiring in Spokane, Washington, should be coordinated with electrical permits, utility requirements, and inspections.

Spokane, Washington

Spokane, Washington Plumbing Water Heater Repipe and Sewer Permit Guide

Water heaters, repipes, fixture relocations, drain and vent changes, sewer laterals, backflow devices, and gas or water service work in Spokane, Washington, should be checked for plumbing permits and inspection hold points.

Spokane, Washington

Spokane, Washington HVAC Heat Pump Gas and Ventilation Permit Guide

Furnaces, heat pumps, air conditioners, mini-splits, ductwork, gas piping, range hoods, bath fans, and other ventilation work in Spokane, Washington, should be checked for mechanical, electrical, plumbing, and fuel-gas permits.

Spokane, Washington

Spokane, Washington Foundation Retaining Wall Grading and Drainage Permit Guide

Foundation repairs, retaining walls, excavation, fill, waterproofing, grading, drainage systems, and slope work in Spokane, Washington, should be checked for structural, zoning, stormwater, floodplain, and site inspections.

Spokane, Washington

Spokane, Washington Demolition Structural Wall Fireplace and Chimney Permit Guide

Interior demolition, load-bearing wall changes, chimney or fireplace work, structural openings, and full-structure removal in Spokane, Washington, should be checked for building, trade, utility, environmental, and inspection requirements.

Tacoma, Washington

Tacoma, Washington ADU and Garage Conversion Permit Guide

Homeowners in Tacoma, Washington, planning an accessory dwelling unit, garage apartment, basement apartment, or converted living space should confirm zoning, occupancy, utility, parking, and building-permit requirements before design work goes too far.

Tacoma, Washington

Tacoma, Washington Pool Spa and Barrier Permit Guide

Pool and spa projects in Tacoma, Washington, should be checked for building permits, zoning setbacks, electrical bonding, drainage, alarms, gates, and barrier inspections before excavation or delivery.

Tacoma, Washington

Tacoma, Washington Roof Window and Exterior Permit Guide

Roof replacement, window replacement, siding, exterior doors, structural repairs, and weatherproofing work in Tacoma, Washington, should be checked for permit, historic, energy, wind, and inspection requirements.

Tacoma, Washington

Tacoma, Washington Kitchen Bath and Basement Remodel Permit Guide

Remodels in Tacoma, Washington, should be checked for building, electrical, plumbing, mechanical, insulation, egress, waterproofing, and final inspection requirements before walls are closed.

Tacoma, Washington

Tacoma, Washington Solar EV Charger and Generator Permit Guide

Homeowners in Tacoma, Washington, planning solar panels, battery storage, EV chargers, panel upgrades, or standby generators should coordinate electrical permits, utility requirements, equipment placement, and inspections.

Tacoma, Washington

Tacoma, Washington Driveway Fence Shed and Site Permit Guide

Homeowners in Tacoma, Washington, should check zoning, right-of-way, drainage, easements, setbacks, fence height, accessory structures, and inspections before building outside the house footprint.

Tacoma, Washington

Tacoma, Washington Addition Deck Porch and Patio Cover Permit Guide

Additions, decks, porches, balconies, and patio covers in Tacoma, Washington, should be checked for zoning placement, structural plans, footings, ledger connections, stairs, guards, roof loads, and staged inspections.

Tacoma, Washington

Tacoma, Washington Electrical Panel Circuit and Rewiring Permit Guide

Panel replacements, service upgrades, new circuits, whole-home rewiring, subpanels, outlets, lighting, and dedicated appliance wiring in Tacoma, Washington, should be coordinated with electrical permits, utility requirements, and inspections.

Tacoma, Washington

Tacoma, Washington Plumbing Water Heater Repipe and Sewer Permit Guide

Water heaters, repipes, fixture relocations, drain and vent changes, sewer laterals, backflow devices, and gas or water service work in Tacoma, Washington, should be checked for plumbing permits and inspection hold points.

Tacoma, Washington

Tacoma, Washington HVAC Heat Pump Gas and Ventilation Permit Guide

Furnaces, heat pumps, air conditioners, mini-splits, ductwork, gas piping, range hoods, bath fans, and other ventilation work in Tacoma, Washington, should be checked for mechanical, electrical, plumbing, and fuel-gas permits.

Tacoma, Washington

Tacoma, Washington Foundation Retaining Wall Grading and Drainage Permit Guide

Foundation repairs, retaining walls, excavation, fill, waterproofing, grading, drainage systems, and slope work in Tacoma, Washington, should be checked for structural, zoning, stormwater, floodplain, and site inspections.

Tacoma, Washington

Tacoma, Washington Demolition Structural Wall Fireplace and Chimney Permit Guide

Interior demolition, load-bearing wall changes, chimney or fireplace work, structural openings, and full-structure removal in Tacoma, Washington, should be checked for building, trade, utility, environmental, and inspection requirements.

King County, Washington

King County, Washington ADU and Garage Conversion Permit Guide

Homeowners in King County, Washington, planning an accessory dwelling unit, garage apartment, basement apartment, or converted living space should confirm zoning, occupancy, utility, parking, and building-permit requirements before design work goes too far.

King County, Washington

King County, Washington Pool Spa and Barrier Permit Guide

Pool and spa projects in King County, Washington, should be checked for building permits, zoning setbacks, electrical bonding, drainage, alarms, gates, and barrier inspections before excavation or delivery.

King County, Washington

King County, Washington Roof Window and Exterior Permit Guide

Roof replacement, window replacement, siding, exterior doors, structural repairs, and weatherproofing work in King County, Washington, should be checked for permit, historic, energy, wind, and inspection requirements.

King County, Washington

King County, Washington Kitchen Bath and Basement Remodel Permit Guide

Remodels in King County, Washington, should be checked for building, electrical, plumbing, mechanical, insulation, egress, waterproofing, and final inspection requirements before walls are closed.

King County, Washington

King County, Washington Solar EV Charger and Generator Permit Guide

Homeowners in King County, Washington, planning solar panels, battery storage, EV chargers, panel upgrades, or standby generators should coordinate electrical permits, utility requirements, equipment placement, and inspections.

King County, Washington

King County, Washington Driveway Fence Shed and Site Permit Guide

Homeowners in King County, Washington, should check zoning, right-of-way, drainage, easements, setbacks, fence height, accessory structures, and inspections before building outside the house footprint.

King County, Washington

King County, Washington Addition Deck Porch and Patio Cover Permit Guide

Additions, decks, porches, balconies, and patio covers in King County, Washington, should be checked for zoning placement, structural plans, footings, ledger connections, stairs, guards, roof loads, and staged inspections.

King County, Washington

King County, Washington Electrical Panel Circuit and Rewiring Permit Guide

Panel replacements, service upgrades, new circuits, whole-home rewiring, subpanels, outlets, lighting, and dedicated appliance wiring in King County, Washington, should be coordinated with electrical permits, utility requirements, and inspections.

King County, Washington

King County, Washington Plumbing Water Heater Repipe and Sewer Permit Guide

Water heaters, repipes, fixture relocations, drain and vent changes, sewer laterals, backflow devices, and gas or water service work in King County, Washington, should be checked for plumbing permits and inspection hold points.

King County, Washington

King County, Washington HVAC Heat Pump Gas and Ventilation Permit Guide

Furnaces, heat pumps, air conditioners, mini-splits, ductwork, gas piping, range hoods, bath fans, and other ventilation work in King County, Washington, should be checked for mechanical, electrical, plumbing, and fuel-gas permits.

King County, Washington

King County, Washington Foundation Retaining Wall Grading and Drainage Permit Guide

Foundation repairs, retaining walls, excavation, fill, waterproofing, grading, drainage systems, and slope work in King County, Washington, should be checked for structural, zoning, stormwater, floodplain, and site inspections.

King County, Washington

King County, Washington Demolition Structural Wall Fireplace and Chimney Permit Guide

Interior demolition, load-bearing wall changes, chimney or fireplace work, structural openings, and full-structure removal in King County, Washington, should be checked for building, trade, utility, environmental, and inspection requirements.

Bellevue, Washington

Bellevue, Washington ADU and Garage Conversion Permit Guide

Homeowners in Bellevue, Washington, planning an accessory dwelling unit, garage apartment, basement apartment, or converted living space should confirm zoning, occupancy, utility, parking, and building-permit requirements before design work goes too far.

Bellevue, Washington

Bellevue, Washington Pool Spa and Barrier Permit Guide

Pool and spa projects in Bellevue, Washington, should be checked for building permits, zoning setbacks, electrical bonding, drainage, alarms, gates, and barrier inspections before excavation or delivery.

Bellevue, Washington

Bellevue, Washington Roof Window and Exterior Permit Guide

Roof replacement, window replacement, siding, exterior doors, structural repairs, and weatherproofing work in Bellevue, Washington, should be checked for permit, historic, energy, wind, and inspection requirements.

Bellevue, Washington

Bellevue, Washington Kitchen Bath and Basement Remodel Permit Guide

Remodels in Bellevue, Washington, should be checked for building, electrical, plumbing, mechanical, insulation, egress, waterproofing, and final inspection requirements before walls are closed.

Bellevue, Washington

Bellevue, Washington Solar EV Charger and Generator Permit Guide

Homeowners in Bellevue, Washington, planning solar panels, battery storage, EV chargers, panel upgrades, or standby generators should coordinate electrical permits, utility requirements, equipment placement, and inspections.

Bellevue, Washington

Bellevue, Washington Driveway Fence Shed and Site Permit Guide

Homeowners in Bellevue, Washington, should check zoning, right-of-way, drainage, easements, setbacks, fence height, accessory structures, and inspections before building outside the house footprint.

Bellevue, Washington

Bellevue, Washington Addition Deck Porch and Patio Cover Permit Guide

Additions, decks, porches, balconies, and patio covers in Bellevue, Washington, should be checked for zoning placement, structural plans, footings, ledger connections, stairs, guards, roof loads, and staged inspections.

Bellevue, Washington

Bellevue, Washington Electrical Panel Circuit and Rewiring Permit Guide

Panel replacements, service upgrades, new circuits, whole-home rewiring, subpanels, outlets, lighting, and dedicated appliance wiring in Bellevue, Washington, should be coordinated with electrical permits, utility requirements, and inspections.

Bellevue, Washington

Bellevue, Washington Plumbing Water Heater Repipe and Sewer Permit Guide

Water heaters, repipes, fixture relocations, drain and vent changes, sewer laterals, backflow devices, and gas or water service work in Bellevue, Washington, should be checked for plumbing permits and inspection hold points.

Bellevue, Washington

Bellevue, Washington HVAC Heat Pump Gas and Ventilation Permit Guide

Furnaces, heat pumps, air conditioners, mini-splits, ductwork, gas piping, range hoods, bath fans, and other ventilation work in Bellevue, Washington, should be checked for mechanical, electrical, plumbing, and fuel-gas permits.

Bellevue, Washington

Bellevue, Washington Foundation Retaining Wall Grading and Drainage Permit Guide

Foundation repairs, retaining walls, excavation, fill, waterproofing, grading, drainage systems, and slope work in Bellevue, Washington, should be checked for structural, zoning, stormwater, floodplain, and site inspections.

Bellevue, Washington

Bellevue, Washington Demolition Structural Wall Fireplace and Chimney Permit Guide

Interior demolition, load-bearing wall changes, chimney or fireplace work, structural openings, and full-structure removal in Bellevue, Washington, should be checked for building, trade, utility, environmental, and inspection requirements.

Vancouver, Washington

Vancouver, Washington ADU and Garage Conversion Permit Guide

Homeowners in Vancouver, Washington, planning an accessory dwelling unit, garage apartment, basement apartment, or converted living space should confirm zoning, occupancy, utility, parking, and building-permit requirements before design work goes too far.

Vancouver, Washington

Vancouver, Washington Pool Spa and Barrier Permit Guide

Pool and spa projects in Vancouver, Washington, should be checked for building permits, zoning setbacks, electrical bonding, drainage, alarms, gates, and barrier inspections before excavation or delivery.

Vancouver, Washington

Vancouver, Washington Roof Window and Exterior Permit Guide

Roof replacement, window replacement, siding, exterior doors, structural repairs, and weatherproofing work in Vancouver, Washington, should be checked for permit, historic, energy, wind, and inspection requirements.

Vancouver, Washington

Vancouver, Washington Kitchen Bath and Basement Remodel Permit Guide

Remodels in Vancouver, Washington, should be checked for building, electrical, plumbing, mechanical, insulation, egress, waterproofing, and final inspection requirements before walls are closed.

Vancouver, Washington

Vancouver, Washington Solar EV Charger and Generator Permit Guide

Homeowners in Vancouver, Washington, planning solar panels, battery storage, EV chargers, panel upgrades, or standby generators should coordinate electrical permits, utility requirements, equipment placement, and inspections.

Vancouver, Washington

Vancouver, Washington Driveway Fence Shed and Site Permit Guide

Homeowners in Vancouver, Washington, should check zoning, right-of-way, drainage, easements, setbacks, fence height, accessory structures, and inspections before building outside the house footprint.

Vancouver, Washington

Vancouver, Washington Addition Deck Porch and Patio Cover Permit Guide

Additions, decks, porches, balconies, and patio covers in Vancouver, Washington, should be checked for zoning placement, structural plans, footings, ledger connections, stairs, guards, roof loads, and staged inspections.

Vancouver, Washington

Vancouver, Washington Electrical Panel Circuit and Rewiring Permit Guide

Panel replacements, service upgrades, new circuits, whole-home rewiring, subpanels, outlets, lighting, and dedicated appliance wiring in Vancouver, Washington, should be coordinated with electrical permits, utility requirements, and inspections.

Vancouver, Washington

Vancouver, Washington Plumbing Water Heater Repipe and Sewer Permit Guide

Water heaters, repipes, fixture relocations, drain and vent changes, sewer laterals, backflow devices, and gas or water service work in Vancouver, Washington, should be checked for plumbing permits and inspection hold points.

Vancouver, Washington

Vancouver, Washington HVAC Heat Pump Gas and Ventilation Permit Guide

Furnaces, heat pumps, air conditioners, mini-splits, ductwork, gas piping, range hoods, bath fans, and other ventilation work in Vancouver, Washington, should be checked for mechanical, electrical, plumbing, and fuel-gas permits.

Vancouver, Washington

Vancouver, Washington Foundation Retaining Wall Grading and Drainage Permit Guide

Foundation repairs, retaining walls, excavation, fill, waterproofing, grading, drainage systems, and slope work in Vancouver, Washington, should be checked for structural, zoning, stormwater, floodplain, and site inspections.

Vancouver, Washington

Vancouver, Washington Demolition Structural Wall Fireplace and Chimney Permit Guide

Interior demolition, load-bearing wall changes, chimney or fireplace work, structural openings, and full-structure removal in Vancouver, Washington, should be checked for building, trade, utility, environmental, and inspection requirements.

Projects to check first

ProjectWhy it matters
Shed PermitUsually required once the shed exceeds a local size threshold, has a permanent foundation, includes utilities, or violates zoning setbacks.
Fence PermitOften required for tall fences, front-yard fences, corner lots, pool barriers, retaining-wall combinations, and historic districts.
Deck PermitAlmost always required for attached decks, elevated decks, structural repairs, and decks with stairs or guards.
EV Charger PermitUsually required for Level 2 hardwired chargers, panel upgrades, new circuits, and garage wiring changes.
Solar PermitAlmost always required. Solar normally needs building/electrical permits and separate utility interconnection approval.
Bathroom Remodel PermitOften required when plumbing, electrical, framing, ventilation, or waterproofing systems are changed.
HVAC Replacement PermitUsually required for furnace, condenser, heat pump, major duct, gas line, and equipment-location changes.
Basement Finishing PermitUsually required when unfinished space becomes habitable, especially with bedrooms, bathrooms, or new walls.

Best first call

Start with the city building department if the property is inside city limits. If not, call the county building or planning office and ask which authority has jurisdiction for zoning, building, and trade inspections.