Residential Addition / Remodel / Alteration Permit in Post Falls, Idaho

Post Falls requires a residential addition / remodel / alteration permit for: Building permit required for additions, interior finish, garages, decks, patio covers, breezeways, and basement finish work; If plans are for an addition, they must also show the adjoining existing areas and their use; Stairs, decks, and porches must show attachment/ledger details in the foundation plan; walls over 12 feet in height must be designed and stamped by an Idaho-licensed engineer; New structures/additions with a floor-area increase greater than 25% must meet Post Falls Municipal Code Section 18.24.020 (General Standards); Site plan required showing setbacks, lot coverage percentage, and existing/proposed structure footprints; Apply through the Community Development Portal. If your project isn't listed, confirm with City of Post Falls Community Development Department, Building Division at (208) 773-8708 before starting work.

In Post Falls, the published Additions to Residential Homes is: $72.62 per sq ft (use Valuation Chart to calculate permit and plan review fee). Additional published fees: Interior Finish Residential Homes — $20.00 per sq ft (use Valuation Chart to calculate permit and plan review fee); Basement — Finished — $96.83 per sq ft (use Valuation Chart to calculate permit and plan review fee); Basement — Unfinished — $77.46 per sq ft (use Valuation Chart to calculate permit and plan review fee); Residential Garage — $37.72 per sq ft (use Valuation Chart to calculate permit and plan review fee); Pole Building Residential — $20.00 per sq ft (use Valuation Chart to calculate permit and plan review fee); Deck Only — $15.00 per sq ft (use Valuation Chart to calculate permit and plan review fee); Deck with Cover — $20.00 per sq ft (use Valuation Chart to calculate permit and plan review fee); Deck/Patio Cover and Enclosure — $25.00 per sq ft (use Valuation Chart to calculate permit and plan review fee); Patio Cover Only — $20.00 per sq ft (use Valuation Chart to calculate permit and plan review fee); Breezeway — $20.00 per sq ft (use Valuation Chart to calculate permit and plan review fee); Residential Plan Review (Building Plan Check) — 25% of the Building Permit fee; Changes to Approved Plans — $100.00 per hour, one half-hour minimum. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

Post Falls's published plan-review target for a residential addition / remodel / alteration permit is 10–10 business days.

You'll need: Building Permit Application; Construction Drawings. Depending on your project, Post Falls may also ask for: Residential Deck Guide. See the required-documents checklist on this page for details on each.

Post Falls requires 3 inspection(s) for a residential addition / remodel / alteration permit, in order: Footing/Foundation, Framing, Final. Schedule each through City of Post Falls Community Development Department, Building Division ((208) 773-8708).

Apply through City of Post Falls Community Development Department, Building Division at 1st Floor of City Hall, 408 N Spokane St, Post Falls, ID 83854. Phone: (208) 773-8708, email: permits@postfalls.gov. Office hours: 8:00 a.m. to 5:00 p.m., Monday through Friday. Dedicated Building Inspections line: (208) 457-3334 — leave permit number, job address, inspection type, and desired inspection date; requests left after midnight the night before cannot be scheduled for the following day.. Official information: https://www.postfalls.gov/175/Building.

Post Falls, Idaho has adopted: Idaho has a mandatory statewide building code administered by the Idaho Division of Building Safety (DBS, now organizationally under the Division of Occupational and Professional Licenses / DOPL) under the Idaho Building Code Act, Idaho Code Title 39, Chapter 41, negotiated and adopted through the Idaho Building Code Board. Local jurisdictions that adopt and locally administer the code must enforce it at least as strictly as the state minimum; Post Falls administers its own Building Division for building, electrical, plumbing, and mechanical permitting within city limits. Source: City of Post Falls Current Adopted Codes and Design Criteria (Community Development Department, rev 02/16/25), https://www.postfalls.gov/DocumentCenter/View/750/Current-Codes-and-Design-Criteria-PDF; 2018 IBC (International Building Code), as adopted by the State of Idaho Building Code Board and locally administered by the City of Post Falls. Source: City of Post Falls Current Adopted Codes and Design Criteria (rev 02/16/25); 2018 IRC (International Residential Code), as adopted by the State of Idaho Building Code Board and locally administered by the City of Post Falls. Source: City of Post Falls Current Adopted Codes and Design Criteria (rev 02/16/25); 2018 IEBC (International Existing Building Code). Source: City of Post Falls Current Adopted Codes and Design Criteria (rev 02/16/25); 2018 IECC with 2012 Amendments for Residential (International Energy Conservation Code). Source: City of Post Falls Current Adopted Codes and Design Criteria (rev 02/16/25); 2018 IMC (International Mechanical Code). Source: City of Post Falls Current Adopted Codes and Design Criteria (rev 02/16/25); 2017 ISPC (Idaho State Plumbing Code) — Idaho's own state-amended plumbing code, not the Uniform or International Plumbing Code. Source: City of Post Falls Current Adopted Codes and Design Criteria (rev 02/16/25); 2018 IFGC (International Fuel Gas Code). Source: City of Post Falls Current Adopted Codes and Design Criteria (rev 02/16/25); 2023 NEC (National Electrical Code). Source: City of Post Falls Current Adopted Codes and Design Criteria (rev 02/16/25); ICC A117.1-2009 (Accessibility). Source: City of Post Falls Current Adopted Codes and Design Criteria (rev 02/16/25); 2009 IPMC (International Property Maintenance Code), with amendments. Source: City of Post Falls Current Adopted Codes and Design Criteria (rev 02/16/25); The City of Post Falls Building Division directly issues and inspects electrical and plumbing permits within city limits (the Division's own permit-fee schedule lists dedicated Electrical Permits and Plumbing Permits fee tables administered by the City); this reflects local administration rather than direct-state DOPL/Division of Building Safety issuance for in-city work. Source: City of Post Falls Fee Schedule (Community Development Department, rev 10-1-2025), https://www.postfalls.gov/DocumentCenter/View/815/Fee-Schedule-PDF. Local amendments apply — see the Post Falls overview page for the full list.

Additions to residential homes are valued at $72.62 per square foot, then run through the City's Valuation Chart to calculate the Building Permit fee, plus a 25% plan-review fee. Source: City of Post Falls Fee Schedule, rev 10-1-2025.