Residential Addition / Remodel / Alteration Permit in Post Falls, Idaho
VerifiedRequired for additions, interior finish/remodels, decks, patio covers, garages, and other alterations to existing residential structures in Post Falls, governed by the 2018 IRC as locally adopted, with dedicated per-square-foot valuation rates distinct from new-home construction.
Verified 2026-07-03 · Source
When you need this permit
- 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
Required documents
- Required
Building Permit Application
Submitted online through the Community Development Portal
- Optional
Residential Deck Guide
City of Post Falls guide for residential deck construction and permitting
- Required
Construction Drawings
Site plan and framing/structural details showing scope of work and connection to the existing structure, per Residential Building Plan Submittal Requirements
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Additions to Residential Homes | $72.62 per sq ft (use Valuation Chart to calculate permit and plan review fee) | City of Post Falls Fee Schedule, rev 10-1-2025 |
| Interior Finish Residential Homes | $20.00 per sq ft (use Valuation Chart to calculate permit and plan review fee) | City of Post Falls Fee Schedule, rev 10-1-2025 |
| Basement — Finished | $96.83 per sq ft (use Valuation Chart to calculate permit and plan review fee) | City of Post Falls Fee Schedule, rev 10-1-2025 |
| Basement — Unfinished | $77.46 per sq ft (use Valuation Chart to calculate permit and plan review fee) | City of Post Falls Fee Schedule, rev 10-1-2025 |
| Residential Garage | $37.72 per sq ft (use Valuation Chart to calculate permit and plan review fee) | City of Post Falls Fee Schedule, rev 10-1-2025 |
| Pole Building Residential | $20.00 per sq ft (use Valuation Chart to calculate permit and plan review fee) | City of Post Falls Fee Schedule, rev 10-1-2025 |
| Deck Only | $15.00 per sq ft (use Valuation Chart to calculate permit and plan review fee) | City of Post Falls Fee Schedule, rev 10-1-2025 |
| Deck with Cover | $20.00 per sq ft (use Valuation Chart to calculate permit and plan review fee) | City of Post Falls Fee Schedule, rev 10-1-2025 |
| Deck/Patio Cover and Enclosure | $25.00 per sq ft (use Valuation Chart to calculate permit and plan review fee) | City of Post Falls Fee Schedule, rev 10-1-2025 |
| Patio Cover Only | $20.00 per sq ft (use Valuation Chart to calculate permit and plan review fee) | City of Post Falls Fee Schedule, rev 10-1-2025 |
| Breezeway | $20.00 per sq ft (use Valuation Chart to calculate permit and plan review fee) | City of Post Falls Fee Schedule, rev 10-1-2025 |
| Residential Plan Review (Building Plan Check) | 25% of the Building Permit fee | City of Post Falls Fee Schedule, rev 10-1-2025 |
| Changes to Approved Plans | $100.00 per hour, one half-hour minimum | City of Post Falls Fee Schedule, rev 10-1-2025 |
Review timeline
10–10 business days
Post Falls’s published plan-review target
Inspection process
- 1
Footing/Foundation
Required before concrete pour for deck posts, garage foundations, or addition footings
- 2
Framing
Structural framing and connections to the existing structure per plans
- 3
Final
All work complete per approved plans
Tips
- Post Falls prices additions ($72.62/sq ft), interior finish ($20/sq ft), garages ($37.72/sq ft), and decks ($15-25/sq ft depending on cover/enclosure) separately from new-home living space ($96.83/sq ft) — use the correct category on the Valuation Chart.
- The Residential Deck Guide (PDF) is available from the City's Document Center for deck-specific plan requirements.
- Walls over 12 feet tall require an Idaho-licensed engineer's stamped design.
Frequently asked questions
- How is a home addition valued for permit fees in Post Falls?
- 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.
Sources & verification
Verified against official sources. Last reviewed 2026-07-03.
- City of Post Falls Community Development Department, Building Division — official building department
- Fee Schedule (PDF) | City of Post Falls
- Residential Deck Guide (PDF) | City of Post Falls
- Residential Building Plan Submittal Requirements (PDF) | City of Post Falls
- Idaho Code § 39-4117 — Processing Building Permits — Timely Review (Idaho State Legislature)
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 Post Falls building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.
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