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Residential Addition / Remodel Permit in Caldwell, Idaho

Required for additions, remodels, structural alterations, and accessory building permits for existing one- and two-family dwellings in Caldwell. Fences require only a permit application with minimal review. Separate trade permits required for any electrical, plumbing, and mechanical work.

Verified 2026-07-16 · Source

When you need this permit

  • Additions of conditioned or unconditioned space to an existing dwelling
  • Structural alterations, wall modifications, basement finishes creating living space
  • Decks and porches (with structural framing)
  • Fences — require only building permit application and minimal review (no full plan set)
  • Accessory buildings (garages, carports, sheds with electrical or exceeding exempt limits)
  • Residential additions/accessory buildings: site plan at 1/20 scale, floor plan with dimensions, wall section
  • Plan review fees paid in full at time of submittal

Required documents

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Fee schedule

Building Permit — valuation-based per Table 1Caldwell Building Safety Fees Resolution No. 300-25, Table 1
$34.00 (≤$499); $34.00 + $0.02624/$ ($500–$1,999); $64.37 + $0.01135/$ ($2,000–$24,999); $326.54 + $0.0085/$ ($25,000–$49,999); etc.
Residential Building Plan Review FeeResolution No. 300-25, Section I-D-2a
40% of building permit fee
Planning & Zoning Plan Review FeeResolution No. 300-25, Section I-D-2b
35% of building permit fee (minimum $55.00)
Engineering Plan Review FeeResolution No. 300-25, Section I-D-2c
20% of building permit fee
Reinspection (3rd inspection / 2nd reinspection for same segment)Resolution No. 300-25, Section V-C; first reinspection at no charge
$60.00

Review timeline

Plan reviewCaldwell’s published plan-review target
7–10 business days

How long did your Residential Addition / Remodel Permit permit actually take in Caldwell?

Anonymous — one question, no email. Answers are combined and only shown once at least 5 people have reported.

Inspection process

  1. 1

    Framing / Structural

    After framing complete, before walls covered — verify structure, blocking, egress

  2. 2

    MEP Rough-In

    Electrical, plumbing, and mechanical rough-ins before wall cover (under separate trade permits)

  3. 3

    Final

    All work complete per approved plans; Certificate of Completion issued

See the full Caldwell inspection guide — scheduling & re-inspection fees →

Tips

  • Fences only require a completed building permit application and minimal review — no full plan set required.
  • Separate permits are required for all electrical, plumbing, and mechanical work in additions and remodels.
  • Caldwell's residential plan review target is 7–10 business days (extendable up to 5 additional business days based on workload).

Frequently asked questions

Yes, if the project involves framing, electrical, plumbing, or mechanical work, or creates living space. Separate trade permits are required for electrical, plumbing, and mechanical installations.

In Caldwell, the published Building Permit — valuation-based per Table 1 is: $34.00 (≤$499); $34.00 + $0.02624/$ ($500–$1,999); $64.37 + $0.01135/$ ($2,000–$24,999); $326.54 + $0.0085/$ ($25,000–$49,999); etc.. Additional published fees: Residential Building Plan Review Fee — 40% of building permit fee; Planning & Zoning Plan Review Fee — 35% of building permit fee (minimum $55.00); Engineering Plan Review Fee — 20% of building permit fee; Reinspection (3rd inspection / 2nd reinspection for same segment) — $60.00. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

Caldwell's published plan-review target for a residential addition / remodel permit is 7–10 business days.

You'll need: Residential Addition Permit Packet; Construction Drawings. See the required-documents checklist on this page for details on each.

Caldwell requires 3 inspection(s) for a residential addition / remodel permit, in order: Framing / Structural, MEP Rough-In, Final. Schedule each through City of Caldwell Department of Building Safety ((208) 455-3024).

Apply through City of Caldwell Department of Building Safety at 205 South 6th Ave, Caldwell, ID 83605. Phone: (208) 455-3024, email: rcollins@cityofcaldwell.org. Office hours: Mon–Fri (inspection requests must be called in by 7:00 AM for same-day scheduling). Official information: https://www.cityofcaldwell.org/Departments/Community-Development/Building-Safety-Division.

Caldwell, Idaho has adopted: 2018 International Residential Code (IRC) — Parts I, II, III, IV and IX; 2018 International Building Code (IBC); 2018 International Existing Building Code (IEBC); 2018 International Fire Code (IFC); 2023 National Electrical Code (NEC) — Administrative Rules IDAPA 24.39.10 (Rules of the Idaho Electrical Board; renumbered from IDAPA 07.01.01–07.01.11); 2018 International Mechanical Code (IMC); 2018 International Fuel Gas Code (IFGC); 2017 Idaho State Plumbing Code — Based on the 2015 Uniform Plumbing Code; Administrative Rules IDAPA 24.39.20 (Rules Governing Plumbing; renumbered from IDAPA 07.02.02–07.02.07); 2018 International Energy Conservation Code (IECC) with State Amendments; 2018 International Property Maintenance Code; 1997 Uniform Code for the Abatement of Dangerous Buildings; 1997 Uniform Sign Code. Local amendments apply — see the Caldwell overview page for the full list.

Sources & verification

Verified against official sources. Last reviewed 2026-07-16.

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 Caldwell building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.

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Residential Addition / Remodel Permit in other cities

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