Bolthole Index

Kootenai County, Idaho

Building permits, zoning and septic rules in Post Falls, Idaho

Post Falls, Idaho requires appropriate building and land-use permits for construction inside city limits, and the city administers its own zoning.12 The Post Falls Building Division handles building permits; Panhandle Health District handles septic systems where municipal sewer is unavailable.34 For land outside city limits, use the Kootenai County guide for the county’s building-permit rules.5

At a glance

Building permits
Required for applicable construction inside Post Falls; city Building Division issues them13
Zoning
City zoning applies inside Post Falls city limits2
Septic permits
Panhandle Health District, where public or municipal sewer is unavailable4
RV floodplain limits
In Areas of Special Flood Hazard, an allowed RV must stay fewer than 180 consecutive days and remain ready for highway use6
RV street parking
No more than 48 continuous hours at the same location or locations within the same block7
Owner-builder
Idaho’s contractor-registration exemption does not waive applicable building or trade permits8
Private wells
An IDWR drilling permit and licensed well driller are required before drilling9

Who to call

Building permits

Post Falls Building Division

City building, plumbing and electrical permits, plan review and inspections

208-773-8708

tgallop@postfalls.gov

1st Floor of City Hall 408 N Spokane Street Post Falls ID 83854

Online permits →

Planning & zoning

Post Falls Planning Division

City zoning, land-use management and planning applications

208-773-8708

1st Floor of City Hall 408 N Spokane Street Post Falls ID 83854

Online permits →

Septic permits

Panhandle Health District, Environmental Health - Kootenai County

Septic (subsurface sewage disposal) permits, installer licensing and septic records for Kootenai County

(208) 415-5220

ehapplications@phd1.idaho.gov

8500 N. Atlas Rd. Hayden, ID 83835

Contact details are copied from each office’s official page and were checked against it on October 11, 2026.

Off-grid gear

Going off-grid in Post Falls means bringing your own water and power. The kit we’d start with:

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Do you need a building permit in Post Falls, ID?

Post Falls requires all appropriate building and land-use permits for construction projects inside city limits; ask the Building Division which approvals apply to the proposed work before starting.1 The city Building Division performs plan review, issues building permits and inspects new and existing residential and commercial construction.3 Post Falls also issues plumbing and electrical permits and performs those inspections for work inside the city.3

An Idaho owner doing work on their own land may qualify for the contractor-registration exemption when the owner does not intend to sell within 12 months, but that exemption does not remove applicable building, trade or inspection requirements.8

Who issues building permits in Post Falls, and how do you apply?

Contact the Post Falls Building Division at 208-773-8708 for building-permit questions, or use tgallop@postfalls.gov; the counter is on the first floor of City Hall.3 Post Falls accepts Building, Planning and Engineering applications through the Community Development Portal, where customers can upload plans, pay fees, schedule inspections and see inspection results.3

For a building inspection, call 208-457-3334 and leave the permit number, job address, inspection type and requested date.3 Inspection requests left after midnight cannot be scheduled for the following day, so plan the call before the work reaches its inspection stage.3

Does Post Falls have zoning, and what does it mean for a home site?

Post Falls administers its own zoning inside city limits and publishes a land-use chart identifying permitted, special and nonpermitted uses by zoning classification.2 The Post Falls Planning Division handles land-use management and planning applications; call 208-773-8708 with the parcel and proposed use to ask which city zoning requirements apply.10

A narrow lot can change the driveway layout: in R-2 (SF), lots 45 feet wide or less must have alley- or rear-loaded vehicular access.11 Ask Planning to confirm the district, allowed dwelling type, lot dimensions and placement requirements before choosing a house plan; city zoning and building-permit review are separate parts of the project.21

How do septic permits work inside Post Falls?

Panhandle Health District handles septic systems serving Post Falls properties that cannot connect to public or municipal sewer, and a septic permit is required for a new system or a new system location.4 Reach the district’s Kootenai County Environmental Health office at (208) 415-5220 or ehapplications@phd1.idaho.gov.12

Septic approval depends on sewage flow, house size and location, nearby wells and surface water, groundwater, soil conditions and proposed land use, so resolve wastewater feasibility before fixing the house location.13 District septic applications and issued septic permits are valid for 1 year; arrange renewal before expiration if construction is delayed.12 Idaho allows a septic permit to be denied when public or central wastewater treatment is reasonably accessible, so an off-grid plan does not guarantee approval to use septic instead of sewer.14

Can you live in an RV or tiny home on land in Post Falls?

Post Falls’ RV rule for Areas of Special Flood Hazard requires an RV to be an allowed zoning use or structure, remain fewer than 180 consecutive days, and be fully licensed and ready for highway use.6 The floodplain rule also requires wheels or a jacking system, quick-disconnect utility and security connections, and no permanently attached structures or additions.6 That conditional floodplain rule does not establish permission for year-round RV living elsewhere in Post Falls; ask the Planning Division about the proposed parcel and occupancy before relying on an RV during construction.610

Post Falls limits continuous RV parking or storage on a public street or alley to 48 hours at the same location or combination of locations within the same block.7 For a tiny home, ask Planning how the dwelling is classified and whether the district allows that use, then ask Building which construction approvals apply.21

Building a home in Post Falls: what are the steps in order?

  1. Ask Post Falls Planning to confirm the zoning classification and whether the proposed home use is permitted or needs special approval.210
  2. Establish the wastewater route: if municipal sewer is unavailable, take the house and site proposal to Panhandle Health District for septic review.413
  3. Create a city portal account, submit the applicable building and land-use applications, upload plans and documents, and track plan reviews.151
  4. Coordinate plumbing and electrical permits with the city Building Division and schedule the required building inspections as construction progresses.3
  5. If the project includes a private well, obtain the IDWR drilling permit before drilling and use an IDWR-licensed driller.9
  6. If access involves a state highway, obtain the applicable ITD encroachment approval before work in the highway right-of-way.16

Watch-outs

  • We could not confirm a general Post Falls minimum dwelling floor area or a private-land temporary-camping rule; ask the city Planning Division before buying for either use.10
  • Kootenai County’s owner-builder rules do not establish a city building-permit exemption; obtain the applicable Post Falls construction approvals.18
  • A manufactured home must be inspected and approved by DOPL or the authority having jurisdiction before occupancy in Idaho.17

Sources

  1. Standard Drawings | Post Falls, ID (Post Falls), quoted and re-checked
  2. Post Falls Code § 18.20.030, Land use table (Post Falls), quoted and re-checked
  3. Post Falls Building Division (postfalls.gov)
  4. Septic Permits & Records – Panhandle Health District (Post Falls), quoted and re-checked
  5. Building | Kootenai County, ID, quoted and re-checked
  6. Post Falls Code § 15.44.160, Recreational vehicle standards (Post Falls), quoted and re-checked
  7. Post Falls Code § 10.20.060, Time limitation (Post Falls), quoted and re-checked
  8. Frequently Asked Questions (FAQ) - Division of Occupational and Professional Licenses (Idaho statewide rule), quoted and re-checked
  9. Wells Overview (Idaho statewide rule), quoted and re-checked
  10. Post Falls Planning Division (postfalls.gov)
  11. postfalls.gov (Post Falls), quoted and re-checked
  12. Panhandle Health District, Environmental Health - Kootenai County (panhandlehealthdistrict.org)
  13. Septic Permits & Records – Panhandle Health District, quoted and re-checked
  14. IDAPA 58.01.03 Individual/Subsurface Sewage Disposal Rules (Idaho statewide rule), quoted and re-checked
  15. City of Post Falls Building Division (Post Falls), quoted and re-checked
  16. Types of Right-of-Way Encroachment Permits (Idaho statewide rule), quoted and re-checked
  17. Building Archives - Division of Occupational and Professional Licenses (Idaho statewide rule), quoted and re-checked

Written October 11, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

Answers from the rulebook for Post Falls

Post Falls’s own rules

  • Building permitRequired

    Construction projects inside Post Falls city limits, including land-use and building work.

    • The city page says all appropriate permits are required for construction projects; exact permit exemptions were not located in the reviewed sources.
    “obtain all appropriate permits (including without limitation land use and building permits) concerning any construction project you undertake within the City of Post Falls.”
  • Building code adoptedAdopted (with conditions)

    Residential construction inside Post Falls city limits.

    • The city adopted the 2018 IRC with listed local exceptions and amendments.
    • State Building Code Board amendments or revisions are included.
    “The 2018 International Residential Code (IRC), prepared by the International Code Council, Inc., as adopted by the State of Idaho through the Idaho Building Code Board, together with any amendments or revisions to the IRC made by the Idaho Building Code Board through the negotiated rulemaking process, is adopted with the following exceptions or amendments.”
  • Local zoningPresent (with conditions)

    Land inside Post Falls city limits.

    • Uses are governed by the applicable zoning classification shown in the city land-use table.
    “Land Use Category | Zoning Classifications | LBCS Code | R1S | R1 | R2 | R3 | LC | CCS | I | TM | CCM | RM”
  • Zoning districtsPublished (with conditions)

    Land inside Post Falls city limits subject to Title 18 zoning.

    • The published table identifies classifications including R1S, R1, R2, R3, LC, CCS, I, TM, CCM, and RM.
    “Land Use Category | Zoning Classifications | LBCS Code | R1S | R1 | R2 | R3 | LC | CCS | I | TM | CCM | RM”
  • Minimum lot sizeDistrict specific (with conditions)

    Single-family tiny home development inside Post Falls city limits.

    • Corner lots may not be narrower than 25 feet.
    • The provision applies to single-family tiny home development, not all single-family homes.

    minimum lot area: >= 2000 square feet (Single-family tiny home development.)

    “Minimum Lot area: two thousand (2,000) square feet. Corner Lots shall not be narrower than twenty-five (25) feet.”
  • Building heightDistrict specific (with conditions)

    Multifamily structures above 35 feet adjacent to R1, R1S, R2, or SC3, and RM multifamily structures adjacent to specified dwelling types, inside Post Falls city limits.

    • The project must provide a Category B buffer yard or an additional one-foot setback for each foot of height above 35 feet.

    height trigger: > 35 feet (Specified multifamily exterior and RM adjacency conditions.)

    “Multi-family development with Structures above thirty-five (35) feet along the exterior of a development Site adjacent to an R1, R1S, R2 and SC3 zoning district or within the RM zoning district and adjacent to a Duplex House, Twin-Home, or Single-Family Home development Lot; must either provide a Buffer Yard meeting the requirements for a Category B Buffer under Section 18.24.080 (Table B) of this title or provide an additional one foot of setback for each foot of additional height over thirty-five (35) feet.”
  • Living in an RVTemporary only (with conditions)

    Recreational vehicles in Areas of Special Flood Hazard inside Post Falls city limits.

    • The RV must be an allowed use or structure under the zoning code.
    • The RV may remain fewer than 180 consecutive days.
    • It must be fully licensed and ready for highway use, on its wheels or jacking system, attached only by quick-disconnect utilities and security devices, with no permanently attached structures or additions.

    maximum consecutive days: < 180 days

    “Be on the site for fewer than one hundred eighty (180) consecutive days; and B. Be fully licensed and ready for highway use”
    One more reviewed finding on this topic
    • Limited — Parking or storage of recreational vehicles on the same public street or public alley location inside Post Falls city limits.
      “No Vehicle or Recreational Vehicle shall be Parked or stored continuously at the same location or combination of locations within the same block on any Public Street or public Alley on any Public Street or Alley in the City for more than forty-eight (48) hours.”
  • Tiny homesAllowed (with conditions)

    Tiny home residential development in R-2, R-3, LC, RM, qualifying CCM, CCS, and R-1 districts inside Post Falls city limits.

    • CCM eligibility requires an approved development agreement authorizing multifamily residential uses.
    • CCS and R-1 require a special use permit.
    • The standards in § 18.24.034 apply.
    “Tiny Home residential development is permitted in the R-2, R-3, LC and RM zoning districts. Tiny Home residential development is also allowed in those areas in the CCM zoning district where the approved development agreement for the property authorizes multi-family residential uses. Tiny Homes may also be approved with a Special Use Permit in the CCS and R-1 zoning districts.”
  • Mandatory utility hookupConditional

    A person connecting to the City of Post Falls water system inside Post Falls city limits.

    • This evidence regulates making a water connection; it does not establish a citywide mandatory water or sanitary-sewer connection distance threshold.
    • Written city consent and a completed application are required before a water-system connection or modification.
    “No Person shall make a connection to the city's water system or otherwise modify or tamper with any part of the public water supply system without first making application to the city and obtaining written consent from the city.”
  • Subdividing landRegulated (with conditions)

    Townhome development inside Post Falls city limits.

    • Townhome developments must comply with Title 17 subdivision standards and the § 18.20.130 site-plan review process unless otherwise approved by the zoning administrator.
    “Townhome developments shall comply with the standards set forth in title 17, "Subdivisions," of this Code and the Site plan review process per section 18.20.130 of this title, unless otherwise approved by the Zoning Administrator.”
  • Driveway accessLimited

    R-2 (SF) lots 45 feet wide or less inside Post Falls city limits.

    • Vehicular access must be alley- or rear-loaded for lots 45 feet or less.

    lot-width threshold: <= 45 ft (alley/rear-loaded access required)

    “R2 (SF) - Vehicular access to Lots of forty-five feet (45') or less must be alley/rear loaded.”
  • Permit feesVariable (with conditions)

    Manufactured-home installation permits inside Post Falls city limits.

    • The applicant must pay the city-council-resolution fee.
    • The applicant supplies the same site information required for a single-family dwelling building-permit applicant.
    “The permit applicant shall supply to the Building official the same site information required from an applicant seeking a Building permit for a single-family dwelling and shall pay a permit fee as set by resolution of the city council.”
  • Permit processPublished (with conditions)

    Building, planning, and engineering applications inside Post Falls city limits.

    • Use of the online Community Development Portal requires an account specific to the email address used to create it.
    “The City of Post Falls has an online portal where you can fill out and submit applications for the Building, Planning, and Engineering Departments. Customers can apply, upload plans, pay fees online, schedule inspections, and view inspection results.”

Rules another office applies inside Post Falls

Post Falls does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.

  • Off-grid sanitationLimited

    On-site sewage disposal inside Post Falls city limits where connection to public or municipal sewer is unavailable.

    • Panhandle Health District addresses sewage disposal for properties unable to connect to public or municipal sewer.
    • A septic permit is required for a new system or new location and site-specific conditions apply.
    “properties that are unable to connect to public or municipal sewer systems. Permits are required for all subsurface sewage disposal systems in Idaho.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Post Falls or Kootenai County directly.

  • Owner-builder exemption — Owner-built residences inside Post Falls city limits.
  • Certificate of occupancy — Residential occupancy inside Post Falls city limits.
  • Minimum dwelling size — Principal single-family dwellings inside Post Falls city limits.
  • Setbacks — Principal single-family dwellings inside Post Falls city limits.
  • Lot coverage — Residential lots inside Post Falls city limits.
7 more unanswered
  • Camping on your land
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Well permit
  • Agricultural exemption
  • Short-term rentals

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Unanswered questions are usually a sign that Post Falls publishes no rule on the point, not that none exists. Kootenai County’s page lists the county offices to call.

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