Published
Twenty items, sixteen copies, one sanitary restriction: what goes on a final plat.
The county will not record a partial document
Appendix L of the Fremont County Development Code sets out what a subdivision plat must look like. Its general drafting standards — scale, bearings, the closure standard of one part in 10,000 — govern every drawing. Division 2 is different and harder: it lists what a final plat must contain, item by numbered item, before the county will accept it. The section opens by anchoring the whole list in state law: every final plat must be prepared in compliance with Chapter 13, Title 50 of the Idaho Code, as amended, and include everything the county lists.
There are twenty numbered items. Some are lines on a drawing; most are certificates — signed, dated blocks in which people with real authority over the land say yes. A final plat is less a map than a stack of consents arranged around a map.
What the twenty items break into
Read as groups rather than a flat list, the items form four movements: the survey underneath, the land itself, the signatures on it, and the official machinery that finishes it.
| Group | What the plat must carry |
|---|---|
| The survey | The preparer's name, address and registration number or seal, with a certification that the plat is accurate and its monuments located or established; the point of beginning at a section or quarter-section corner; every existing monument found and every monument set, described |
| The land | Existing public ways and easements with bearings, distances and the county book and page numbers of the instruments that created them; the exterior boundaries with curve data; every lot and block with dimensions and curve data; the acreage of each lot and a table splitting total acreage between lots, streets and public or common parcels; floodplain, floodway and stream-corridor setback lines; street names and right-of-way widths |
| The signatures | The owner's certificate dedicating public ways, notarized; the certificate of consent from every mortgagor, lien holder and real-property interest — including mineral rights — notarized; certificates for the County Assessor and County Treasurer stating taxes on the land have been paid |
| The machinery | Approval certificates for the Commission and the Board; a statement of sanitary restriction as required by I.C. 50-1326; a certificate for the County Surveyor that all survey data is complete and correct; a certificate for the County Recorder to record it |
Two of these do work that surprises people. The book-and-page requirement means a plat is not self-contained: every easement it shows must be traceable to the recorded instrument that made it, by number. And the Assessor-Treasurer certificate means unpaid property tax on the parent parcel stops the plat — the county does not record a plat dividing land it holds a tax claim against, and the certificate is where that gets said out loud.
The consent that reaches below the surface
Of all the certificates, one has a reach the others do not. It is worth quoting exactly, because the list of who signs is longer than most sellers expect.
“A signed and dated certificate of consent in which all mortgagors, lien holders, and other parties with any real property interest, including the holders of mineral rights, in the property consent to its subdivision;”
— Fremont County Development Code, 2011 Edition (Ordinance 2011-04), Appendix L, section 1.03.130. Consolidated through Ordinance 2026-03. Retrieved 7 September 2026
Not just the owner. Every lender with a mortgage, every lien holder, and every holder of a severed interest — mineral rights explicitly among them — consents, signs and dates, and a notary acknowledges it. On ground where minerals were severed decades ago, that signature can be the long pole in the schedule: finding the current holder of an interest created before anyone living remembers is a title search, not a phone call. This is one of the quiet reasons dividing inherited ground takes longer than anyone budgets for.
The sanitary restriction
Item seventeen of twenty is a single quoted phrase: a statement of “sanitary restriction”, as required by I.C. 50-1326. The county code does not define it here — it cites the statute, and the statute governs what the phrase restricts. What the citation tells you is that the final plat is the document where the restriction lives: a recorded notice, on the face of the plat, tying the newly created lots to the state's sanitary limits. Three things follow from that placement:
- The restriction is recorded with the plat, so it travels with every lot the plat creates — a buyer's title search finds it in the recorder's index, not buried in a permit file.
- It is state law, not county policy: the county's item list only carries the statement onto the document, and Title 50 answers what it prohibits.
- It sits among the certificates rather than the survey items, which is a clue that it operates on the lots as legal objects, not on the drawing as geometry.
How many copies, and on what paper
Division 2 ends with the physical submission, and the numbers are not small. Official submission of the detailed Final Plan consists of:
- Three copies of the application for review of the final subdivision or project plan.
- Sixteen or more copies of the detailed Final Plan, the Final Plat and all supporting plans and information, so the county can distribute them for review.
- One reproducible copy of the complete detailed Final Plat, suitable for photographic reproduction and reduction.
The supporting material reaches beyond the county: the applicant must include copies of applications or notices made to federal and state agencies, and the code names its reviewers:
- The U.S. Army Corps of Engineers and the U.S. Department of Agriculture on the federal side.
- The Environmental Protection Agency and the Idaho Department of Environmental Quality on water and environment.
- The Idaho Transportation Department for anything touching state routes, and the Eastern Idaho Health District for anything touching septic and sanitary review.
Sixteen copies exists because review is distribution: the plat travels, and every reviewer holds the same drawing.
The paper itself is regulated too, by a general standard that applies to every plan submitted: sheets no larger than 30 by 42 inches, and no smaller than 17 by 22 inches. The recorder's book, the filing cabinets and the copying machines set the envelope; a plat outside it is a nice drawing.
What a landowner can usefully do with this list
- Use the four groups as a checklist for any draft your surveyor circulates — survey, land, signatures, machinery — and ask which certificates are still unsigned.
- Ask specifically whether any interest in the land is severed — minerals, an old mortgage, a lien — because each one adds a signature and a notary to the certificate of consent.
- Confirm property taxes on the parent parcel are current before submission, since the Assessor and Treasurer certificates state they have been paid.
- Expect the sanitary restriction statement on the face of the plat, citing I.C. 50-1326, and read the statute rather than a paraphrase when it matters.
- Budget for the copying, not just the drafting: sixteen or more copies of the final plan package plus one reproducible original.
- Keep the easement book-and-page numbers legible — they are what makes the plat verifiable decades later.
- Ask which outside reviewers the project will actually touch, because the agencies' applications and notices ride along with the copies the county distributes.
- Remember the item list sits on top of Idaho's Chapter 13, Title 50 platting statutes, so satisfying the county's list is necessary rather than sufficient.
The final plat is the last document in a chain that starts with a zoning questionnaire and runs through two governments' codebooks — and if the chain interests you, why two code lists govern one valley is the earlier link in it.
Common questions
What has to be on a final plat in Fremont County?
Twenty numbered items under Appendix L Division 2, prepared in compliance with Chapter 13, Title 50 of the Idaho Code: the survey and its monuments, boundaries, easements with book and page references, lot acreages, floodplain lines, the owner's and consent certificates, tax clearance, approval certificates, the sanitary restriction, and certificates for the County Surveyor and County Recorder.
Who has to sign the certificate of consent on a plat?
All mortgagors, lien holders and other parties with any real property interest in the property - including the holders of mineral rights - must sign and date the certificate of consent, and a notary must acknowledge it. Severed mineral interests count, however long ago they were created.
What is the sanitary restriction on a plat?
A statement on the face of the final plat, required by section 1.03.170 of Appendix L as I.C. 50-1326 requires. The county code cites the statute rather than restating it, so what the restriction prohibits is governed by Title 50 of the Idaho Code.
Why do the Assessor and Treasurer sign a final plat?
Appendix L requires a certificate signed by the County Assessor and County Treasurer stating that the plat properly describes the property being divided and that all real property taxes due on the land being subdivided have been paid. Unpaid taxes on the parent parcel stop the recording.
How many copies of the final plat must be submitted?
Three copies of the application, sixteen or more copies of the detailed Final Plan, Final Plat and supporting plans and information for distribution to reviewers, and one reproducible copy of the complete detailed Final Plat suitable for photographic reproduction and reduction.
What size paper must a plat be drawn on?
Sheets no larger than 30 by 42 inches and no smaller than 17 by 22 inches. The requirement sits in Appendix L's general drafting standards, which apply to all sketch, preliminary and final plans and plats.
Does the plat have to show floodplain lines?
Yes. The final plat must show the location of any floodplain and floodway boundaries as established by the Federal Emergency Management Agency, together with any stream corridor setback lines established by the county's ordinance.
What is the point of beginning on a plat survey?
Section 1.03.020 requires the subdivision survey's point of beginning to be a section or quarter-section corner - the plat's measurements are anchored to the public land survey system rather than to a private marker.
Are the county's items the whole requirement for a plat?
No. Appendix L Division 2 opens by requiring compliance with Chapter 13, Title 50 of the Idaho Code as amended, and its list is in addition to state law. A plat that satisfies every county item has satisfied the county's list, not everything that governs it.