Guides

Guides to building a custom home in Ashton

By Kjel Jones — independent custom-home researcher for Ashton and the Henry’s Fork corridor. Not a builder and not a general contractor. Licensed Idaho real estate agent, LPT Realty.

Published 2026-08-13 · every figure below was checked against its primary source on the date shown.

What is published so far

• Can a property owners' association put a lien on my lot in Fremont County?Answer: Yes — where common property is deeded to a property owners' association, Fremont County requires the covenants to provide for liens on the lot of any owner delinquent on association…Published 2026-11-12
• Cost per Square Foot to Build a House in IdahoThe closest benchmark: the U.S. Census Bureau's median contract price for new contractor-built single-family houses started in 2025 was $171.57 per square foot in the United States and $176.Published 2026-11-12
• Owner-builder or general contractor: which should build your Ashton home?Idaho exempts an owner building their own home from contractor registration — but the exemption ends if the home is built to sell during construction or within twelve months of completion…Published 2026-11-11
• Bathroom RemodelersA bathroom remodel in the Ashton area triggers permits before demolition. It opens a building-permit file with the city inside Ashton or the county outside it, plus state plumbing and…Published 2026-11-11
• What are homes listing for in Ashton, Idaho, as of October 2026?Homes listed for sale in the Ashton area carried a median asking price of $750,000 as of October 2026, up 7.9 percent from a year earlier, in Realtor.com's ZIP 83420 listing data. Per…Published 2026-11-11
• How close can trees be to a house in Fremont County?Answer: Under Fremont County's wildfire code: no woody growth within 5 feet of a structure, tree crowns within 10 feet pruned back to 10 feet of horizontal clearance, limbs below 6 feet…Published 2026-11-10
• Idaho contractor licensingQuick answer: Idaho does not issue a builder's license for general contractors — the state registers them instead, and licenses the trades. Electrical and plumbing work runs through state…Published 2026-11-10
• How much does it cost to subdivide land in Fremont County?The fixed county fees are knowable: a $495.00 General Class II permit — the class a subdivision application falls under — plus $195.00 county surveyor review per final phase and a $20.00 addPublished 2026-11-10
• When should you start planning a custom home build in Ashton?Work backward from the ground. Septic site evaluations need workable, unfrozen soil — a seasonal window on this corridor, not a year-round service — and Fremont County plan review takes apprPublished 2026-11-10
• How do I get a subdivision approved in Fremont County, Idaho?A subdivision is a Class II application — $495.00 under the county's adopted fee schedule — that can be disapproved solely for lacking a master plan of the applicant's entire contiguous holdPublished 2026-11-10
• What is the difference between a Class I and Class II permit in Ashton?Ashton's city permit forms run on two tracks: a one-page Class I permit for building, fence, sign, lot split, change of use, and home business items, and a Class II hearing-track application under the City of Ashton Development Code whose conditions bind future permits on the site. Both forms, side by side.Published 2026-10-26
• Does Ashton have city water and sewer? What the city's own plan says about the pipes under a buildYes to both: Ashton runs a central water system last updated in 2011 and a central sewage system treated at four aerated lagoons of about ten acres northwest of the city. Where pipes do not reach, water comes from private wells - and the city plan prints no rates at all.Published 2026-10-24
• Ashton planning and zoning, October 2026: the 35-to-50-foot height question, the 98 Maple Street rezone, and the comprehensive planThe City of Ashton Planning and Zoning Commission's October 2026 docket read from the city's own notices: a buildable-height amendment from 35 feet to 50 feet in the Highway Commercial district, a rezone of 98 Maple Street, the comprehensive plan hearing, and the one-year clock every Class II applicant is running against.Published 2026-10-23
• How many homes does Ashton build a year? The city's own permit record, 2020-2024Ashton's draft comprehensive plan counts every city building permit from 2020 through 2024: six new homes in five years, 10 to 13 total permits a year, decks and remodels far ahead of new construction, a $171,100 median house valuation, and what the counts say about finding a builder in a town that builds so little.Published 2026-10-22
• Ashton's special council meeting, October 21, 2026: sidewalks, a water line, and two action itemsAshton's city council convenes a special meeting at 6:00 p.m. on Wednesday, October 21, 2026, at 714 Main Street, with two action items on a one-page agenda: a Sidewalk Project Discussion and a Water Line Discussion. What the posted record says, how public participation works, and what it does not.Published 2026-10-21
• Fremont County's manufactured dwelling placement permit: $78.75 or $252.00, the Idaho-licensed installer rule, and the 75-foot water setbackThe county's placement application (retrieved 14 August 2026) prices single-wide placement at $78.75, double-wide or larger at $252.00, and the optional intent-to-declare-real-property line at $71.50. It can be obtained only by the homeowner or an Idaho-licensed installer, asks for the septic permit number and a PSF snow load, and prints a 75-foot setback from water.Published 2026-10-20
• Truss drawings and the snow-load number you hand the supplier: ASD versus LRFD, the 0.7 factor, and what Fremont County stampsSBCA (March 13, 2025): ground snow loads are the starting point, the IBC converts them to roof loads with a 0.7 factor, and an ASD load entered as LRFD produces a dangerous unconservative design. What to hand the supplier, what the truss design drawings must state, and Fremont County's 70lb/ft engineer rule.Published 2026-10-19
• Fall River Electric's line extension policy GP 402: the ten-year agreement, the $150-or-$250 estimate fee, and proportional share explainedFall River's General Policy 402 (revised 04/25/2022) requires a ten-year Agreement for Electric Service, defines a $150 engineering fee the current web page prices at $250, and sets the $500 secondary base, $1,500 temporary service, proportional share with 3% annual depreciation, and the $100 reconciliation threshold.Published 2026-10-17
• Cold weather concreting under ACI 306R-16: the 40°F line, the 500 psi threshold, and the day counts that decide a winter pourACI 306R-16 defines cold weather concreting as any time air temperature falls to, or is expected to fall below, 40°F (4°C) during the protection period. The 500 psi rule, Table 7.2 protection periods, Table 8.8 strength days at 50°F, the field-cured cylinder ban, and the heater dusting trap.Published 2026-10-16
• New home warranty in Idaho: no statute requires one - what actually stands behind an Ashton buildIdaho has no new-home warranty statute - nothing in the registration, trades, or lien chapters creates one. What stands behind a build instead: the warranty written into the contract, trades licenses that are permissions rather than promises ($125 electrical contractor, $147 plumbing contractor per the boards' fee pages), and the Idaho Consumer Protection Act, where misrepresenting standard or quality is unlawful and the attorney general can seek up to $5,000 per violation.Published 2026-10-15
• Radon in Ashton, Idaho: 34 of 75 local tests over the EPA line, why the rhyolite under the valley produces it, and what testing costsAshton's ZIP 83420 test record - 75 tests, a 6.1 pCi/L average, 34 results over EPA's 4.0 pCi/L guideline - against Idaho's 2-in-5 elevated rate. The 2025 EPA/USGS geology behind local radon, the cigarette-equivalence and lifetime risk tables, how to get a free or cheap test kit in the upper valley, mitigation costs ($300-$600 DIY, $1,500-$3,500 professional), and the state contacts.Published 2026-10-14
• Who inspects your wiring and pipes in Ashton: the state inspectors, their days, and the fees for wasted tripsIdaho's state inspectors - not Fremont County - examine electrical, plumbing and HVAC work. The DOPL coverage list dated August 5, 2026 names Anthony Parker (electrical, weekdays, 208-351-6908), Cade Clark (plumbing, Tue/Thu, 208-258-0046) and Greg Hokanson (HVAC, Tue/Thu, 208-221-2888) for Ashton and Chester. Requested inspections cost $65, virtual ones $45, and not-ready work bills $65.Published 2026-10-13
• Radon-resistant construction in Ashton: the five features, the $300 to $500 window, and why nothing in the permit process requires themEPA's five radon-resistant features - gravel layer, plastic sheeting, a labeled vent pipe through the roof, polyurethane sealing, an attic junction box - cost $300 to $500 during construction per Idaho's health department. Idaho does not require them outside cities that adopt the code appendix, so buyers must ask. More than 1.5 million homes have been built this way since 1990.Published 2026-10-12
• Sales tax on new construction in Idaho: why your builder's invoice has no tax line, and the rule that lets you refuse oneIdaho treats builders as the consumers of all materials, so tax is paid at cost and embedded in the price - never added to your contract. The Tax Commission's own worked bills ($1,060 materials line, $4,060 total), the sentence that lets customers refuse an improper tax line, owner-provided-materials liability, subcontractor rules, spec houses, and the crushed-value rule for gravel.Published 2026-10-10
• Do homeowners need a plumbing permit in Idaho? The statewide rule, the license exemption that is not a permit exemption, and the feesIdaho Code 54-2620 requires a statewide plumbing permit before any plumbing work starts - and IDAPA 24.39.20 says homeowners doing their own work must still buy one. The one- and two-family fee ladder ($130 to $325 plus $65 per additional 1,000 square feet), the three inspection tags (ground work, rough-in, final), the Notice of Correction reinspection cost, and the farm-building and $500 minor-work carve-outs.Published 2026-10-09
• Fall River Electric rates for a corridor build: the $39 access fee, $2.75 per kW demand charge, and the kWh tiers that set your monthly billThe complete May 2025 Fall River Electric rate card for Ashton-area homes - $39 monthly residential access fee, $2.75 per kW demand, 5.75 cents per kWh for the first 2,000 kWh and 8.07 cents above - plus what the 3.9% average increase did to the $123 monthly bill, how the 15-minute demand charge works, the $10 Idle Service trap, and where the co-op's power comes from.Published 2026-10-08
• Idaho's state electrical permit: the fees by home size, the rule against covering uninspected wiring, and the statute that gates your powerYour Fremont County building permit does not cover the wiring - Idaho's Electrical Board issues a separate state permit under Idaho Code 54-1005 and IDAPA 24.39.10. The full fee ladder for new one- and two-family dwellings ($130 to $325 plus $65 per additional 1,000 square feet), the purchase-before-work rule, the bar on concealing wiring before inspection, the 365-day permit life, and the statute that stops your power supplier from energizing an uninspected installation.Published 2026-10-07
• Withholding from your builder in Idaho: the filed-claim trigger, the judgment setoff, and the recover-back right (Idaho Code 45-511)Once a subcontractor or supplier files a lien claim on the job, Idaho Code section 45-511 lets the owner withhold that amount from the general contractor during the action, deduct the judgment plus costs from anything due, and recover back any excess already paid - while capping the contractor's own recovery at what remains after filed claims beneath him. The plain truth that no filing means no statutory right to withhold, and why Idaho's setoff rule stands in for a trust-fund statute it does not have.Published 2026-10-06
• Who gets paid first in an Idaho lien foreclosure: the five-class ranking every judgment must declareIdaho Code section 45-512 makes the foreclosing court declare a fixed rank: laborers, then materialmen including equipment and fixtures lessors, then subcontractors, then the original contractor, then engineers and surveyors - pro rata within a class when proceeds run short, equal footing without regard to filing date, and the whole class preferred to later mortgages under section 45-506. Joinder, attorney's fees as costs, the surviving personal debt, and why homestead sales rarely happen.Published 2026-10-05
• Bonding off a construction lien in Idaho: the 1-1/2x surety bond that releases the record without paying the claim firstIdaho Code sections 45-518 through 45-524 let an owner release a recorded mechanic's lien without paying first: a surety bond at 1-1/2 times the claim from an Idaho-authorized surety, a petition in the district court where the property sits, a hearing 5 to 10 days out, service at least 2 days before, and an order that releases the lien of record with no appeal. The claimant's 2-day exception window, the 7% interest fight that follows, and when bonding off makes sense.Published 2026-10-03
• Check your builder's Idaho registration: the free DOPL public search, the 60-day number rule, and the traps in a valid-looking registrationThe free Idaho Contractors Board public search at dopl.idaho.gov/con/ - plus the statutory rules that make it meaningful: the registration number must be prominently displayed on contracts, permits, advertising, letterheads, purchase orders and subcontracts within 60 days of issue; registrations run 24 months to 5 years under the statute while the board transitions to biennial registration as of October 14, 2025; fees effective July 1, 2026; and the inactive, transferred, and lapsed traps.Published 2026-10-02
• How to complain about an Idaho contractor: the DOPL route, the $1,000 penalty menu, and what the board can and cannot doFiling a complaint against an Idaho contractor: the written complaint the Contractors Board must investigate, the DOPL Online Services portal, discipline from informal reprimand to suspension or revocation plus a $1,000 civil penalty, $50 per day for unreturned certificates, the misdemeanor for unregistered work, and the plain truth that money comes from courts, not the board.Published 2026-10-01
• Idaho's real contract paperwork rules: no writing requirement, no blanks to sign, your copy at signature, $1,000 minimum remedyVerified: no Idaho statute requires a home construction contract to be in writing. What the Idaho Consumer Protection Act does outlaw - blank spaces signed over, no legible copy at the moment of signature, false license or affiliation claims, unneeded repairs - plus the remedies: a voidable agreement, actual damages or $1,000 whichever is greater, mandatory attorney's fees for a prevailing plaintiff, and board discipline under section 54-5215(2)(b).Published 2026-09-30
• How a construction lien works in Idaho: 90 days to file, 5 days to tell you, 6 months to sueThe mechanics' lien calendar for homeowners: subs and suppliers you never hired can lien the improvement, the claim files within 90 days and must be served on you within five business days, enforcement has six months, the judgment lasts ten years - and Idaho's counterweights for contracts over $2,000: waivers, disclosures, and the $500 subcontractor list before final payment.Published 2026-09-29
• Idaho's contractor registration rule: sworn application, $300,000 insurance, and a number on the face of your permitSince January 1, 2006 it has been unlawful to hold yourself out as a contractor in Idaho without registration: application under oath, workers' comp proof, a $300,000 single-limit liability policy including completed operations, and the registration number conspicuously entered on every building permit. The exemptions, the twelve-month owner-builder trap, and the lien rights an unregistered builder conclusively waives.Published 2026-09-28
• The three transient rental tiers in Fremont County: 15 occupants, 30 occupants, and the commercial cliffFremont County's Appendix I transient rental rules in plain terms: 30 consecutive days defines the use; 15 or fewer overnight occupants takes a Class I permit, 16 to 30 a Class II conditional use, more than 30 is commercial zoning territory. Plus the 150 square feet per occupant cap, the local agent whose number must be posted for neighbours, the roadway-access rule amended in 2016, and the clause that fails any rental that misses a single requirement.Published 2026-09-26
• Keeping animals on a residential lot in Fremont County: two horses or ten sheep per acre, and the 300-foot rule that decides if your land countsFremont County code section 5.23 in plain terms: residential means platted or within 300 feet of a neighbour's house; livestock caps at two horses, pigs or cows per acre, ten llamas, sheep or goats counting offspring until weaned; one-acre minimum for livestock; fowl scale proportionally below it; seven days of pack animals in hunting season; and the 250-animal cliff into confined-feeding rules.Published 2026-09-25
• Why you can't look up Ashton's flood zone online - and what your lender does insteadFEMA's flood map layer holds zero digitized panels for all of Fremont County, while the county has been in the National Flood Insurance Program since 1977 - so an Ashton address search returns nothing, and lenders fall back to paper-era records. What the blank screen means, what it never means, and the Letter of Map Amendment route when a determination is wrong.Published 2026-09-24
• The City of Ashton excavation permit: $100 fees, Dig Line notice, and the ten-day repair clockAshton's excavation permit governs any dig in the public right-of-way: a $100 hard-surface fee, Dig Line notice two business days ahead, Class A backfill, a ten-day repair clock, and a 180-day fee holdback. Read condition by condition.Published 2026-09-23
• Ashton's snow load: the city's form prints 70 lbs, the county ordinance says 90 PSFTwo official documents disagree about Ashton's snow load: the city's permit form prints 70 lbs; the county ordinance assigns 90 PSF; the U of I study says 103. What to ask before a roof is designed.Published 2026-09-22
• The City of Ashton's own building-permit application, walked through field by fieldThe city's one-page building-permit application: eighteen checkboxes, the Contractor # field, the legal lot-block-sub line, a square-footage grid, and the snow-load sentence the form itself prints. Fees are filled in by the office, not printed.Published 2026-09-21
• Ashton publishes its own code: seventeen titles, current through Ord. 503-23 (passed April 12, 2023)Ashton's city code runs seventeen titles — five of them reserved — in a free online library, current through Ord. 503-23, passed 4-12-2023. What the table of contents proves, and what it cannot tell you without the city's viewer.Published 2026-09-16
• What seismic design category is Ashton? D — and the free USGS query that proves itA one-question page with an official answer: the USGS design service returns Seismic Design Category D for Ashton's coordinates, Site Class D, Risk Category II — SDS 0.458 g, SD1 0.264 g, verified 11 September 2026.Published 2026-09-15
• The 48-business-hour inspection clock and the 10 percent refund: Idaho's 2025 building-code change, read at AshtonIdaho Code 39-4118, added by the 2025 legislature: 48 business hours to answer an inspection request, a written reason within three days, and two refund routes. What it changes on a corridor permit file.Published 2026-09-14
• The master plan rule: the county judges a subdivision against every acre the developer owns — and writes itself into your covenantsA subdivision can be denied solely for lacking a master plan of the owner's entire contiguous holdings. County-required covenants can't change without the Board's written consent, and a POA's covenants must carry nine minimums — liens included.Published 2026-09-12
• The Fremont County Agricultural Protection Area file: five contiguous acres, $25.00, all four pages — and the neighbor protections written into itThe county's own APA packet: seven tests the land must pass, seven more the county weighs, the Section 3 evidence checklist with its city and highway-district statements — and the attestation that a designation cannot limit any other property.Published 2026-09-11
• What Fall River asks for before crews can schedule your powerThe co-op's own checklist: a site plan that must show any future buildings, an approved plat in subdivisions, load and voltage, fees paid in advance — and the meter's location is the co-op's decision, not yours. Temporary power has its own permit.Published 2026-09-10
• Underground power, easements drawn on the plat, and capacity in writing — Fremont County's subdivision utility rulesThe code made the developer prove utilities before your lot existed: easements drawn on the final plat, written certification of capacity from every utility, underground power, services in before the road surface. The plat you inherit is the record.Published 2026-09-09
• Fremont County's last adopted permit fee schedule, in full: $55.00 a square foot, $19.00 to $4,487.00, dated 2005Ordinance 2005-02 adopts the county's only published building-fee amounts: $55.00 a square foot to value a house, a ladder from $19.00 to $4,487.00, plan review at 30 percent, a $42.00 hour. Printed as adopted, dated 2005 — nothing since confirms it.Published 2026-09-08
• A road does not stop your neighbour being 'adjacent' — and four other words the county has redefinedOrdinary words carry specific meanings here. Adjacent reaches across a road. Accessory needs a principal use already on the lot. And a significant impact can exist even where the community approves.Published 2026-09-07
• A family burial ground is permitted here — but the deed has to be recorded before the first intermentThe county calls private family burial grounds a public benefit. The whole mechanism is a description recorded on the deed before any interment, plus a duty to disclose it when the land is sold.Published 2026-09-05
• A household wind turbine is a Class I permit in every district — unless you are within two miles of a scenic bywayA small wind system of up to two towers is permitted in all zoning districts, but no wind system is allowed within two miles of a scenic highway corridor, and large systems are prohibited countywide. After that the constraint is geometry: the setback equals the machine's total height from every property line.Published 2026-09-04
• 60 decibels by day, 50 by night — and construction noise stops at 10 p.m. and cannot start before 7 a.m.The county measures noise at your neighbour's property line, not yours. Construction may exceed the limits only between 7 a.m. and 10 p.m., and farm machinery is excluded from the standard entirely.Published 2026-09-03
• A buffer is arithmetic: four trees per hundred feet, a height charge over 25 feet, and 30 percent back for plantingBuffer width is calculated, not chosen. Four major trees per hundred feet is the baseline, height over 25 feet widens it, and berms and planting earn up to 30 percent back — never below ten feet.Published 2026-09-02
• Phasing a subdivision: the guarantee covers a year's maintenance, and a missed schedule voids your vested rightsYou can sell lots before the improvements are built. The guarantee covers completion, repair and one year's maintenance — and missing the schedule without re-negotiating inside 90 days voids the agreement.Published 2026-09-01
• One house on any lot. A second one needs 1.5 acres and a good deal more.One primary dwelling is allowed on a lot of any size, subject to the health district. A second needs 1.5 acres, perpetual common ownership, and zoning that permits it.Published 2026-08-29
• Seventy feet: the county's wildfire requirement, and the plan that goes with the platThe code requires seventy feet of defensible space around a dwelling, no woody growth within five feet of a structure, and limbs pruned below six feet. New construction files a wildfire plan with the plat.Published 2026-08-28
• Building in the Floodplain Overlay: where clearing and grading suddenly need a permitInside the Floodplain Overlay, any activity that may affect flood flows needs a permit - including clearing, grading and fill that are exempt elsewhere. Plus the five-acre threshold for base flood elevation data.Published 2026-08-27
• There is no published snow load for Chester or Marysville — and the ordinance won't tell you eitherThe University of Idaho study has stations at Ashton, Warm River and Drummond, and none at Chester or Marysville. The ordinance assigns by district and defines no boundary in text. Two different gaps, and neither fills the other.Published 2026-08-26
• Fremont County does not publish what a building permit costs — and it has two Section 4sFive documents on the county Building page, none with an amount on it, and a 2026-revised checklist stating no figures at all. The only adopted schedule is from 2005, in the second of two consecutive sections both numbered 4.Published 2026-08-25
• Getting power to a Henry's Fork lot: the co-op charges $250 just to tell you what it costsThe fee is charged whether or not you are ready to build, so pricing two lots is a real line item. Then membership, the easement that is a condition of service, and aid to construction — the number that actually varies by thousands.Published 2026-08-24
• What "custom" actually means here: plan sets, allowances, and the exclusions listThe county settles part of it — an engineered, stamped set with truss designs is a submission requirement on the corridor. The rest is the allowance schedule and the exclusions list, which is where two bids stop being comparable.Published 2026-08-22
• The energy code on an Ashton build: two ways to comply, and the sheet the county usesREScheck trades components against each other; the county's prescriptive path does not. Its Climate Zone 6 values reproduced in full — plus the two things that sheet does not tell you, including any window figure at all.Published 2026-08-21
• Who pulls the building permit, owner or builder — and what changes either wayThe county wants the landowner's signature. A builder can pull it instead, but only on a signed permission letter the county publishes as a form. What each route changes about notice, corrections, and who holds the file if you part ways mid-build.Published 2026-08-20
• What actually differs from lot to lot on the Ashton corridor?Frost depth and the adopted codes are fixed countywide. The snow-load district is not — it can swing 25 PSF between lots a few miles apart, and the map that settles it is a scanned image.Published 2026-08-19
• The Fremont County snow-load district almost nobody names: North Fork Highlands, 115 PSFThe county ordinance defines a district above Ashton that no builder site and no cost calculator mentions. If your lot falls in it, the design load jumps 25 PSF over the Ashton District figure.Published 2026-08-18
• Log, timber frame and SIP homes in Ashton — who actually builds them hereThis is the corridor’s deepest lane and it is genuinely local: two firms have run log and panel work here for decades. What separates the three systems on an Ashton lot, and what each does to your permit file.Published 2026-08-17
• How deep do footings have to go in Fremont County? Thirty-two inches.The county sets one minimum frost depth and it applies to the whole county, not just the cold end. What 32 inches means for your foundation quote, your excavation bid, and pouring late in the year.Published 2026-08-15
• Ashton’s snow load is 90 PSF — the state’s own study says 103. Which number holds up your roof?Fremont County Ordinance 2005-02 sets one figure for the whole Ashton District. The University of Idaho’s 2015 reference gives Ashton 103 psf, Warm River 108, Drummond 114. What your engineer designs to, and the question to ask before plans are drawn.Published 2026-08-13
• Well and septic on an Ashton acreage lot — what to confirm before you buyA corridor lot with no water and no approved drainfield is a lot you cannot build on this year. The diligence order that keeps a purchase from stalling, written at Ashton and Drummond addresses.Published 2026-08-13
• The Fremont County permit path for a new house in Ashton, step by stepWhich county form starts the file, what the building department wants attached, where the snow-load certification enters, and the 2026-revised letter most applicants have never seen. Every document ID verified live.Published 2026-08-13
• What does it cost to build a custom home in Ashton, Idaho?No builder on the corridor publishes a price, and there are honest reasons — snow-load framing, well depth, septic design, and a short season. What is actually published, what drives the spread, and how to make three bids comparable.Published 2026-08-13

The two numbers most of these guides come back to

Almost every question about building here lands on the same county ordinance. It is worth reading once in its own words:

“Section 3. Ground Snow Load: The ground snow load shall be … 115 PSF. for the North Fork Highlands district. 90 PSF. for the Ashton District…”

“Section 4. Minimum Frost Depth for Footings: The minimum frost depth for footings shall be 32 inches.”

— Fremont County Ordinance No. 2005-02, Sections 3 and 4 (county-published PDF, retrieved 13 August 2026)

• 90 PSF ground snow load in the Ashton District, and 115 PSF in the North Fork Highlands district above it — two of the four districts the ordinance defines.
• 32 inches minimum frost depth for footings, applied countywide.
• 2018 IRC, IBC and IECC are the adopted codes, so energy-code compliance is part of the permit file, not an afterthought.
• The snow load varies by district; the frost depth does not. One number depends on where your lot sits and the other applies across the whole county.

How a guide gets written

1. A real question arrives from someone actually building, buying or subdividing here.
2. The primary document is read in full — the county ordinance, the county form, the state study — never a search-result summary of it.
3. Figures are quoted with their source and retrieval date, so the claim can be checked and a stale one is obvious.
4. The page says where the answer runs out and names the office or licensed professional who owns the rest of it.

Related reading on this site

• The builder table — the six firms working out of Ashton and the corridor, with registration numbers
• Who writes this — the researcher behind the site, and what he is not
• How this site is paid — the business model in plain language, including what it costs you
• Reviews and references — why there are no testimonials here yet, and what to ask for instead

Common questions

What do these guides cover?

The things a Fremont County building file actually turns on: the Ashton District snow load, the 32-inch frost depth, the county permit sequence, well and septic diligence on acreage, what drives a custom-home price here, and which builders run log, timber and structural insulated panel work.

How often is a new guide published?

Most weekdays, never on a Sunday. Longer pieces land Monday, Wednesday and Friday; shorter single-question answers fill the days between. Each page carries the date it was published and the date its figures were last checked.

Are the numbers in these guides verified?

Yes, and against the original document rather than a summary of it. The 90 PSF and 32-inch figures come from the text of Fremont County Ordinance No. 2005-02 itself. Where a county form is cited, it was fetched on the date shown to confirm it was still live.

Why do some links to county documents break?

Fremont County renumbers its DocumentCenter files from time to time — the building permit application has already moved once. Every county link on this site is re-checked when a page is updated, and the document table on the home page is the single place they are maintained.

Do the guides cover Island Park or St. Anthony?

No. This site is Ashton, Chester, Drummond, Warm River and the Henry's Fork corridor between them. Other parts of Fremont County sit in different snow-load districts with materially different design figures, and mixing them is how people end up quoting the wrong number to an engineer.

Can I ask for a guide on something specific?

Yes, and those make the best pages. If you are working through a question about a corridor lot and cannot find a straight answer anywhere, send it over — the answer becomes a guide if it is likely to help the next person too.

Is any of this legal or engineering advice?

No. It is research, sourced and dated so you can check it. Design figures belong to a licensed Idaho structural engineer, permit decisions belong to the county building department, and the construction belongs to the builder you hire.

Does a builder pay to be featured in a guide?

No. No builder has paid for placement, wording or omission in anything published here, and the table of local firms is compiled from public records. How the site is funded is set out in full on its own page.