This is PermitBase’s published record for Silverthorne as of 2026-07-06. It has since been superseded — see the current record. A historical record reflects what PermitBase had verified at that time; it may not capture a real-world change the jurisdiction had made but PermitBase had not yet verified, and it includes any errors we later corrected. Snapshots are never edited retroactively.
Silverthorne building permits
VerifiedSilverthorne, Colorado — as published 2026-07-06.
Verified 2026-07-06 · Source
Codes adopted
Permit types & fees
New Residential Construction Building Permit (SFR Attached and Detached)
VerifiedRequired for new single-family residential construction (attached and detached) in Silverthorne. The Town's Planning, Engineering, and Water/Sewer Departments review for Town Code compliance while the Summit County Building Department conducts the Building Code plan review and performs inspections. Reviewed under the 2018 IBC/IRC package as locally amended.
Verified 2026-07-06 · Source
Requirements
- Site plan with topographical information; building height table per Town Code definition of building height
- Water and sewer service line details shown on site plans and mechanical plans
- Construction management plan; erosion control and grading plan
- Landscape plan (Town Code Section 4-6-14) including revegetation information and designated snow storage area(s)
- Tree conservation plan (Town Code Article VIII, Environmental Guidelines)
- Exterior lighting location on architectural elevations, plus exterior lighting spec sheet
- Architectural plans (floor plans, elevations, materials); elevations with USGS ties for height calculations
- Structural drawings stamped by a Colorado-licensed architect/engineer, including design loads, code versions, and project type; foundation plans; framing plans
- Soils report; HOA approval if applicable; warranty deed if applicable for new ownership
- Summit Fire & EMS fire mitigation permit required for all new construction; life-safety/sprinkler permit required for Eagles Nest Golf Course Filings 1-5 or homes over 6,000 SF
- Plan Review: Town of Silverthorne Planning, Engineering, and Water and Sewer departments review per Town Code; Summit County Building Department conducts the Building Code plan review
Required documents
- RequiredBuilding Permit Application (SmartGov Portal)Submitted online via the Town's SmartGov Public Portal
- RequiredConstruction Drawings and Structural PlansStamped by a Colorado-licensed architect/engineer, including foundation and framing plans
- RequiredConstruction Management PlanSediment/erosion-control BMPs, required with every building permit
- OptionalSoils ReportAdditional submittal document
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit Fee — valuation $1 to $500 | $23.50 | Town of Silverthorne Permit Fees page, 'How to Calculate Building Permit Fees' |
| Building Permit Fee — valuation $100,001 to $500,000 | $993.75 for the first $100,000, plus $5.60 per additional $1,000 or fraction thereof | — |
| Building Permit Fee — valuation $1,000,001 and up | $5,608.75 for the first $1,000,000, plus $3.75 per additional $1,000 or fraction thereof | — |
| Plan Review Fee | 65% of the Building Permit Fee | Due at submittal |
| Excise Tax | $2.00 per square foot (living space, unfinished space, and garage) | New residential construction only; paid at time of submittal |
| Stormwater System Development Charge | $0.53 per square foot of impermeable surface | New building permits only; due before permit issuance |
| Impact Fee | Based on building square footage (exact rate not published on reviewed pages) | Due and payable prior to permit issuance; confirm exact rate with the Building Division |
| Water and Sewer Tap Fees (EQRs) and Water Meter Fee | Per Town Code Sec. 3-2-1 use classification schedule | Due before permit issuance for new construction |
Residential Addition / Remodel Building Permit
VerifiedCovers additions and interior/structural remodels to existing single-family residences in Silverthorne. Additions follow largely the same submittal package as new construction (minus excise tax); remodels have a lighter submittal package. Both route through Town Code review plus Summit County Building Code plan review.
Verified 2026-07-06 · Source
Requirements
- Residential Additions: site plan with topographical info, building height table, water/sewer service line details, construction management plan, erosion control/grading plan, landscape plan, tree conservation plan, exterior lighting location, architectural plans, elevations with USGS ties, stamped structural drawings, foundation and framing plans, soils report
- Residential Remodels: overall floor plans showing existing and proposed scope of work, scope of work list, stamped structural plans by a licensed Colorado engineer (lighter submittal than additions/new construction)
- Summit Fire & EMS fire mitigation permit required for additions (not listed as required for remodels specifically)
- Plan Review: Town of Silverthorne Planning and Engineering Departments review per Town Code; Summit County Building Department conducts Building Code plan review
- Water and sewer tap fees (EQRs) required for additions that add bedrooms/bathrooms
Required documents
- RequiredBuilding Permit Application (SmartGov Portal)Submitted online
- RequiredScope of Work listRequired for remodels
- RequiredStamped Structural PlansBy a licensed Colorado engineer, for remodels affecting structure; full stamped structural drawings for additions
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit Fee (same valuation table as new construction) | $23.50 minimum, scaling per the valuation tiers in the Town's fee table | Town of Silverthorne Permit Fees page |
| Plan Review Fee | 65% of the Building Permit Fee | — |
| Impact Fee (additions only) | Based on added square footage | Not applicable to remodels that do not add square footage |
| Water and Sewer Tap Fees (EQRs) | Per Town Code Sec. 3-2-1 | Required for additions/remodels that add bedrooms or bathrooms |
Electrical Permit
VerifiedRequired for electrical installation, alteration, or repair on any project in Silverthorne. Unlike every other trade permit in this jurisdiction, electrical permits are issued ENTIRELY by the Summit County Building Department, not the Town — the Town does not intake, fee, or issue electrical permits at all. Governed by the 2023 NFPA 70 National Electrical Code as adopted.
Verified 2026-07-06 · Source
Requirements
- Electrical permits must be submitted directly to the Summit County Building Department (0037 Peak One Drive / 37 S.C.R. 1005, Frisco, CO), not to the Town of Silverthorne — per the Town's own Outside Agency Permits and Building Codes & Construction Resources pages
- Governed by the 2023 NFPA 70 National Electrical Code, adopted via Town Ordinance 2023-10 (the Town's own page attributes this specific code adoption to the Summit County Building Department)
- Residential electrical permit fees are based on total building area (square feet) plus total number of dwelling units in the building
- All electrical permit fees are assessed by and paid to the Summit County Building Department, not the Town of Silverthorne
Required documents
- RequiredElectrical Permit Application (Summit County Building Department)Submitted directly to Summit County, not through the Town's SmartGov portal
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Electrical Permit Fee (residential) | Based on total building area (sq ft) plus number of dwelling units | Assessed by and paid to Summit County Building Department, (970) 668-3170 — not published on the Town's fee schedule since the Town does not issue this permit |
Residential Plumbing Permit
VerifiedRequired for plumbing installation, alteration, or repair on residential projects in Silverthorne. Issued by the Town of Silverthorne Building Division (not Summit County) for single-family residential work; commercial plumbing requires a separate process with Summit County plan review.
Verified 2026-07-06 · Source
Requirements
- Residential plumbing permits are issued by the Town of Silverthorne Building Department (601 Center Circle), not Summit County
- No additional submittal requirements for a standard residential plumbing and mechanical permit, per the Town's Permit Process page
- All manufacturer specifications must be printed and available on-site for inspection
- Typically no plan review fee for a single-family house; fee is based on the assigned value of the work
- Commercial plumbing work is a SEPARATE permit type requiring a Colorado-licensed architect/engineer's stamp, a separate fee, and Summit County plan review
Required documents
- RequiredResidential Plumbing and Mechanical Permit Application (SmartGov Portal)Submitted to the Town of Silverthorne
- RequiredManufacturer SpecificationsMust be printed and available on-site for inspection
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Plumbing and Mechanical Fee | 10% of job valuation, calculated using a 0.75 multiplier | Town of Silverthorne 'How to Calculate Building Permit Fees' section; the Town directs applicants to call (970) 262-7360 for an accurate fee rather than self-calculating |
Residential Mechanical / HVAC Permit
VerifiedRequired for heating, cooling, and ventilation equipment installation or replacement on residential projects in Silverthorne. Issued by the Town of Silverthorne (bundled with plumbing under a single 'Plumbing and Mechanical' permit process for residential work); commercial mechanical work requires Summit County plan review.
Verified 2026-07-06 · Source
Requirements
- Residential mechanical permits are issued by the Town of Silverthorne Building Department, bundled procedurally with plumbing under 'Residential Plumbing and Mechanical Permits'
- No additional submittal requirements beyond the standard application for a residential permit
- All manufacturer specifications (furnace, boiler, etc.) must be printed and available on-site for inspection
- Commercial mechanical work requires an engineer's stamp, a separate fee, and Summit County plan review
Required documents
- RequiredResidential Plumbing and Mechanical Permit Application (SmartGov Portal)Submitted to the Town of Silverthorne
- RequiredManufacturer SpecificationsMust be printed and available on-site for inspection
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Plumbing and Mechanical Fee | 10% of job valuation, calculated using a 0.75 multiplier | Same formula as the plumbing permit; Town directs applicants to call (970) 262-7360 for an accurate fee |
Accessory Dwelling Unit / Single Apartment Building Permit
VerifiedRequired for construction of an accessory dwelling unit (ADU) / single apartment in Silverthorne, whether as an attached addition, a detached structure, or a remodel of an existing home. Each ADU sub-type has its own dedicated submittal path on the Town's Permit Process page, all routed through Town Code review plus Summit County Building Code plan review.
Verified 2026-07-06 · Source
Requirements
- Attached Addition ADU: site plan with existing/proposed structures, construction management plan, erosion control/grading plan, overall floor plans (existing and proposed), stamped structurals by a licensed Colorado engineer, architectural elevations
- Detached Structure ADU: site plan showing existing/proposed structures to-scale, overall floor plans, stamped structurals by a licensed Colorado engineer, architectural elevations
- Remodel-of-Existing-Home ADU: site plan with ADU footprint outlined to scale, stamped overall floor plans showing existing/proposed scope of work, stamped structurals, architectural elevations if exterior is modified
- HOA approval if applicable; warranty deed if applicable for new ownership; exterior lighting spec sheet (attached/detached types); outside agency approvals prior to issuance
- Summit Fire & EMS fire mitigation permit for all new construction, additions, and decks; life-safety/sprinkler permit required for Eagles Nest Golf Course Filings 1-5 or homes over 6,000 SF
- Plan Review: Town of Silverthorne Planning (and Engineering, for attached/detached types) Department(s) review per Town Code; Summit County Building Department conducts Building Code plan review
Required documents
- RequiredADU Building Permit Application (SmartGov Portal)Separate online application links exist for each of the three ADU sub-types (attached addition, detached structure, remodel of existing home)
- RequiredStamped Structural PlansBy a licensed Colorado engineer, required for all three ADU sub-types
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Plan Review Fee | 65% of the Building Permit Fee | Due at submittal for all three ADU sub-types |
| Building Permit Fee (same valuation table as new construction) | $23.50 minimum, scaling per valuation tiers | — |
| Water and Sewer Tap Fees / Impact Fees / Stormwater System Development Fee | Applicable for attached-addition and detached-structure ADUs (new construction); the remodel-of-existing-home ADU type lists only permit fees and water/sewer tap fees due before issuance, no stormwater/impact fee listed | Per the Town's Permit Process page, fee scope differs by ADU sub-type |
Demolition Permit
VerifiedRequired for demolition of a structure in Silverthorne. Submittal is lighter than most other permit types on the Town's Permit Process page, requiring to-scale demo plans and landowner authorization.
Verified 2026-07-06 · Source
Requirements
- To-scale demo plans
- Landowner authorization letter
- Applicants must read and understand the Demo Permit Acknowledgements document prior to applying online
- No detailed multi-step review process (application submittal / outside agency / issuance / inspections breakdown) is published for demo permits the way it is for other permit types on the Town's Permit Process page — the page lists only the application requirements
Required documents
- RequiredDemo Permit Application (SmartGov Portal)Submitted online
- RequiredTo-Scale Demo PlansShowing the scope of demolition
- RequiredLandowner Authorization Letter
- RequiredDemo Permit AcknowledgementsMust be read and understood prior to applying
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit Fee (valuation-based, same table as other permit types) | $23.50 minimum, scaling per valuation tiers | No demolition-specific flat fee is published; billed under the Town's general Building Permit Fee table |
Retaining Wall (Standalone) Permit
VerifiedRequired for standalone retaining walls (commercial or residential) in Silverthorne. The Town's Permit Process page publishes a dedicated Retaining Walls (Standalone) permit type; it does not publish a separate stand-alone fence permit type distinct from general building-permit review.
Verified 2026-07-06 · Source
Requirements
- Retaining wall stamped plans
- Retaining wall spec sheet demonstrating what the wall will look like
- Geotechnical engineering study stamped by a licensed professional engineer
- Written approval from landlord if applicable; HOA approval if applicable
- Plan Review: Town of Silverthorne Planning and Engineering Departments review per Town Code; Summit County Building Department conducts Building Code plan review
- No standalone Town-published fence-specific permit page was found distinct from the general building permit process; fence projects should be confirmed directly with the Building Division at (970) 262-7360 as to whether they require a standalone permit or fall under a different permit category
Required documents
- RequiredRetaining Wall Permit Application (SmartGov Portal)Covers both commercial and residential standalone retaining walls
- RequiredGeotechnical Engineering StudyStamped by a licensed professional engineer
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Plan Review Fee | 65% of the Building Permit Fee | Due at submittal |
| Building Permit Fee (valuation-based) | $23.50 minimum, scaling per the Town's general valuation tiers | Due before permit issuance |
Sources & verification
Verified against official sources. Last reviewed 2026-07-06.
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 Silverthorne building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.