You are viewing the permanent link for the record currently in effect, published 2026-07-13.
Silverthorne building permits
VerifiedSilverthorne, Colorado — as published 2026-07-13.
Verified 2026-07-13 · 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 2026-07-13 · 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 | $65.00 | Town of Silverthorne Permit Fees page, re-verified 2026-07-13 (supersedes the $23.50 figure recorded 2026-07-06 — the Town's fee schedule was revised upward) |
| Building Permit Fee — valuation $100,001 to $500,000 | $1,008.25 for the first $100,000, plus $6.73 per additional $1,000 or fraction thereof | Re-verified 2026-07-13; supersedes prior figures |
| Building Permit Fee — valuation $1,000,001 and up | $6,370.25 for the first $1,000,000, plus $3.90 per additional $1,000 or fraction thereof | Re-verified 2026-07-13; supersedes prior figures |
| 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 | $0.55 per square foot of impermeable surface | New building permits only; due before permit issuance. Re-verified 2026-07-13 on the current Permit Fees page (Appendix A, Public Works Sec. 3-9-5); corrects the $0.53/sq ft figure recorded 2026-07-06, which could not be reproduced on the live site. |
| 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 2026-07-13 · 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) | $65.00 minimum, scaling per the valuation tiers in the Town's fee table | Town of Silverthorne Permit Fees page, re-verified 2026-07-13 (supersedes the $23.50 minimum recorded 2026-07-06) |
| 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 2026-07-13 · 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 2026-07-13 · 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 Fee (standalone permit) | 0.0075 x total plumbing valuation, minimum $65.00, plus 65% plan review fee when required | Town of Silverthorne Permit Fees page, re-verified 2026-07-13; when plumbing work is bundled with a building permit rather than standalone, the fee instead uses 0.10 x total building valuation. Supersedes the '10% of job valuation x 0.75 multiplier' formula recorded 2026-07-06, which did not match the live page. The Town still directs applicants to call (970) 262-7360 to confirm the correct calculation. |
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 2026-07-13 · 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 |
|---|---|---|
| Mechanical Fee (standalone permit) | 0.0075 x total mechanical valuation, minimum $65.00, plus 65% plan review fee when required | Town of Silverthorne Permit Fees page, re-verified 2026-07-13; when mechanical work is bundled with a building permit rather than standalone, the fee instead uses 0.10 x total building valuation. Supersedes the '10% of job valuation x 0.75 multiplier' formula recorded 2026-07-06. 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 2026-07-13 · 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) | $65.00 minimum, scaling per valuation tiers | Town of Silverthorne Permit Fees page, re-verified 2026-07-13 (supersedes the $23.50 minimum recorded 2026-07-06) |
| 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 2026-07-13 · 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 |
|---|---|---|
| Demolition Permit Fee | $50.00 flat, including plan review fee | Town of Silverthorne Permit Fees page, re-verified 2026-07-13; corrects the prior entry, which stated no demolition-specific flat fee was published and billed this permit under the general valuation-based Building Permit Fee table — the current live page publishes a dedicated flat Demolition Permit Fee. |
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 2026-07-13 · 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) | $65.00 minimum, scaling per the Town's general valuation tiers | Due before permit issuance. Town of Silverthorne Permit Fees page, re-verified 2026-07-13 (supersedes the $23.50 minimum recorded 2026-07-06) |
Solar Photovoltaic (PV) Permit
VerifiedRequired for installing a rooftop or ground-mount photovoltaic system in Silverthorne. Applications are submitted through the Town of Silverthorne (Community Development Technician intake, with Town Planning, Engineering, and Water & Sewer departments reviewing per Town Code), but the substantive building/electrical code plan review, PV-specific fee, permit issuance, and inspections for the photovoltaic system are performed by the Summit County Building Department — the same county department that handles ALL electrical permits for Silverthorne, since the Town does not intake, fee, or issue electrical/PV permits itself.
Verified 2026-07-20 · Source
Requirements
- Submit through the Town of Silverthorne; the Community Development Technician reviews for completeness, then routes to Town Planning, Engineering, and Water & Sewer for Town Code compliance
- Summit County Building Department separately reviews the PV system against the Building Code and issues the actual Photovoltaic Permit
- Residential roof-mounted systems under 15 kW may be issued over the counter if all submittal materials are provided
- Plan review is mandatory for residential systems over 15 kW, all ground-mounted systems, and all commercial systems
- Payment for plan review is required at the time of submittal for any system requiring review
- Applicants must submit in person with a representative, per Summit County's PV submittal process
Required documents
- RequiredSummit County PV Permit Application (fillable PDF)
- RequiredSummit County PV Permit Submittal Checklist
- RequiredPhotovoltaic Systems Requirements documentSummit County Building Inspection Division's technical requirements for PV submittals
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Photovoltaic Permit — Residential Plan Review | $175.00 | Summit County Building Permit Fee Schedule; independently confirmed twice against the County's own site (Photovoltaic Permits page and Building Permit Fee Schedule page) |
| Photovoltaic Permit — Residential Permit Fee | $325.00 | Summit County Building Permit Fee Schedule. Combined with the $175 plan review fee, totals exactly $500.00 — the statewide residential cap under C.R.S. § 24-48.5-113 (HB21-1284) |
| Photovoltaic Permit — Commercial Plan Review | $350.00 | Summit County Building Permit Fee Schedule |
| Photovoltaic Permit — Commercial Permit Fee | $650.00 | Summit County Building Permit Fee Schedule. Combined with the $350 plan review fee, totals exactly $1,000.00 — the statewide commercial cap under C.R.S. § 24-48.5-113 (HB21-1284) |
EV Charger / EVSE Permit
VerifiedSilverthorne has no distinct electric-vehicle-charging-station permit type or fee line-item. As with all other electrical work in Town, an EV charger (EVSE) circuit is permitted and inspected entirely by the Summit County Building Department, not the Town of Silverthorne — the Town does not intake, fee, or issue electrical permits at all. Summit County's published Building Permit Fee Schedule has no separate EV/EVSE line-item; EV charger installs are billed under the same square-footage/dwelling-unit-based Electrical Permit Fee tiers used for any other electrical circuit addition (same fee mechanism documented in this file's Electrical Permit entry). Summit County's population (~30,000) exceeds the 20,000-population threshold in Colorado HB24-1173, meaning the County was required to adopt, by 12/31/2025, an ordinance either adopting the Colorado Energy Office's EV Charger Permitting Model Code, establishing its own objective EV-charger permitting standards, or affirming continued use of its existing review process — no County ordinance or public confirmation of which of the three compliance paths Summit County chose was located as of this review.
Verified 2026-07-20 · Source
Requirements
- EV charger (EVSE) circuit/panel work must be submitted directly to the Summit County Building Department (37 S.C.R. 1005, Frisco, CO), not to the Town of Silverthorne, per the same Outside Agency Permits routing documented for all electrical work in Town
- Governed by the 2023 NFPA 70 National Electrical Code as adopted (same code cited in this file's Electrical Permit entry)
- No EV/EVSE-specific line-item appears on Summit County's published Building Permit Fee Schedule; the general residential Electrical Permit Fee (based on total building area and number of dwelling units) applies
- Summit County (population >20,000) is a 'covered county permitting agency' under Colorado HB24-1173 (effective 8/7/2024), obligated by 12/31/2025 to adopt an ordinance addressing EV-charger permit standards — no public confirmation of the County's chosen compliance path (model code adoption, custom standards, or status-quo affirmation) was located in this review; this is reported as a genuinely open point rather than assumed
Required documents
- RequiredElectrical Permit Application (Summit County Building Department)Submitted directly to Summit County for the EV charger circuit/panel work, not through the Town's SmartGov portal
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Electrical Permit Fee (EV charger circuit, billed under general electrical fee tiers) | Based on total building area (sq ft) plus number of dwelling units; no distinct EV/EVSE fee line published | Assessed by and paid to Summit County Building Department, (970) 668-3170 — not published on the Town of Silverthorne's fee schedule since the Town does not issue this permit. Confirmed against Summit County's own published Building Permit Fee Schedule, which lists Building, Window, Fireplace, Hot Tub, Electrical, Photovoltaic, Mechanical, Plumbing, and Mobile Home permit fee categories but no separate EV/EVSE category. |
Sources & verification
Verified against official sources. Last reviewed 2026-07-13.
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.