The Boulder, Colorado Building Department operates through the City of Boulder’s Planning & Development Services (P&DS). It handles building permit applications, construction plan reviews, contractor-related requirements, and building inspections for properties within Boulder city limits. Residents and contractors can apply for permits, check application status, and request inspections through the city’s online Customer Self-Service (CSS) portal.
Check your property jurisdiction and project requirements, prepare the appropriate application documents, then submit your request through the city’s official permit portal. For application assistance, call 303-441-1880.
Boulder Building Department: Contact & Office Information
| Official department | City of Boulder Planning & Development Services |
|---|---|
| Building services | Permits, plan review, inspections, building codes, contractor licensing information |
| Office address | 1101 Arapahoe Avenue, Boulder, CO 80302 |
| General phone | 303-441-1880 |
| Inspections contact | 303-441-4088 |
| Public service hours | Tuesday–Friday, 10 a.m.–4 p.m. Mountain Time |
| Official website | bouldercolorado.gov |
| Online services | Customer Self-Service Portal |
| Information reviewed | October 2026 |
Office service hours are different from construction inspection hours. Check the official website for holiday closures or service changes before visiting.
When Do You Need a Building Permit in Boulder?
A building permit is generally required for construction, significant alterations, additions, demolition, structural changes, and regulated electrical, plumbing, or mechanical work. Boulder also has exemptions for certain minor projects. Permit exemptions do not override zoning, floodplain, historic-preservation, or other applicable rules.
| Project | Typical permit guidance |
|---|---|
| New house or addition | Building permit and applicable plan review required. |
| Kitchen or bathroom remodel | Permit requirements depend on structural, electrical, plumbing, and mechanical changes. |
| Roof replacement | Roofing replacement is a listed permit category. |
| Deck construction | Permit requirements depend on structure, height, attachment, and project conditions. |
| Small detached shed | A one-story residential accessory shed may be exempt if it is no more than 120 square feet, no higher than 10 feet, and has no utilities. |
| Fence | Fences not exceeding 7 feet are generally exempt from building permits, subject to other applicable approvals. |
| Painting or flooring | Ordinary cosmetic finish work is generally exempt. |
| Solar or electrical work | Applicable electrical or other permits are generally required. |
| Water heater or HVAC replacement | Mechanical or plumbing permits may apply, depending on the work. |
Important local exceptions: A fence in a floodplain may need a floodplain development permit. Work in a designated historic district or on a landmark property may require a Landmark Alteration Certificate. Even an exempt shed must comply with applicable placement, zoning, and other restrictions.
For the official exemption list, visit Building Permits and Inspections and open the “When a permit is needed” section.
How to Apply for a Boulder Building Permit
Boulder uses an online Customer Self-Service system for building permit applications. Completing the correct checklist before submission helps avoid missing-document notices and additional review cycles.
- Confirm the property: Open the city’s Property Information page. Check the property address, zoning, and any applicable development restrictions.
- Choose the permit category: Visit the Building Permit Application Guides and Forms page. Select the appropriate residential, multifamily, commercial, or trade-permit instructions.
- Prepare your documents: Gather the applicable project drawings, site plans, construction details, contractor information, and supporting forms identified in your checklist.
- Open the permit portal: Go to the official CSS portal and log in or register an account.
- Start your application: Select the appropriate permit application type and enter the property, project, and applicant details requested by the portal.
- Upload supporting documents: Attach the required plans and forms, following the city’s file-naming and submission instructions.
- Submit and track: Submit the application and monitor the Dashboard for fee notices, review comments, correction requests, and approval status.
What Documents Should You Prepare?
The exact document package depends on your work. The city’s residential guides provide separate checklists for new construction, alterations, additions, decks, sheds, and other projects. Commercial and multifamily projects use their own requirements.
| Document or information | When relevant |
|---|---|
| Property address and project description | For identifying and describing the application |
| Site plan | For new buildings, additions, or site-related changes |
| Construction drawings | For work requiring technical plan review |
| Structural plans or engineering | For applicable structural modifications |
| Energy-code documentation | When required for the proposed construction |
| Contractor license information | When a licensed contractor is performing the work |
| Supplementary approvals | For applicable floodplain, landmark, zoning, or other reviews |
Boulder generally requires structural modifications to be supported by plans prepared by a Colorado-licensed structural engineer. Project-specific exceptions and foundation-design rules may apply. Confirm the applicable criteria before commissioning drawings.
Check a Boulder Building Permit Status
You can monitor your application without visiting the department office.
- Open the Customer Self-Service Portal.
- Sign in using the account associated with the application.
- Open the Dashboard.
- Select View My Permits.
- Choose the relevant permit to review its current status, attachments, and available actions.
Applications can require corrections or additional documents before approval. Respond to requests through the appropriate portal process. General review duration depends on the project scope, completeness, and required departmental reviews.
If you need information about previous permits or property records rather than an active application, start with the city’s property information resources.
Boulder Building Inspections: Scheduling & Requirements
Required inspections verify that construction complies with approved plans and applicable codes. Inspection types depend on the permit and can include foundation, framing, electrical, plumbing, mechanical, and final inspections.
How to Schedule an Inspection Online
- Visit the official CSS portal and log in.
- Select Search in the portal menu.
- Enter the exact permit number and submit the search.
- Open the permit number shown in the results.
- Select the Inspections tab.
- Check the available inspection actions and select Request Inspection.
- Follow the scheduling prompts and select an available date. Grayed-out dates cannot be requested.
| Inspection days | Monday–Friday |
|---|---|
| Inspection hours | 7 a.m.–5:30 p.m. |
| Arrival estimate | Check the portal’s today’s-inspections information for an estimated two-hour arrival window. |
| Inspector assignment | Check the portal on inspection morning; assignments may change until 7 a.m. |
| Required inspection photos | Where requested, send photos with the permit number and address to the inspector by 2 p.m. on inspection day. |
| On-site plans | Have printed city-approved, stamped plans available for inspection. |
Inspection start times may be delayed on the first and third Tuesday of the month. Requested arrival windows are not guaranteed.
Homeowners may request a morning or afternoon inspection by adding the request, contact name, and telephone number in the scheduling notes. For inspection-specific questions, call 303-441-4088 or consult the city’s building inspector directory.
Right-of-way inspections: These use a separate scheduling process through the city’s Right of Way team, including certain final water, wastewater, and site-drainage inspections. Do not assume they are scheduled through the normal building-inspection workflow.
Building Permit Fees in Boulder (2026)
Boulder does not charge one flat price for every building permit. The amount depends on the project valuation, permit type, related trade work, and applicable reviews or taxes.
Under the city’s 2026 schedule, building permit valuation is determined using the greater of the city’s valuation-table amount or the applicant’s estimated value of the work. That valuation is used to calculate applicable building permit charges and estimated construction use-tax prepayment.
| Possible charge | When it may apply |
|---|---|
| Building permit fee | Building work covered by the permit |
| Plan review fee | Projects requiring plan examination |
| Electrical permit | Electrical work associated with the project |
| Mechanical permit | Applicable HVAC or mechanical installations |
| Plumbing permit | Applicable plumbing work |
| Sales and construction use taxes | As required by the project’s taxable work and materials |
| Additional review or reinspection charges | Where applicable under city fee rules |
Important 2026 consideration: An affordable housing impact fee for qualifying replacement homes and substantial additions to single-unit homes applies to complete building permit applications submitted on or after January 31, 2026. Check whether your project falls within that requirement before budgeting.
Use the official 2026 Schedule of Fees for current fee tables and applicable calculation rules. Rates in effect at the time of application apply. Avoid relying on a generic online permit-cost estimate for a final project budget.
Boulder Building Codes Adopted for 2026
The City of Boulder adopted the 2024 International Code Council code suite, with local amendments, effective August 1, 2025. Additional requirements govern energy conservation, electrical installations, wildfire exposure, and site-specific conditions.
| Code or requirement | 2026 applicability |
|---|---|
| International Building Code | 2024 edition with Boulder amendments |
| International Residential Code | 2024 edition with Boulder amendments |
| Other adopted ICC codes | Applicable 2024 plumbing, mechanical, existing-building and related codes with amendments |
| Energy conservation | 2024 City of Boulder Energy Conservation Code |
| Electrical | 2026 National Electrical Code for applications on or after August 1, 2026 |
| Wildland-urban interface | 2024 International Wildland-Urban Interface Code with local amendments, where applicable |
For electrical permit applications before August 1, 2026, the prior applicable rules may differ. Always confirm the code edition governing the specific permit’s application date.
Consult the city’s Building Codes and Regulations page for amendments and legally adopted standards.
Local Conditions That May Affect Construction
Boulder’s construction requirements reflect local wind, snow, frost, wildfire, and site conditions. The city’s published design criteria include a 40 psf ground snow load, a 32-inch frost depth, and different three-second wind gust values east and west of Broadway.
Projects in mapped floodplains, historic districts, or wildland-urban interface areas may need additional review. Properties with steep slopes or geologic constraints may also require soils reports or engineered drainage information.
These are not substitutes for project-specific structural design. Confirm the applicable property conditions and approved design criteria before construction.
Common Permit Problems & Practical Solutions
| Problem | What to do |
|---|---|
| Application returned for corrections | Read reviewer comments, update the affected documents, and resubmit through the prescribed portal process. |
| Cannot request an inspection | Check whether prerequisite conditions, required documents, or inspection stages remain incomplete. |
| Inspector cannot review plans | Download and print the city-approved plan set from the permit’s Attachments tab. |
| Permit nearing expiration | Contact P&DS before expiration to ask about the required extension process. |
| Previously unpermitted work | Consult the city’s legalization guidance before covering or changing work that may need inspection. |
| Historic or floodplain property | Identify additional approvals before starting construction or submitting dependent applications. |
Permit Expiration Rules
Boulder generally provides a 180-calendar-day period for application progress and a separate 180-day commencement or inactivity limit for issued permits, subject to the city’s good-faith progress rules. Authorized construction generally must be completed and approved for occupancy within three years of permit issuance.
Extensions should be requested before the applicable expiration. Contact P&DS at 303-441-1880 or PDSpermitadmin@bouldercolorado.gov for the extension process.
Official Boulder Permit Resources
| Official resource | Use it for |
|---|---|
| Building Permits & Inspections | Permit requirements, exemptions, procedures and inspections |
| Customer Self-Service Portal | Online applications, status, records and inspections |
| Application Guides & Forms | Project checklists and supporting documents |
| 2026 Fee Schedule | Permit fees, valuation rules and related charges |
| Building Codes | Adopted code editions and local amendments |
| Property Information | Zoning, property information and permit research |
| Contact P&DS | Office visits, support and appointments |
For projects elsewhere in the Denver metropolitan area, see our Aurora, Colorado building permit guide. Aurora has its own permitting authority, portal, and local requirements.
Frequently Asked Questions
1. Where is the Boulder Building Department located?
The City of Boulder Planning & Development Services office is at 1101 Arapahoe Avenue, Boulder, CO 80302. Published customer service hours are Tuesday through Friday, 10 a.m. to 4 p.m.
2. How do I apply for a building permit in Boulder?
Use the city’s Customer Self-Service portal. First select the correct application checklist, prepare the required plans and forms, then register or sign in to submit the application online.
3. How can I check my Boulder permit status?
Sign in to the CSS portal, open Dashboard, select View My Permits, and choose the application. You can review its status and available permit documents.
4. How much does a Boulder building permit cost in 2026?
The amount depends on project valuation, permit type, trade work, review requirements, and applicable taxes. Boulder’s official 2026 Planning & Development Services fee schedule provides the calculation rules.
5. How do I schedule a building inspection in Boulder?
Open the CSS portal, search for your permit number, select the Inspections tab, choose the relevant inspection action, and use Request Inspection to select an available date.
6. What building codes apply in Boulder in 2026?
Boulder uses the 2024 ICC building-code suite with local amendments and the 2024 City of Boulder Energy Conservation Code. The 2026 National Electrical Code applies to electrical permit applications submitted on or after August 1, 2026.
7. Do I need a permit for a shed or fence in Boulder?
Qualifying one-story residential accessory sheds of no more than 120 square feet and 10 feet in height without utilities may be exempt. Fences not over 7 feet generally do not require building permits, but zoning, floodplain, historic, and other rules still apply.
8. Can homeowners obtain permits without hiring a contractor?
Eligible homeowners may perform qualifying work on their own residence under Boulder’s homeowner-contractor rules. The city requires homeowners to review and complete its homeowner contractor licensing application before applying. Licensed subcontractors are required for work the owner does not personally perform where applicable.
9. How long is a Boulder building permit valid?
The city generally uses 180-day application-progress and construction commencement or inactivity limits. Construction generally must be completed and approved for occupancy within three years after permit issuance. Contact P&DS before expiration about extensions.
10. Is the City of Boulder Building Department the same as Boulder County?
No. The city handles permits within Boulder city limits, while Boulder County generally handles permits for unincorporated county properties. Verify your property’s jurisdiction before applying because permit processes and adopted codes differ.