Westminster, Colorado Building Permits
Learn Westminster, Colorado building permit steps, fees, timelines, code requirements, zoning reviews, and when engineered plans are needed for local projects.
Wind
ASCE 7 basic wind speed: typically 115 mph Vult for Risk Category II, with exposure category, topography, open terrain, building height, risk category, and local amendments affecting final design.
Snow Load
Ground snow load: typically 30 psf in Westminster, with roof snow load, drifting, sliding snow, and unbalanced loading calculated under the adopted code and ASCE 7.
Flood
Westminster participates in FEMA floodplain management. Properties near Big Dry Creek, Little Dry Creek, Walnut Creek, Farmers High Line Canal drainage areas, and mapped detention/drainage corridors may be in or near FEMA Special Flood Hazard Areas. Floodplain development review, elevation certificates, no-rise analysis, or drainage studies may be required for affected sites.
Earthquake
Seismic design category is generally B for many Westminster residential projects, subject to site class, mapped seismic values, risk category, and geotechnical data. Commercial and essential facilities require project-specific seismic design under the adopted IBC and ASCE 7.
Wildfire
Westminster’s main wildfire concern is grassland and open-space interface exposure rather than forested mountain WUI. Sites near open space, parks, drainageways, or undeveloped grasslands may be reviewed for fire access, hydrant spacing, defensible space, address visibility, roof coverings, and ignition-resistant details where required by code or the fire department.
Building Department
City of Westminster Community Development Department, Building Division
Approval Timeline
Minor residential trade permits are often issued same day to several business days. Residential decks, remodels, basement finishes, additions, and new single-family homes commonly take about 2-4 weeks for first plan review. Commercial tenant improvements often take 3-5 weeks for first review, while new commercial buildings, change-of-use projects, restaurants, assembly occupancies, and projects requiring fire protection, utility, drainage, or planning review may take 4-8 weeks or longer. Incomplete plans and multiple resubmittals extend the schedule.
Common Requirements
Common Westminster submittal requirements include a permit application, project valuation, property address and owner information, contractor license details, a site plan showing lot lines and setbacks, construction drawings, floor plans, elevations, sections, structural framing plans, foundation details, energy code documentation, and product specifications. Residential projects may need truss layouts, beam calculations, insulation details, window U-factor/SHGC information, deck span tables, stair and guard details, and smoke/CO alarm locations. Commercial submittals generally require a code summary, occupancy and construction type, egress and occupant-load calculations, accessibility compliance, fire-resistance details, MEP drawings, COMcheck or approved energy compliance forms, and separate fire sprinkler/alarm drawings when applicable.
Zoning Information
Westminster uses local zoning and development standards to regulate land use, setbacks, height, lot coverage, parking, landscaping, signage, accessory structures, ADUs, and planned developments. Many properties are in residential, commercial, mixed-use, office, industrial, open-space, or planned unit development districts. Zoning review may also address comprehensive-plan consistency, overlay areas, floodplain limits, and design standards for redevelopment corridors and activity centers.
Permit Costs
Westminster permit fees are valuation-based and may include building permit fees, plan review fees, use tax, technology or administrative fees, trade permit fees, and separate utility, drainage, impact, or fire review fees. Small trade permits often fall around $75-$300. Decks, basement finishes, reroofs, and modest remodels commonly range from several hundred dollars to $1,500+. Large remodels, additions, and ADUs may cost $1,500-$6,000+, and new homes or commercial projects can be several thousand to tens of thousands of dollars depending on valuation and utility/impact fees.
Engineering Requirements
Engineer-stamped documents are typically required in Westminster for structural systems outside IRC prescriptive limits, major load-bearing wall removals, new foundations, additions, custom homes, steel or engineered wood beam designs, lateral bracing alternatives, retaining walls over about 4 feet or supporting surcharge, commercial structural work, foundation repairs, rooftop equipment, and solar installations where roof capacity or attachment cannot be verified prescriptively. Geotechnical reports are often important for new construction because expansive soils are common along the Front Range.
Local Code Adoption
Westminster enforces locally adopted International Codes with city amendments, generally based on the 2021 IBC, IRC, IEBC, IMC, IPC, IFGC, IECC, and fire code provisions, along with the Colorado-adopted National Electrical Code. Designers should confirm current amendments, energy requirements, and electrical/plumbing rules with the Building Division before submittal.
Typical Projects
Typical Westminster permit projects include basement finishes, decks, patio covers, kitchen and bathroom remodels, additions, ADUs, detached garages, reroofs, window replacements, solar PV, EV charging stations, HVAC and water heater replacements, multifamily renovations, commercial tenant finishes, restaurants, retail build-outs, office remodels, and redevelopment along major corridors.