Gresham, Oregon Building Permits
Learn Gresham, Oregon building permit steps, fees, review times, zoning, code rules, and plan requirements for home, ADU, tenant and commercial projects.
Wind
ASCE 7 basic wind speed: generally 98 mph Vult for Risk Category II in the Portland/Gresham area; exposure category, topography, and site-specific conditions can increase design pressures, especially on open or elevated sites.
Snow Load
Ground snow load: generally 25 psf at low elevations in Gresham; roof snow load is determined by the Oregon Structural Specialty Code/Oregon Residential Specialty Code based on exposure, thermal condition, roof slope, and drifting.
Flood
Floodplain review is based on FEMA Flood Insurance Rate Maps for Multnomah County. Properties near Johnson Creek, Kelly Creek, Fairview Creek, Beaver Creek, and other drainage corridors may fall in FEMA Zone AE or other special flood hazard areas and may require floodplain development review, elevation documentation, and finished-floor or floodproofing standards.
Earthquake
Seismic Design Category: commonly D or D1/D2 depending on soil class, occupancy, and ASCE 7 site-specific parameters. Gresham is in a high seismic region influenced by Cascadia Subduction Zone and crustal earthquake hazards, so lateral bracing, anchorage, shear walls, and foundation detailing are important.
Wildfire
Most urban Gresham parcels have low to moderate wildfire exposure, but eastern edge, forested, hillside, or wildland-urban interface locations may need additional attention to defensible space, exterior materials, access, and vegetation management. Applicants should verify any current Oregon wildfire hazard mapping, local fire access standards, and Fire Marshal requirements for the parcel.
Building Department
City of Gresham Building Permits and Inspections, Community Development Department
Approval Timeline
Simple residential mechanical, electrical, plumbing, reroof, and minor repair permits may be issued same day to a few business days when complete. Residential structural projects commonly take 2 to 4 weeks for first review. Larger residential work, ADUs, new homes, or projects needing planning/public works review may take 4 to 8 weeks. Commercial tenant improvements often take 3 to 6 weeks for first review, while new commercial buildings, change-of-occupancy projects, fire/life-safety upgrades, and site-development projects may take 6 to 12 weeks or longer depending on corrections and outside-agency approvals.
Common Requirements
Typical submittals include a completed permit application, owner/contractor information, construction valuation, site plan, floor plans, elevations, framing and foundation details, energy code forms, structural calculations when required, truss layouts, mechanical/electrical/plumbing documents, erosion control information, and stormwater or utility plans when site work is involved. Commercial projects usually require code summaries, occupancy classification, construction type, exiting plans, accessibility details, fire-resistance assemblies, fire alarm/sprinkler information, and stamped drawings from Oregon-licensed professionals when applicable.
Zoning Information
Gresham zoning is governed by the Gresham Community Development Code and the city's zoning map. Properties are assigned residential, commercial, employment, industrial, mixed-use, civic, open-space, or plan-district designations, with standards for use, setbacks, height, lot coverage, parking, landscaping, and design review. Overlay and special areas may apply, including Downtown, Civic Neighborhood, Pleasant Valley, Springwater, natural resource, hillside, floodplain, and transit corridor standards. Zoning approval is often required before or during building permit review.
Permit Costs
Fees are based on project valuation and permit type under the city's adopted fee schedule. Small trade permits often range from about $75 to $300. Minor residential remodels, decks, sheds, and small additions commonly range from about $300 to $1,500 in building permit and plan review fees. Larger additions, ADUs, and new homes may involve several thousand dollars in building, plan review, system development charges, utility, and school construction excise tax fees. Commercial tenant improvements often range from about $1,000 to $10,000 or more, while new commercial buildings can be substantially higher based on valuation and site impacts.
Engineering Requirements
Oregon-licensed engineering is commonly required for engineered beams, posts, shear walls, retaining walls over about 4 feet or supporting surcharge, complex foundations, lateral/seismic design, trusses outside prescriptive limits, significant structural alterations, commercial and multifamily buildings, and projects using non-prescriptive construction methods. One- and two-family dwellings may use Oregon Residential Specialty Code prescriptive provisions when the design stays within code limits, but the city can request calculations or a stamped design when loads, spans, soils, or site conditions warrant it.
Local Code Adoption
Gresham enforces Oregon statewide specialty codes, including the current Oregon Structural Specialty Code and Oregon Residential Specialty Code, generally the 2023 Oregon codes based on the 2021 IBC/IRC with Oregon amendments, plus current Oregon mechanical, plumbing, electrical, energy, fire, and accessibility provisions and local municipal code requirements.
Typical Projects
Common Gresham permit projects include kitchen and bathroom remodels, basement conversions, decks, patio covers, garages, ADUs, additions, new single-family homes, roof replacements, solar installations, tenant improvements, restaurant and retail build-outs, warehouse improvements, seismic upgrades, fire alarm/sprinkler work, and site improvements related to growing residential and commercial corridors.