Do I need a permit for a small deck or patio in Redmond?

Any deck or platform more than 30 inches above grade requires a permit in Redmond. Decks under 200 square feet can sometimes get a streamlined review, but they still need a permit and inspection. Ground-level patios (poured concrete or pavers at grade) typically do not require permits as long as they don't affect grading or drainage and don't trigger the tree ordinance. If you're unsure, a quick call or online chat with the building department takes 5 minutes.

How much does a typical residential permit cost in Redmond?

Permit fees are based on project valuation. A fence permit runs about $100–$200. A small deck (under 400 square feet) is typically $200–$600 depending on whether it's elevated and whether electrical is involved. A room addition or major remodel starts at $500 and scales upward based on square footage and scope—usually 0.5–1.5% of project cost. Plan-check and inspection fees are included in the base permit fee; there are no surprise add-ons for standard residential work. Electrical and plumbing subpermits add $50–$150 each.

Can I do the work myself on a permitted project in Redmond?

Yes, Redmond allows owner-builders for owner-occupied residential projects. You can frame, finish, do roofing, install fixtures, and do site work yourself. Electrical work must be done by a licensed electrician—no owner-builder exception. Plumbing and HVAC should be done by a licensed contractor (or a licensed homeowner if you hold a specific homeowner trade license). Get the permit in your name as the owner-builder, and you'll be the one scheduling inspections and signing off on the work. Your contractor can still do parts of the job if you're combining owner labor with hired subcontractors.

What's the frost-depth requirement for deck footings in Redmond?

Redmond's frost depth on the Puget Sound side is 12 inches, so deck footings only need to bottom out 12 inches below grade. This is significantly shallower than the IRC's typical 36 inches or the frost depth in eastern Washington (30+ inches). Make sure your plans call out 12 inches and that footings are properly backfilled and set below the frost line. Winter inspections (October–March) are more scrutinized because frost heave risk is real; most inspectors prefer footing inspections in late summer or early fall.

How long does plan review take for a residential permit in Redmond?

The state requires a minimum of 15 days for a complete submission. Redmond typically completes plan review for straightforward residential projects (decks, fences, simple additions) in 2 to 3 weeks. Complex projects (major additions, remodels with structural changes, or projects requiring coordination with utility companies) may take 4 to 6 weeks. The online portal updates automatically as your permit moves through review, and staff e-mail if they need clarifications. Submitting complete, accurate plans on the first go—including site plans, detail sheets, and signed architect or engineer stamps where required—cuts weeks off the timeline.

Do I need a permit to remove a tree in Redmond?

Redmond has a tree ordinance that protects certain species and sizes. Removing a protected tree (typically trees over a certain diameter, or native species like Douglas fir) on a residential lot usually requires a permit and arborist report, even if the removal isn't part of a larger building project. Non-protected trees (small ornamental plantings, willows, some fruit trees) can usually be removed without a permit. The safest move: get a tree survey or call the city's planning department if you're unsure. Tree removal can also be triggered during a remodel or addition plan review, in which case the building department may require a certified arborist assessment.

What if I start a project without a permit in Redmond?

Redmond inspectors actively enforce code. If they discover unpermitted work during inspections on adjacent properties or through complaints, they'll issue a stop-work order and require you to either legalize the work (hire an engineer to validate it, apply for a permit, pay penalties and back fees) or remove it. Legalization costs are always higher than getting the permit upfront—typically 1.5 to 2 times the original permit fee, plus engineer and inspection costs. Insurance and homeowner warranties also won't cover unpermitted work, which can be a real problem if something fails or if you try to sell. The permit process is fast enough in Redmond that there's no financial reason to skip it.

Do I need a permit for a roof replacement in Redmond?

Yes. All roof replacements require permits in Redmond. The new roof must meet the 2021 Washington energy code (higher insulation and thermal performance than older homes typically have), and all asphalt shingles must be Class A fire-rated. The city also uses roof replacement as a trigger for seismic assessment—if the roof is being replaced as part of a larger structural upgrade or remodel, the inspector will check connections and lateral bracing. A straightforward roof replacement (same dimensions, same structure) typically gets a quick plan review and can be completed in a few weeks.

What's the setback requirement for a fence in Redmond?

Setback rules depend on the zoning and lot configuration. Most residential fences in side and rear yards can be set on or near the property line, but front-yard fences are typically set back 5 to 20 feet from the street (varies by zone). Corner-lot fences have sight-triangle restrictions to prevent blocking driver sightlines. Setback requirements are zoned; check your lot's zoning designation on the city's interactive map or ask the building department. Any fence permit application will include a site plan showing the fence line relative to property lines and sight triangles.

How do I submit a permit application in Redmond?

Use the online portal at https://permits.redmond.gov. Create an account, start a new application, select the project type, upload your plans and required documents (site plan, elevation drawings, engineering seals if required), and pay the fee online by credit card. The portal walks you through required fields and document checklists. If you prefer in-person submission, you can visit Redmond City Hall (15670 Marymoor Park Drive) during business hours, but the online portal is faster and gives you email updates automatically. For questions on what documents you need, call the Building Permits office or use the city's online permit wizard.

Building Permits in Redmond, WA (2026)

Do I need a permit in Redmond, WA?

Redmond's rapid growth has made it one of the Pacific Northwest's most actively developed cities, and that growth is reflected in strict permitting and inspection practices. The City of Redmond Building Department enforces the 2021 Washington State Building Code (which adopts and modifies the 2021 IBC), and they process permits through an online portal that most homeowners can access without visiting city hall in person. The city's climate—mild, wet winters with occasional freeze-thaw cycles, and a Puget Sound frost depth of just 12 inches—shapes foundation and exterior requirements differently than the rest of the state. Redmond is also one of the few Puget Sound cities that clearly allows owner-builder work for owner-occupied residential projects, which can save money on some jobs, though certain trades still require licensed professionals. The building department is responsive and pushes permit reviews through quickly—typical turnaround for a standard residential permit is 2 to 3 weeks. This page explains which projects need permits in Redmond, what the local rules are, and how to file.

What's specific to Redmond permits

Redmond uses the 2021 Washington State Building Code, not the IBC directly. Washington's adoption includes state-level amendments that affect everything from energy code to seismic design. The most visible difference for homeowners is that Washington requires higher-efficiency HVAC and water heating than the baseline IBC, and seismic design standards for homes in King County are more stringent than many other states. If you're hiring a contractor or engineer, they'll already know this, but if you're pulling permits yourself, the state code is your reference, not the IRC.

The 12-inch frost depth on the Puget Sound side of Redmond (where most of the city sits) means deck footings, foundation posts, and other ground-contact elements only need to extend 12 inches below grade to avoid frost heave—well below the IRC's typical 36 inches. This is a real cost and labor savings compared to eastern Washington. However, Redmond's volcanic and glacial-till soils are variable; if your lot is in a steep-slope or fill area, the building department may require a geotechnical report. Alluvial soils near creeks can be unstable, especially in winter rains, so grading plans often get scrutinized.

Redmond's online permit portal is functional and widely used. Most residential permits can be submitted, plan-reviewed, and approved entirely online. You'll upload your plans as PDFs, pay the fee by credit card, and receive email notifications as the permit moves through review. Some trades—electrical, plumbing, mechanical—issue subpermits automatically once the main building permit is approved. The portal also tracks inspection scheduling; inspectors communicate inspection results via email. This is one of the smoothest municipal permit systems in the region.

The city explicitly allows owner-builders for owner-occupied residential work. You do not need to hold a contractor's license to pull a permit for your own home. However, certain trades are always licensed: electrical work requires a licensed electrician (owner-builder exception does not apply), plumbing work requires a licensed plumber or contractor with plumbing scope, and HVAC requires a licensed HVAC contractor. Roofing, framing, and finish work can be owner-built. Plan-check fees and inspection fees are the same whether you hire a contractor or do the work yourself.

Redmond's lot sizes and setback rules are tighter than much of the metro area, especially in the older downtown core and established neighborhoods. Many lots are shallow (100 feet front-to-back) and narrow (under 60 feet wide), which affects where you can place decks, sheds, and fences. The city also has an active tree ordinance; some species are protected, and removing a protected tree on a residential lot often requires a permit even if the removal itself wouldn't otherwise trigger building review. Check your lot survey and the zoning map before finalizing any outdoor project.

Most common Redmond permit projects

These projects show up dozens of times a month in Redmond's permit office. Most are straightforward to approve if the plans are complete and the proposal complies with local zoning. Click any project name to see the specific requirements and typical fees for Redmond.

Decks

Attached decks over 200 square feet and all elevated decks require permits. Redmond's shallow frost depth (12 inches) reduces footing cost compared to the rest of Washington, but the city requires proof of proper post-to-beam connections and through-bolting for all elevated work.

Fences

Fences over 6 feet high, all front-yard fences, and fences in corner-lot sight triangles need permits. Most rear-yard wood and vinyl fences under 6 feet do not, but you'll want to confirm with the city because setback rules in Redmond vary by neighborhood.

Roof replacement

Roof replacements in Redmond require permits and inspections. New roofing must meet the 2021 Washington energy code (higher thermal resistance than older homes), and asphalt shingles must be Class A fire-rated. The permit also triggers a seismic check if the roof is being replaced as part of a larger structural upgrade.

Electrical work

Any panel upgrade, subpanel addition, or major electrical work requires both a building permit and an electrical subpermit. Licensed electrician required. Plan review includes arc-flash hazard assessment and code-compliance check.

Room additions

Any room addition, garage addition, or major remodel triggering a full plan review. Redmond's seismic and energy-code requirements apply to all new construction and to any remodel over 25% of the room's floor area. Plan review typically takes 3 weeks.

Windows

Single-window and door replacements often don't require permits if they're like-for-like and don't affect structural members. Whole-house replacement projects or changes to header size usually do. The city's energy code may require upgraded glazing (U-factor) on some replacements.

Do I need a building permit in Redmond, WA?