What Seattle Regulates: A Complete Ordinance Overview

As one of the larger cities in Washington, Seattle has a substantial set of local ordinances that govern everything from noise levels to what you can build in your backyard. With about 737000 residents, the city maintains 177 distinct rules across 48 categories. This guide gives you the big picture.

Parking Rules

Towing & Impound Rights: Washington pegs most private impound rates to a percentage of the State Patrol's negotiated contract rate, but Seattle writes its own dollar ceilings on top of that framework. SMC 6.214.220 caps a private impound tow at $183 for the first hour and $130.60 for each hour after it, storage at $30.37 per 12-hour period, and an after-hours release at $100, with the Director adjusting the towing and storage figures annually by the Seattle-Tacoma-Bremerton CPI-U Transportation index.

Also covered: Loading Zones (moderate), EV Charging (moderate), Overnight Parking (moderate). See the full parking rules guide for Seattle for details.

Zoning Overlays & Bonuses

Downtown Design Guide: Seattle requires Design Review before permitting most downtown development: full design review applies at 50,000 square feet of gross floor area in DOC1, DOC2 or DMC zones, and at 20,000 square feet in DRC, DMR, DH1, DH2, PMM (outside the Pike Place Market Historical District), IB or IC zones. A Design Review Board applies citywide and neighborhood design guidelines before SDCI issues a permit..

Also covered: Density Bonus Law (moderate). See the full zoning overlays & bonuses guide for Seattle for details.

Rental Property Rules

Tenant Anti-Harassment: Seattle's tenant anti-harassment rules under SMC 14.06 and tenant protection chapters bar landlords from using threats, repeated unwanted contact, false statements, or service interruptions to drive tenants out, with enforcement by the Seattle Office for Civil Rights (SOCR)..

Also covered: Repairs & Habitability (moderate), Rental Registration (moderate), Rent Control (permissive). See the full rental property rules guide for Seattle for details.

Noise Ordinances

Vehicle Noise: Seattle requires every motor vehicle to run a working muffler that prevents excessive or unusual noise, and bars cut-out or bypass devices entirely. Heavy trucks using engine ("Jake") compression brakes must keep exhaust noise at 83 dBA or less (80 dBA for post-1988 vehicles) or face escalating fines..

Also covered: Decibel Limits (moderate), Construction Hours (moderate), Barking Dogs (moderate). See the full noise ordinances guide for Seattle for details.

Animal Ordinances

Exotic Pets: Seattle makes it unlawful to procure or keep an exotic animal under SMC 9.25.053, a category SMC 9.25.020(M) defines to include primates, big cats, bears, hyenas, crocodilians, elephants, hooved wild species, and any snake eight feet or longer. Violations are a gross misdemeanor under SMC 9.25.100(A), with narrow exceptions for zoos, schools, vets, and 30-day circus permits..

Also covered: Pet Groomer Rules (moderate), Beekeeping (moderate), Mandatory Spay/Neuter (permissive). See the full animal ordinances guide for Seattle for details.

Right to Farm

Agricultural Zoning Protection: Seattle treats urban farming as a protected accessory use in every residential zone under SMC 23.42.051, letting a household grow and sell produce on site as long as retail hours run 7 a.m. to 7 p.m., deliveries are capped at one per day, and no more than two 10,000-pound vehicles support the operation..

Building Safety

Scaffold & Sidewalk Shed: Seattle requires permits for scaffolding erected on public rights-of-way through the Seattle Department of Transportation (SDOT). The Seattle Building Code and Washington Industrial Safety and Health Act (WISHA) establish safety standards for scaffold construction, inspection, and use.

Also covered: Lead Paint (moderate), Electrical Permits (moderate), Carbon Monoxide Detectors (moderate). See the full building safety guide for Seattle for details.

Public Conduct

Public Urination: Seattle Municipal Code 12A.10.100 makes it unlawful to intentionally urinate or defecate in any public place, streets, sidewalks, alleys, parks, parking lots, or even a parked car, where the act could be seen by the public. A first offense is a civil violation carrying up to a $500 fine under SMC 12A.02.080, not a criminal conviction..

Also covered: Public Marijuana Use (restrictive), Loitering Rules (restrictive), Loud Party Ordinance (moderate). See the full public conduct guide for Seattle for details.

Trash & Recycling

Illegal Dumping: Dumping solid waste anywhere in Seattle without authorization is unlawful under SMC 21.36.420. Anything over 1 cubic foot is a misdemeanor or gross misdemeanor depending on volume, and violators must remove the waste and pay a litter cleanup restitution payment on top of any fine..

Also covered: Mandatory Organics Recycling (restrictive), Collection Schedule (moderate), Dumpster Rules (moderate). See the full trash & recycling guide for Seattle for details.

Rental Inspections

Tenant Complaint Process: A Seattle tenant who reports a problem can trigger a City inspection directly: SMC 22.214.050.C requires SDCI to send an inspector into any rental unit a tenant complains about, and if that unit fails on a covered condition, the Director can force every other unit in the building onto the same inspection and certificate-of-compliance track under the Rental Registration and Inspection Ordinance..

Also covered: Inspection Programs (moderate). See the full rental inspections guide for Seattle for details.

Cannabis Regulations

Buffer Zones: Washington RCW 69.50.331 requires cannabis retailers to sit at least 1,000 feet from elementary and secondary schools, playgrounds, parks, libraries, and child-care centers. Seattle SMC 23.42 aligns with the state buffer..

Also covered: Dispensary Zoning (restrictive). See the full cannabis regulations guide for Seattle for details.

Local Taxes & Fees

Business Tax Classification: Seattle's business license (B&O-style) tax sorts every business into rate classifications under SMC 5.45.050, extracting, manufacturing, retailing/wholesaling, printing/publishing, motor-carrier freight, and a catch-all "service and other" category, each taxed on gross proceeds, gross income, or product value at its own rate..

Also covered: Parking Tax (moderate). See the full local taxes & fees guide for Seattle for details.

Swimming Pools & Spas

Pool Permits: Constructing a residential swimming pool in Seattle requires an SDCI building permit under Table D-2 for SMC 22.900D.010, which sets fees as multiples of the project's base fee: four times base fee for an unenclosed pool accessory to a single-family (Group R-3) home, six times base fee for pools accessory to other occupancies or principal-use pools, and lower multiples for standard-plan reviews..

Also covered: Fencing & Safety Requirements (moderate). See the full swimming pools & spas guide for Seattle for details.

Mobility & Curb Rules

Bike Lane Rules: SMC 11.53.190 bars any motor vehicle operator from driving in a Seattle bicycle lane except to make a turning maneuver, and even then the driver must yield to every bicyclist in the lane. Camera-detected violations under this section carry a $75 base penalty per SMC 11.31.121, and the rule sits alongside SMC 11.53.195's requirement that drivers yield to bicyclists in a marked bicycle crossing..

Also covered: Red-Light Cameras (moderate), Shared E-Scooter Rules (moderate), E-Bike Classes (moderate). See the full mobility & curb rules guide for Seattle for details.

Outdoor Lighting

Light Trespass & Shielding: Seattle's Land Use Code requires exterior lighting on commercially zoned lots to be shielded and pointed away from neighboring properties. SMC 23.47A.022 also caps light poles at 30 feet (40 feet in taller zones with an energy-efficiency offset), requires parking-garage lighting to be shielded against nighttime glare, and forces glare screening around any driveway or lot serving more than two vehicles..

Also covered: Billboard Lighting (moderate). See the full outdoor lighting guide for Seattle for details.

Short-Term Rentals

Host Platform Liability: Booking platforms like Airbnb and Vrbo are directly liable under Seattle's short-term rental ordinance for letting unlicensed listings run. SMC 6.600.110 lets SDCI's Director cite a platform $500 per day per listing for the first ten days of noncompliance, then $1,000 per day until it's fixed..

Also covered: Insurance Requirements (moderate), Occupancy Limits (moderate), Repeat Violator Strikes (restrictive). See the full short-term rentals guide for Seattle for details.

Curfew Laws

Park Curfew: SMC 18.12.245 sets general park operating hours from 4:00 a.m. to 11:30 p.m.

Fire Regulations

Fireworks: Seattle doesn't regulate fireworks through a standalone ban ordinance: it permits them through the Fire Code Permit and Fee Ordinance. Anyone staging a public fireworks display needs a Seattle Fire Department permit, applied for in writing at least 30 days ahead, with fees running from $902 for a barge load/unload to $1,805 for an outdoor display under SMC 22.602.045.B..

Also covered: Smoke Detectors (moderate), Fire Pits & Backyard Fires (moderate). See the full fire regulations guide for Seattle for details.

Home Business

Zoning & Home Occupation Permits: Seattle allows a home occupation outright in every zone as an accessory use to a residence, so no separate zoning approval is required, but SMC 23.42.050 caps it at three vehicles of 10,000 lbs or less, bans outdoor storage and drive-in operations, and requires noise, odor, dust and glare to stay within the property line..

Also covered: Home Daycare (limited), Signage Rules (moderate), Customer Traffic Restrictions (moderate). See the full home business guide for Seattle for details.

Fence Regulations

Height Limits: In Seattle's Neighborhood Commercial and Commercial zones, SMC 23.47A.014.G.5 caps fences and freestanding walls inside a required setback at 6 feet, averaged over sloping grade in 6-foot segments but never exceeding 8 feet at any point. Retaining walls and bulkheads used to raise grade top out at 6 feet, and stacking a fence on a new bulkhead limits the combined height to 9.5 feet..

Also covered: Material Restrictions (moderate), Fence Permit Requirements (permissive). See the full fence regulations guide for Seattle for details.

Environmental Rules

Boat Dock Permits: Installing or modifying boat docks in Seattle requires permits under the Shoreline Master Program (SMC 23.60A), federal Army Corps Section 10 permits, and potentially Washington Department of Ecology approvals. Docks must comply with environmental standards protecting salmon habitat and water quality.

Also covered: Flood Elevation Requirements (moderate), Erosion Control (moderate), Stormwater Management (moderate). See the full environmental rules guide for Seattle for details.

Business Licensing & Operations

Massage Establishments: Massage businesses in Seattle must hold both a state Department of Health practitioner license under RCW 18.108 and a city massage business license under SMC 6.290, with background checks, anti-trafficking signage, and inspections targeting illicit massage operations..

Also covered: Towing Companies (strict), Tattoo & Body Modification (moderate), Auto Repair on Residential Property (moderate). See the full business licensing & operations guide for Seattle for details.

Firearms

Concealed Carry: Washington requires a Concealed Pistol License (CPL) to carry a loaded handgun concealed off your premises. King County Sheriff issues CPLs to Seattle residents under RCW 9.41.070.

Also covered: Open Carry (moderate), Firearms in Vehicles (moderate), Local Firearms Preemption (permissive). See the full firearms guide for Seattle for details.

Employment Preemption

Minimum Wage Preemption: Seattle's Minimum Wage Ordinance SMC 14.19 sets a citywide floor well above Washington's, reaching $20.76 per hour in 2025 for all employers with a single rate after small-business tip and benefit credits sunset in 2025..

Also covered: Paid Leave Preemption (strict), Worker Scheduling Preemption (strict). See the full employment preemption guide for Seattle for details.

Filming & Production

Student Filming: Seattle Office of Film + Music issues a free citywide Master Film Permit for productions including student films. Small handheld shoots may proceed without paperwork; tripods, crews, or street use trigger permit and insurance requirements..

Also covered: Location Permits (permissive). See the full filming & production guide for Seattle for details.

Accessory Structures

Tiny Homes: Seattle allows tiny houses on permanent foundations as Detached Accessory Dwelling Units (DADUs) under SMC 23.42.022 and SMC 23.44.041, subject to the same code as any DADU. Tiny houses on wheels (THOWs) are treated as recreational vehicles and may not be used as residences in city residential zones.

Also covered: Shed & Carport Rules (moderate). See the full accessory structures guide for Seattle for details.

Special Events & Permits

Sidewalk Dining & Cafés: SMC 15.16.010 bars anyone from operating a café in a Seattle public place without a Street Use permit from the Director of Transportation. The applicant must be the owner or occupant of the abutting food service business, carry liability insurance, and meet siting standards that protect a pedestrian clear zone and a 3-foot-wide pedestrian straight path..

Also covered: Parade Permits (moderate), Park Event Permits (moderate). See the full special events & permits guide for Seattle for details.

Public Health Rules

Food Handler Certification: Washington RCW 69.06 requires every food worker to obtain a Food Worker Card within two weeks of starting work. King County Public Health issues the card after a free online course and exam, valid for 2-3 years..

Also covered: Rodent Control (moderate). See the full public health rules guide for Seattle for details.

Landscaping Rules

Tree Removal & Heritage Trees: Seattle requires Seattle Department of Construction and Inspections approval in advance before any regulated tree can be removed as hazardous, per SMC 25.11.040, unless the work qualifies as an emergency action under SMC 25.11.030. A registered tree service provider with an ISA Tree Risk Assessment Qualification must first rate the tree Extreme or High Risk, and Tier 1 through Tier 3 replacements are mandatory once the Director approves removal..

Also covered: Weed Ordinances (moderate), Rainwater Harvesting (limited), Native Plants (moderate). See the full landscaping rules guide for Seattle for details.

Sign Regulations

Digital Billboards: Seattle's sign code SMC 23.55 bans new off-premises billboards citywide, prohibits digital conversion of existing billboards, restricts on-premises electronic message centers to 8-second hold times in commercial zones, and bans flashing or animated signs in residential areas..

Also covered: Political Signs (moderate), Freeway-Facing Signs (restrictive), Holiday Displays (limited). See the full sign regulations guide for Seattle for details.

Tree Protection

Protected Tree Species: Seattle's overhauled Tree Protection Ordinance, SMC 25.11 (effective 2023), creates a tiered system. Tier 1 exceptional trees, Tier 2 heritage trees, and Tier 3 trees over 12-inch DBH need permits and replacement..

Also covered: Parkway Planting (moderate), Heritage & Protected Trees (strict). See the full tree protection guide for Seattle for details.

Homelessness & Encampment Rules

Sit-Lie Rules: Seattle bars sitting or lying on a public sidewalk, or on a blanket, chair, or stool placed on one, between 7 a.m. and 9 p.m.

Also covered: Encampment Sanitation (moderate). See the full homelessness & encampment rules guide for Seattle for details.

Historic Preservation

Historic-Cultural Monuments: Seattle SMC 25.12 empowers the Landmarks Preservation Board to designate individual landmarks. Approved landmarks require a Certificate of Approval before any controlled-feature alteration; over 500 landmarks are listed citywide..

Also covered: HPOZ Rules (strict). See the full historic preservation guide for Seattle for details.

Property Maintenance

Property Blight: Seattle's Housing and Building Maintenance Code declares that substandard, deteriorating buildings 'in danger of causing or contributing to the creation of slums or otherwise blighted areas' are hazardous to public health and welfare (SMC 22.200.020.A). SDCI's Director can declare a building unfit for human habitation under SMC 22.208.010 and order it repaired, vacated and closed, or demolished under SMC 22.208.020, with demolition required whenever repair costs exceed 50 percent of replacement value..

Also covered: Vacant Lot Maintenance (moderate), Snow & Sidewalk Clearing (moderate). See the full property maintenance guide for Seattle for details.

Drone Rules

Airport Proximity Rules: FAA controlled-airspace rules govern Seattle drone flights. Sea-Tac (KSEA) and Boeing Field (KBFI) blanket most of the city in Class B or D airspace, requiring LAANC pre-authorization or Part 107 waiver before takeoff..

Building Setbacks & Zoning

Lot Coverage Limits: SMC 23.44.080 caps structure coverage at 50 percent of the lot in Seattle's Neighborhood Residential zones, rising to 60 percent for stacked dwelling units or for low-rise courtyard developments in frequent transit areas. Underground structures, small architectural projections, and low decks and porches don't count toward the cap..

Also covered: Setback Rules (moderate), Structure Height Limits (moderate). See the full building setbacks & zoning guide for Seattle for details.

Noise from Specific Sources

Bar & Nightclub Noise: Bars, clubs and other non-residential properties in Seattle cannot let amplified sound carry into a neighbor's home overnight. SMC 25.08.501 bans amplified noise plainly audible inside a receiving dwelling unit between 10 p.m.

Soliciting & Door-to-Door

No-Knock Registry: Seattle residents can post No Soliciting signs that solicitors must legally respect, and trespass laws protect homeowners who ask solicitors to leave their property..

Also covered: Solicitor Permits (moderate). See the full soliciting & door-to-door guide for Seattle for details.

Water Use Rules

Leak Reporting Duty: Seattle property owners and lessees must keep service pipes and connections in good repair and protected from freezing, and are financially responsible for all damage from leaks and breaks. If repairs are neglected, SPU's Director can enter the premises, make the repairs, and bill the owner..

Sidewalk & Pedestrian Rules

Encroachment Permits: SMC 15.04.010 makes it unlawful to occupy or encroach on any Seattle public place, sidewalk, planting strip, alley, or roadway, without a written Street Use permit from the Director of Transportation, the Seattle Department of Construction and Inspections, or the Superintendent of Parks and Recreation, covering everything from areaways and overhangs to fencing and stored materials..

Also covered: Sidewalk Repair (moderate), Obstruction Rules (restrictive). See the full sidewalk & pedestrian rules guide for Seattle for details.

Privacy & Surveillance

Recording & Consent Laws: Washington is a two-party (all-party) consent state under RCW 9.73.030. Recording any private conversation without consent from all parties is a gross misdemeanor.

Also covered: License Plate Readers (restrictive). See the full privacy & surveillance guide for Seattle for details.

Food Trucks & Mobile Vendors

Food Truck Permits: Seattle Fire Department requires its own annual fire-code permit for any food truck that cooks with propane, natural gas, solid fuel or an open flame: separate from SDCI's food-business license. Permit code 8206-TRK covers an SFD inspection and costs $490 a year to obtain or renew under the Fire Code Permit and Fee Ordinance, SMC Chapter 22.602..

Also covered: Vending Zones (moderate), Sidewalk & Mobile Vending (moderate). See the full food trucks & mobile vendors guide for Seattle for details.

Gambling & Gaming

Card Room Licensing: SMC 12A.22.110 flatly bans running a public cardroom anywhere in Seattle: "It is unlawful for any person to conduct a public cardroom in the City." A companion ban at SMC 12A.50.010 also outlaws letting any premises be used for social card games, with narrow exceptions for licensed nonprofits and private homes..

Solar Energy

HOA Restrictions: Washington state law (RCW 64.38.055) prohibits HOAs from banning solar installations, and Seattle's building code supports solar access with height exemptions, making it one of the most solar-friendly jurisdictions..

HOA Rules

Assessment & Dues: HOA assessments in Seattle are governed by WUCIOA (RCW 64.90). Associations must adopt an annual budget and may levy regular and special assessments.

Also covered: Board Procedures (moderate), CC&R Enforcement (moderate), Architectural Review (moderate). See the full hoa rules guide for Seattle for details.

Earthquake Safety

Unreinforced Masonry: Seattle has identified over 1,100 unreinforced masonry (URM) buildings that pose earthquake collapse hazards. SDCI maintains a public database of all known URM buildings.

Also covered: Seismic Gas Shutoff (moderate), Soft-Story Retrofit (strict). See the full earthquake safety guide for Seattle for details.

Code Violation Reporting

Common Violations: Seattle's most common code violations include unpermitted construction, overgrown vegetation and weeds, substandard housing conditions, illegal use of property, and work exceeding permit scope. SDCI enforces the Seattle Municipal Code and International Building Code..

Also covered: Response Times (moderate), How to Report (moderate). See the full code violation reporting guide for Seattle for details.

Invasive Plant Rules

Prohibited Species: Seattle follows the Washington State Noxious Weed List and King County's noxious weed regulations. Property owners must control Class A, B, and C noxious weeds.

What to Do With This Information

Whether you are renting, buying, or renovating in Seattle, knowing the local rules upfront saves headaches later. Dig into the individual ordinance pages linked above for the complete picture, including fines and exemptions.