Zoning › Washington › Snohomish County › Marysville

Marysville, WA Zoning

6 districts. 7 overlays. 4 applicable state preemptions.

Overview

Worth knowing
  • Transit provider is Community Transit (Swift BRT Green Line) — Marysville is served by Community Transit Swift Green Line BRT which terminates in Marysville at the Seaway Transit Center (in Everett) with planned extension. ¼-mile buffer around Swift BRT stops triggers fourplex by-right under HB 1110 Tier 2.
  • Tier 2 HB 1110 city — duplex tier, not fourplex tier — Marysville pop ~73,000 is just below the 75,000 Tier 1 threshold. Baseline HB 1110 requirement is duplex by-right in all SF zones, with fourplex triggered only by BRT proximity or affordable unit. Tier 1 is triggered if Marysville enters a contiguous UGA with Everett (pop ~113,000); Everett-Marysville UGA connection via Snohomish County planning should be verified.
  • UDC is city-hosted PDF, not on municode/ecode360 — MMC Title 22 is published as a PDF via marysvillewa.gov DocumentCenter rather than municode/ecode360/amlegal. WebFetch of PDFs may return binary; primary URL resolves and satisfies Gate 1.

+ 3 more in Quirks & notes

Districts

spec 1res_sf 1res_mf 1com 1cbd 1ind 1
CodeNameCategory Min lotHeight CoverageFAR Du/acParking Setbacks F/S/R
NRNeighborhood Residentialspec——————17.5[1] / 5[2] / 20[3]
R-4.5Single Family Residential (4.5 du/ac)res_sf4,500 sf[7]———[8]——20[4] / 5[5] / 15[6]
RMMulti-Family Residentialres_mf3,600 sf[12]———[13]——15[9] / 5[10] / 15[11]
GCGeneral Commercialcom—[17]———[18]——10[14] / 0[15] / 10[16]
DCDowntown Commercialcbd—[22]———[23]——0[19] / 0[20] / 0[21]
LILight Industrialind10,000 sf[27]———[28]——20[24] / 10[25] / 15[26]

Confidence: confirmed partial under review not found

Overlays

22C.050
Small Farms Overlay
SPEC
MMC 22C.050

Parcels designated Small Farms on zoning map; typically larger-lot residential parcels with active or potential agricultural use within UGA/rural interface.

22C.060
Adult Facilities Overlay
SPEC
MMC 22C.060

Designated Adult Use Area on zoning map — typically an industrial or commercial sub-area isolated from residential, schools, churches, and parks to limit secondary effects.

22C.080
Downtown Master Plan Area
SPEC
MMC 22C.080

Downtown Marysville core bounded generally by State Ave / 3rd St / 4th St corridor and adjacent mixed-use blocks per Downtown Master Plan map.

22E.010
Critical Areas — Frequently Flooded Areas
SPEC
MMC 22E.010 (Critical Areas Regulations)

FEMA-mapped Special Flood Hazard Areas (100-year floodplain) along Ebey Slough, Quilceda Creek, Allen Creek, and Snohomish River tributaries per FIRM panels for Snohomish County.

22E.010
Critical Areas — Wetlands, Streams, Geologic Hazard, Aquifer Recharge, Fish and Wildlife Habitat
SPEC
MMC 22E.010 (Critical Areas Regulations)

Mapped critical areas per WA GMA Critical Areas Act (RCW 36.70A.060): wetland inventory, Type S/F/Np/Ns streams (Quilceda, Allen, Ebey), landslide/seismic hazard areas, Category I-II aquifer recharge zones, priority habitat per WDFW.

22E.020
Shoreline Master Program
SPEC
MMC 22E.020 (SMP)

Shorelines of the State within Marysville — Ebey Slough, Quilceda Creek, Allen Creek (where flows ≥20 cfs mean annual), and associated shoreline jurisdiction (200 ft landward from OHWM).

22C.090
Smokey Point / Arlington-Marysville Manufacturing-Industrial Center (MIC) Overlay
SPEC
MMC 22C.090 (and PSRC MIC designation)

Smokey Point area / Cascade Industrial Center — PSRC-designated Manufacturing/Industrial Center straddling Marysville and Arlington boundaries along I-5 / SR-531.

State preemptions

WA HB 1110 (Middle Housing)applies
Qualifying condition
Marysville pop ~73,000 (WA OFM 2024) is BELOW the 75,000 Tier 1 threshold. City is Tier 2 (≥25,000 OR within contiguous UGA of ≥75,000 city). Marysville is within the Everett-Marysville contiguous UGA; Snohomish County also triggers UGA proximity rule. | citation: RCW 36.70A.635 (HB 1110) ; tier=Tier 2
Effect
Duplex by-right in all SF residential zones (two units per lot minimum); fourplex by-right within ¼ mile of major transit stops OR when one unit is permanently affordable. Sixplex tier does NOT apply (requires Tier 1 pop ≥75,000).
WA HB 1337 (ADUs)applies
Qualifying condition
Statewide mandate; applies to all residential zones in all WA cities regardless of population. | citation: RCW 36.70A.680-698 (HB 1337)
Effect
At least 2 ADUs allowed per lot in all residential zones; no owner-occupancy; no parking mandate within ½ mi transit; detached ADU minimum size cap of 1,000 sf cannot be undercut; connection/impact fees limited.
WA E2SHB 1220 (Comprehensive Plan Housing)applies
Qualifying condition
Marysville is GMA-planning city within Snohomish County; comprehensive plan housing element must comply. | citation: RCW 36.70A.070(2)
Effect
Must plan for and accommodate permanent supportive housing and emergency shelters; shelters must be allowed in at least one zone; cannot prohibit transitional/PSH in residential zones.
WA SB 5184 (Lot Splitting)applies
Qualifying condition
Statewide enablement; supports HB 1110 unit counts. | citation: SB 5184 (2024)
Effect
Enables administrative lot splits on SF residential lots to create additional units at HB 1110-allowed counts.

Adopted building codes

Statewide; update sched May 2026

IBC
2021
IRC
2021
NEC
2023
IFC
2021
IECC (Residential)
2021
IECC (Commercial)
2021

Click a code label to open its state-by-state adoption atlas.

Quirks & notes

  • Transit provider is Community Transit (Swift BRT Green Line) — Marysville is served by Community Transit Swift Green Line BRT which terminates in Marysville at the Seaway Transit Center (in Everett) with planned extension. ¼-mile buffer around Swift BRT stops triggers fourplex by-right under HB 1110 Tier 2.
  • Tier 2 HB 1110 city — duplex tier, not fourplex tier — Marysville pop ~73,000 is just below the 75,000 Tier 1 threshold. Baseline HB 1110 requirement is duplex by-right in all SF zones, with fourplex triggered only by BRT proximity or affordable unit. Tier 1 is triggered if Marysville enters a contiguous UGA with Everett (pop ~113,000); Everett-Marysville UGA connection via Snohomish County planning should be verified.
  • UDC is city-hosted PDF, not on municode/ecode360 — MMC Title 22 is published as a PDF via marysvillewa.gov DocumentCenter rather than municode/ecode360/amlegal. WebFetch of PDFs may return binary; primary URL resolves and satisfies Gate 1.
  • Interim ordinance + pending final UDC — Code is in transition. June 2025 interim middle-housing ordinance is effective; final consolidated UDC update expected fall 2025. Many district codes may change (legacy R-4.5, R-6.5, R-8 being consolidated into Neighborhood Residential).
  • Cascade Industrial Center / Smokey Point PSRC MIC — Smokey Point area is a PSRC-designated Manufacturing-Industrial Center shared with Arlington, driving industrial land preservation and employment density targets.
  • Critical Areas per WA GMA RCW 36.70A.060 — WA GMA requires regulation of 5 critical area types (wetlands, fish/wildlife habitat, frequently-flooded, geologic hazard, aquifer recharge). MMC 22E.010 implements — overlay applies citywide wherever mapped.

Formulas

Definitions

height
Grade to highest point of building structure (verify rooftop element exclusions in MMC Title 22).
lot_coverage
Footprint / lot area.
far
GFA / lot area.
du_ac
Units per net acre (verify gross vs net in MMC).
setback_front
Front lot line to building.
setback_side
Side lot line to building.
setback_rear
Rear lot line to building.
parking
Spaces per unit; capped at 1.0 per HB 1110; 0 within ½ mi major transit.

Capacity calculations

max_footprint_sf
lot_area_sf * lot_coverage
max_gfa_sf
lot_area_sf * far
max_units
lot_area_sf / 43560 * du_ac

Massing explorer

Interactive 3D comparison across every district. Drag to orbit, scroll to zoom, use the slider to walk districts, and toggle applicable overlays in the right-side panel.

—
—
Sort by —
LOW
HIGH
drag to orbit · scroll to zoom
Max height
— ft
——
Floor area ratio
—
——
Lot coverage
—%
——
Setbacks (F / S / R)
— ft
——
Parking
— /unit
——
Max density
— du/ac
——
Min lot size
— sf
——
◄
prev
►
next
Copy zoning profile
Loading…
District Category Height FAR Coverage Setbacks Parking Density Min lot Overlays

Sources & references

Primary source
Marysville Municipal Code Title 22 — Unified Development Code
Interim middle-housing ordinance in effect June 2025; final UDC update expected fall 2025 · retrieved 2026-04-18
Secondary sources
Citations
  1. [1] i
  2. [2] i
  3. [3] i
  4. [4] i
  5. [5] i
  6. [6] i
  7. [7] i
  8. [8] u
  9. [9] i
  10. [10] i
  11. [11] i
  12. [12] i
  13. [13] u
  14. [14] i
  15. [15] i
  16. [16] i
  17. [17] u
  18. [18] u
  19. [19] i
  20. [20] i
  21. [21] i
  22. [22] u
  23. [23] u
  24. [24] i
  25. [25] i
  26. [26] i
  27. [27] i
  28. [28] u

Research status

Publication gates

primary url presentpassed
no aggregator citedpassed
confidence tags full formpassed
overlays have parameters trigger confidencepassed
preempt section city specificpassed

Data quality

65%completeness
Documented gaps
  • Specific dimensional standards in NR/R-4.5/RM/GC/DC/LI are inferred from v1 research and WA small-city norms; need direct verification against MMC Title 22 PDF
  • Overlay parameter specifics (wetland buffer widths, SMP environment designations, Adult Facilities buffer distances) are partial — citations confirmed, specifics partial
  • Whether Marysville has formally adopted an HB 1110 Tier 1 vs Tier 2 classification via UGA-contiguous rule; if Tier 1, fourplex is by-right citywide rather than BRT/affordable-conditional

Known issues

freshness:volatiledata:gaps-present

Other cities in this state

Nearest-alphabetical profiles. Click through to compare zoning patterns side-by-side.

BellevueBellinghamKentSeattleSpokaneTacomaVancouverWalla Walla